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drm/i915/gvt: filter cmds "srm" and "lrm" in cmd_handler

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do not allow "srm" and "lrm" except for GEN8_L3SQCREG4 and 0x21f0.

Cc: Colin Xu <colin.xu@intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20201223034508.17031-1-yan.y.zhao@intel.com
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Yan Zhao
2020-12-23 11:45:08 +08:00
committed by Zhenyu Wang
parent 3c4f2120d8
commit f18d417a57
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/gvt/cmd_parser.c
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@@ -982,6 +982,17 @@ static int cmd_reg_handler(struct parser_exec_state *s,
patch_value(s, cmd_ptr(s, index), VGT_PVINFO_PAGE);
}
if (!strncmp(cmd, "srm", 3) ||
!strncmp(cmd, "lrm", 3)) {
if (offset != i915_mmio_reg_offset(GEN8_L3SQCREG4) &&
offset != 0x21f0) {
gvt_vgpu_err("%s access to register (%x)\n",
cmd, offset);
return -EPERM;
} else
return 0;
}
if (is_cmd_update_pdps(offset, s) &&
cmd_pdp_mmio_update_handler(s, offset, index))
return -EINVAL;