linux-kernel - [PATCH 0/3] KVM: VMX: per-VCPU MSR bitmaps

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Date:   Tue, 16 Jan 2018 17:52:22 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH 0/3] KVM: VMX: per-VCPU MSR bitmaps

This can be useful for both processor tracing and IBRS/IBPB MSRs.
MSR bitmaps are moved into struct loaded_vmcs so that we keep two separate
bitmaps for L1 and L2 guests.

The first patch introduces an auxiliary function to allocate a struct
loaded_vmcs, the second simplifies a bit the handling of the bitmaps.
The third is the main change.

I had started working on this as an urgent-ish fix for the processor
tracing patches.  At this point it's become 4.17 material, but I'm
sending it out early for Luwei to base his patches on this work.

Paolo Bonzini (3):
  KVM: VMX: introduce alloc_loaded_vmcs
  KVM: VMX: use same MSR bitmaps for 32-/64-bit modes
  KVM: VMX: make MSR bitmaps per-VCPU

 arch/x86/kvm/vmx.c | 277 +++++++++++++++++++++++++----------------------------
 1 file changed, 130 insertions(+), 147 deletions(-)

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1.8.3.1