[v2] KVM: SEV: Enable AMD SEV-ES DebugSwap

[PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap

Posted by Alexey Kardashevskiy 3 years, 4 months ago

This is to use another AMD SEV-ES hardware assisted register swap,
more detail in 2/3. The patches are fairly independend but required in
this order.

This is based on sha1 0d1409e4ff08 and requires something like this
for X86_FEATURE_NO_NESTED_DATA_BP:
https://lkml.org/lkml/2022/11/29/1229

This patchset is pushed out at
https://github.com/aik/linux/commits/debugswap


Please comment. Thanks.

btw the enormous cc: list came from get_maintainer.pl, keep it like
this or tell the script something to reduce the list?


Alexey Kardashevskiy (3):
  x86/amd: Cache values in percpu variables
  KVM: SEV: Enable data breakpoints in SEV-ES
  x86/sev: Do not handle #VC for DR7 read/write

 arch/x86/include/asm/debugreg.h        |  9 +++-
 arch/x86/include/asm/msr-index.h       |  1 +
 arch/x86/include/asm/svm.h             |  1 +
 arch/x86/kvm/svm/svm.h                 | 16 +++++--
 tools/arch/x86/include/asm/msr-index.h |  1 +
 arch/x86/kernel/cpu/amd.c              | 45 ++++++++++++++------
 arch/x86/kernel/sev.c                  |  6 +++
 arch/x86/kvm/svm/sev.c                 | 29 +++++++++++++
 arch/x86/kvm/svm/svm.c                 |  3 +-
 9 files changed, 90 insertions(+), 21 deletions(-)

-- 
2.38.1

Re: [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap

Posted by Borislav Petkov 3 years, 3 months ago

On Fri, Dec 09, 2022 at 03:38:01PM +1100, Alexey Kardashevskiy wrote:
> This is to use another AMD SEV-ES hardware assisted register swap,
> more detail in 2/3. The patches are fairly independend but required in
> this order.
> 
> This is based on sha1 0d1409e4ff08 and requires something like this
> for X86_FEATURE_NO_NESTED_DATA_BP:
> https://lkml.org/lkml/2022/11/29/1229

Please use

lore.kernel.org/r/<Message-ID>

when you want to refer to a mail on a public ML.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH kernel v2 0/3] KVM: SEV: Enable AMD SEV-ES DebugSwap

Posted by Alexey Kardashevskiy 3 years, 3 months ago


On 9/12/22 15:38, Alexey Kardashevskiy wrote:
> This is to use another AMD SEV-ES hardware assisted register swap,
> more detail in 2/3. The patches are fairly independend but required in
> this order.
> 
> This is based on sha1 0d1409e4ff08 and requires something like this
> for X86_FEATURE_NO_NESTED_DATA_BP:
> https://lkml.org/lkml/2022/11/29/1229
> 
> This patchset is pushed out at
> https://github.com/aik/linux/commits/debugswap
> 
> 
> Please comment. Thanks.

Ping? Thanks,


> 
> btw the enormous cc: list came from get_maintainer.pl, keep it like
> this or tell the script something to reduce the list?
> 
> 
> Alexey Kardashevskiy (3):
>    x86/amd: Cache values in percpu variables
>    KVM: SEV: Enable data breakpoints in SEV-ES
>    x86/sev: Do not handle #VC for DR7 read/write
> 
>   arch/x86/include/asm/debugreg.h        |  9 +++-
>   arch/x86/include/asm/msr-index.h       |  1 +
>   arch/x86/include/asm/svm.h             |  1 +
>   arch/x86/kvm/svm/svm.h                 | 16 +++++--
>   tools/arch/x86/include/asm/msr-index.h |  1 +
>   arch/x86/kernel/cpu/amd.c              | 45 ++++++++++++++------
>   arch/x86/kernel/sev.c                  |  6 +++
>   arch/x86/kvm/svm/sev.c                 | 29 +++++++++++++
>   arch/x86/kvm/svm/svm.c                 |  3 +-
>   9 files changed, 90 insertions(+), 21 deletions(-)
> 

-- 
Alexey