Re: [PATCH v2 0/6] KVM: arm64: pvtime: Fixes and a new cap

[Steven Price <steven.price@arm.com>]

On 04/08/2020 18:05, Andrew Jones wrote:
> v2:
>    - ARM_SMCCC_HV_PV_TIME_FEATURES now also returns SMCCC_RET_NOT_SUPPORTED
>      when steal time is not supported
>    - Added READ_ONCE() for the run_delay read
>    - Reworked kvm_put/get_guest to not require type as a parameter
>    - Added some more text to the documentation for KVM_CAP_STEAL_TIME
>    - Enough changed that I didn't pick up Steven's r-b's

Feel free to add my r-b's - the changes all look fine to me.

Thanks,

Steve

> 
> The first four patches in the series are fixes that come from testing
> and reviewing pvtime code while writing the QEMU support[*]. The last
> patch is only a convenience for userspace, and I wouldn't be heartbroken
> if it wasn't deemed worth it. The QEMU patches are currently written
> without the cap. However, if the cap is accepted, then I'll change the
> QEMU code to use it.
> 
> Thanks,
> drew
> 
> [*] https://lists.gnu.org/archive/html/qemu-devel/2020-07/msg03856.html
>      (a v2 of this series will also be posted shortly)
> 
> Andrew Jones (6):
>    KVM: arm64: pvtime: steal-time is only supported when configured
>    KVM: arm64: pvtime: Fix potential loss of stolen time
>    KVM: arm64: Drop type input from kvm_put_guest
>    KVM: arm64: pvtime: Fix stolen time accounting across migration
>    KVM: Documentation: Minor fixups
>    arm64/x86: KVM: Introduce steal-time cap
> 
>   Documentation/virt/kvm/api.rst    | 22 ++++++++++++++++++----
>   arch/arm64/include/asm/kvm_host.h |  2 +-
>   arch/arm64/kvm/arm.c              |  3 +++
>   arch/arm64/kvm/pvtime.c           | 29 +++++++++++++----------------
>   arch/x86/kvm/x86.c                |  3 +++
>   include/linux/kvm_host.h          | 31 ++++++++++++++++++++++++++-----
>   include/uapi/linux/kvm.h          |  1 +
>   7 files changed, 65 insertions(+), 26 deletions(-)
> 

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