drm/i915/gvt: handle force-nonpriv registers, cmd parser part

this patch adds force non-priv registers check in LRI cmds handler

v4:
transform is_force_nonpriv_mmio() from macro to inline fuction to eliminate
checkpatch warning

v3:
per zhenyu's comment, fix some style warnings

v2:
per zhenyu's comment, refine the code to remove cascaded ifs

Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Zhao Yan 2017-03-09 10:09:44 +08:00 committed by Zhenyu Wang
parent 6aef660370
commit 4938ca9016
3 changed files with 43 additions and 0 deletions

View File

@ -817,6 +817,25 @@ static bool is_shadowed_mmio(unsigned int offset)
return ret;
}
static inline bool is_force_nonpriv_mmio(unsigned int offset)
{
return (offset >= 0x24d0 && offset < 0x2500);
}
static int force_nonpriv_reg_handler(struct parser_exec_state *s,
unsigned int offset, unsigned int index)
{
struct intel_gvt *gvt = s->vgpu->gvt;
unsigned int data = cmd_val(s, index + 1);
if (!intel_gvt_in_force_nonpriv_whitelist(gvt, data)) {
gvt_err("Unexpected forcenonpriv 0x%x LRI write, value=0x%x\n",
offset, data);
return -EINVAL;
}
return 0;
}
static int cmd_reg_handler(struct parser_exec_state *s,
unsigned int offset, unsigned int index, char *cmd)
{
@ -841,6 +860,10 @@ static int cmd_reg_handler(struct parser_exec_state *s,
return 0;
}
if (is_force_nonpriv_mmio(offset) &&
force_nonpriv_reg_handler(s, offset, index))
return -EINVAL;
if (offset == i915_mmio_reg_offset(DERRMR) ||
offset == i915_mmio_reg_offset(FORCEWAKE_MT)) {
/* Writing to HW VGT_PVINFO_PAGE offset will be discarded */

View File

@ -2988,3 +2988,20 @@ int intel_vgpu_default_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
write_vreg(vgpu, offset, p_data, bytes);
return 0;
}
/**
* intel_gvt_in_force_nonpriv_whitelist - if a mmio is in whitelist to be
* force-nopriv register
*
* @gvt: a GVT device
* @offset: register offset
*
* Returns:
* True if the register is in force-nonpriv whitelist;
* False if outside;
*/
bool intel_gvt_in_force_nonpriv_whitelist(struct intel_gvt *gvt,
unsigned int offset)
{
return in_whitelist(offset);
}

View File

@ -107,4 +107,7 @@ int intel_vgpu_default_mmio_read(struct intel_vgpu *vgpu, unsigned int offset,
void *p_data, unsigned int bytes);
int intel_vgpu_default_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
void *p_data, unsigned int bytes);
bool intel_gvt_in_force_nonpriv_whitelist(struct intel_gvt *gvt,
unsigned int offset);
#endif