Palmer Dabbelt [Thu, 25 Apr 2019 19:53:39 +0000 (12:53 -0700)]
KVM: PPC: Book3S HV: smb->smp comment fixup
I made the same typo when trying to grep for uses of smp_wmb and figured
I might as well fix it.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Alexey Kardashevskiy [Fri, 29 Mar 2019 05:43:26 +0000 (16:43 +1100)]
KVM: PPC: Book3S: Allocate guest TCEs on demand too
We already allocate hardware TCE tables in multiple levels and skip
intermediate levels when we can, now it is a turn of the KVM TCE tables.
Thankfully these are allocated already in 2 levels.
This moves the table's last level allocation from the creating helper to
kvmppc_tce_put() and kvm_spapr_tce_fault(). Since such allocation cannot
be done in real mode, this creates a virtual mode version of
kvmppc_tce_put() which handles allocations.
This adds kvmppc_rm_ioba_validate() to do an additional test if
the consequent kvmppc_tce_put() needs a page which has not been allocated;
if this is the case, we bail out to virtual mode handlers.
The allocations are protected by a new mutex as kvm->lock is not suitable
for the task because the fault handler is called with the mmap_sem held
but kvmhv_setup_mmu() locks kvm->lock and mmap_sem in the reverse order.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Alexey Kardashevskiy [Fri, 29 Mar 2019 05:42:20 +0000 (16:42 +1100)]
KVM: PPC: Book3S HV: Avoid lockdep debugging in TCE realmode handlers
The kvmppc_tce_to_ua() helper is called from real and virtual modes
and it works fine as long as CONFIG_DEBUG_LOCKDEP is not enabled.
However if the lockdep debugging is on, the lockdep will most likely break
in kvm_memslots() because of srcu_dereference_check() so we need to use
PPC-own kvm_memslots_raw() which uses realmode safe
rcu_dereference_raw_notrace().
This creates a realmode copy of kvmppc_tce_to_ua() which replaces
kvm_memslots() with kvm_memslots_raw().
Since kvmppc_rm_tce_to_ua() becomes static and can only be used inside
HV KVM, this moves it earlier under CONFIG_KVM_BOOK3S_HV_POSSIBLE.
This moves truly virtual-mode kvmppc_tce_to_ua() to where it belongs and
drops the prmap parameter which was never used in the virtual mode.
Fixes: d3695aa4f452 ("KVM: PPC: Add support for multiple-TCE hcalls", 2016-02-15)
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Alexey Kardashevskiy [Fri, 29 Mar 2019 05:40:13 +0000 (16:40 +1100)]
KVM: PPC: Book3S HV: Fix lockdep warning when entering the guest
The trace_hardirqs_on() sets current->hardirqs_enabled and from here
the lockdep assumes interrupts are enabled although they are remain
disabled until the context switches to the guest. Consequent
srcu_read_lock() checks the flags in rcu_lock_acquire(), observes
disabled interrupts and prints a warning (see below).
This moves trace_hardirqs_on/off closer to __kvmppc_vcore_entry to
prevent lockdep from being confused.
DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
WARNING: CPU: 16 PID: 8038 at kernel/locking/lockdep.c:4128 check_flags.part.25+0x224/0x280
[...]
NIP [
c000000000185b84] check_flags.part.25+0x224/0x280
LR [
c000000000185b80] check_flags.part.25+0x220/0x280
Call Trace:
[
c000003fec253710] [
c000000000185b80] check_flags.part.25+0x220/0x280 (unreliable)
[
c000003fec253780] [
c000000000187ea4] lock_acquire+0x94/0x260
[
c000003fec253840] [
c00800001a1e9768] kvmppc_run_core+0xa60/0x1ab0 [kvm_hv]
[
c000003fec253a10] [
c00800001a1ed944] kvmppc_vcpu_run_hv+0x73c/0xec0 [kvm_hv]
[
c000003fec253ae0] [
c00800001a1095dc] kvmppc_vcpu_run+0x34/0x48 [kvm]
[
c000003fec253b00] [
c00800001a1056bc] kvm_arch_vcpu_ioctl_run+0x2f4/0x400 [kvm]
[
c000003fec253b90] [
c00800001a0f3618] kvm_vcpu_ioctl+0x460/0x850 [kvm]
[
c000003fec253d00] [
c00000000041c4f4] do_vfs_ioctl+0xe4/0x930
[
c000003fec253db0] [
c00000000041ce04] ksys_ioctl+0xc4/0x110
[
c000003fec253e00] [
c00000000041ce78] sys_ioctl+0x28/0x80
[
c000003fec253e20] [
c00000000000b5a4] system_call+0x5c/0x70
Instruction dump:
419e0034 3d220004 39291730 81290000 2f890000 409e0020 3c82ffc6 3c62ffc5
3884be70 386329c0 4bf6ea71 60000000 <
0fe00000>
3c62ffc6 3863be90 4801273d
irq event stamp: 1025
hardirqs last enabled at (1025): [<
c00800001a1e9728>] kvmppc_run_core+0xa20/0x1ab0 [kvm_hv]
hardirqs last disabled at (1024): [<
c00800001a1e9358>] kvmppc_run_core+0x650/0x1ab0 [kvm_hv]
softirqs last enabled at (0): [<
c0000000000f1210>] copy_process.isra.4.part.5+0x5f0/0x1d00
softirqs last disabled at (0): [<
0000000000000000>] (null)
---[ end trace
31180adcc848993e ]---
possible reason: unannotated irqs-off.
irq event stamp: 1025
hardirqs last enabled at (1025): [<
c00800001a1e9728>] kvmppc_run_core+0xa20/0x1ab0 [kvm_hv]
hardirqs last disabled at (1024): [<
c00800001a1e9358>] kvmppc_run_core+0x650/0x1ab0 [kvm_hv]
softirqs last enabled at (0): [<
c0000000000f1210>] copy_process.isra.4.part.5+0x5f0/0x1d00
softirqs last disabled at (0): [<
0000000000000000>] (null)
Fixes: 8b24e69fc47e ("KVM: PPC: Book3S HV: Close race with testing for signals on guest entry", 2017-06-26)
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Suraj Jitindar Singh [Fri, 22 Mar 2019 06:05:45 +0000 (17:05 +1100)]
KVM: PPC: Book3S HV: Implement real mode H_PAGE_INIT handler
Implement a real mode handler for the H_CALL H_PAGE_INIT which can be
used to zero or copy a guest page. The page is defined to be 4k and must
be 4k aligned.
The in-kernel real mode handler halves the time to handle this H_CALL
compared to handling it in userspace for a hash guest.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Suraj Jitindar Singh [Fri, 22 Mar 2019 06:05:44 +0000 (17:05 +1100)]
KVM: PPC: Book3S HV: Implement virtual mode H_PAGE_INIT handler
Implement a virtual mode handler for the H_CALL H_PAGE_INIT which can be
used to zero or copy a guest page. The page is defined to be 4k and must
be 4k aligned.
The in-kernel handler halves the time to handle this H_CALL compared to
handling it in userspace for a radix guest.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Alexey Kardashevskiy [Fri, 29 Mar 2019 05:41:13 +0000 (16:41 +1100)]
KVM: PPC: Book3S: Protect memslots while validating user address
Guest physical to user address translation uses KVM memslots and reading
these requires holding the kvm->srcu lock. However recently introduced
kvmppc_tce_validate() broke the rule (see the lockdep warning below).
This moves srcu_read_lock(&vcpu->kvm->srcu) earlier to protect
kvmppc_tce_validate() as well.
=============================
WARNING: suspicious RCU usage
5.1.0-rc2-le_nv2_aikATfstn1-p1 #380 Not tainted
-----------------------------
include/linux/kvm_host.h:605 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by qemu-system-ppc/8020:
#0:
0000000094972fe9 (&vcpu->mutex){+.+.}, at: kvm_vcpu_ioctl+0xdc/0x850 [kvm]
stack backtrace:
CPU: 44 PID: 8020 Comm: qemu-system-ppc Not tainted 5.1.0-rc2-le_nv2_aikATfstn1-p1 #380
Call Trace:
[
c000003fece8f740] [
c000000000bcc134] dump_stack+0xe8/0x164 (unreliable)
[
c000003fece8f790] [
c000000000181be0] lockdep_rcu_suspicious+0x130/0x170
[
c000003fece8f810] [
c0000000000d5f50] kvmppc_tce_to_ua+0x280/0x290
[
c000003fece8f870] [
c00800001a7e2c78] kvmppc_tce_validate+0x80/0x1b0 [kvm]
[
c000003fece8f8e0] [
c00800001a7e3fac] kvmppc_h_put_tce+0x94/0x3e4 [kvm]
[
c000003fece8f9a0] [
c00800001a8baac4] kvmppc_pseries_do_hcall+0x30c/0xce0 [kvm_hv]
[
c000003fece8fa10] [
c00800001a8bd89c] kvmppc_vcpu_run_hv+0x694/0xec0 [kvm_hv]
[
c000003fece8fae0] [
c00800001a7d95dc] kvmppc_vcpu_run+0x34/0x48 [kvm]
[
c000003fece8fb00] [
c00800001a7d56bc] kvm_arch_vcpu_ioctl_run+0x2f4/0x400 [kvm]
[
c000003fece8fb90] [
c00800001a7c3618] kvm_vcpu_ioctl+0x460/0x850 [kvm]
[
c000003fece8fd00] [
c00000000041c4f4] do_vfs_ioctl+0xe4/0x930
[
c000003fece8fdb0] [
c00000000041ce04] ksys_ioctl+0xc4/0x110
[
c000003fece8fe00] [
c00000000041ce78] sys_ioctl+0x28/0x80
[
c000003fece8fe20] [
c00000000000b5a4] system_call+0x5c/0x70
Fixes: 42de7b9e2167 ("KVM: PPC: Validate TCEs against preregistered memory page sizes", 2018-09-10)
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Suraj Jitindar Singh [Mon, 18 Mar 2019 02:59:46 +0000 (13:59 +1100)]
KVM: PPC: Book3S HV: Perserve PSSCR FAKE_SUSPEND bit on guest exit
There is a hardware bug in some POWER9 processors where a treclaim in
fake suspend mode can cause an inconsistency in the XER[SO] bit across
the threads of a core, the workaround being to force the core into SMT4
when doing the treclaim.
The FAKE_SUSPEND bit (bit 10) in the PSSCR is used to control whether a
thread is in fake suspend or real suspend. The important difference here
being that thread reconfiguration is blocked in real suspend but not
fake suspend mode.
When we exit a guest which was in fake suspend mode, we force the core
into SMT4 while we do the treclaim in kvmppc_save_tm_hv().
However on the new exit path introduced with the function
kvmhv_run_single_vcpu() we restore the host PSSCR before calling
kvmppc_save_tm_hv() which means that if we were in fake suspend mode we
put the thread into real suspend mode when we clear the
PSSCR[FAKE_SUSPEND] bit. This means that we block thread reconfiguration
and the thread which is trying to get the core into SMT4 before it can
do the treclaim spins forever since it itself is blocking thread
reconfiguration. The result is that that core is essentially lost.
