drm/amdkfd: Allow building KFD on ARM64 (v2)

ifdef x86_64 specific code.
Allow enabling CONFIG_HSA_AMD on ARM64.

v2: Fixed a compiler warning due to an unused variable

CC: Mark Nutter <Mark.Nutter@arm.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Mark Nutter <Mark.Nutter@arm.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/Kconfig b/drivers/gpu/drm/amd/amdkfd/Kconfig
index fbf0ee5201c370b1a09f51d6b2dfd6557b89b496..c3613604a4f8bc2d8d6bd60b4fc5dd31aa4dee55 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/Kconfig
+++ b/drivers/gpu/drm/amd/amdkfd/Kconfig
@@ -4,8 +4,8 @@
 
 config HSA_AMD
        bool "HSA kernel driver for AMD GPU devices"
-       depends on DRM_AMDGPU && X86_64
-       imply AMD_IOMMU_V2
+       depends on DRM_AMDGPU && (X86_64 || ARM64)
+       imply AMD_IOMMU_V2 if X86_64
        select MMU_NOTIFIER
        help
          Enable this if you want to use HSA features on AMD GPU devices.

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index b7bc7d7d048f679cb11d58184578859868bd9bd4..5d85ff341385069cc349a83fe607d2e7511345a2 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -863,6 +863,7 @@ static int kfd_fill_mem_info_for_cpu(int numa_node_id, int *avail_size,
        return 0;
 }
 
+#if CONFIG_X86_64
 static int kfd_fill_iolink_info_for_cpu(int numa_node_id, int *avail_size,
                                uint32_t *num_entries,
                                struct crat_subtype_iolink *sub_type_hdr)
@@ -905,6 +906,7 @@ static int kfd_fill_iolink_info_for_cpu(int numa_node_id, int *avail_size,
 
        return 0;
 }
+#endif
 
 /* kfd_create_vcrat_image_cpu - Create Virtual CRAT for CPU
  *
@@ -920,7 +922,9 @@ static int kfd_create_vcrat_image_cpu(void *pcrat_image, size_t *size)
        struct crat_subtype_generic *sub_type_hdr;
        int avail_size = *size;
        int numa_node_id;
+#ifdef CONFIG_X86_64
        uint32_t entries = 0;
+#endif
        int ret = 0;
 
        if (!pcrat_image || avail_size < VCRAT_SIZE_FOR_CPU)
@@ -982,6 +986,7 @@ static int kfd_create_vcrat_image_cpu(void *pcrat_image, size_t *size)
                        sub_type_hdr->length);
 
                /* Fill in Subtype: IO Link */
+#ifdef CONFIG_X86_64
                ret = kfd_fill_iolink_info_for_cpu(numa_node_id, &avail_size,
                                &entries,
                                (struct crat_subtype_iolink *)sub_type_hdr);
@@ -992,6 +997,9 @@ static int kfd_create_vcrat_image_cpu(void *pcrat_image, size_t *size)
 
                sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
                                sub_type_hdr->length * entries);
+#else
+               pr_info("IO link not available for non x86 platforms\n");
+#endif
 
                crat_table->num_domains++;
        }

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 5f5b2acedbac3bf0e15d8727d5327af37e3f7a79..4734f1a35516ade4846fb36ff1476be6ea1fcd5e 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -1392,7 +1392,6 @@ int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
 
 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
 {
-       const struct cpuinfo_x86 *cpuinfo;
        int first_cpu_of_numa_node;
 
        if (!cpumask || cpumask == cpu_none_mask)
@@ -1400,9 +1399,11 @@ static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
        first_cpu_of_numa_node = cpumask_first(cpumask);
        if (first_cpu_of_numa_node >= nr_cpu_ids)
                return -1;
-       cpuinfo = &cpu_data(first_cpu_of_numa_node);
-
-       return cpuinfo->apicid;
+#ifdef CONFIG_X86_64
+       return cpu_data(first_cpu_of_numa_node).apicid;
+#else
+       return first_cpu_of_numa_node;
+#endif
 }
 
 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor