lkml.org 
[lkml]   [2022]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/4] x86/hyperv: Add missing ARCH_HAS_CC_PLATFORM dependency
On Tue, Feb 22, 2022 at 09:57:37PM +0300, Kirill A. Shutemov wrote:
> On x86, cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT) supposes to return
> true for HyperV if isolation is supported. But it only does it if the
> kernel is compiled with AMD_MEM_ENCRYPT enabled.
>
> It happens due to missed ARCH_HAS_CC_PLATFORM dependency. Without
> ARCH_HAS_CC_PLATFORM enabled, cc_platform_has() always returns false.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: "K. Y. Srinivasan" <kys@microsoft.com>
> Cc: Haiyang Zhang <haiyangz@microsoft.com>
> Cc: Stephen Hemminger <sthemmin@microsoft.com>
> Cc: Wei Liu <wei.liu@kernel.org>
> Cc: Dexuan Cui <decui@microsoft.com>
> Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>
> ---
> drivers/hv/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
> index 0747a8f1fcee..424d3f0751dc 100644
> --- a/drivers/hv/Kconfig
> +++ b/drivers/hv/Kconfig
> @@ -8,6 +8,7 @@ config HYPERV
> || (ARM64 && !CPU_BIG_ENDIAN))
> select PARAVIRT
> select X86_HV_CALLBACK_VECTOR if X86
> + select ARCH_HAS_CC_PLATFORM if x86
> select VMAP_PFN
> help
> Select this option to run Linux as a Hyper-V client operating
> --

Good catch.

I'm guessing this needs

Fixes: c789b90a6904 ("x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()")

which added hyperv_cc_platform_has() and which needs to go to Linus now,
as an urgent fix for 5.17 as that patch came into 5.17-rc1.

Wei?

--
Regards/Gruss,
Boris.

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

\
 
 \ /
  Last update: 2022-02-22 21:09    [W:0.292 / U:0.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site