This results in a trace such as:
[ 93.512904] CPU: 7 PID: 13352 Comm: qemu-system-ppc Not tainted 5.0.0 #4
[ 93.512905] NIP:
c000000000098a04 LR:
c0000000000cc59c CTR:
0000000000000000
[ 93.512908] REGS:
c000003fffd2bd70 TRAP: 0100 Not tainted (5.0.0)
[ 93.512908] MSR:
9000000302883033 <SF,HV,VEC,VSX,FP,ME,IR,DR,RI,LE,TM[SE]> CR:
22222444 XER:
00000000
[ 93.512914] CFAR:
c000000000098a5c IRQMASK: 3
[ 93.512915] PACATMSCRATCH:
0000000000000001
[ 93.512916] GPR00:
0000000000000001 c000003f6cc1b830 c000000001033100 0000000000000004
[ 93.512928] GPR04:
0000000000000004 0000000000000002 0000000000000004 0000000000000007
[ 93.512930] GPR08:
0000000000000000 0000000000000004 0000000000000000 0000000000000004
[ 93.512932] GPR12:
c000203fff7fc000 c000003fffff9500 0000000000000000 0000000000000000
[ 93.512935] GPR16:
2000000000300375 000000000000059f 0000000000000000 0000000000000000
[ 93.512951] GPR20:
0000000000000000 0000000000080053 004000000256f41f c000003f6aa88ef0
[ 93.512953] GPR24:
c000003f6aa89100 0000000000000010 0000000000000000 0000000000000000
[ 93.512956] GPR28:
c000003f9e9a0800 0000000000000000 0000000000000001 c000203fff7fc000
[ 93.512959] NIP [
c000000000098a04] pnv_power9_force_smt4_catch+0x1b4/0x2c0
[ 93.512960] LR [
c0000000000cc59c] kvmppc_save_tm_hv+0x40/0x88
[ 93.512960] Call Trace:
[ 93.512961] [
c000003f6cc1b830] [
0000000000080053] 0x80053 (unreliable)
[ 93.512965] [
c000003f6cc1b8a0] [
c00800001e9cb030] kvmhv_p9_guest_entry+0x508/0x6b0 [kvm_hv]
[ 93.512967] [
c000003f6cc1b940] [
c00800001e9cba44] kvmhv_run_single_vcpu+0x2dc/0xb90 [kvm_hv]
[ 93.512968] [
c000003f6cc1ba10] [
c00800001e9cc948] kvmppc_vcpu_run_hv+0x650/0xb90 [kvm_hv]
[ 93.512969] [
c000003f6cc1bae0] [
c00800001e8f620c] kvmppc_vcpu_run+0x34/0x48 [kvm]
[ 93.512971] [
c000003f6cc1bb00] [
c00800001e8f2d4c] kvm_arch_vcpu_ioctl_run+0x2f4/0x400 [kvm]
[ 93.512972] [
c000003f6cc1bb90] [
c00800001e8e3918] kvm_vcpu_ioctl+0x460/0x7d0 [kvm]
[ 93.512974] [
c000003f6cc1bd00] [
c0000000003ae2c0] do_vfs_ioctl+0xe0/0x8e0
[ 93.512975] [
c000003f6cc1bdb0] [
c0000000003aeb24] ksys_ioctl+0x64/0xe0
[ 93.512978] [
c000003f6cc1be00] [
c0000000003aebc8] sys_ioctl+0x28/0x80
[ 93.512981] [
c000003f6cc1be20] [
c00000000000b3a4] system_call+0x5c/0x70
[ 93.512983] Instruction dump:
[ 93.512986]
419dffbc e98c0000 2e8b0000 38000001 60000000 60000000 60000000 40950068
[ 93.512993]
392bffff 39400000 79290020 39290001 <
7d2903a6>
60000000 60000000 7d235214
To fix this we preserve the PSSCR[FAKE_SUSPEND] bit until we call
kvmppc_save_tm_hv() which will mean the core can get into SMT4 and
perform the treclaim. Note kvmppc_save_tm_hv() clears the
PSSCR[FAKE_SUSPEND] bit again so there is no need to explicitly do that.
Fixes: 95a6432ce9038 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Paolo Bonzini [Thu, 28 Mar 2019 18:07:30 +0000 (19:07 +0100)]
Merge tag 'kvmarm-fixes-for-5.1' of git://git./linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/ARM fixes for 5.1
- Fix THP handling in the presence of pre-existing PTEs
- Honor request for PTE mappings even when THPs are available
- GICv4 performance improvement
- Take the srcu lock when writing to guest-controlled ITS data structures
- Reset the virtual PMU in preemptible context
- Various cleanups
Paolo Bonzini [Thu, 28 Mar 2019 16:22:31 +0000 (17:22 +0100)]
Documentation: kvm: clarify KVM_SET_USER_MEMORY_REGION
The documentation does not mention how to delete a slot, add the
information.
Reported-by: Nathaniel McCallum <npmccallum@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Fri, 15 Feb 2019 20:48:40 +0000 (12:48 -0800)]
KVM: doc: Document the life cycle of a VM and its resources
The series to add memcg accounting to KVM allocations[1] states:
There are many KVM kernel memory allocations which are tied to the
life of the VM process and should be charged to the VM process's
cgroup.
While it is correct to account KVM kernel allocations to the cgroup of
the process that created the VM, it's technically incorrect to state
that the KVM kernel memory allocations are tied to the life of the VM
process. This is because the VM itself, i.e. struct kvm, is not tied to
the life of the process which created it, rather it is tied to the life
of its associated file descriptor. In other words, kvm_destroy_vm() is
not invoked until fput() decrements its associated file's refcount to
zero. A simple example is to fork() in Qemu and have the child sleep
indefinitely; kvm_destroy_vm() isn't called until Qemu closes its file
descriptor *and* the rogue child is killed.
The allocations are guaranteed to be *accounted* to the process which
created the VM, but only because KVM's per-{VM,vCPU} ioctls reject the
ioctl() with -EIO if kvm->mm != current->mm. I.e. the child can keep
the VM "alive" but can't do anything useful with its reference.
Note that because 'struct kvm' also holds a reference to the mm_struct
of its owner, the above behavior also applies to userspace allocations.
Given that mucking with a VM's file descriptor can lead to subtle and
undesirable behavior, e.g. memcg charges persisting after a VM is shut
down, explicitly document a VM's lifecycle and its impact on the VM's
resources.
Alternatively, KVM could aggressively free resources when the creating
process exits, e.g. via mmu_notifier->release(). However, mmu_notifier
isn't guaranteed to be available, and freeing resources when the creator
exits is likely to be error prone and fragile as KVM would need to
ensure that it only freed resources that are truly out of reach. In
practice, the existing behavior shouldn't be problematic as a properly
configured system will prevent a child process from being moved out of
the appropriate cgroup hierarchy, i.e. prevent hiding the process from
the OOM killer, and will prevent an unprivileged user from being able to
to hold a reference to struct kvm via another method, e.g. debugfs.
[1]https://patchwork.kernel.org/patch/
10806707/
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Wed, 13 Mar 2019 23:49:31 +0000 (16:49 -0700)]
KVM: selftests: complete IO before migrating guest state
Documentation/virtual/kvm/api.txt states:
NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_PAPR and
KVM_EXIT_EPR the corresponding operations are complete (and guest
state is consistent) only after userspace has re-entered the
kernel with KVM_RUN. The kernel side will first finish incomplete
operations and then check for pending signals. Userspace can
re-enter the guest with an unmasked signal pending to complete
pending operations.
Because guest state may be inconsistent, starting state migration after
an IO exit without first completing IO may result in test failures, e.g.
a proposed change to KVM's handling of %rip in its fast PIO handling[1]
will cause the new VM, i.e. the post-migration VM, to have its %rip set
to the IN instruction that triggered KVM_EXIT_IO, leading to a test
assertion due to a stage mismatch.
For simplicitly, require KVM_CAP_IMMEDIATE_EXIT to complete IO and skip
the test if it's not available. The addition of KVM_CAP_IMMEDIATE_EXIT
predates the state selftest by more than a year.
[1] https://patchwork.kernel.org/patch/
10848545/
Fixes: fa3899add1056 ("kvm: selftests: add basic test for state save and restore")
Reported-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Wed, 13 Mar 2019 19:43:14 +0000 (12:43 -0700)]
KVM: selftests: disable stack protector for all KVM tests
Since 4.8.3, gcc has enabled -fstack-protector by default. This is
problematic for the KVM selftests as they do not configure fs or gs
segments (the stack canary is pulled from fs:0x28). With the default
behavior, gcc will insert a stack canary on any function that creates
buffers of 8 bytes or more. As a result, ucall() will hit a triple
fault shutdown due to reading a bad fs segment when inserting its
stack canary, i.e. every test fails with an unexpected SHUTDOWN.
Fixes: 14c47b7530e2d ("kvm: selftests: introduce ucall")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Wed, 13 Mar 2019 23:19:30 +0000 (16:19 -0700)]
KVM: selftests: explicitly disable PIE for tests
KVM selftests embed the guest "image" as a function in the test itself
and extract the guest code at runtime by manually parsing the elf
headers. The parsing is very simple and doesn't supporting fancy things
like position independent executables. Recent versions of gcc enable
pie by default, which results in triple fault shutdowns in the guest due
to the virtual address in the headers not matching up with the virtual
address retrieved from the function pointer.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Wed, 13 Mar 2019 20:19:26 +0000 (13:19 -0700)]
KVM: selftests: assert on exit reason in CR4/cpuid sync test
...so that the test doesn't end up in an infinite loop if it fails for
whatever reason, e.g. SHUTDOWN due to gcc inserting stack canary code
into ucall() and attempting to derefence a null segment.
Fixes: ca359066889f7 ("kvm: selftests: add cr4_cpuid_sync_test")
Cc: Wei Huang <wei@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Tue, 12 Mar 2019 03:01:05 +0000 (20:01 -0700)]
KVM: x86: update %rip after emulating IO
Most (all?) x86 platforms provide a port IO based reset mechanism, e.g.
OUT 92h or CF9h. Userspace may emulate said mechanism, i.e. reset a
vCPU in response to KVM_EXIT_IO, without explicitly announcing to KVM
that it is doing a reset, e.g. Qemu jams vCPU state and resumes running.
To avoid corruping %rip after such a reset, commit
0967b7bf1c22 ("KVM:
Skip pio instruction when it is emulated, not executed") changed the
behavior of PIO handlers, i.e. today's "fast" PIO handling to skip the
instruction prior to exiting to userspace. Full emulation doesn't need
such tricks becase re-emulating the instruction will naturally handle
%rip being changed to point at the reset vector.
Updating %rip prior to executing to userspace has several drawbacks:
- Userspace sees the wrong %rip on the exit, e.g. if PIO emulation
fails it will likely yell about the wrong address.
- Single step exits to userspace for are effectively dropped as
KVM_EXIT_DEBUG is overwritten with KVM_EXIT_IO.
- Behavior of PIO emulation is different depending on whether it
goes down the fast path or the slow path.
Rather than skip the PIO instruction before exiting to userspace,
snapshot the linear %rip and cancel PIO completion if the current
value does not match the snapshot. For a 64-bit vCPU, i.e. the most
common scenario, the snapshot and comparison has negligible overhead
as VMCS.GUEST_RIP will be cached regardless, i.e. there is no extra
VMREAD in this case.
