* [PATCH] drm/amdgpu: add determine passthrough under arm64
@ 2022-01-24 6:45 Victor Zhao
2022-01-24 16:53 ` Alex Deucher
0 siblings, 1 reply; 2+ messages in thread
From: Victor Zhao @ 2022-01-24 6:45 UTC (permalink / raw)
To: amd-gfx; +Cc: emily.deng, Victor Zhao
add determine for passthrough mode under arm64 by reading
CurrentEL register
Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index c5edd84c1c12..40803aab136f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -296,6 +296,8 @@ static inline bool is_virtual_machine(void)
{
#ifdef CONFIG_X86
return boot_cpu_has(X86_FEATURE_HYPERVISOR);
+#elif CONFIG_ARM64
+ return !is_kernel_in_hyp_mode();
#else
return false;
#endif
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/amdgpu: add determine passthrough under arm64
2022-01-24 6:45 [PATCH] drm/amdgpu: add determine passthrough under arm64 Victor Zhao
@ 2022-01-24 16:53 ` Alex Deucher
0 siblings, 0 replies; 2+ messages in thread
From: Alex Deucher @ 2022-01-24 16:53 UTC (permalink / raw)
To: Victor Zhao; +Cc: Emily Deng, amd-gfx list
Acked-by: Alex Deucher <alexander.deucher@amd.com>
On Mon, Jan 24, 2022 at 1:45 AM Victor Zhao <Victor.Zhao@amd.com> wrote:
>
> add determine for passthrough mode under arm64 by reading
> CurrentEL register
>
> Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> index c5edd84c1c12..40803aab136f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> @@ -296,6 +296,8 @@ static inline bool is_virtual_machine(void)
> {
> #ifdef CONFIG_X86
> return boot_cpu_has(X86_FEATURE_HYPERVISOR);
> +#elif CONFIG_ARM64
> + return !is_kernel_in_hyp_mode();
> #else
> return false;
> #endif
> --
> 2.25.1
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-01-24 16:53 ` Alex Deucher
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