KVM: SVM: Add fast MMIO bus writes

[PATCH 0/2] KVM: SVM: Add fast MMIO bus writes

Posted by Sean Christopherson 2 months, 3 weeks ago

Add support for expediting fast MMIO bus writes in SVM's npt_interception()
to match VMX's support in handle_ept_misconfig().

I don't recall what prompted me to write the patches; I suspect it was a
"well, why not?" situation.  They've been sitting in one of my bajillion
branches since May, and I rediscovered them while looking for something
else.

Sean Christopherson (2):
  KVM: SVM: Rename "fault_address" to "gpa" in npf_interception()
  KVM: SVM: Add support for expedited writes to the fast MMIO bus

 arch/x86/kvm/svm/svm.c | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)


base-commit: 16ec4fb4ac95d878b879192d280db2baeec43272
-- 
2.52.0.rc1.455.g30608eb744-goog

Re: [PATCH 0/2] KVM: SVM: Add fast MMIO bus writes

Posted by Sean Christopherson 3 weeks, 4 days ago

On Thu, 13 Nov 2025 14:16:40 -0800, Sean Christopherson wrote:
> Add support for expediting fast MMIO bus writes in SVM's npt_interception()
> to match VMX's support in handle_ept_misconfig().
> 
> I don't recall what prompted me to write the patches; I suspect it was a
> "well, why not?" situation.  They've been sitting in one of my bajillion
> branches since May, and I rediscovered them while looking for something
> else.
> 
> [...]

Applied to kvm-x86 svm, thanks!

[1/2] KVM: SVM: Rename "fault_address" to "gpa" in npf_interception()
      https://github.com/kvm-x86/linux/commit/737f2a382f89
[2/2] KVM: SVM: Add support for expedited writes to the fast MMIO bus
      https://github.com/kvm-x86/linux/commit/01cde4eaaeca

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https://github.com/kvm-x86/linux/tree/next