All other alternatives to snapshotting the linear %rip that don't
rely on an explicit reset announcenment suffer from one corner case
or another. For example, canceling PIO completion on any write to
%rip fails if userspace does a save/restore of %rip, and attempting to
avoid that issue by canceling PIO only if %rip changed then fails if PIO
collides with the reset %rip. Attempting to zero in on the exact reset
vector won't work for APs, which means adding more hooks such as the
vCPU's MP_STATE, and so on and so forth.
Checking for a linear %rip match technically suffers from corner cases,
e.g. userspace could theoretically rewrite the underlying code page and
expect a different instruction to execute, or the guest hardcodes a PIO
reset at 0xfffffff0, but those are far, far outside of what can be
considered normal operation.
Fixes: 432baf60eee3 ("KVM: VMX: use kvm_fast_pio_in for handling IN I/O")
Cc: <stable@vger.kernel.org>
Reported-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Vitaly Kuznetsov [Wed, 13 Mar 2019 17:13:42 +0000 (18:13 +0100)]
x86/kvm/hyper-v: avoid spurious pending stimer on vCPU init
When userspace initializes guest vCPUs it may want to zero all supported
MSRs including Hyper-V related ones including HV_X64_MSR_STIMERn_CONFIG/
HV_X64_MSR_STIMERn_COUNT. With commit
f3b138c5d89a ("kvm/x86: Update SynIC
timers on guest entry only") we began doing stimer_mark_pending()
unconditionally on every config change.
The issue I'm observing manifests itself as following:
- Qemu writes 0 to STIMERn_{CONFIG,COUNT} MSRs and marks all stimers as
pending in stimer_pending_bitmap, arms KVM_REQ_HV_STIMER;
- kvm_hv_has_stimer_pending() starts returning true;
- kvm_vcpu_has_events() starts returning true;
- kvm_arch_vcpu_runnable() starts returning true;
- when kvm_arch_vcpu_ioctl_run() gets into
(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED) case:
- kvm_vcpu_block() gets in 'kvm_vcpu_check_block(vcpu) < 0' and returns
immediately, avoiding normal wait path;
- -EAGAIN is returned from kvm_arch_vcpu_ioctl_run() immediately forcing
userspace to retry.
So instead of normal wait path we get a busy loop on all secondary vCPUs
before they get INIT signal. This seems to be undesirable, especially given
that this happens even when Hyper-V extensions are not used.
Generally, it seems to be pointless to mark an stimer as pending in
stimer_pending_bitmap and arm KVM_REQ_HV_STIMER as the only thing
kvm_hv_process_stimers() will do is clear the corresponding bit. We may
just not mark disabled timers as pending instead.
Fixes: f3b138c5d89a ("kvm/x86: Update SynIC timers on guest entry only")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Xiaoyao Li [Fri, 8 Mar 2019 07:57:20 +0000 (15:57 +0800)]
kvm/x86: Move MSR_IA32_ARCH_CAPABILITIES to array emulated_msrs
Since MSR_IA32_ARCH_CAPABILITIES is emualted unconditionally even if
host doesn't suppot it. We should move it to array emulated_msrs from
arry msrs_to_save, to report to userspace that guest support this msr.
Signed-off-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Thu, 7 Mar 2019 23:43:02 +0000 (15:43 -0800)]
KVM: x86: Emulate MSR_IA32_ARCH_CAPABILITIES on AMD hosts
The CPUID flag ARCH_CAPABILITIES is unconditioinally exposed to host
userspace for all x86 hosts, i.e. KVM advertises ARCH_CAPABILITIES
regardless of hardware support under the pretense that KVM fully
emulates MSR_IA32_ARCH_CAPABILITIES. Unfortunately, only VMX hosts
handle accesses to MSR_IA32_ARCH_CAPABILITIES (despite KVM_GET_MSRS
also reporting MSR_IA32_ARCH_CAPABILITIES for all hosts).
Move the MSR_IA32_ARCH_CAPABILITIES handling to common x86 code so
that it's emulated on AMD hosts.
Fixes: 1eaafe91a0df4 ("kvm: x86: IA32_ARCH_CAPABILITIES is always supported")
Cc: stable@vger.kernel.org
Reported-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sebastian Andrzej Siewior [Fri, 15 Mar 2019 17:58:15 +0000 (18:58 +0100)]
kvm: don't redefine flags as something else
The function irqfd_wakeup() has flags defined as __poll_t and then it
has additional flags which is used for irqflags.
Redefine the inner flags variable as iflags so it does not shadow the
outer flags.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Ben Gardon [Tue, 12 Mar 2019 18:45:59 +0000 (11:45 -0700)]
kvm: mmu: Used range based flushing in slot_handle_level_range
Replace kvm_flush_remote_tlbs with kvm_flush_remote_tlbs_with_address
in slot_handle_level_range. When range based flushes are not enabled
kvm_flush_remote_tlbs_with_address falls back to kvm_flush_remote_tlbs.
This changes the behavior of many functions that indirectly use
slot_handle_level_range, iff the range based flushes are enabled. The
only potential problem I see with this is that kvm->tlbs_dirty will be
cleared less often, however the only caller of slot_handle_level_range that
checks tlbs_dirty is kvm_mmu_notifier_invalidate_range_start which
checks it and does a kvm_flush_remote_tlbs after calling
kvm_unmap_hva_range anyway.
Tested: Ran all kvm-unit-tests on a Intel Haswell machine with and
without this patch. The patch introduced no new failures.
Signed-off-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Masahiro Yamada [Mon, 18 Mar 2019 09:08:12 +0000 (18:08 +0900)]
KVM: export <linux/kvm_para.h> and <asm/kvm_para.h> iif KVM is supported
I do not see any consistency about headers_install of <linux/kvm_para.h>
and <asm/kvm_para.h>.
According to my analysis of Linux 5.1-rc1, there are 3 groups:
[1] Both <linux/kvm_para.h> and <asm/kvm_para.h> are exported
alpha, arm, hexagon, mips, powerpc, s390, sparc, x86
[2] <asm/kvm_para.h> is exported, but <linux/kvm_para.h> is not
arc, arm64, c6x, h8300, ia64, m68k, microblaze, nios2, openrisc,
parisc, sh, unicore32, xtensa
[3] Neither <linux/kvm_para.h> nor <asm/kvm_para.h> is exported
csky, nds32, riscv
This does not match to the actual KVM support. At least, [2] is
half-baked.
Nor do arch maintainers look like they care about this. For example,
commit
0add53713b1c ("microblaze: Add missing kvm_para.h to Kbuild")
exported <asm/kvm_para.h> to user-space in order to fix an in-kernel
build error.
We have two ways to make this consistent:
[A] export both <linux/kvm_para.h> and <asm/kvm_para.h> for all
architectures, irrespective of the KVM support
[B] Match the header export of <linux/kvm_para.h> and <asm/kvm_para.h>
to the KVM support
My first attempt was [A] because the code looks cleaner, but Paolo
suggested [B].
So, this commit goes with [B].
For most architectures, <asm/kvm_para.h> was moved to the kernel-space.
I changed include/uapi/linux/Kbuild so that it checks generated
asm/kvm_para.h as well as check-in ones.
After this commit, there will be two groups:
[1] Both <linux/kvm_para.h> and <asm/kvm_para.h> are exported
arm, arm64, mips, powerpc, s390, x86
[2] Neither <linux/kvm_para.h> nor <asm/kvm_para.h> is exported
alpha, arc, c6x, csky, h8300, hexagon, ia64, m68k, microblaze,
nds32, nios2, openrisc, parisc, riscv, sh, sparc, unicore32, xtensa
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Wei Yang [Thu, 27 Sep 2018 00:31:26 +0000 (08:31 +0800)]
KVM: x86: remove check on nr_mmu_pages in kvm_arch_commit_memory_region()
* nr_mmu_pages would be non-zero only if kvm->arch.n_requested_mmu_pages is
non-zero.
* nr_mmu_pages is always non-zero, since kvm_mmu_calculate_mmu_pages()
never return zero.
Based on these two reasons, we can merge the two *if* clause and use the
return value from kvm_mmu_calculate_mmu_pages() directly. This simplify
the code and also eliminate the possibility for reader to believe
nr_mmu_pages would be zero.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Krish Sadhukhan [Thu, 7 Feb 2019 19:05:30 +0000 (14:05 -0500)]
kvm: nVMX: Add a vmentry check for HOST_SYSENTER_ESP and HOST_SYSENTER_EIP fields
According to section "Checks on VMX Controls" in Intel SDM vol 3C, the
following check is performed on vmentry of L2 guests:
On processors that support Intel 64 architecture, the IA32_SYSENTER_ESP
field and the IA32_SYSENTER_EIP field must each contain a canonical
address.
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Singh, Brijesh [Fri, 15 Feb 2019 17:24:12 +0000 (17:24 +0000)]
KVM: SVM: Workaround errata#1096 (insn_len maybe zero on SMAP violation)
Errata#1096:
On a nested data page fault when CR.SMAP=1 and the guest data read
generates a SMAP violation, GuestInstrBytes field of the VMCB on a
VMEXIT will incorrectly return 0h instead the correct guest
instruction bytes .
Recommend Workaround:
To determine what instruction the guest was executing the hypervisor
will have to decode the instruction at the instruction pointer.
The recommended workaround can not be implemented for the SEV
guest because guest memory is encrypted with the guest specific key,
and instruction decoder will not be able to decode the instruction
bytes. If we hit this errata in the SEV guest then log the message
and request a guest shutdown.
Reported-by: Venkatesh Srinivas <venkateshs@google.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Fri, 15 Feb 2019 20:48:39 +0000 (12:48 -0800)]
KVM: Reject device ioctls from processes other than the VM's creator
KVM's API requires thats ioctls must be issued from the same process
that created the VM. In other words, userspace can play games with a
VM's file descriptors, e.g. fork(), SCM_RIGHTS, etc..., but only the
creator can do anything useful. Explicitly reject device ioctls that
are issued by a process other than the VM's creator, and update KVM's
API documentation to extend its requirements to device ioctls.
Fixes: 852b6d57dc7f ("kvm: add device control API")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Fri, 15 Feb 2019 20:48:38 +0000 (12:48 -0800)]
KVM: doc: Fix incorrect word ordering regarding supported use of APIs
Per Paolo[1], instantiating multiple VMs in a single process is legal;
but this conflicts with KVM's API documentation, which states:
The only supported use is one virtual machine per process, and one
vcpu per thread.
However, an earlier section in the documentation states:
Only run VM ioctls from the same process (address space) that was used
to create the VM.
and:
Only run vcpu ioctls from the same thread that was used to create the
vcpu.
This suggests that the conflicting documentation is simply an incorrect
ordering of of words, i.e. what's really meant is that a virtual machine
can't be shared across multiple processes and a vCPU can't be shared
across multiple threads.
Tweak the blurb on issuing ioctls to use a more assertive tone, and
rewrite the "supported use" sentence to reference said blurb instead of
poorly restating it in different terms.
Opportunistically add missing punctuation.
