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authorLinus Torvalds <torvalds@linux-foundation.org>2020-11-27 21:41:19 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-11-27 21:41:19 +0300
commit6adf33a5e42feada39d52eebd389d2019202e993 (patch)
treed58dc66a60e9da89a4332938e7f6362fd6a6a797 /drivers/iommu
parent43d6ecd97c0c69acffc918cc18cdabdfcaa55354 (diff)
parentd76b42e92780c3587c1a998a3a943b501c137553 (diff)
downloadlinux-6adf33a5e42feada39d52eebd389d2019202e993.tar.xz
Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull iommu fixes from Will Deacon: "Here's another round of IOMMU fixes for -rc6 consisting mainly of a bunch of independent driver fixes. Thomas agreed for me to take the x86 'tboot' fix here, as it fixes a regression introduced by a vt-d change. - Fix intel iommu driver when running on devices without VCCAP_REG - Fix swiotlb and "iommu=pt" interaction under TXT (tboot) - Fix missing return value check during device probe() - Fix probe ordering for Qualcomm SMMU implementation - Ensure page-sized mappings are used for AMD IOMMU buffers with SNP RMP" * tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: iommu/vt-d: Don't read VCCAP register unless it exists x86/tboot: Don't disable swiotlb when iommu is forced on iommu: Check return of __iommu_attach_device() arm-smmu-qcom: Ensure the qcom_scm driver has finished probing iommu/amd: Enforce 4k mapping for certain IOMMU data structures
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd/init.c27
-rw-r--r--drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c4
-rw-r--r--drivers/iommu/intel/dmar.c3
-rw-r--r--drivers/iommu/intel/iommu.c4
-rw-r--r--drivers/iommu/iommu.c10
5 files changed, 36 insertions, 12 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 82e4af8f09bb..23a790f8f550 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -29,6 +29,7 @@
#include <asm/iommu_table.h>
#include <asm/io_apic.h>
#include <asm/irq_remapping.h>
+#include <asm/set_memory.h>
#include <linux/crash_dump.h>
@@ -672,11 +673,27 @@ static void __init free_command_buffer(struct amd_iommu *iommu)
free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
}
+static void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu,
+ gfp_t gfp, size_t size)
+{
+ int order = get_order(size);
+ void *buf = (void *)__get_free_pages(gfp, order);
+
+ if (buf &&
+ iommu_feature(iommu, FEATURE_SNP) &&
+ set_memory_4k((unsigned long)buf, (1 << order))) {
+ free_pages((unsigned long)buf, order);
+ buf = NULL;
+ }
+
+ return buf;
+}
+
/* allocates the memory where the IOMMU will log its events to */
static int __init alloc_event_buffer(struct amd_iommu *iommu)
{
- iommu->evt_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(EVT_BUFFER_SIZE));
+ iommu->evt_buf = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO,
+ EVT_BUFFER_SIZE);
return iommu->evt_buf ? 0 : -ENOMEM;
}
@@ -715,8 +732,8 @@ static void __init free_event_buffer(struct amd_iommu *iommu)
/* allocates the memory where the IOMMU will log its events to */
static int __init alloc_ppr_log(struct amd_iommu *iommu)
{
- iommu->ppr_log = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
- get_order(PPR_LOG_SIZE));
+ iommu->ppr_log = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO,
+ PPR_LOG_SIZE);
return iommu->ppr_log ? 0 : -ENOMEM;
}
@@ -838,7 +855,7 @@ static int iommu_init_ga(struct amd_iommu *iommu)
static int __init alloc_cwwb_sem(struct amd_iommu *iommu)
{
- iommu->cmd_sem = (void *)get_zeroed_page(GFP_KERNEL);
+ iommu->cmd_sem = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO, 1);
return iommu->cmd_sem ? 0 : -ENOMEM;
}
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index be4318044f96..702fbaa6c9ad 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -69,6 +69,10 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
{
struct qcom_smmu *qsmmu;
+ /* Check to make sure qcom_scm has finished probing */
+ if (!qcom_scm_is_available())
+ return ERR_PTR(-EPROBE_DEFER);
+
qsmmu = devm_kzalloc(smmu->dev, sizeof(*qsmmu), GFP_KERNEL);
if (!qsmmu)
return ERR_PTR(-ENOMEM);
diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 11319e4dce4a..b46dbfa6d0ed 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -986,7 +986,8 @@ static int map_iommu(struct intel_iommu *iommu, u64 phys_addr)
warn_invalid_dmar(phys_addr, " returns all ones");
goto unmap;
}
- iommu->vccap = dmar_readq(iommu->reg + DMAR_VCCAP_REG);
+ if (ecap_vcs(iommu->ecap))
+ iommu->vccap = dmar_readq(iommu->reg + DMAR_VCCAP_REG);
/* the registers might be more than one page */
map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index c71a9c279a33..a49afa11673c 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1833,7 +1833,7 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
if (ecap_prs(iommu->ecap))
intel_svm_finish_prq(iommu);
}
- if (ecap_vcs(iommu->ecap) && vccap_pasid(iommu->vccap))
+ if (vccap_pasid(iommu->vccap))
ioasid_unregister_allocator(&iommu->pasid_allocator);
#endif
@@ -3212,7 +3212,7 @@ static void register_pasid_allocator(struct intel_iommu *iommu)
* is active. All vIOMMU allocators will eventually be calling the same
* host allocator.
*/
- if (!ecap_vcs(iommu->ecap) || !vccap_pasid(iommu->vccap))
+ if (!vccap_pasid(iommu->vccap))
return;
pr_info("Register custom PASID allocator\n");
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index b53446bb8c6b..0f4dc25d46c9 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -264,16 +264,18 @@ int iommu_probe_device(struct device *dev)
*/
iommu_alloc_default_domain(group, dev);
- if (group->default_domain)
+ if (group->default_domain) {
ret = __iommu_attach_device(group->default_domain, dev);
+ if (ret) {
+ iommu_group_put(group);
+ goto err_release;
+ }
+ }
iommu_create_device_direct_mappings(group, dev);
iommu_group_put(group);
- if (ret)
- goto err_release;
-
if (ops->probe_finalize)
ops->probe_finalize(dev);