On Wed, 14 Apr 2021, Zhenyu Wang wrote:
On BDW new Windows driver has brought extra registers to handle for
LRM/LRR command in WA ctx. Add allowed registers in cmd parser for BDW.
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Cc: Yan Zhao <yan.y.zhao@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 73a37a43d1b0 ("drm/i915/gvt: filter cmds "lrr-src" and "lrr-dst" in cmd_handler")
Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gvt/cmd_parser.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index fef1e857cefc..01c1d1b36acd 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -916,19 +916,26 @@ static int cmd_reg_handler(struct parser_exec_state *s,
if (!strncmp(cmd, "srm", 3) ||
!strncmp(cmd, "lrm", 3)) {
- if (offset != i915_mmio_reg_offset(GEN8_L3SQCREG4) &&
- offset != 0x21f0) {
+ if (offset == i915_mmio_reg_offset(GEN8_L3SQCREG4) ||
+ offset == 0x21f0 ||
+ (IS_BROADWELL(gvt->gt->i915) &&
+ offset == i915_mmio_reg_offset(INSTPM)))
+ return 0;
+ else {
gvt_vgpu_err("%s access to register (%x)\n",
cmd, offset);
return -EPERM;
- } else
- return 0;
+ }
}
if (!strncmp(cmd, "lrr-src", 7) ||
!strncmp(cmd, "lrr-dst", 7)) {
- gvt_vgpu_err("not allowed cmd %s\n", cmd);
- return -EPERM;
+ if (IS_BROADWELL(gvt->gt->i915) && offset == 0x215c)
+ return 0;
+ else {
+ gvt_vgpu_err("not allowed cmd %s reg (%x)\n", cmd, offset);
+ return -EPERM;
+ }
}
if (!strncmp(cmd, "pipe_ctrl", 9)) {
--
2.31.0
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Reviewed-by: Colin Xu <colin.xu@xxxxxxxxx>
Thanks for the timely fix for BDW!
