From a5e0acea9ed644d622281a4a8fde94a2e24ec7e8 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Fri, 23 Feb 2018 07:57:33 +0000 Subject: [PATCH] KVM: s390: add exit io request stats and simplify code We want to count IO exit requests in kvm_stat. At the same time we can get rid of the handle_noop function. Reviewed-by: David Hildenbrand Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/intercept.c | 17 ++++------------- arch/s390/kvm/kvm-s390.c | 1 + 3 files changed, 6 insertions(+), 13 deletions(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 27918b15a8ba..22615af0b6e6 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -294,6 +294,7 @@ struct kvm_vcpu_stat { u64 exit_userspace; u64 exit_null; u64 exit_external_request; + u64 exit_io_request; u64 exit_external_interrupt; u64 exit_stop_request; u64 exit_validity; diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 07c6e81163bf..a389fa85cca2 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -50,18 +50,6 @@ u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu) return ilen; } -static int handle_noop(struct kvm_vcpu *vcpu) -{ - switch (vcpu->arch.sie_block->icptcode) { - case 0x10: - vcpu->stat.exit_external_request++; - break; - default: - break; /* nothing */ - } - return 0; -} - static int handle_stop(struct kvm_vcpu *vcpu) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; @@ -465,8 +453,11 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) switch (vcpu->arch.sie_block->icptcode) { case ICPT_EXTREQ: + vcpu->stat.exit_external_request++; + return 0; case ICPT_IOREQ: - return handle_noop(vcpu); + vcpu->stat.exit_io_request++; + return 0; case ICPT_INST: rc = handle_instruction(vcpu); break; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 957be1c51a4b..41adcfe169a9 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -64,6 +64,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "exit_validity", VCPU_STAT(exit_validity) }, { "exit_stop_request", VCPU_STAT(exit_stop_request) }, { "exit_external_request", VCPU_STAT(exit_external_request) }, + { "exit_io_request", VCPU_STAT(exit_io_request) }, { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, { "exit_instruction", VCPU_STAT(exit_instruction) }, { "exit_pei", VCPU_STAT(exit_pei) }, -- 2.30.2