From 0dd88c8282a4f2cfb23ba730fae9872564cb85d7 Mon Sep 17 00:00:00 2001
From: Victor Zhao <Victor.Zhao@amd.com>
Date: Mon, 24 Jan 2022 12:13:58 +0800
Subject: drm/amdgpu: add determine passthrough under arm64
Git-commit: 039cacd2393971fe11f855118eea6c83c8f506fa
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

add determine for passthrough mode under arm64 by reading
CurrentEL register

v2: squash in warning fix (Alex)

Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index c5edd84c1c12..645093610aa0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -294,8 +294,10 @@ struct amdgpu_video_codec_info;
 
 static inline bool is_virtual_machine(void)
 {
-#ifdef CONFIG_X86
+#if defined(CONFIG_X86)
 	return boot_cpu_has(X86_FEATURE_HYPERVISOR);
+#elif defined(CONFIG_ARM64)
+	return !is_kernel_in_hyp_mode();
 #else
 	return false;
 #endif
-- 
2.38.1