Re: [PATCH v2 13/13] KVM: x86: Protect pmu_intel.c from Spectre-v1/L1TF attacks

Jim Mattson
2020-01-06T20:20:07Z

On Wed, Dec 11, 2019 at 12:49 PM Marios Pomonis <pomonis@google.com> wrote:
>
> This fixes Spectre-v1/L1TF vulnerabilities in intel_find_fixed_event()
> and intel_rdpmc_ecx_to_pmc().
> kvm_rdpmc() (ancestor of intel_find_fixed_event()) and
> reprogram_fixed_counter() (ancestor of intel_rdpmc_ecx_to_pmc()) are
> exported symbols so KVM should treat them conservatively from a security
> perspective.
>
> Fixes: commit 25462f7f5295 ("KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch")
>
> Signed-off-by: Nick Finco <nifi@google.com>
> Signed-off-by: Marios Pomonis <pomonis@google.com>
> Reviewed-by: Andrew Honig <ahonig@google.com>
> Cc: stable@vger.kernel.org

Reviewed-by: Jim Mattson <jmattson@google.com>