[1] https://lkml.kernel.org/r/
f23265d4-528e-3bd4-011f-
4d7b8f3281db@redhat.com
Fixes: 9c1b96e34717 ("KVM: Document basic API")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
[Improve notes on asynchronous ioctl]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Thu, 7 Mar 2019 23:27:44 +0000 (15:27 -0800)]
KVM: x86: fix handling of role.cr4_pae and rename it to 'gpte_size'
The cr4_pae flag is a bit of a misnomer, its purpose is really to track
whether the guest PTE that is being shadowed is a 4-byte entry or an
8-byte entry. Prior to supporting nested EPT, the size of the gpte was
reflected purely by CR4.PAE. KVM fudged things a bit for direct sptes,
but it was mostly harmless since the size of the gpte never mattered.
Now that a spte may be tracking an indirect EPT entry, relying on
CR4.PAE is wrong and ill-named.
For direct shadow pages, force the gpte_size to '1' as they are always
8-byte entries; EPT entries can only be 8-bytes and KVM always uses
8-byte entries for NPT and its identity map (when running with EPT but
not unrestricted guest).
Likewise, nested EPT entries are always 8-bytes. Nested EPT presents a
unique scenario as the size of the entries are not dictated by CR4.PAE,
but neither is the shadow page a direct map. To handle this scenario,
set cr0_wp=1 and smap_andnot_wp=1, an otherwise impossible combination,
to denote a nested EPT shadow page. Use the information to avoid
incorrectly zapping an unsync'd indirect page in __kvm_sync_page().
Providing a consistent and accurate gpte_size fixes a bug reported by
Vitaly where fast_cr3_switch() always fails when switching from L2 to
L1 as kvm_mmu_get_page() would force role.cr4_pae=0 for direct pages,
whereas kvm_calc_mmu_role_common() would set it according to CR4.PAE.
Fixes: 7dcd575520082 ("x86/kvm/mmu: check if tdp/shadow MMU reconfiguration is needed")
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sean Christopherson [Thu, 7 Mar 2019 23:27:43 +0000 (15:27 -0800)]
KVM: nVMX: Do not inherit quadrant and invalid for the root shadow EPT
Explicitly zero out quadrant and invalid instead of inheriting them from
the root_mmu. Functionally, this patch is a nop as we (should) never
set quadrant for a direct mapped (EPT) root_mmu and nested EPT is only
allowed if EPT is used for L1, and the root_mmu will never be invalid at
this point.
Explicitly setting flags sets the stage for repurposing the legacy
paging bits in role, e.g. nxe, cr0_wp, and sm{a,e}p_andnot_wp, at which
point 'smm' would be the only flag to be inherited from root_mmu.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Zenghui Yu [Mon, 25 Mar 2019 08:02:05 +0000 (08:02 +0000)]
KVM: arm/arm64: Comments cleanup in mmu.c
Some comments in virt/kvm/arm/mmu.c are outdated. Update them to
reflect the current state of the code.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[maz: commit message tidy-up]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Linus Torvalds [Sun, 24 Mar 2019 21:02:26 +0000 (14:02 -0700)]
Linux 5.1-rc2
Linus Torvalds [Sun, 24 Mar 2019 20:41:37 +0000 (13:41 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Miscellaneous ext4 bug fixes for 5.1"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: prohibit fstrim in norecovery mode
ext4: cleanup bh release code in ext4_ind_remove_space()
ext4: brelse all indirect buffer in ext4_ind_remove_space()
ext4: report real fs size after failed resize
ext4: add missing brelse() in add_new_gdb_meta_bg()
ext4: remove useless ext4_pin_inode()
ext4: avoid panic during forced reboot
ext4: fix data corruption caused by unaligned direct AIO
ext4: fix NULL pointer dereference while journal is aborted
Linus Torvalds [Sun, 24 Mar 2019 18:42:10 +0000 (11:42 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler updates from Thomas Gleixner:
"Third more careful attempt for this set of fixes:
- Prevent a 32bit math overflow in the cpufreq code
- Fix a buffer overflow when scanning the cgroup2 cpu.max property
- A set of fixes for the NOHZ scheduler logic to prevent waking up
CPUs even if the capacity of the busy CPUs is sufficient along with
other tweaks optimizing the behaviour for asymmetric systems
(big/little)"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Skip LLC NOHZ logic for asymmetric systems
sched/fair: Tune down misfit NOHZ kicks
sched/fair: Comment some nohz_balancer_kick() kick conditions
sched/core: Fix buffer overflow in cgroup2 property cpu.max
sched/cpufreq: Fix 32-bit math overflow
Linus Torvalds [Sun, 24 Mar 2019 18:16:27 +0000 (11:16 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf updates from Thomas Gleixner:
"A larger set of perf updates.
Not all of them are strictly fixes, but that's solely the tip
maintainers fault as they let the timely -rc1 pull request fall
through the cracks for various reasons including travel. So I'm
sending this nevertheless because rebasing and distangling fixes and
updates would be a mess and risky as well. As of tomorrow, a strict
fixes separation is happening again. Sorry for the slip-up.
Kernel:
- Handle RECORD_MMAP vs. RECORD_MMAP2 correctly so different
consumers of the mmap event get what they requested.
Tools:
- A larger set of updates to perf record/report/scripts vs. time
stamp handling
- More Python3 fixups
- A pile of memory leak plumbing
- perf BPF improvements and fixes
- Finalize the perf.data directory storage"
[ Note: the kernel part is strictly a fix, the updates are purely to
tooling - Linus ]
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
perf bpf: Show more BPF program info in print_bpf_prog_info()
perf bpf: Extract logic to create program names from perf_event__synthesize_one_bpf_prog()
perf tools: Save bpf_prog_info and BTF of new BPF programs
perf evlist: Introduce side band thread
perf annotate: Enable annotation of BPF programs
perf build: Check what binutils's 'disassembler()' signature to use
perf bpf: Process PERF_BPF_EVENT_PROG_LOAD for annotation
perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO
perf feature detection: Add -lopcodes to feature-libbfd
perf top: Add option --no-bpf-event
perf bpf: Save BTF information as headers to perf.data
perf bpf: Save BTF in a rbtree in perf_env
perf bpf: Save bpf_prog_info information as headers to perf.data
perf bpf: Save bpf_prog_info in a rbtree in perf_env
perf bpf: Make synthesize_bpf_events() receive perf_session pointer instead of perf_tool
perf bpf: Synthesize bpf events with bpf_program__get_prog_info_linear()
bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump()
tools lib bpf: Introduce bpf_program__get_prog_info_linear()
perf record: Replace option --bpf-event with --no-bpf-event
perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test()
...
Linus Torvalds [Sun, 24 Mar 2019 18:12:27 +0000 (11:12 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of x86 fixes:
- Prevent potential NULL pointer dereferences in the HPET and HyperV
code
- Exclude the GART aperture from /proc/kcore to prevent kernel
crashes on access
- Use the correct macros for Cyrix I/O on Geode processors
- Remove yet another kernel address printk leak
- Announce microcode reload completion as requested by quite some
people. Microcode loading has become popular recently.
- Some 'Make Clang' happy fixlets
- A few cleanups for recently added code"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/gart: Exclude GART aperture from kcore
x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
x86/mm/pti: Make local symbols static
x86/cpu/cyrix: Remove {get,set}Cx86_old macros used for Cyrix processors
x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors
x86/microcode: Announce reload operation's completion
x86/hyperv: Prevent potential NULL pointer dereference
x86/hpet: Prevent potential NULL pointer dereference
x86/lib: Fix indentation issue, remove extra tab
x86/boot: Restrict header scope to make Clang happy
x86/mm: Don't leak kernel addresses
x86/cpufeature: Fix various quality problems in the <asm/cpu_device_hd.h> header
Linus Torvalds [Sun, 24 Mar 2019 18:09:47 +0000 (11:09 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A set of small fixes plus the removal of stale board support code:
- Remove the board support code from the clpx711x clocksource driver.
This change had fallen through the cracks and I'm sending it now
rather than dealing with people who want to improve that stale code
for 3 month.
- Use the proper clocksource mask on RICSV
- Make local scope functions and variables static"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/clps711x: Remove board support
clocksource/drivers/riscv: Fix clocksource mask
clocksource/drivers/mips-gic-timer: Make gic_compare_irqaction static
clocksource/drivers/timer-ti-dm: Make omap_dm_timer_set_load_start() static
clocksource/drivers/tcb_clksrc: Make tc_clksrc_suspend/resume() static
clocksource/drivers/clps711x: Make clps711x_clksrc_init() static
time/jiffies: Make refined_jiffies static
Linus Torvalds [Sun, 24 Mar 2019 17:58:01 +0000 (10:58 -0700)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Two small fixes:
- Cure a recently introduces error path hickup which tries to
unregister a not registered lockdep key in te workqueue code
- Prevent unaligned cmpxchg() crashes in the robust list handling
code by sanity checking the user space supplied futex pointer"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Ensure that futex address is aligned in handle_futex_death()
workqueue: Only unregister a registered lockdep key
Linus Torvalds [Sun, 24 Mar 2019 17:51:23 +0000 (10:51 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"A set of fixes for the interrupt subsystem:
- Remove secondary GIC support on systems w/o device-tree support
- A set of small fixlets in various irqchip drivers
- static and fall-through annotations
- Kernel doc and typo fixes"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Mark expected switch case fall-through
genirq/devres: Remove excess parameter from kernel doc
irqchip/irq-mvebu-sei: Make mvebu_sei_ap806_caps static
irqchip/mbigen: Don't clear eventid when freeing an MSI
irqchip/stm32: Don't set rising configuration registers at init
irqchip/stm32: Don't clear rising/falling config registers at init
dt-bindings: irqchip: renesas-irqc: Document r8a774c0 support
irqchip/mmp: Make mmp_irq_domain_ops static
irqchip/brcmstb-l2: Make two init functions static
genirq: Fix typo in comment of IRQD_MOVE_PCNTXT
irqchip/gic-v3-its: Fix comparison logic in lpi_range_cmp
irqchip/gic: Drop support for secondary GIC in non-DT systems
irqchip/imx-irqsteer: Fix of_property_read_u32() error handling
Linus Torvalds [Sun, 24 Mar 2019 17:17:33 +0000 (10:17 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull core fixes from Thomas Gleixner:
"Two small fixes:
- Move the large objtool_file struct off the stack so objtool works
in setups with a tight stack limit.
