This patch introduces amd_iommu_get_num_iommus(). This is intended for Perf AMD IOMMU driver.
Signed-off-by: Suravee Suthikulpanit <[email protected]> --- arch/x86/include/asm/perf/amd/iommu.h | 2 ++ drivers/iommu/amd_iommu_init.c | 7 ++++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/perf/amd/iommu.h b/arch/x86/include/asm/perf/amd/iommu.h index 60ddfb6..b4c3fd2 100644 --- a/arch/x86/include/asm/perf/amd/iommu.h +++ b/arch/x86/include/asm/perf/amd/iommu.h @@ -25,6 +25,8 @@ #define PC_MAX_SPEC_CNTRS 16 /* amd_iommu_init.c external support functions */ +int amd_iommu_get_num_iommus(void); + bool amd_iommu_pc_supported(void); u8 amd_iommu_pc_get_max_banks(int idx); diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index b68a2d6..59fc4c6 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1030,7 +1030,7 @@ 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"); @@ -2259,6 +2259,11 @@ static struct amd_iommu *get_amd_iommu(int idx) return iommu; } +int amd_iommu_get_num_iommus(void) +{ + return amd_iommus_present; +} + /**************************************************************************** * * IOMMU EFR Performance Counter support functionality. This code allows -- 1.9.1
