Merge android-4.4.155 (b3f777e) into msm-4.4

* refs/heads/tmp-b3f777e
  Linux 4.4.155
  drm/drivers: add support for using the arch wc mapping API.
  x86/io: add interface to reserve io memtype for a resource range. (v1.1)
  fs/quota: Fix spectre gadget in do_quotactl
  perf auxtrace: Fix queue resize
  bcache: release dc->writeback_lock properly in bch_writeback_thread()
  getxattr: use correct xattr length
  udlfb: set optimal write delay
  fb: fix lost console when the user unplugs a USB adapter
  pwm: tiehrpwm: Fix disabling of output of PWMs
  ubifs: Fix synced_i_size calculation for xattr inodes
  ubifs: Check data node size before truncate
  Revert "UBIFS: Fix potential integer overflow in allocation"
  ubifs: Fix memory leak in lprobs self-check
  userns: move user access out of the mutex
  sys: don't hold uts_sem while accessing userspace memory
  osf_getdomainname(): use copy_to_user()
  iommu/vt-d: Fix dev iotlb pfsid use
  iommu/vt-d: Add definitions for PFSID
  mm/tlb: Remove tlb_remove_table() non-concurrent condition
  ARM: tegra: Fix Tegra30 Cardhu PCA954x reset
  pnfs/blocklayout: off by one in bl_map_stripe()
  PM / sleep: wakeup: Fix build error caused by missing SRCU support
  9p: fix multiple NULL-pointer-dereferences
  uprobes: Use synchronize_rcu() not synchronize_sched()
  kthread, tracing: Don't expose half-written comm when creating kthreads
  tracing/blktrace: Fix to allow setting same value
  tracing: Do not call start/stop() functions when tracing_on does not change
  vmw_balloon: fix VMCI use when balloon built into kernel
  vmw_balloon: VMCI_DOORBELL_SET does not check status
  vmw_balloon: do not use 2MB without batching
  vmw_balloon: fix inflation of 64-bit GFNs
  iio: ad9523: Fix return value for ad952x_store()
  iio: ad9523: Fix displayed phase
  dm cache metadata: save in-core policy_hint_size to on-disk superblock
  x86/mm/pat: Fix L1TF stable backport for CPA, 2nd call
  net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree()
  net/9p/client.c: version pointer uninitialized
  9p/virtio: fix off-by-one error in sg list bounds check
  fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
  powerpc/pseries: Fix endianness while restoring of r3 in MCE handler.
  powerpc/fadump: handle crash memory ranges array index overflow
  drm/i915/userptr: reject zero user_size
  spi: davinci: fix a NULL pointer dereference
  net: lan78xx: Fix misplaced tasklet_schedule() call
  9p/net: Fix zero-copy path in the 9p virtio transport
  net: mac802154: tx: expand tailroom if necessary
  net: 6lowpan: fix reserved space for single frames
  BACKPORT: arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW
  ANDROID: arm64: mm: fix 4.4.154 merge

Change-Id: Id5969245c97b88f9618cb6123e992ea4540ca434
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

2 files changed, 20 insertions, 4 deletions

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index e913a930ac80..5a63e32a4a6b 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1315,8 +1315,8 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
 	qi_submit_sync(&desc, iommu);
 }
 
-void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
-			u64 addr, unsigned mask)
+void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
+			u16 qdep, u64 addr, unsigned mask)
 {
 	struct qi_desc desc;
 
@@ -1331,7 +1331,7 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
 		qdep = 0;
 
 	desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) |
-		   QI_DIOTLB_TYPE;
+		   QI_DIOTLB_TYPE | QI_DEV_IOTLB_PFSID(pfsid);
 
 	qi_submit_sync(&desc, iommu);
 }
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 4efec2db4ee2..49b266433f4c 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -419,6 +419,7 @@ struct device_domain_info {
 	struct list_head global; /* link to global list */
 	u8 bus;			/* PCI bus number */
 	u8 devfn;		/* PCI devfn number */
+	u16 pfsid;		/* SRIOV physical function source ID */
 	u8 pasid_supported:3;
 	u8 pasid_enabled:1;
 	u8 pri_supported:1;
@@ -1479,6 +1480,20 @@ static void iommu_enable_dev_iotlb(struct device_domain_info *info)
 		return;
 
 	pdev = to_pci_dev(info->dev);
+	/* For IOMMU that supports device IOTLB throttling (DIT), we assign
+	 * PFSID to the invalidation desc of a VF such that IOMMU HW can gauge
+	 * queue depth at PF level. If DIT is not set, PFSID will be treated as
+	 * reserved, which should be set to 0.
+	 */
+	if (!ecap_dit(info->iommu->ecap))
+		info->pfsid = 0;
+	else {
+		struct pci_dev *pf_pdev;
+
+		/* pdev will be returned if device is not a vf */
+		pf_pdev = pci_physfn(pdev);
+		info->pfsid = PCI_DEVID(pf_pdev->bus->number, pf_pdev->devfn);
+	}
 
 #ifdef CONFIG_INTEL_IOMMU_SVM
 	/* The PCIe spec, in its wisdom, declares that the behaviour of
@@ -1537,7 +1552,8 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
 
 		sid = info->bus << 8 | info->devfn;
 		qdep = info->ats_qdep;
-		qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask);
+		qi_flush_dev_iotlb(info->iommu, sid, info->pfsid,
+				qdep, addr, mask);
 	}
 	spin_unlock_irqrestore(&device_domain_lock, flags);
 }