linux-kernel - [PATCH 5.18 291/879] drm/amd/amdgpu: Only reserve vram for firmware with vega9 MS

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Message-Id: <20220607165011.294913080@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 18:56:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yongqiang Sun <yongqiang.sun@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 291/879] drm/amd/amdgpu: Only reserve vram for firmware with vega9 MS_HYPERV host.

From: Yongqiang Sun <yongqiang.sun@....com>

[ Upstream commit 49aa98ca30cd186ab33fc5802066e2024d3bfa39 ]

driver loading failed on VEGA10 SRIOV VF with linux host due to a wide
range of stolen reserved vram.
Since VEGA10 SRIOV VF need to reserve vram for firmware with windows
Hyper_V host specifically, check hypervisor type to only reserve
memory for it, and the range of the reserved vram can be limited
to between 5M-7M area.

Fixes: faad5ccac1eaae ("drm/amdgpu: Add stolen reserved memory for MI25 SRIOV.")
Signed-off-by: Yongqiang Sun <yongqiang.sun@....com>
Acked-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index a66a0881a934..3e9582c245bb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/io-64-nonatomic-lo-hi.h>
+#include <asm/hypervisor.h>
 
 #include "amdgpu.h"
 #include "amdgpu_gmc.h"
@@ -647,11 +648,11 @@ void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev)
 	case CHIP_VEGA10:
 		adev->mman.keep_stolen_vga_memory = true;
 		/*
-		 * VEGA10 SRIOV VF needs some firmware reserved area.
+		 * VEGA10 SRIOV VF with MS_HYPERV host needs some firmware reserved area.
 		 */
-		if (amdgpu_sriov_vf(adev)) {
-			adev->mman.stolen_reserved_offset = 0x100000;
-			adev->mman.stolen_reserved_size = 0x600000;
+		if (amdgpu_sriov_vf(adev) && hypervisor_is_type(X86_HYPER_MS_HYPERV)) {
+			adev->mman.stolen_reserved_offset = 0x500000;
+			adev->mman.stolen_reserved_size = 0x200000;
 		}
 		break;
 	case CHIP_RAVEN:
-- 
2.35.1