KVM: SVM: Implement VIRT_SPEC_CTRL support for SSBD

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commit bc226f07dc upstream

Expose the new virtualized architectural mechanism, VIRT_SSBD, for using
speculative store bypass disable (SSBD) under SVM.  This will allow guests
to use SSBD on hardware that uses non-architectural mechanisms for enabling
SSBD.

[ tglx: Folded the migration fixup from Paolo Bonzini ]

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Tom Lendacky 2018-05-10 22:06:39 +02:00 • committed by Greg Kroah-Hartman

parent 3f44c1a3c2

commit e8837f0a00

6 changed files with 50 additions and 18 deletions

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2

arch/x86/include/asm/kvm_host.h

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arch/x86/kernel/cpu/common.c

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11

arch/x86/kvm/cpuid.c

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arch/x86/kvm/svm.c

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arch/x86/kvm/vmx.c

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arch/x86/kvm/x86.c

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