Messages in this thread Patch in this message | | | From | Suravee Suthikulpanit <> | Subject | [PATCH V6 6/7] iommu/amd: Introduce amd_iommu_get_num_iommus() | Date | Fri, 23 Dec 2016 20:38:49 +0700 |
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This patch introduces amd_iommu_get_num_iommus(). This is intended for Perf AMD IOMMU driver.
Cc: Joerg Roedel <joro@8bytes.org> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> --- arch/x86/events/amd/iommu.h | 2 ++ drivers/iommu/amd_iommu_init.c | 7 ++++++- drivers/iommu/amd_iommu_proto.h | 1 + 3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/x86/events/amd/iommu.h b/arch/x86/events/amd/iommu.h index 71ec9d7..891c7c4 100644 --- a/arch/x86/events/amd/iommu.h +++ b/arch/x86/events/amd/iommu.h @@ -25,6 +25,8 @@ #define PC_MAX_SPEC_CNTRS 16 /* amd_iommu_init.c external support functions */ +extern int amd_iommu_get_num_iommus(void); + extern bool amd_iommu_pc_supported(void); extern u8 amd_iommu_pc_get_max_banks(uint devid); diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index c993c77..c3740cb 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1329,7 +1329,7 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h) /* Add IOMMU to internal data structures */ list_add_tail(&iommu->list, &amd_iommu_list); - iommu->index = amd_iommus_present++; + iommu->index = amd_iommus_present++; if (unlikely(iommu->index >= MAX_IOMMUS)) { WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n"); @@ -2717,6 +2717,11 @@ static struct amd_iommu *get_amd_iommu(uint idx) return iommu; } +int amd_iommu_get_num_iommus(void) +{ + return amd_iommus_present; +} + /**************************************************************************** * * IOMMU EFR Performance Counter support functionality. This code allows diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h index 1df3ff7..58dfdbf 100644 --- a/drivers/iommu/amd_iommu_proto.h +++ b/drivers/iommu/amd_iommu_proto.h @@ -61,6 +61,7 @@ extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid, #define IOMMU_PC_COUNTER_REG 0x00 #endif +extern int amd_iommu_get_num_iommus(void); extern bool amd_iommu_pc_supported(void); extern u8 amd_iommu_pc_get_max_banks(uint devid); extern u8 amd_iommu_pc_get_max_counters(uint devid); -- 1.8.3.1
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