Messages in this thread |  | | From | KarimAllah Ahmed <> | Subject | [PATCH v2 0/4] KVM: Expose speculation control feature to guests | Date | Mon, 29 Jan 2018 01:58:48 +0100 |
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Add direct access to speculation control MSRs for KVM guests. This allows the guest to protect itself against Spectre V2 using IBRS+IBPB instead of a retpoline+IBPB based approach.
It also exposes the ARCH_CAPABILITIES MSR which is going to be used by future Intel processors to indicate RDCL_NO and IBRS_ALL.
Ashok Raj (1): x86/kvm: Add IBPB support
KarimAllah Ahmed (3): x86: kvm: Update the reverse_cpuid list to include CPUID_7_EDX x86: vmx: Allow direct access to MSR_IA32_SPEC_CTRL x86: vmx: Allow direct access to MSR_IA32_ARCH_CAPABILITIES
arch/x86/kvm/cpuid.c | 6 ++++- arch/x86/kvm/cpuid.h | 1 + arch/x86/kvm/svm.c | 14 +++++++++++ arch/x86/kvm/vmx.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 1 + 5 files changed, 92 insertions(+), 1 deletion(-)
Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Jun Nakajima <jun.nakajima@intel.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: x86@kernel.org
-- 2.7.4
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