diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:14:13 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:15:08 +0300 |
| commit | 537c2e91d3549e5d6020bb0576cf9b54a845255f (patch) | |
| tree | c09e8a1b7d733cde19b0c72678c28fb2bc97ff6b /drivers/gpu/drm/i915/i915_utils.c | |
| parent | 237bb5f7f7f55ec5f773469a974c61a49c298625 (diff) | |
| parent | cba9ffdb9913dfe6be29f049ce920ce451ce7cc4 (diff) | |
| download | linux-537c2e91d3549e5d6020bb0576cf9b54a845255f.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_utils.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.c b/drivers/gpu/drm/i915/i915_utils.c index 29fd02bf5ea8..6f9e7b354b54 100644 --- a/drivers/gpu/drm/i915/i915_utils.c +++ b/drivers/gpu/drm/i915/i915_utils.c @@ -8,6 +8,7 @@ #include <drm/drm_drv.h> #include "i915_drv.h" +#include "i915_reg.h" #include "i915_utils.h" #define FDO_BUG_MSG "Please file a bug on drm/i915; see " FDO_BUG_URL " for details." @@ -125,3 +126,19 @@ bool i915_vtd_active(struct drm_i915_private *i915) /* Running as a guest, we assume the host is enforcing VT'd */ return i915_run_as_guest(); } + +bool i915_direct_stolen_access(struct drm_i915_private *i915) +{ + /* + * Wa_22018444074 + * + * Access via BAR can hang MTL, go directly to GSM/DSM, + * except for VM guests which won't have access to it. + * + * Normally this would not work but on MTL the system firmware + * should have relaxed the access permissions sufficiently. + * 0x138914==0x1 indicates that the firmware has done its job. + */ + return IS_METEORLAKE(i915) && !i915_run_as_guest() && + intel_uncore_read(&i915->uncore, MTL_PCODE_STOLEN_ACCESS) == STOLEN_ACCESS_ALLOWED; +} |