[MODERATED] Re: [PATCH v2.1 0/6] On top of Thomas+Paolo's

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

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On Wed, Jun 20, 2018 at 04:42:56PM -0400, speck for konrad.wilk_at_oracle.com wrote:
> Hey,
> 
> This patchset replaces Paolo's second patch but also adds the warnings
> that Linus wanted. Along with some extra knobs in case the MSR will
> have more things in the future.
> 
> Oh, and one bug-fix.
> 
> I am also working on using the VMX Load MSR list so that the L1D flush
> happens automatically on VMENTER.

Done.

Attached is the git bundle of the patches that were posted and also
code to do L1D flush using the VMX load MSR list. 

I can most certainly post it, but I hadn't run any performance numbers
so not sure if that approach is even worth it or not.

> 
> 
> Konrad Rzeszutek Wilk (5):
>       x86/bugs: Move the l1tf function and define pr_fmt properly
>       x86/cpufeatures: Add detection of L1D cache flush support.
>       x86/bugs: Read FLUSH_CMD MSR during boot.
>       x86/KVM: Warn user if KVM is loaded SMT and L1TF CPU bug being present.
>       x86/KVM: Use L1 cache flush before VMENTER if available.
> 
> Paolo Bonzini (1):
>       kvm: x86: mitigation for L1 cache terminal fault vulnerabilities
> 
>  Documentation/admin-guide/kernel-parameters.txt |  4 ++
>  arch/x86/include/asm/cpu.h                      |  4 ++
>  arch/x86/include/asm/cpufeatures.h              |  1 +
>  arch/x86/include/asm/kvm_host.h                 |  7 ++-
>  arch/x86/include/asm/msr-index.h                |  6 ++
>  arch/x86/kernel/cpu/bugs.c                      | 83 +++++++++++++++++--------
>  arch/x86/kvm/mmu.c                              |  1 +
>  arch/x86/kvm/svm.c                              |  3 +-
>  arch/x86/kvm/vmx.c                              | 46 +++++++++++++-
>  arch/x86/kvm/x86.c                              | 80 +++++++++++++++++++++++-
>  kernel/cpu.c                                    |  1 +
>  11 files changed, 205 insertions(+), 31 deletions(-)

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