- Make a few variables static in the watchdog core code"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
watchdog/core: Make variables static
objtool: Move objtool_file struct off the stack
Linus Torvalds [Sun, 24 Mar 2019 17:01:53 +0000 (10:01 -0700)]
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux
Pull thermal management fixes from Zhang Rui:
- Fix a wrong __percpu structure declaration in intel_powerclamp driver
(Luc Van Oostenryck)
- Fix truncated name of the idle injection kthreads created by
intel_powerclamp driver (Zhang Rui)
- Fix the missing UUID supports in int3400 thermal driver (Matthew
Garrett)
- Fix a crash when accessing the debugfs of bcm2835 SoC thermal driver
(Phil Elwell)
- A couple of trivial fixes/cleanups in some SoC thermal drivers
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal/intel_powerclamp: fix truncated kthread name
thermal: mtk: Allocate enough space for mtk_thermal.
thermal/int340x_thermal: fix mode setting
thermal/int340x_thermal: Add additional UUIDs
thermal: cpu_cooling: Remove unused cur_freq variable
thermal: bcm2835: Fix crash in bcm2835_thermal_debugfs
thermal: samsung: Fix incorrect check after code merge
thermal/intel_powerclamp: fix __percpu declaration of worker_data
Linus Torvalds [Sun, 24 Mar 2019 16:58:08 +0000 (09:58 -0700)]
Merge tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb3 fixes from Steve French:
- two fixes for stable for guest mount problems with smb3.1.1
- two fixes for crediting (SMB3 flow control) on resent requests
- a byte range lock leak fix
- two fixes for incorrect rc mappings
* tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal module version number
SMB3: Fix SMB3.1.1 guest mounts to Samba
cifs: Fix slab-out-of-bounds when tracing SMB tcon
cifs: allow guest mounts to work for smb3.11
fix incorrect error code mapping for OBJECTID_NOT_FOUND
cifs: fix that return -EINVAL when do dedupe operation
CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN
CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN
Linus Torvalds [Sun, 24 Mar 2019 16:51:55 +0000 (09:51 -0700)]
Merge tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux
Pull auxdisplay updates from Miguel Ojeda:
"A few fixes and improvements for auxdisplay:
- Series to fix a memory leak in hd44780 while introducing
charlcd_free(). From Andy Shevchenko
- Series to clean up the Kconfig menus and a couple of improvements
for charlcd. From Mans Rullgard"
* tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux:
auxdisplay: charlcd: make backlight initial state configurable
auxdisplay: charlcd: simplify init message display
auxdisplay: deconfuse configuration
auxdisplay: hd44780: Convert to use charlcd_free()
auxdisplay: panel: Convert to use charlcd_free()
auxdisplay: charlcd: Introduce charlcd_free() helper
auxdisplay: charlcd: Move to_priv() to charlcd namespace
auxdisplay: hd44780: Fix memory leak on ->remove()
Linus Torvalds [Sun, 24 Mar 2019 16:43:35 +0000 (09:43 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Six fixes to four drivers and two core fixes.
One core fix simply corrects a missed destroy_rcu_head() but the other
is hopefully the end of an ongoing effort to make suspend/resume play
nicely with scsi quiesce"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ibmvscsi: Fix empty event pool access during host removal
scsi: ibmvscsi: Protect ibmvscsi_head from concurrent modificaiton
scsi: hisi_sas: Add softreset in hisi_sas_I_T_nexus_reset()
scsi: qla2xxx: Fix NULL pointer crash due to stale CPUID
scsi: qla2xxx: Fix FC-AL connection target discovery
scsi: core: Avoid that a kernel warning appears during system resume
scsi: core: Also call destroy_rcu_head() for passthrough requests
scsi: iscsi: flush running unbind operations when removing a session
Alexander Shiyan [Thu, 20 Dec 2018 11:16:26 +0000 (14:16 +0300)]
clocksource/drivers/clps711x: Remove board support
Since board support for the CLPS711X platform was removed,
remove the board support from the clps711x-timer driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/20181220111626.17140-1-shc_work@mail.ru
Linus Torvalds [Sat, 23 Mar 2019 17:25:12 +0000 (10:25 -0700)]
Merge tag 'io_uring-
20190323' of git://git.kernel.dk/linux-block
Pull io_uring fixes and improvements from Jens Axboe:
"The first five in this series are heavily inspired by the work Al did
on the aio side to fix the races there.
The last two re-introduce a feature that was in io_uring before it got
merged, but which I pulled since we didn't have a good way to have
BVEC iters that already have a stable reference. These aren't
necessarily related to block, it's just how io_uring pins fixed
buffers"
* tag 'io_uring-
20190323' of git://git.kernel.dk/linux-block:
block: add BIO_NO_PAGE_REF flag
iov_iter: add ITER_BVEC_FLAG_NO_REF flag
io_uring: mark me as the maintainer
io_uring: retry bulk slab allocs as single allocs
io_uring: fix poll races
io_uring: fix fget/fput handling
io_uring: add prepped flag
io_uring: make io_read/write return an integer
io_uring: use regular request ref counts
Linus Torvalds [Sat, 23 Mar 2019 17:14:42 +0000 (10:14 -0700)]
Merge tag 'for-linus-
20190323' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A set of fixes/changes that should go into this series. This contains:
- Kernel doc / comment updates (Bart, Shenghui)
- Un-export of core-only used function (Bart)
- Fix race on loop file access (Dongli)
- pf/pcd queue cleanup fixes (me)
- Use appropriate helper for RESTART bit set (Yufen)
- Use named identifier for classic poll (Yufen)"
* tag 'for-linus-
20190323' of git://git.kernel.dk/linux-block:
sbitmap: trivial - update comment for sbitmap_deferred_clear_bit
blkcg: Fix kernel-doc warnings
blk-iolatency: #include "blk.h"
block: Unexport blk_mq_add_to_requeue_list()
block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value
blk-mq: remove unused 'nr_expired' from blk_mq_hw_ctx
loop: access lo_backing_file only when the loop device is Lo_bound
blk-mq: use blk_mq_sched_mark_restart_hctx to set RESTART
paride/pcd: cleanup queues when detection fails
paride/pf: cleanup queues when detection fails
Linus Torvalds [Sat, 23 Mar 2019 17:04:47 +0000 (10:04 -0700)]
Merge tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A follow up for the new alloc_size logic and a blacklisting fix,
marked for stable"
* tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client:
rbd: drop wait_for_latest_osdmap()
libceph: wait for latest osdmap in ceph_monc_blacklist_add()
rbd: set io_min, io_opt and discard_granularity to alloc_size
Darrick J. Wong [Sat, 23 Mar 2019 16:10:29 +0000 (12:10 -0400)]
ext4: prohibit fstrim in norecovery mode
The ext4 fstrim implementation uses the block bitmaps to find free space
that can be discarded. If we haven't replayed the journal, the bitmaps
will be stale and we absolutely *cannot* use stale metadata to zap the
underlying storage.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
zhangyi (F) [Sat, 23 Mar 2019 15:56:01 +0000 (11:56 -0400)]
ext4: cleanup bh release code in ext4_ind_remove_space()
Currently, we are releasing the indirect buffer where we are done with
it in ext4_ind_remove_space(), so we can see the brelse() and
BUFFER_TRACE() everywhere. It seems fragile and hard to read, and we
may probably forget to release the buffer some day. This patch cleans
up the code by putting of the code which releases the buffers to the
end of the function.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
zhangyi (F) [Sat, 23 Mar 2019 15:43:05 +0000 (11:43 -0400)]
ext4: brelse all indirect buffer in ext4_ind_remove_space()
All indirect buffers get by ext4_find_shared() should be released no
mater the branch should be freed or not. But now, we forget to release
the lower depth indirect buffers when removing space from the same
higher depth indirect block. It will lead to buffer leak and futher
more, it may lead to quota information corruption when using old quota,
consider the following case.
- Create and mount an empty ext4 filesystem without extent and quota
features,
- quotacheck and enable the user & group quota,
- Create some files and write some data to them, and then punch hole
to some files of them, it may trigger the buffer leak problem
mentioned above.
- Disable quota and run quotacheck again, it will create two new
aquota files and write the checked quota information to them, which
probably may reuse the freed indirect block(the buffer and page
cache was not freed) as data block.
- Enable quota again, it will invoke
vfs_load_quota_inode()->invalidate_bdev() to try to clean unused
buffers and pagecache. Unfortunately, because of the buffer of quota
data block is still referenced, quota code cannot read the up to date
quota info from the device and lead to quota information corruption.
This problem can be reproduced by xfstests generic/231 on ext3 file
system or ext4 file system without extent and quota features.
This patch fix this problem by releasing the missing indirect buffers,
in ext4_ind_remove_space().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Gustavo A. R. Silva [Thu, 28 Feb 2019 21:37:14 +0000 (15:37 -0600)]
genirq: Mark expected switch case fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
With -Wimplicit-fallthrough added to CFLAGS:
kernel/irq/manage.c: In function ‘irq_do_set_affinity’:
kernel/irq/manage.c:198:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
cpumask_copy(desc->irq_common_data.affinity, mask);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/irq/manage.c:199:2: note: here
case IRQ_SET_MASK_OK_NOCOPY:
^~~~
Annotate it.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20190228213714.GA9246@embeddedor
Atish Patra [Fri, 22 Mar 2019 21:54:11 +0000 (14:54 -0700)]
clocksource/drivers/riscv: Fix clocksource mask
For all riscv architectures (RV32, RV64 and RV128), the clocksource
is a 64 bit incrementing counter.
Fix the clock source mask accordingly.
Tested on both 64bit and 32 bit virt machine in QEMU.
Fixes: 62b019436814 ("clocksource: new RISC-V SBI timer driver")
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-riscv@lists.infradead.org
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Anup Patel <Anup.Patel@wdc.com>
Cc: Damien Le Moal <Damien.LeMoal@wdc.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190322215411.19362-1-atish.patra@wdc.com
Kairui Song [Fri, 8 Mar 2019 03:05:08 +0000 (11:05 +0800)]
x86/gart: Exclude GART aperture from kcore
On machines where the GART aperture is mapped over physical RAM,
/proc/kcore contains the GART aperture range. Accessing the GART range via
/proc/kcore results in a kernel crash.
vmcore used to have the same issue, until it was fixed with commit
2a3e83c6f96c ("x86/gart: Exclude GART aperture from vmcore")', leveraging
existing hook infrastructure in vmcore to let /proc/vmcore return zeroes
when attempting to read the aperture region, and so it won't read from the
actual memory.
Apply the same workaround for kcore. First implement the same hook
infrastructure for kcore, then reuse the hook functions introduced in the
previous vmcore fix. Just with some minor adjustment, rename some functions
for more general usage, and simplify the hook infrastructure a bit as there
is no module usage yet.
Suggested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jiri Bohac <jbohac@suse.cz>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Dave Young <dyoung@redhat.com>
Link: https://lkml.kernel.org/r/20190308030508.13548-1-kasong@redhat.com
Steve French [Wed, 20 Mar 2019 21:42:50 +0000 (16:42 -0500)]
cifs: update internal module version number
To 2.19
Signed-off-by: Steve French <stfrench@microsoft.com>
Steve French [Sat, 23 Mar 2019 03:31:17 +0000 (22:31 -0500)]
SMB3: Fix SMB3.1.1 guest mounts to Samba
Workaround problem with Samba responses to SMB3.1.1
null user (guest) mounts. The server doesn't set the
expected flag in the session setup response so we have
to do a similar check to what is done in smb3_validate_negotiate
where we also check if the user is a null user (but not sec=krb5
since username might not be passed in on mount for Kerberos case).
Note that the commit below tightened the conditions and forced signing
for the SMB2-TreeConnect commands as per MS-SMB2.
However, this should only apply to normal user sessions and not for
cases where there is no user (even if server forgets to set the flag
in the response) since we don't have anything useful to sign with.
This is especially important now that the more secure SMB3.1.1 protocol
is in the default dialect list.
An earlier patch ("cifs: allow guest mounts to work for smb3.11") fixed
the guest mounts to Windows.
