Messages in this thread | | | Date | Fri, 2 Feb 2018 13:02:53 -0500 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [PATCH v6 5/5] KVM: SVM: Allow direct access to MSR_IA32_SPEC_CTRL |
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On Thu, Feb 01, 2018 at 10:59:46PM +0100, KarimAllah Ahmed wrote: > [ Based on a patch from Paolo Bonzini <pbonzini@redhat.com> ] > > ... basically doing exactly what we do for VMX: > > - Passthrough SPEC_CTRL to guests (if enabled in guest CPUID) > - Save and restore SPEC_CTRL around VMExit and VMEntry only if the guest > actually used it. > > Cc: Asit Mallick <asit.k.mallick@intel.com> > Cc: Arjan Van De Ven <arjan.van.de.ven@intel.com> > Cc: Dave Hansen <dave.hansen@intel.com> > Cc: Andi Kleen <ak@linux.intel.com> > Cc: Andrea Arcangeli <aarcange@redhat.com> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Tim Chen <tim.c.chen@linux.intel.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Dan Williams <dan.j.williams@intel.com> > Cc: Jun Nakajima <jun.nakajima@intel.com> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: David Woodhouse <dwmw@amazon.co.uk> > Cc: Greg KH <gregkh@linuxfoundation.org> > Cc: Andy Lutomirski <luto@kernel.org> > Cc: Ashok Raj <ashok.raj@intel.com> > Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> > + { .index = MSR_IA32_SPEC_CTRL, .always = false },
This .always = [false|true] field keeps throwing me off.
So glad: https://www.spinics.net/lists/kvm/msg161606.html explains it better.
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