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Date: Wed, 30 Nov 2016 12:22:00 +0100 From: Paolo Bonzini <pbonzini@...hat.com> To: David Matlack <dmatlack@...gle.com>, kvm@...r.kernel.org Cc: linux-kernel@...r.kernel.org, jmattson@...gle.com, rkrcmar@...hat.com Subject: Re: [PATCH v3 0/5] VMX Capability MSRs On 30/11/2016 03:14, David Matlack wrote: > This patchset adds support setting the VMX capability MSRs from userspace. > This is required for migration of nested-capable VMs to different CPUs and > KVM versions. > > Patch 1 generates the non-true VMX MSRs using the true MSRs, which allows > userspace to skip restoring them. > > Patch 2 adds support for restoring the VMX capability MSRs. > > Patches 3 and 4 make KVM's emulation of MSR_IA32_VMX_CR{0,4}_FIXED1 more > accurate. > > Patch 5 fixes a bug in emulated VM-entry that came up when testing patches > 3 and 4. > > Changes since v2: > * Generate CR0_FIXED1 in addition to CR4_FIXED1 > * Generate "non-true" capability MSRs from the "true" versions and remove > "non-true" MSRs from struct nested_vmx. > * Disallow restore of CR{0,4}_FIXED1 and "non-true" MSRs since they are > generated. > > Changes since v1: > * Support restoring less-capable versions of MSR_IA32_VMX_BASIC, > MSR_IA32_VMX_CR{0,4}_FIXED{0,1}. > * Include VMX_INS_OUTS in MSR_IA32_VMX_BASIC initial value. > > David Matlack (5): > KVM: nVMX: generate non-true VMX MSRs based on true versions > KVM: nVMX: support restore of VMX capability MSRs > KVM: nVMX: fix checks on CR{0,4} during virtual VMX operation > KVM: nVMX: generate MSR_IA32_CR{0,4}_FIXED1 from guest CPUID > KVM: nVMX: load GUEST_EFER after GUEST_CR0 during emulated VM-entry > > arch/x86/include/asm/vmx.h | 31 +++ > arch/x86/kvm/vmx.c | 479 +++++++++++++++++++++++++++++++++++++-------- > 2 files changed, 427 insertions(+), 83 deletions(-) Just a small nit that can be fixed on applying. Thanks! Paolo
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