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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:30 +0000 |
commit | e54def4ad8144ab15f826416e2e0f290ef1901b4 (patch) | |
tree | 583f8d4bd95cd67c44ff37b878a7eddfca9ab97a /drivers/gpu/drm/i915/i915_utils.c | |
parent | Adding upstream version 6.8.12. (diff) | |
download | linux-e54def4ad8144ab15f826416e2e0f290ef1901b4.tar.xz linux-e54def4ad8144ab15f826416e2e0f290ef1901b4.zip |
Adding upstream version 6.9.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.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 29fd02bf5e..6f9e7b354b 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; +} |