Merge tag 'drm-xe-next-2024-10-10' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-next

Cross-subsystem Changes:
- Add drm_line_printer (Michal)

Driver Changes:
- Fix an UAF (Matt Auld)
- Sanity check compression and coherency mode (Matt Auld)
- Some PIC-ID work (Jani)
- Use IS_ENABLED() instead of defined() on config options.
- gt powergating work (Riana)
- Suppress missing out ter rpm protection warning (Rodrigo)
- Fix a vm leak  (Dafna)
- Clean up and update 'has_flat_ccs' handling (Lucas)
- Fix arg to pci_iomap (Lucas)
- Mark reserved engines in shapshot (Lucas)
- Don't keep stale pointer (Michal)
- Fix build warning with CONFIG_PM=n (Arnd)
- Add a xe_bo subtest for shrinking / swapping (Thomas)
- Add a warkaround (Tejas)
- Some display PM work (Maarten)
- Enable Xe2 + PES disaggregation (Ashutosh)
- Large xe_mmio rework / cleanup (Matt Roper)
- A couple of fixes / cleanups in the xe client code (Matt Auld)
- Fix page-fault handling on closed VMs  (Matt Brost)
- Fix overflow in OA batch buffer (José)
- Style fixes (Lucas, Jiapeng, Nitin)
- Fixes and new development around SRIOV (Michal)
- Use devm_add_action_or_reset() in gt code (He)
- Fix CCS offset calculation (Matt Auld)
- Remove i915_drv.h include (Rodrigo)
- Restore PCI state on resume (Rodrigo)
- Fix DSB buffer coherency / Revert DSB disabling (Maarten / Animesh)
- Convert USM lock to rwsem (Matt Brost)
- Defer gt-mmio intialization (Matt Roper)
- meemirq changes (Ilia)
- Move some PVC related code out of xe-for-CI and to the driver (Rodrigo / Jani)
- Use a helper for ASID->VM lookup (Matt Brost)
- Add new PCI id for ARL (Dnyaneshwar)
- Use Xe2_LPM steering tables for Xe2_HPM (Gustavo)
- Performance tuning work for media GT and L3 cache flushing (Gustavo)
- Clean up VM- and exec queue file lock usage (Matt Brost)
- GuC locking fix (Matt Auld)
- Fix UAF around queue destruction (Matt Auld)
- Move IRQ-related registers to dedicated header (Matt Roper)
- Resume TDR after GT reset (Matt Brost)
- Move xa_alloc to prevent UAF (Matt Auld)
- Fix OA stream close (José)
- Remove unused i915_gpu_error.h (Jani)
- Prevent null pointer access in xe_migrate_copy (Zhanjun)
- Fix memory leak when aborting binds (Matt Brost)
- Prevent UAF in send_recv() (Matt Auld)
- Fix xa_store() error checking (Matt Auld)
- drop irq disabling around xa_erase in guc code (Matt Auld)
- Use fault injection infrastructure to find issues as probe time (Francois)
- Fix a workaround implementation. (Vinay)
- Mark wedged_mode debugfs writable (Matt Roper)
- Fix for prviewous memirq work (Michal)
- More SRIOV work (Michal)
- Devcoredump work (John)
- GuC logging + devcoredump support (John)
- Don't report L3 bank availability on PTL (Shekhar)
- Replicate Xe2 PAT settings on Xe2 (Matt Roper)
- Define Xe3 feature flags (Haridhar)
- Reuse Xe2 MOCS table on on PTL (Haridhar)
- Add PTL platform definition (Haridhar)
- Add MCR steering for Xe3 (Matt)
- More work around GuC capture for devcoredump (Zhanjun)
- Improve cache flushing behaviour on bmg (Matt Auld)
- Fix shrinker test compiler warnings on 32-bit (Thomas)
- Initial set of workarounds for Xe3 (Gustavo)
- Extend workaround for xe2lpg (Aradhya)
- Fix unbalanced rpm put x 2 (Matt Auld)

Signed-off-by: Dave Airlie <airlied@redhat.com>

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# gpg: Signature made Thu 10 Oct 2024 19:53:11 AEST
# gpg:                using EDDSA key 6C91433BC35A06E6BC762193B81693550AC606BF
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# Conflicts:
#	drivers/gpu/drm/xe/xe_gt_mcr.c
#	drivers/gpu/drm/xe/xe_tuning.c
From: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Zwekwrak12c5SSgo@fedora

1 files changed, 32 insertions, 2 deletions

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index f3aee0cae6bf..c74c121ea7bb 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -283,6 +283,8 @@ struct xe_ttm_tt {
 	struct device *dev;
 	struct sg_table sgt;
 	struct sg_table *sg;
+	/** @purgeable: Whether the content of the pages of @ttm is purgeable. */
+	bool purgeable;
 };
 
 static int xe_tt_map_sg(struct ttm_tt *tt)
@@ -468,7 +470,7 @@ static int xe_ttm_io_mem_reserve(struct ttm_device *bdev,
 		mem->bus.offset += vram->io_start;
 		mem->bus.is_iomem = true;
 
-#if  !defined(CONFIG_X86)
+#if  !IS_ENABLED(CONFIG_X86)
 		mem->bus.caching = ttm_write_combined;
 #endif
 		return 0;
@@ -761,7 +763,7 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 	if (xe_rpm_reclaim_safe(xe)) {
 		/*
 		 * We might be called through swapout in the validation path of
-		 * another TTM device, so unconditionally acquire rpm here.
+		 * another TTM device, so acquire rpm here.
 		 */
 		xe_pm_runtime_get(xe);
 	} else {
@@ -1082,6 +1084,33 @@ static void xe_ttm_bo_delete_mem_notify(struct ttm_buffer_object *ttm_bo)
 	}
 }
 
+static void xe_ttm_bo_purge(struct ttm_buffer_object *ttm_bo, struct ttm_operation_ctx *ctx)
+{
+	struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev);
+
+	if (ttm_bo->ttm) {
+		struct ttm_placement place = {};
+		int ret = ttm_bo_validate(ttm_bo, &place, ctx);
+
+		drm_WARN_ON(&xe->drm, ret);
+	}
+}
+
+static void xe_ttm_bo_swap_notify(struct ttm_buffer_object *ttm_bo)
+{
+	struct ttm_operation_ctx ctx = {
+		.interruptible = false
+	};
+
+	if (ttm_bo->ttm) {
+		struct xe_ttm_tt *xe_tt =
+			container_of(ttm_bo->ttm, struct xe_ttm_tt, ttm);
+
+		if (xe_tt->purgeable)
+			xe_ttm_bo_purge(ttm_bo, &ctx);
+	}
+}
+
 const struct ttm_device_funcs xe_ttm_funcs = {
 	.ttm_tt_create = xe_ttm_tt_create,
 	.ttm_tt_populate = xe_ttm_tt_populate,
@@ -1094,6 +1123,7 @@ const struct ttm_device_funcs xe_ttm_funcs = {
 	.release_notify = xe_ttm_bo_release_notify,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.delete_mem_notify = xe_ttm_bo_delete_mem_notify,
+	.swap_notify = xe_ttm_bo_swap_notify,
 };
 
 static void xe_ttm_bo_destroy(struct ttm_buffer_object *ttm_bo)