Fixes: 6188f28bf608 ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Paulo Alcantara <palcantara@suse.de>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Paulo Alcantara (SUSE) [Thu, 21 Mar 2019 22:31:22 +0000 (19:31 -0300)]
cifs: Fix slab-out-of-bounds when tracing SMB tcon
This patch fixes the following KASAN report:
[ 779.044746] BUG: KASAN: slab-out-of-bounds in string+0xab/0x180
[ 779.044750] Read of size 1 at addr
ffff88814f327968 by task trace-cmd/2812
[ 779.044756] CPU: 1 PID: 2812 Comm: trace-cmd Not tainted 5.1.0-rc1+ #62
[ 779.044760] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.12.0-0-ga698c89-prebuilt.qemu.org 04/01/2014
[ 779.044761] Call Trace:
[ 779.044769] dump_stack+0x5b/0x90
[ 779.044775] ? string+0xab/0x180
[ 779.044781] print_address_description+0x6c/0x23c
[ 779.044787] ? string+0xab/0x180
[ 779.044792] ? string+0xab/0x180
[ 779.044797] kasan_report.cold.3+0x1a/0x32
[ 779.044803] ? string+0xab/0x180
[ 779.044809] string+0xab/0x180
[ 779.044816] ? widen_string+0x160/0x160
[ 779.044822] ? vsnprintf+0x5bf/0x7f0
[ 779.044829] vsnprintf+0x4e7/0x7f0
[ 779.044836] ? pointer+0x4a0/0x4a0
[ 779.044841] ? seq_buf_vprintf+0x79/0xc0
[ 779.044848] seq_buf_vprintf+0x62/0xc0
[ 779.044855] trace_seq_printf+0x113/0x210
[ 779.044861] ? trace_seq_puts+0x110/0x110
[ 779.044867] ? trace_raw_output_prep+0xd8/0x110
[ 779.044876] trace_raw_output_smb3_tcon_class+0x9f/0xc0
[ 779.044882] print_trace_line+0x377/0x890
[ 779.044888] ? tracing_buffers_read+0x300/0x300
[ 779.044893] ? ring_buffer_read+0x58/0x70
[ 779.044899] s_show+0x6e/0x140
[ 779.044906] seq_read+0x505/0x6a0
[ 779.044913] vfs_read+0xaf/0x1b0
[ 779.044919] ksys_read+0xa1/0x130
[ 779.044925] ? kernel_write+0xa0/0xa0
[ 779.044931] ? __do_page_fault+0x3d5/0x620
[ 779.044938] do_syscall_64+0x63/0x150
[ 779.044944] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 779.044949] RIP: 0033:0x7f62c2c2db31
[ 779.044955] Code: fe ff ff 48 8d 3d 17 9e 09 00 48 83 ec 08 e8 96 02
02 00 66 0f 1f 44 00 00 8b 05 fa fc 2c 00 48 63 ff 85 c0 75 13 31 c0
0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 55 53 48 89 d5 48
89
[ 779.044958] RSP: 002b:
00007ffd6e116678 EFLAGS:
00000246 ORIG_RAX:
0000000000000000
[ 779.044964] RAX:
ffffffffffffffda RBX:
0000560a38be9260 RCX:
00007f62c2c2db31
[ 779.044966] RDX:
0000000000002000 RSI:
00007ffd6e116710 RDI:
0000000000000003
[ 779.044966] RDX:
0000000000002000 RSI:
00007ffd6e116710 RDI:
0000000000000003
[ 779.044969] RBP:
00007f62c2ef5420 R08:
0000000000000000 R09:
0000000000000003
[ 779.044972] R10:
ffffffffffffffa8 R11:
0000000000000246 R12:
00007ffd6e116710
[ 779.044975] R13:
0000000000002000 R14:
0000000000000d68 R15:
0000000000002000
[ 779.044981] Allocated by task 1257:
[ 779.044987] __kasan_kmalloc.constprop.5+0xc1/0xd0
[ 779.044992] kmem_cache_alloc+0xad/0x1a0
[ 779.044997] getname_flags+0x6c/0x2a0
[ 779.045003] user_path_at_empty+0x1d/0x40
[ 779.045008] do_faccessat+0x12a/0x330
[ 779.045012] do_syscall_64+0x63/0x150
[ 779.045017] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 779.045019] Freed by task 1257:
[ 779.045023] __kasan_slab_free+0x12e/0x180
[ 779.045029] kmem_cache_free+0x85/0x1b0
[ 779.045034] filename_lookup.part.70+0x176/0x250
[ 779.045039] do_faccessat+0x12a/0x330
[ 779.045043] do_syscall_64+0x63/0x150
[ 779.045048] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 779.045052] The buggy address belongs to the object at
ffff88814f326600
which belongs to the cache names_cache of size 4096
[ 779.045057] The buggy address is located 872 bytes to the right of
4096-byte region [
ffff88814f326600,
ffff88814f327600)
[ 779.045058] The buggy address belongs to the page:
[ 779.045062] page:
ffffea00053cc800 count:1 mapcount:0 mapping:
ffff88815b191b40 index:0x0 compound_mapcount: 0
[ 779.045067] flags: 0x200000000010200(slab|head)
[ 779.045075] raw:
0200000000010200 dead000000000100 dead000000000200 ffff88815b191b40
[ 779.045081] raw:
0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
[ 779.045083] page dumped because: kasan: bad access detected
[ 779.045085] Memory state around the buggy address:
[ 779.045089]
ffff88814f327800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 779.045093]
ffff88814f327880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 779.045097] >
ffff88814f327900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 779.045099] ^
[ 779.045103]
ffff88814f327980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 779.045107]
ffff88814f327a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 779.045109] ==================================================================
[ 779.045110] Disabling lock debugging due to kernel taint
Correctly assign tree name str for smb3_tcon event.
Signed-off-by: Paulo Alcantara (SUSE) <paulo@paulo.ac>
Signed-off-by: Steve French <stfrench@microsoft.com>
Ronnie Sahlberg [Thu, 21 Mar 2019 04:59:02 +0000 (14:59 +1000)]
cifs: allow guest mounts to work for smb3.11
Fix Guest/Anonymous sessions so that they work with SMB 3.11.
The commit noted below tightened the conditions and forced signing for
the SMB2-TreeConnect commands as per MS-SMB2.
However, this should only apply to normal user sessions and not for
Guest/Anonumous sessions.
Fixes: 6188f28bf608 ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Steve French [Sun, 17 Mar 2019 20:58:38 +0000 (15:58 -0500)]
fix incorrect error code mapping for OBJECTID_NOT_FOUND
It was mapped to EIO which can be confusing when user space
queries for an object GUID for an object for which the server
file system doesn't support (or hasn't saved one).
As Amir Goldstein suggested this is similar to ENOATTR
(equivalently ENODATA in Linux errno definitions) so
changing NT STATUS code mapping for OBJECTID_NOT_FOUND
to ENODATA.
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Amir Goldstein <amir73il@gmail.com>
Xiaoli Feng [Sat, 16 Mar 2019 04:11:54 +0000 (12:11 +0800)]
cifs: fix that return -EINVAL when do dedupe operation
dedupe_file_range operations is combiled into remap_file_range.
But it's always skipped for dedupe operations in function
cifs_remap_file_range.
Example to test:
Before this patch:
# dd if=/dev/zero of=cifs/file bs=1M count=1
# xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
XFS_IOC_FILE_EXTENT_SAME: Invalid argument
After this patch:
# dd if=/dev/zero of=cifs/file bs=1M count=1
# xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
XFS_IOC_FILE_EXTENT_SAME: Operation not supported
Influence for xfstests:
generic/091
generic/112
generic/127
generic/263
These tests report this error "do_copy_range:: Invalid
argument" instead of "FIDEDUPERANGE: Invalid argument".
Because there are still two bugs cause these test failed.
https://bugzilla.kernel.org/show_bug.cgi?id=202935
https://bugzilla.kernel.org/show_bug.cgi?id=202785
Signed-off-by: Xiaoli Feng <fengxiaoli0714@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Long Li [Fri, 15 Mar 2019 07:55:00 +0000 (07:55 +0000)]
CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN
When sending a rdata, transport may return -EAGAIN. In this case
we should re-obtain credits because the session may have been
reconnected.
Change in v2: adjust_credits before re-sending
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Long Li [Fri, 15 Mar 2019 07:54:59 +0000 (07:54 +0000)]
CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN
When sending a wdata, transport may return -EAGAIN. In this case
we should re-obtain credits because the session may have been
reconnected.
Change in v2: adjust_credits before re-sending
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
YueHaibing [Fri, 22 Mar 2019 14:43:59 +0000 (22:43 +0800)]
clocksource/drivers/mips-gic-timer: Make gic_compare_irqaction static
Fix sparse warning:
drivers/clocksource/mips-gic-timer.c:70:18: warning:
symbol 'gic_compare_irqaction' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/20190322144359.19516-1-yuehaibing@huawei.com
YueHaibing [Fri, 22 Mar 2019 14:43:02 +0000 (22:43 +0800)]
clocksource/drivers/timer-ti-dm: Make omap_dm_timer_set_load_start() static
Fix sparse warning:
drivers/clocksource/timer-ti-dm.c:589:5: warning:
symbol 'omap_dm_timer_set_load_start' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/20190322144302.6704-1-yuehaibing@huawei.com
YueHaibing [Fri, 22 Mar 2019 14:39:40 +0000 (22:39 +0800)]
clocksource/drivers/tcb_clksrc: Make tc_clksrc_suspend/resume() static
Fix sparse warnings:
drivers/clocksource/tcb_clksrc.c:74:6: warning:
symbol 'tc_clksrc_suspend' was not declared. Should it be static?
drivers/clocksource/tcb_clksrc.c:89:6: warning:
symbol 'tc_clksrc_resume' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <nicolas.ferre@microchip.com>
Cc: <daniel.lezcano@linaro.org>
Cc: <linux-arm-kernel@lists.infradead.org>
Link: https://lkml.kernel.org/r/20190322143940.12396-1-yuehaibing@huawei.com
YueHaibing [Fri, 22 Mar 2019 14:37:08 +0000 (22:37 +0800)]
clocksource/drivers/clps711x: Make clps711x_clksrc_init() static
Fix sparse warning:
drivers/clocksource/clps711x-timer.c:96:13: warning:
symbol 'clps711x_clksrc_init' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <daniel.lezcano@linaro.org>
Cc: <shc_work@mail.ru>
Cc: <linux-arm-kernel@lists.infradead.org>
Link: https://lkml.kernel.org/r/20190322143708.12716-1-yuehaibing@huawei.com
Thomas Gleixner [Fri, 22 Mar 2019 21:51:21 +0000 (22:51 +0100)]
Merge tag 'perf-core-for-mingo-5.1-
20190321' of git://git./linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo:
BPF:
Song Liu:
- Add support for annotating BPF programs, using the PERF_RECORD_BPF_EVENT
and PERF_RECORD_KSYMBOL recently added to the kernel and plugging
binutils's libopcodes disassembly of BPF programs with the existing
annotation interfaces in 'perf annotate', 'perf report' and 'perf top'
various output formats (--stdio, --stdio2, --tui).
perf list:
Andi Kleen:
- Filter metrics when using substring search.
perf record:
Andi Kleen:
- Allow to limit number of reported perf.data files
- Clarify help for --switch-output.
perf report:
Andi Kleen
- Indicate JITed code better.
