drm/amdgpu: disallow direct upload save restore list from gfx driver

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Direct uploading save/restore list via mmio register writes breaks the security
policy. Instead, the driver should pass s&r list to psp.

For all the ASICs that use rlc v2_1 headers, the driver actually upload s&r list
twice, in non-psp ucode front door loading phase and gfx pg initialization phase.
The latter is not allowed.

VG12 is the only exception where the driver still keeps legacy approach for S&R
list uploading. In theory, this can be elimnated if we have valid srcntl ucode
for VG12.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Candice Li <Candice.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Hawking Zhang 2019-11-04 16:20:06 +08:00 • committed by Alex Deucher

parent d7c5782acd

commit 58f46d4b65

1 changed files with 2 additions and 1 deletions

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drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

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