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(parent: 7724397) | patch
x86/bugs: Whitelist allowed SPEC_CTRL MSR values
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thu, 26 Apr 2018 02:04:23 +0000 (22:04 -0400)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 3 May 2018 11:55:49 +0000 (13:55 +0200)
commit1115a859f33276fe8afb31c60cf9d8e657872558
treeec85ff6ac7ff25b03c8893f47a691b610f13db11tree | snapshot
parent772439717dbf703b39990be58d8d4e3e4ad0598acommit | diff
x86/bugs: Whitelist allowed SPEC_CTRL MSR values

Intel and AMD SPEC_CTRL (0x48) MSR semantics may differ in the
future (or in fact use different MSRs for the same functionality).

As such a run-time mechanism is required to whitelist the appropriate MSR
values.

[ tglx: Made the variable __ro_after_init ]

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/cpu/bugs.c diff | blob | history
John Crispins staging tree