- Show all sort keys in help output.
perf script:
Andi Kleen:
- Support relative time.
perf stat:
Andi Kleen:
- Improve scaling.
General:
Changbin Du:
- Fix some mostly error path memory and reference count leaks found
using gcc's ASan and UBSan.
Vendor events:
Mamatha Inamdar:
- Remove P8 HW events which are not supported.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Fri, 22 Mar 2019 21:50:41 +0000 (22:50 +0100)]
Merge tag 'perf-core-for-mingo-5.1-
20190311' of git://git./linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo:
kernel:
Stephane Eranian :
- Restore mmap record type correctly when handling PERF_RECORD_MMAP2
events, as the same template is used for all the threads interested
in mmap events, some may want just PERF_RECORD_MMAP, while some
may want the extra info in MMAP2 records.
perf probe:
Adrian Hunter:
- Fix getting the kernel map, because since changes related to x86 PTI
entry trampolines handling, there are more than one kernel map.
perf script:
Andi Kleen:
- Support insn output for normal samples, i.e.:
perf script -F ip,sym,insn --xed
Will fetch the sample IP from the thread address space and feed it
to Intel's XED disassembler, producing lines such as:
ffffffffa4068804 native_write_msr wrmsr
ffffffffa415b95e __hrtimer_next_event_base movq 0x18(%rax), %rdx
That match 'perf annotate's output.
- Make the --cpu filter apply to PERF_RECORD_COMM/FORK/... events, in
addition to PERF_RECORD_SAMPLE.
perf report:
- Add a new --samples option to save a small random number of samples
per hist entry, using a reservoir technique to select a representative
number of samples.
Then allow browsing the samples using 'perf script' as part of the hist
entry context menu. This automatically adds the right filters, so only
the thread or CPU of the sample is displayed. Then we use less' search
functionality to directly jump to the time stamp of the selected sample.
It uses different menus for assembler and source display. Assembler
needs xed installed and source needs debuginfo.
- Fix the UI browser scripts pop up menu when there are many scripts
available.
perf report:
Andi Kleen:
- Add 'time' sort option. E.g.:
% perf report --sort time,overhead,symbol --time-quantum 1ms --stdio
...
0.67% 277061.87300 [.] _dl_start
0.50% 277061.87300 [.] f1
0.50% 277061.87300 [.] f2
0.33% 277061.87300 [.] main
0.29% 277061.87300 [.] _dl_lookup_symbol_x
0.29% 277061.87300 [.] dl_main
0.29% 277061.87300 [.] do_lookup_x
0.17% 277061.87300 [.] _dl_debug_initialize
0.17% 277061.87300 [.] _dl_init_paths
0.08% 277061.87300 [.] check_match
0.04% 277061.87300 [.] _dl_count_modids
1.33% 277061.87400 [.] f1
1.33% 277061.87400 [.] f2
1.33% 277061.87400 [.] main
1.17% 277061.87500 [.] main
1.08% 277061.87500 [.] f1
1.08% 277061.87500 [.] f2
1.00% 277061.87600 [.] main
0.83% 277061.87600 [.] f1
0.83% 277061.87600 [.] f2
1.00% 277061.87700 [.] main
tools headers:
Arnaldo Carvalho de Melo:
- Update x86's syscall_64.tbl, no change in tools/perf behaviour.
- Sync copies asm-generic/unistd.h and linux/in with the kernel sources.
perf data:
Jiri Olsa:
- Prep work to support having perf.data stored as a directory, with one
file per CPU, that ultimately will allow having one ring buffer reading
thread per CPU.
Vendor events:
Martin Liška:
- perf PMU events for AMD Family 17h.
perf script python:
Tony Jones:
- Add python3 support for the remaining Intel PT related scripts, with
these we should have a clean build of perf with python3 while still
supporting the build with python2.
libbpf:
Arnaldo Carvalho de Melo:
- Fix the build on uCLibc, adding the missing stdarg.h since we use
va_list in one typedef.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Linus Torvalds [Fri, 22 Mar 2019 21:15:11 +0000 (14:15 -0700)]
Merge tag 'powerpc-5.1-3' of git://git./linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"One fix for a boot failure on 32-bit, introduced during the merge
window.
A fix for our handling of CLOCK_MONOTONIC in the 64-bit VDSO. Changing
the wall clock across the Y2038 boundary could cause CLOCK_MONOTONIC
to jump forward and backward.
Our spectre_v2 reporting was a bit confusing due to a bug I
introduced. On some systems it was reporting that the count cache was
disabled and also that we were flushing the count cache on context
switch. Only the former is true, and given that the count cache is
disabled it doesn't make any sense to flush it. No one reported it, so
presumably the presence of any mitigation is all people check for.
Finally a small build fix for zsmalloc on 32-bit.
Thanks to: Ben Hutchings, Christophe Leroy, Diana Craciun, Guenter
Roeck, Michael Neuling"
* tag 'powerpc-5.1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/security: Fix spectre_v2 reporting
powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM configurations
powerpc/6xx: fix setup and use of SPRN_SPRG_PGDIR for hash32
powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038
Linus Torvalds [Fri, 22 Mar 2019 21:10:27 +0000 (14:10 -0700)]
Merge tag 'iommu-fixes-v5.1-rc2' of git://git./linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
- AMD IOMMU fix for sg-mapping with sg->offset > PAGE_SIZE
- Fix for IOVA code to trigger the slow-path less often
- Two fixes for Intel VT-d to avoid writing to read-only registers and
to flush the right domain id for the default domains in scalable mode
* tag 'iommu-fixes-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Save the right domain ID used by hardware
iommu/vt-d: Check capability before disabling protected memory
iommu/iova: Fix tracking of recently failed iova address
iommu/amd: fix sg->dma_address for sg->offset bigger than PAGE_SIZE
Linus Torvalds [Fri, 22 Mar 2019 21:04:38 +0000 (14:04 -0700)]
Merge tag 'sound-5.1-rc2' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"The only significant change is the regression fixes for the jack
detection at resume on HD-audio, while others are all small or trivial
fixes like the coverage of missing error code or usual HD-audio quirk"
* tag 'sound-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek: Enable headset MIC of Acer AIO with ALC286
ALSA: hda - Enforces runtime_resume after S3 and S4 for each codec
ALSA: hda - Don't trigger jackpoll_work in azx_resume
ALSA: opl3: fix mismatch between snd_opl3_drum_switch definition and declaration
ALSA: hda - add Lenovo IdeaCentre B550 to the power_save_blacklist
ALSA: firewire-motu: use 'version' field of unit directory to identify model
ALSA: sb8: add a check for request_region
ALSA: echoaudio: add a check for ioremap_nocache
Linus Torvalds [Fri, 22 Mar 2019 19:08:52 +0000 (12:08 -0700)]
Merge tag 'devprop-5.1-rc2' of git://git./linux/kernel/git/rafael/linux-pm
Pull device properties framework fix from Rafael Wysocki:
"Add missing 'static' in two places (YueHaibing)"
* tag 'devprop-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
drivers: base: swnode: Make two functions static
Linus Torvalds [Fri, 22 Mar 2019 19:07:06 +0000 (12:07 -0700)]
Merge tag 'acpi-5.1-rc2' of git://git./linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Prevent device references acquired by bus_find_device() in
acpi_dev_present() from being leaked (Andy Shevchenko)"
* tag 'acpi-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / utils: Drop reference in test for device presence
Linus Torvalds [Fri, 22 Mar 2019 19:03:19 +0000 (12:03 -0700)]
Merge tag 'pm-5.1-rc2' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These rearrange some code in the generic power domains (genpd)
framework to avoid a potential deadlock and make the turbostat utility
behave more as expected.
Specifics:
- Rearrange the generic power domains (genpd) code to avoid a
potential deadlock possible due to its interactions with the clock
framework (Jiada Wang)
- Make turbostat return the exit status of the command run under it
if that command fails (David Arcari)"
* tag 'pm-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / Domains: Avoid a potential deadlock
tools/power turbostat: return the exit status of a command
Linus Torvalds [Fri, 22 Mar 2019 18:26:57 +0000 (11:26 -0700)]
Merge tag 'mmc-v5.1-rc1' of git://git./linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"A couple of MMC host fixes intended for v5.1:
- alcor: Fix DMA reads
- renesas_sdhi: Limit block count to 16-bit for old revisions
- sdhci-omap: Fixup support for read-only pins
- mxcmmc: Revert support for highmem pages
- davinci/pxamci: Fix clang build warnings"
* tag 'mmc-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: renesas_sdhi: limit block count to 16 bit for old revisions
mmc: alcor: fix DMA reads
mmc: sdhci-omap: Set caps2 to indicate no physical write protect pin
mmc: mxcmmc: "Revert mmc: mxcmmc: handle highmem pages"
mmc: davinci: remove extraneous __init annotation
mmc: pxamci: fix enum type confusion
Shenghui Wang [Sat, 16 Mar 2019 08:24:37 +0000 (16:24 +0800)]
sbitmap: trivial - update comment for sbitmap_deferred_clear_bit
"sbitmap_batch_clear" should be "sbitmap_deferred_clear"
Acked-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Thomas Gleixner [Fri, 22 Mar 2019 16:09:59 +0000 (17:09 +0100)]
Merge branch 'x86/cpu' into x86/urgent
Merge the forgotten cleanup patch for the new file, so the mess does not
propagate further.
Nathan Chancellor [Thu, 7 Mar 2019 21:27:56 +0000 (14:27 -0700)]
x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
When building with -Wsometimes-uninitialized, Clang warns:
arch/x86/kernel/hw_breakpoint.c:355:2: warning: variable 'align' is used
uninitialized whenever switch default is taken
[-Wsometimes-uninitialized]
The default cannot be reached because arch_build_bp_info() initializes
hw->len to one of the specified cases. Nevertheless the warning is valid
and returning -EINVAL makes sure that this cannot be broken by future
modifications.
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/392
Link: https://lkml.kernel.org/r/20190307212756.4648-1-natechancellor@gmail.com
Valdis Kletnieks [Tue, 12 Mar 2019 09:33:48 +0000 (05:33 -0400)]
watchdog/core: Make variables static
sparse complains:
CHECK kernel/watchdog.c
kernel/watchdog.c:45:19: warning: symbol 'nmi_watchdog_available'
was not declared. Should it be static?
kernel/watchdog.c:47:16: warning: symbol 'watchdog_allowed_mask'
was not declared. Should it be static?
They're not referenced by name from anyplace else, make them static.
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/7855.1552383228@turing-police
Valdis Kletnieks [Tue, 12 Mar 2019 08:38:35 +0000 (04:38 -0400)]
time/jiffies: Make refined_jiffies static
sparse complains:
CHECK kernel/time/jiffies.c
kernel/time/jiffies.c:92:20: warning: symbol 'refined_jiffies' was not
declared. Should it be static?
Its only used in file scope. Make it static.
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/32342.1552379915@turing-police
Valdis Kletnieks [Tue, 12 Mar 2019 08:17:56 +0000 (04:17 -0400)]
genirq/devres: Remove excess parameter from kernel doc
Building with 'make W=1' complains:
CC kernel/irq/devres.o
kernel/irq/devres.c:104: warning: Excess function parameter 'thread_fn'
description in 'devm_request_any_context_irq'
Remove it.
