summaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-10 01:03:24 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-10 01:03:24 +0300
commit4dfc2788033d30dfccfd4268e06dd73ce2c654ed (patch)
treef6675b959f4aa12e64e68383874683c4cea46334 /arch
parenta59e57da49f7c3f3de8cf4b7568a0c6c82f5b242 (diff)
parent47b59d8e40850a05370ee9198ea5e505d89489f1 (diff)
downloadlinux-4dfc2788033d30dfccfd4268e06dd73ce2c654ed.tar.xz
Merge tag 'iommu-updates-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel: "Slightly more changes than usual this time: - KDump Kernel IOMMU take-over code for AMD IOMMU. The code now tries to preserve the mappings of the kernel so that master aborts for devices are avoided. Master aborts cause some devices to fail in the kdump kernel, so this code makes the dump more likely to succeed when AMD IOMMU is enabled. - common flush queue implementation for IOVA code users. The code is still optional, but AMD and Intel IOMMU drivers had their own implementation which is now unified. - finish support for iommu-groups. All drivers implement this feature now so that IOMMU core code can rely on it. - finish support for 'struct iommu_device' in iommu drivers. All drivers now use the interface. - new functions in the IOMMU-API for explicit IO/TLB flushing. This will help to reduce the number of IO/TLB flushes when IOMMU drivers support this interface. - support for mt2712 in the Mediatek IOMMU driver - new IOMMU driver for QCOM hardware - system PM support for ARM-SMMU - shutdown method for ARM-SMMU-v3 - some constification patches - various other small improvements and fixes" * tag 'iommu-updates-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits) iommu/vt-d: Don't be too aggressive when clearing one context entry iommu: Introduce Interface for IOMMU TLB Flushing iommu/s390: Constify iommu_ops iommu/vt-d: Avoid calling virt_to_phys() on null pointer iommu/vt-d: IOMMU Page Request needs to check if address is canonical. arm/tegra: Call bus_set_iommu() after iommu_device_register() iommu/exynos: Constify iommu_ops iommu/ipmmu-vmsa: Make ipmmu_gather_ops const iommu/ipmmu-vmsa: Rereserving a free context before setting up a pagetable iommu/amd: Rename a few flush functions iommu/amd: Check if domain is NULL in get_domain() and return -EBUSY iommu/mediatek: Fix a build warning of BIT(32) in ARM iommu/mediatek: Fix a build fail of m4u_type iommu: qcom: annotate PM functions as __maybe_unused iommu/pamu: Fix PAMU boot crash memory: mtk-smi: Degrade SMI init to module_init iommu/mediatek: Enlarge the validate PA range for 4GB mode iommu/mediatek: Disable iommu clock when system suspend iommu/mediatek: Move pgtable allocation into domain_alloc iommu/mediatek: Merge 2 M4U HWs into one iommu domain ...
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/include/asm/pci.h7
-rw-r--r--arch/s390/pci/pci.c9
2 files changed, 15 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index f36b4b726057..386df9adef0a 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -8,6 +8,7 @@
#include <linux/pci.h>
#include <linux/mutex.h>
+#include <linux/iommu.h>
#include <asm-generic/pci.h>
#include <asm/pci_clp.h>
#include <asm/pci_debug.h>
@@ -122,6 +123,8 @@ struct zpci_dev {
unsigned long iommu_pages;
unsigned int next_bit;
+ struct iommu_device iommu_dev; /* IOMMU core handle */
+
char res_name[16];
struct zpci_bar_struct bars[PCI_BAR_COUNT];
@@ -174,6 +177,10 @@ int clp_enable_fh(struct zpci_dev *, u8);
int clp_disable_fh(struct zpci_dev *);
int clp_get_state(u32 fid, enum zpci_state *state);
+/* IOMMU Interface */
+int zpci_init_iommu(struct zpci_dev *zdev);
+void zpci_destroy_iommu(struct zpci_dev *zdev);
+
#ifdef CONFIG_PCI
/* Error handling and recovery */
void zpci_event_error(void *);
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index ddb9923fb45d..a25d95a6612d 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -772,6 +772,7 @@ void pcibios_remove_bus(struct pci_bus *bus)
zpci_exit_slot(zdev);
zpci_cleanup_bus_resources(zdev);
+ zpci_destroy_iommu(zdev);
zpci_free_domain(zdev);
spin_lock(&zpci_list_lock);
@@ -844,11 +845,15 @@ int zpci_create_device(struct zpci_dev *zdev)
if (rc)
goto out;
+ rc = zpci_init_iommu(zdev);
+ if (rc)
+ goto out_free;
+
mutex_init(&zdev->lock);
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
rc = zpci_enable_device(zdev);
if (rc)
- goto out_free;
+ goto out_destroy_iommu;
}
rc = zpci_scan_bus(zdev);
if (rc)
@@ -865,6 +870,8 @@ int zpci_create_device(struct zpci_dev *zdev)
out_disable:
if (zdev->state == ZPCI_FN_STATE_ONLINE)
zpci_disable_device(zdev);
+out_destroy_iommu:
+ zpci_destroy_iommu(zdev);
out_free:
zpci_free_domain(zdev);
out: