Commit f18d417a authored Dec 23, 2020 by Yan Zhao Committed by Zhenyu Wang Dec 25, 2020

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



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>

parent 3c4f2120

drivers/gpu/drm/i915/gvt/cmd_parser.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -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;