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/31207.1552378676@turing-police
Valdis Kletnieks [Tue, 12 Mar 2019 07:47:53 +0000 (03:47 -0400)]
x86/mm/pti: Make local symbols static
With 'make C=2 W=1', sparse and gcc both complain:
CHECK arch/x86/mm/pti.c
arch/x86/mm/pti.c:84:3: warning: symbol 'pti_mode' was not declared. Should it be static?
arch/x86/mm/pti.c:605:6: warning: symbol 'pti_set_kernel_image_nonglobal' was not declared. Should it be static?
CC arch/x86/mm/pti.o
arch/x86/mm/pti.c:605:6: warning: no previous prototype for 'pti_set_kernel_image_nonglobal' [-Wmissing-prototypes]
605 | void pti_set_kernel_image_nonglobal(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pti_set_kernel_image_nonglobal() is only used locally. 'pti_mode' exists in
drivers/hwtracing/intel_th/pti.c as well, but it's a completely unrelated
local (static) symbol.
Make both static.
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/27680.1552376873@turing-police
Chen Jie [Fri, 15 Mar 2019 03:44:38 +0000 (03:44 +0000)]
futex: Ensure that futex address is aligned in handle_futex_death()
The futex code requires that the user space addresses of futexes are 32bit
aligned. sys_futex() checks this in futex_get_keys() but the robust list
code has no alignment check in place.
As a consequence the kernel crashes on architectures with strict alignment
requirements in handle_futex_death() when trying to cmpxchg() on an
unaligned futex address which was retrieved from the robust list.
[ tglx: Rewrote changelog, proper sizeof() based alignement check and add
comment ]
Fixes: 0771dfefc9e5 ("[PATCH] lightweight robust futexes: core")
Signed-off-by: Chen Jie <chenjie6@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <dvhart@infradead.org>
Cc: <peterz@infradead.org>
Cc: <zengweilin@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1552621478-119787-1-git-send-email-chenjie6@huawei.com
Lu Baolu [Wed, 20 Mar 2019 01:58:34 +0000 (09:58 +0800)]
iommu/vt-d: Save the right domain ID used by hardware
The driver sets a default domain id (FLPT_DEFAULT_DID) in the
first level only pasid entry, but saves a different domain id
in @sdev->did. The value saved in @sdev->did will be used to
invalidate the translation caches. Hence, the driver might
result in invalidating the caches with a wrong domain id.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode")
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Lu Baolu [Wed, 20 Mar 2019 01:58:33 +0000 (09:58 +0800)]
iommu/vt-d: Check capability before disabling protected memory
The spec states in 10.4.16 that the Protected Memory Enable
Register should be treated as read-only for implementations
not supporting protected memory regions (PLMR and PHMR fields
reported as Clear in the Capability register).
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: mark gross <mgross@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Fixes: f8bab73515ca5 ("intel-iommu: PMEN support")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Robert Richter [Wed, 20 Mar 2019 18:57:23 +0000 (18:57 +0000)]
iommu/iova: Fix tracking of recently failed iova address
If a 32 bit allocation request is too big to possibly succeed, it
early exits with a failure and then should never update max32_alloc_
size. This patch fixes current code, now the size is only updated if
the slow path failed while walking the tree. Without the fix the
allocation may enter the slow path again even if there was a failure
before of a request with the same or a smaller size.
Cc: <stable@vger.kernel.org> # 4.20+
Fixes: bee60e94a1e2 ("iommu/iova: Optimise attempts to allocate iova from 32bit address range")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Rafael J. Wysocki [Fri, 22 Mar 2019 09:12:13 +0000 (10:12 +0100)]
Merge branch 'pm-domains' into pm
* pm-domains:
PM / Domains: Avoid a potential deadlock
Linus Torvalds [Fri, 22 Mar 2019 03:40:05 +0000 (20:40 -0700)]
Merge tag 'drm-fixes-2019-03-22' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"i915, amdgpu, vmwgfx, exynos, nouveau and udl fixes.
Seems to be lots of little minor ones for regressions in rc1, and some
cleanups. The exynos one is the largest one, and is for a hw
difference between exynos versions"
* tag 'drm-fixes-2019-03-22' of git://anongit.freedesktop.org/drm/drm:
drm/nouveau/dmem: empty chunk do not have a buffer object associated with them.
drm/nouveau/debugfs: Fix check of pm_runtime_get_sync failure
drm/nouveau/dmem: Fix a NULL vs IS_ERR() check
drm/nouveau/dmem: remove set but not used variable 'drm'
drm/exynos/mixer: fix MIXER shadow registry synchronisation code
drm/vmwgfx: Don't double-free the mode stored in par->set_mode
drm/vmwgfx: Return 0 when gmrid::get_node runs out of ID's
drm/amdgpu: fix invalid use of change_bit
drm/amdgpu: revert "cleanup setting bulk_movable"
drm/i915: Sanity check mmap length against object size
drm/i915: Fix off-by-one in reporting hanging process
drm/i915/bios: assume eDP is present on port A when there is no VBT
drm/udl: use drm_gem_object_put_unlocked.
Dave Airlie [Fri, 22 Mar 2019 02:07:16 +0000 (12:07 +1000)]
Merge branch 'drm-fixes-5.1' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
- Parially revert a bulk move clean up change to fix a ref count bug
- Fix invalid use of change_bit that caused a crash on PPC64 and ARM64
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190321020933.3508-1-alexander.deucher@amd.com
Dave Airlie [Fri, 22 Mar 2019 01:53:28 +0000 (11:53 +1000)]
Merge branch 'vmwgfx-fixes-5.1' of git://people.freedesktop.org/~thomash/linux into drm-fixes
Two fixes CC'd stable. One fix for a long-standing a bit hard-to-trigger fbdev
modesetting bug and one out-of-bo-id fix.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190321112026.114328-1-thellstrom@vmware.com
Dave Airlie [Fri, 22 Mar 2019 01:52:40 +0000 (11:52 +1000)]
Merge tag 'exynos-drm-fixes-for-5.1-rc2' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-fixes
- Fix page fault issue at Mixer device
. This patch fixes the page fault issue by correcting sychronization
method for updating shadow registers for Mixer device.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Inki Dae <inki.dae@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553162223-10090-1-git-send-email-inki.dae@samsung.com
Dave Airlie [Fri, 22 Mar 2019 00:41:51 +0000 (10:41 +1000)]
Merge tag 'drm-intel-fixes-2019-03-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
A protection on our mmap against attempts to map past the end of the object;
plus a fix off-by-one in our hang report and a protection;
and a fix for eDP panels on Gen9 platforms on VBT absence.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190320201451.GA7993@intel.com
Dave Airlie [Fri, 22 Mar 2019 00:39:27 +0000 (10:39 +1000)]
Merge branch 'linux-5.1' of git://github.com/skeggsb/linux into drm-fixes
Some minor nouveau dmem and other fixes.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CABDvA==kMkD6n-cS9KpQBcTU1E8p7Wc+H1ZuOhSfD7yTFJVvkw@mail.gmail.com
Jérôme Glisse [Thu, 21 Mar 2019 19:42:18 +0000 (15:42 -0400)]
drm/nouveau/dmem: empty chunk do not have a buffer object associated with them.
Empty chunk do not have a bo associated with them so no need to pin/unpin
on suspend/resume.
This fix suspend/resume on 5.1rc1 when NOUVEAU_SVM is enabled.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Tested-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
YueHaibing [Thu, 28 Feb 2019 12:24:59 +0000 (20:24 +0800)]
drm/nouveau/debugfs: Fix check of pm_runtime_get_sync failure
pm_runtime_get_sync returns negative on failure.
Fixes: eaeb9010bb4b ("drm/nouveau/debugfs: Wake up GPU before doing any reclocking")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Dan Carpenter [Fri, 22 Feb 2019 06:34:04 +0000 (09:34 +0300)]
drm/nouveau/dmem: Fix a NULL vs IS_ERR() check
The hmm_devmem_add() function doesn't return NULL, it returns error
pointers.
Fixes: 5be73b690875 ("drm/nouveau/dmem: device memory helpers for SVM")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
YueHaibing [Thu, 21 Feb 2019 03:38:51 +0000 (03:38 +0000)]
drm/nouveau/dmem: remove set but not used variable 'drm'
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/gpu/drm/nouveau/nouveau_dmem.c: In function 'nouveau_dmem_free':
drivers/gpu/drm/nouveau/nouveau_dmem.c:103:22: warning:
variable 'drm' set but not used [-Wunused-but-set-variable]
struct nouveau_drm *drm;
^
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Linus Torvalds [Thu, 21 Mar 2019 18:48:06 +0000 (11:48 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
"Mostly fixes apart from the kprobe blacklist checking which was
deferred because of conflicting with a fix merged after I pinned the
arm64 for-next/core branch (
f2b3d8566d81 "arm64: kprobe: Always
blacklist the KVM world-switch code").
Summary:
- Update the kprobe blacklist checking for arm64. This was supposed
to be queued during the merging window but, due to conflicts, it
was deferred post -rc1
- Extend the Fujitsu erratum 010001 workaround to A64FX v1r0
- Whitelist HiSilicon Taishan v110 CPUs as not susceptible to
Meltdown
- Export save_stack_trace_regs()
- Remove obsolete selection of MULTI_IRQ_HANDLER"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: remove obsolete selection of MULTI_IRQ_HANDLER
arm64: kpti: Whitelist HiSilicon Taishan v110 CPUs
arm64: Add MIDR encoding for HiSilicon Taishan CPUs
arm64/stacktrace: Export save_stack_trace_regs()
arm64: apply workaround on A64FX v1r0
arm64: kprobes: Use arch_populate_kprobe_blacklist()
arm64: kprobes: Move exception_text check in blacklist
arm64: kprobes: Remove unneeded RODATA check
arm64: kprobes: Move extable address check into arch_prepare_kprobe()
Linus Torvalds [Thu, 21 Mar 2019 18:12:56 +0000 (11:12 -0700)]
Merge tag 'selinux-pr-
20190321' of git://git./linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"Another small SELinux fix for v5.1"
* tag 'selinux-pr-
20190321' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: fix NULL dereference in policydb_destroy()
Linus Torvalds [Thu, 21 Mar 2019 17:31:55 +0000 (10:31 -0700)]
Merge tag 'fixes_for_v5.1-rc2' of git://git./linux/kernel/git/jack/linux-fs
Pull udf fixes from Jan Kara:
"Two udf error handling fixes"
* tag 'fixes_for_v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf: Propagate errors from udf_truncate_extents()
udf: Fix crash on IO error during truncate
Linus Torvalds [Thu, 21 Mar 2019 17:24:00 +0000 (10:24 -0700)]
Merge tag 'fsnotify_for_v5.1-rc2' of git://git./linux/kernel/git/jack/linux-fs
Pull fsnotify fixes from Jan Kara:
"One inotify and one fanotify fix"
* tag 'fsnotify_for_v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fanotify: Allow copying of file handle to userspace
inotify: Fix fsnotify_mark refcount leak in inotify_update_existing_watch()