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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-28 15:11:02 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-12 14:54:52 +0100 |
| commit | 400a28a05f2cc1a311acb4ff6ac64d8402d21678 (patch) | |
| tree | 4dca7cd2b8610ca0bb5ea7a7df4a0af995aa733b /drivers/iommu | |
| parent | cbc33a9085995e21f52a66380d108d64916b6787 (diff) | |
| download | linux-400a28a05f2cc1a311acb4ff6ac64d8402d21678.tar.gz linux-400a28a05f2cc1a311acb4ff6ac64d8402d21678.tar.bz2 linux-400a28a05f2cc1a311acb4ff6ac64d8402d21678.zip | |
iommu/amd: Add iommuv2 flag to struct amd_iommu
In mixed IOMMU setups this flag inidicates whether an IOMMU
supports the v2 features or not. This patch also adds a
global flag together with a function to query that flag from
other code. The flag shows if at least one IOMMUv2 is in the
system.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 15 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_proto.h | 3 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 5 |
3 files changed, 23 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 2c25ae306e7c..d1e5067852d4 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -25,6 +25,7 @@ #include <linux/interrupt.h> #include <linux/msi.h> #include <linux/amd-iommu.h> +#include <linux/export.h> #include <asm/pci-direct.h> #include <asm/iommu.h> #include <asm/gart.h> @@ -143,6 +144,8 @@ bool amd_iommu_iotlb_sup __read_mostly = true; u32 amd_iommu_max_pasids __read_mostly = ~0; +bool amd_iommu_v2_present __read_mostly; + /* * The ACPI table parsing functions set this variable on an error */ @@ -760,6 +763,12 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu) amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids); } + if (iommu_feature(iommu, FEATURE_GT) && + iommu_feature(iommu, FEATURE_PPR)) { + iommu->is_iommu_v2 = true; + amd_iommu_v2_present = true; + } + if (!is_rd890_iommu(iommu->dev)) return; @@ -1645,3 +1654,9 @@ IOMMU_INIT_FINISH(amd_iommu_detect, gart_iommu_hole_init, 0, 0); + +bool amd_iommu_v2_supported(void) +{ + return amd_iommu_v2_present; +} +EXPORT_SYMBOL(amd_iommu_v2_supported); diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h index 7ffaa64410b0..3a46c300dffb 100644 --- a/drivers/iommu/amd_iommu_proto.h +++ b/drivers/iommu/amd_iommu_proto.h @@ -31,6 +31,9 @@ extern int amd_iommu_init_devices(void); extern void amd_iommu_uninit_devices(void); extern void amd_iommu_init_notifier(void); extern void amd_iommu_init_api(void); + +extern bool amd_iommu_v2_supported(void); + #ifndef CONFIG_AMD_IOMMU_STATS static inline void amd_iommu_stats_init(void) { } diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index a6e1dc616afe..7e81094ab73b 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -414,6 +414,9 @@ struct amd_iommu { /* Extended features */ u64 features; + /* IOMMUv2 */ + bool is_iommu_v2; + /* * Capability pointer. There could be more than one IOMMU per PCI * device function if there are more than one AMD IOMMU capability @@ -570,6 +573,8 @@ extern bool amd_iommu_unmap_flush; /* Smallest number of PASIDs supported by any IOMMU in the system */ extern u32 amd_iommu_max_pasids; +extern bool amd_iommu_v2_present; + /* takes bus and device/function and returns the device id * FIXME: should that be in generic PCI code? */ static inline u16 calc_devid(u8 bus, u8 devfn) |