From fdb468ba5131b788193479fce17e37f5fccf8f00 Mon Sep 17 00:00:00 2001
From: Bokun Zhang <Bokun.Zhang@amd.com>
Date: Thu, 16 Dec 2021 15:09:41 -0500
Subject: drm/amdgpu: Filter security violation registers
Git-commit: b18ff6925d84492d845debe2dbb81122b1d141fa
Patch-mainline: v5.17-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
Recently, there is security policy update under SRIOV.
We need to filter the registers that hit the violation
and move the code to the host driver side so that
the guest driver can execute correctly.
Signed-off-by: Bokun Zhang <Bokun.Zhang@amd.com>
Reviewed-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/sdma_v5_2.c | 83 ++++++++++++++------------
1 file changed, 46 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index 4f546f632223..d3d6d5b045b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -542,9 +542,6 @@ static void sdma_v5_2_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
}
for (i = 0; i < adev->sdma.num_instances; i++) {
- f32_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL));
- f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
- AUTO_CTXSW_ENABLE, enable ? 1 : 0);
if (enable && amdgpu_sdma_phase_quantum) {
WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_PHASE0_QUANTUM),
phase_quantum);
@@ -553,7 +550,13 @@ static void sdma_v5_2_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_PHASE2_QUANTUM),
phase_quantum);
}
- WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL), f32_cntl);
+
+ if (!amdgpu_sriov_vf(adev)) {
+ f32_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL));
+ f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
+ AUTO_CTXSW_ENABLE, enable ? 1 : 0);
+ WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL), f32_cntl);
+ }
}
}
@@ -576,10 +579,12 @@ static void sdma_v5_2_enable(struct amdgpu_device *adev, bool enable)
sdma_v5_2_rlc_stop(adev);
}
- for (i = 0; i < adev->sdma.num_instances; i++) {
- f32_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_F32_CNTL));
- f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_F32_CNTL, HALT, enable ? 0 : 1);
- WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_F32_CNTL), f32_cntl);
+ if (!amdgpu_sriov_vf(adev)) {
+ for (i = 0; i < adev->sdma.num_instances; i++) {
+ f32_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_F32_CNTL));
+ f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_F32_CNTL, HALT, enable ? 0 : 1);
+ WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_F32_CNTL), f32_cntl);
+ }
}
}
@@ -608,7 +613,8 @@ static int sdma_v5_2_gfx_resume(struct amdgpu_device *adev)
ring = &adev->sdma.instance[i].ring;
wb_offset = (ring->rptr_offs * 4);
- WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_SEM_WAIT_FAIL_TIMER_CNTL), 0);
+ if (!amdgpu_sriov_vf(adev))
+ WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_SEM_WAIT_FAIL_TIMER_CNTL), 0);
/* Set ring buffer size in dwords */
rb_bufsz = order_base_2(ring->ring_size / 4);
@@ -683,32 +689,34 @@ static int sdma_v5_2_gfx_resume(struct amdgpu_device *adev)
sdma_v5_2_ring_set_wptr(ring);
/* set minor_ptr_update to 0 after wptr programed */
- WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_MINOR_PTR_UPDATE), 0);
- /* set utc l1 enable flag always to 1 */
- temp = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL));
- temp = REG_SET_FIELD(temp, SDMA0_CNTL, UTC_L1_ENABLE, 1);
-
- /* enable MCBP */
- temp = REG_SET_FIELD(temp, SDMA0_CNTL, MIDCMD_PREEMPT_ENABLE, 1);
- WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL), temp);
-
- /* Set up RESP_MODE to non-copy addresses */
- temp = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_CNTL));
- temp = REG_SET_FIELD(temp, SDMA0_UTCL1_CNTL, RESP_MODE, 3);
- temp = REG_SET_FIELD(temp, SDMA0_UTCL1_CNTL, REDO_DELAY, 9);
- WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_CNTL), temp);
-
- /* program default cache read and write policy */
- temp = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_PAGE));
- /* clean read policy and write policy bits */
- temp &= 0xFF0FFF;
- temp |= ((CACHE_READ_POLICY_L2__DEFAULT << 12) |
- (CACHE_WRITE_POLICY_L2__DEFAULT << 14) |
- SDMA0_UTCL1_PAGE__LLC_NOALLOC_MASK);
- WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_PAGE), temp);
+ WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_MINOR_PTR_UPDATE), 0);
+ /* SRIOV VF has no control of any of registers below */
if (!amdgpu_sriov_vf(adev)) {
+ /* set utc l1 enable flag always to 1 */
+ temp = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL));
+ temp = REG_SET_FIELD(temp, SDMA0_CNTL, UTC_L1_ENABLE, 1);
+
+ /* enable MCBP */
+ temp = REG_SET_FIELD(temp, SDMA0_CNTL, MIDCMD_PREEMPT_ENABLE, 1);
+ WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_CNTL), temp);
+
+ /* Set up RESP_MODE to non-copy addresses */
+ temp = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_CNTL));
+ temp = REG_SET_FIELD(temp, SDMA0_UTCL1_CNTL, RESP_MODE, 3);
+ temp = REG_SET_FIELD(temp, SDMA0_UTCL1_CNTL, REDO_DELAY, 9);
+ WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_CNTL), temp);
+
+ /* program default cache read and write policy */
+ temp = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_PAGE));
+ /* clean read policy and write policy bits */
+ temp &= 0xFF0FFF;
+ temp |= ((CACHE_READ_POLICY_L2__DEFAULT << 12) |
+ (CACHE_WRITE_POLICY_L2__DEFAULT << 14) |
+ SDMA0_UTCL1_PAGE__LLC_NOALLOC_MASK);
+ WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_UTCL1_PAGE), temp);
+
/* unhalt engine */
temp = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_F32_CNTL));
temp = REG_SET_FIELD(temp, SDMA0_F32_CNTL, HALT, 0);
@@ -1436,13 +1444,14 @@ static int sdma_v5_2_set_trap_irq_state(struct amdgpu_device *adev,
enum amdgpu_interrupt_state state)
{
u32 sdma_cntl;
-
u32 reg_offset = sdma_v5_2_get_reg_offset(adev, type, mmSDMA0_CNTL);
- sdma_cntl = RREG32(reg_offset);
- sdma_cntl = REG_SET_FIELD(sdma_cntl, SDMA0_CNTL, TRAP_ENABLE,
- state == AMDGPU_IRQ_STATE_ENABLE ? 1 : 0);
- WREG32(reg_offset, sdma_cntl);
+ if (!amdgpu_sriov_vf(adev)) {
+ sdma_cntl = RREG32(reg_offset);
+ sdma_cntl = REG_SET_FIELD(sdma_cntl, SDMA0_CNTL, TRAP_ENABLE,
+ state == AMDGPU_IRQ_STATE_ENABLE ? 1 : 0);
+ WREG32(reg_offset, sdma_cntl);
+ }
return 0;
}
--
2.38.1