RE: [PATCH] drm/amdgpu: Restrict PSP OS version read to PF

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[AMD Official Use Only - General]

Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>

Regards,
Hawking
-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar@xxxxxxx>
Sent: Thursday, October 12, 2023 13:51
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Subject: [PATCH] drm/amdgpu: Restrict PSP OS version read to PF

Only physical function can read PSP OS version register on PSP v13.x SOCs.

Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/psp_v13_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
index 1997260a8156..96ea64e1bf37 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
@@ -280,6 +280,9 @@ static inline void psp_v13_0_init_sos_version(struct psp_context *psp)  {
        struct amdgpu_device *adev = psp->adev;

+       if (amdgpu_sriov_vf(adev))
+               return;
+
        psp->sos.fw_version = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_58);  }

--
2.25.1





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