Messages in this thread | | | From | Jim Mattson <> | Date | Wed, 21 Feb 2018 15:49:59 -0800 | Subject | Re: [PATCH 1/3] KVM: x86: use native MSR ops for SPEC_CTRL |
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On Wed, Feb 21, 2018 at 1:41 PM, Paolo Bonzini <pbonzini@redhat.com> wrote: > Having a paravirt indirect call in the IBRS restore path is not a > good idea, since we are trying to protect from speculative execution > of bogus indirect branch targets. It is also slower, so use > native_wrmsrl on the vmentry path too. > > Fixes: d28b387fb74da95d69d2615732f50cceb38e9a4d > Cc: x86@kernel.org > Cc: Radim Krčmář <rkrcmar@redhat.com> > Cc: KarimAllah Ahmed <karahmed@amazon.de> > Cc: David Woodhouse <dwmw@amazon.co.uk> > Cc: Jim Mattson <jmattson@google.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Ingo Molnar <mingo@kernel.org> > Cc: stable@vger.kernel.org > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Seems like there ought to be a native_rdmsrl, but otherwise this looks fine.
Reviewed-by: Jim Mattson <jmattson@google.com>
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