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x86/kvm: RCU/context tracking and instrumentation protections

Thomas Gleixner kvm lkml 2 versions – Applied

Status from this message: Queued, thanks.

Get series with b4
b4 am [email protected]

Versions newest first · linked by author and title

  1. v2 Latest7 patches 2 repliesApplied
  2. v17 patches 1 replySuperseded

Patches in v2 Applied

#Subject and filesSizeRepliesApplied
1/7x86/kvm: Move context tracking where it belongsarch/x86/kvm/svm/svm.c arch/x86/kvm/vmx/vmx.c arch/x86/kvm/x86.c+26 -20 replies
2/7x86/kvm/vmx: Add hardirq tracing to guest enter/exitarch/x86/kvm/vmx/vmx.c+25 -20 replies
3/7x86/kvm/svm: Add hardirq tracing on guest enter/exitarch/x86/kvm/svm/svm.c+22 -50 replies
4/7x86/kvm/vmx: Move guest enter/exit into .noinstr.textarch/x86/include/asm/hardirq.h arch/x86/include/asm/kvm_host.h arch/x86/kvm/vmx/ops.h +3 more+81 -530 replies
5/7x86/kvm/svm: Move guest enter/exit into .noinstr.textarch/x86/kvm/svm/svm.c arch/x86/kvm/svm/vmenter.S+56 -440 replies
6/7x86/kvm/svm: Use uninstrumented wrmsrl() to restore GSarch/x86/kvm/svm/svm.c+1 -10 replies
7/7x86/kvm/vmx: Use native read/write_cr2()arch/x86/kvm/vmx/vmx.c+3 -31 reply

Reviews trailers per patch

All 7 patches have a Reviewed-by or Acked-by.

PatchAlexandre ChartrePeter ZijlstraPaolo BonziniJuergen Gross
1/7R-b A-b A-b
2/7R-b A-b A-b
3/7R-b A-b A-b
4/7R-b A-b A-b
5/7R-b A-b A-b
6/7A-b
7/7R-b

Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes. Scroll the table sideways for all 4 reviewers.

Read the v2 thread

Cover letter [patch V2 0/7] x86/kvm: RCU/context tracking and instrumentation protections

Folks,

this is a rebased and adopted version of the original series which is available here:

     https://lore.kernel.org/r/[email protected]

It deals with the RCU and context tracking state and the protection against instrumentation in sensitive places:

- Placing the guest_enter/exit() calls at the correct place

- Moving the sensitive VMENTER/EXIT code into the non-instrumentable code section.

- Fixup the tracing code to comply with the non-instrumentation rules

- Use native functions to access CR2 and the GS base MSR in the critical code pathes to prevent them from being instrumented.

Thanks,

tglx

Read the cover letter in its thread