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[RFC PATCH 3/5] drm/amdgpu: set passthrough mode for xen pvh/hvm
- To: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <dri-devel@xxxxxxxxxxxxxxxxxxxxx>, <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
- From: Huang Rui <ray.huang@xxxxxxx>
- Date: Sun, 12 Mar 2023 20:01:55 +0800
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- Cc: Alex Deucher <alexander.deucher@xxxxxxx>, Christian König <christian.koenig@xxxxxxx>, "Stewart Hildebrand" <Stewart.Hildebrand@xxxxxxx>, Xenia Ragiadakou <burzalodowa@xxxxxxxxx>, Honglei Huang <honglei1.huang@xxxxxxx>, Julia Zhang <julia.zhang@xxxxxxx>, Chen Jiqian <Jiqian.Chen@xxxxxxx>, Huang Rui <ray.huang@xxxxxxx>
- Delivery-date: Sun, 12 Mar 2023 12:02:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
There is an second stage translation between the guest machine address
and host machine address in Xen PVH/HVM. The PCI bar address in the xen
guest kernel are not translated at the second stage on Xen PVH/HVM, so
it's not the real physical address that hardware would like to know, so
we need to set passthrough mode for Xen PVH/HVM as well.
Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index f2e2cbaa7fde..7b4369eba19d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -743,7 +743,8 @@ void amdgpu_detect_virtualization(struct amdgpu_device
*adev)
if (!reg) {
/* passthrough mode exclus sriov mod */
- if (is_virtual_machine() && !xen_initial_domain())
+ if (is_virtual_machine() &&
+ !(xen_initial_domain() && xen_pv_domain()))
adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
}
--
2.25.1
|
