From 3a6e4ce684e48988f9736aecc6b365609e83f8d1 Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Mon, 20 Sep 2021 14:49:43 -0300 Subject: [PATCH] spapr_numa.c: parametrize FORM1 macros The next preliminary step to introduce NUMA FORM2 affinity is to make the existing code independent of FORM1 macros and values, i.e. MAX_DISTANCE_REF_POINTS, NUMA_ASSOC_SIZE and VCPU_ASSOC_SIZE. This patch accomplishes that by doing the following: - move the NUMA related macros from spapr.h to spapr_numa.c where they are used. spapr.h gets instead a 'NUMA_NODES_MAX_NUM' macro that is used to refer to the maximum number of NUMA nodes, including GPU nodes, that the machine can support; - MAX_DISTANCE_REF_POINTS and NUMA_ASSOC_SIZE are renamed to FORM1_DIST_REF_POINTS and FORM1_NUMA_ASSOC_SIZE. These FORM1 specific macros are used in FORM1 init functions; - code that uses MAX_DISTANCE_REF_POINTS now retrieves the max_dist_ref_points value using get_max_dist_ref_points(). NUMA_ASSOC_SIZE is replaced by get_numa_assoc_size() and VCPU_ASSOC_SIZE is replaced by get_vcpu_assoc_size(). These functions are used by the generic device tree functions and h_home_node_associativity() and will allow them to switch between FORM1 and FORM2 without changing their core logic. Reviewed-by: Greg Kurz Signed-off-by: Daniel Henrique Barboza Message-Id: <20210920174947.556324-4-danielhb413@gmail.com> Signed-off-by: David Gibson --- hw/ppc/spapr_numa.c | 74 ++++++++++++++++++++++++++++++------------ include/hw/ppc/spapr.h | 34 +++++++++---------- 2 files changed, 70 insertions(+), 38 deletions(-) diff --git a/hw/ppc/spapr_numa.c b/hw/ppc/spapr_numa.c index bf520d42b2..08e2d6aed8 100644 --- a/hw/ppc/spapr_numa.c +++ b/hw/ppc/spapr_numa.c @@ -19,6 +19,33 @@ /* Moved from hw/ppc/spapr_pci_nvlink2.c */ #define SPAPR_GPU_NUMA_ID (cpu_to_be32(1)) +/* + * Retrieves max_dist_ref_points of the current NUMA affinity. + */ +static int get_max_dist_ref_points(SpaprMachineState *spapr) +{ + return FORM1_DIST_REF_POINTS; +} + +/* + * Retrieves numa_assoc_size of the current NUMA affinity. + */ +static int get_numa_assoc_size(SpaprMachineState *spapr) +{ + return FORM1_NUMA_ASSOC_SIZE; +} + +/* + * Retrieves vcpu_assoc_size of the current NUMA affinity. + * + * vcpu_assoc_size is the size of ibm,associativity array + * for CPUs, which has an extra element (vcpu_id) in the end. + */ +static int get_vcpu_assoc_size(SpaprMachineState *spapr) +{ + return get_numa_assoc_size(spapr) + 1; +} + static bool spapr_numa_is_symmetrical(MachineState *ms) { int src, dst; @@ -96,7 +123,7 @@ static void spapr_numa_define_FORM1_domains(SpaprMachineState *spapr) * considered a match with associativity domains of node 0. */ for (i = 1; i < nb_numa_nodes; i++) { - for (j = 1; j < MAX_DISTANCE_REF_POINTS; j++) { + for (j = 1; j < FORM1_DIST_REF_POINTS; j++) { spapr->numa_assoc_array[i][j] = cpu_to_be32(i); } } @@ -134,7 +161,7 @@ static void spapr_numa_define_FORM1_domains(SpaprMachineState *spapr) * * The Linux kernel will assume that the distance between src and * dst, in this case of no match, is 10 (local distance) doubled - * for each NUMA it didn't match. We have MAX_DISTANCE_REF_POINTS + * for each NUMA it didn't match. We have FORM1_DIST_REF_POINTS * levels (4), so this gives us 10*2*2*2*2 = 160. * * This logic can be seen in the Linux kernel source code, as of @@ -169,7 +196,7 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachineState *spapr, /* * For all associativity arrays: first position is the size, - * position MAX_DISTANCE_REF_POINTS is always the numa_id, + * position FORM1_DIST_REF_POINTS is always the numa_id, * represented by the index 'i'. * * This will break on sparse NUMA setups, when/if QEMU starts @@ -177,8 +204,8 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachineState *spapr, * 'i' will be a valid node_id set by the user. */ for (i = 0; i < nb_numa_nodes; i++) { - spapr->numa_assoc_array[i][0] = cpu_to_be32(MAX_DISTANCE_REF_POINTS); - spapr->numa_assoc_array[i][MAX_DISTANCE_REF_POINTS] = cpu_to_be32(i); + spapr->numa_assoc_array[i][0] = cpu_to_be32(FORM1_DIST_REF_POINTS); + spapr->numa_assoc_array[i][FORM1_DIST_REF_POINTS] = cpu_to_be32(i); } /* @@ -192,15 +219,15 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachineState *spapr, max_nodes_with_gpus = nb_numa_nodes + NVGPU_MAX_NUM; for (i = nb_numa_nodes; i < max_nodes_with_gpus; i++) { - spapr->numa_assoc_array[i][0] = cpu_to_be32(MAX_DISTANCE_REF_POINTS); + spapr->numa_assoc_array[i][0] = cpu_to_be32(FORM1_DIST_REF_POINTS); - for (j = 1; j < MAX_DISTANCE_REF_POINTS; j++) { + for (j = 1; j < FORM1_DIST_REF_POINTS; j++) { uint32_t gpu_assoc = smc->pre_5_1_assoc_refpoints ? SPAPR_GPU_NUMA_ID : cpu_to_be32(i); spapr->numa_assoc_array[i][j] = gpu_assoc; } - spapr->numa_assoc_array[i][MAX_DISTANCE_REF_POINTS] = cpu_to_be32(i); + spapr->numa_assoc_array[i][FORM1_DIST_REF_POINTS] = cpu_to_be32(i); } /* @@ -234,13 +261,15 @@ void spapr_numa_write_associativity_dt(SpaprMachineState *spapr, void *fdt, { _FDT((fdt_setprop(fdt, offset, "ibm,associativity", spapr->numa_assoc_array[nodeid], - sizeof(spapr->numa_assoc_array[nodeid])))); + get_numa_assoc_size(spapr) * sizeof(uint32_t)))); } static uint32_t *spapr_numa_get_vcpu_assoc(SpaprMachineState *spapr, PowerPCCPU *cpu) { - uint32_t *vcpu_assoc = g_new(uint32_t, VCPU_ASSOC_SIZE); + int max_distance_ref_points = get_max_dist_ref_points(spapr); + int vcpu_assoc_size = get_vcpu_assoc_size(spapr); + uint32_t *vcpu_assoc = g_new(uint32_t, vcpu_assoc_size); int index = spapr_get_vcpu_id(cpu); /* @@ -249,10 +278,10 @@ static uint32_t *spapr_numa_get_vcpu_assoc(SpaprMachineState *spapr, * 0, put cpu_id last, then copy the remaining associativity * domains. */ - vcpu_assoc[0] = cpu_to_be32(MAX_DISTANCE_REF_POINTS + 1); - vcpu_assoc[VCPU_ASSOC_SIZE - 1] = cpu_to_be32(index); + vcpu_assoc[0] = cpu_to_be32(max_distance_ref_points + 1); + vcpu_assoc[vcpu_assoc_size - 1] = cpu_to_be32(index); memcpy(vcpu_assoc + 1, spapr->numa_assoc_array[cpu->node_id] + 1, - (VCPU_ASSOC_SIZE - 2) * sizeof(uint32_t)); + (vcpu_assoc_size - 2) * sizeof(uint32_t)); return vcpu_assoc; } @@ -261,12 +290,13 @@ int spapr_numa_fixup_cpu_dt(SpaprMachineState *spapr, void *fdt, int offset, PowerPCCPU *cpu) { g_autofree uint32_t *vcpu_assoc = NULL; + int vcpu_assoc_size = get_vcpu_assoc_size(spapr); vcpu_assoc = spapr_numa_get_vcpu_assoc(spapr, cpu); /* Advertise NUMA via ibm,associativity */ return fdt_setprop(fdt, offset, "ibm,associativity", vcpu_assoc, - VCPU_ASSOC_SIZE * sizeof(uint32_t)); + vcpu_assoc_size * sizeof(uint32_t)); } @@ -274,17 +304,18 @@ int spapr_numa_write_assoc_lookup_arrays(SpaprMachineState *spapr, void *fdt, int offset) { MachineState *machine = MACHINE(spapr); + int max_distance_ref_points = get_max_dist_ref_points(spapr); int nb_numa_nodes = machine->numa_state->num_nodes; int nr_nodes = nb_numa_nodes ? nb_numa_nodes : 1; uint32_t *int_buf, *cur_index, buf_len; int ret, i; /* ibm,associativity-lookup-arrays */ - buf_len = (nr_nodes * MAX_DISTANCE_REF_POINTS + 2) * sizeof(uint32_t); + buf_len = (nr_nodes * max_distance_ref_points + 2) * sizeof(uint32_t); cur_index = int_buf = g_malloc0(buf_len); int_buf[0] = cpu_to_be32(nr_nodes); /* Number of entries per associativity list */ - int_buf[1] = cpu_to_be32(MAX_DISTANCE_REF_POINTS); + int_buf[1] = cpu_to_be32(max_distance_ref_points); cur_index += 2; for (i = 0; i < nr_nodes; i++) { /* @@ -293,8 +324,8 @@ int spapr_numa_write_assoc_lookup_arrays(SpaprMachineState *spapr, void *fdt, */ uint32_t *associativity = spapr->numa_assoc_array[i]; memcpy(cur_index, ++associativity, - sizeof(uint32_t) * MAX_DISTANCE_REF_POINTS); - cur_index += MAX_DISTANCE_REF_POINTS; + sizeof(uint32_t) * max_distance_ref_points); + cur_index += max_distance_ref_points; } ret = fdt_setprop(fdt, offset, "ibm,associativity-lookup-arrays", int_buf, (cur_index - int_buf) * sizeof(uint32_t)); @@ -383,6 +414,7 @@ static target_ulong h_home_node_associativity(PowerPCCPU *cpu, target_ulong procno = args[1]; PowerPCCPU *tcpu; int idx, assoc_idx; + int vcpu_assoc_size = get_vcpu_assoc_size(spapr); /* only support procno from H_REGISTER_VPA */ if (flags != 0x1) { @@ -401,7 +433,7 @@ static target_ulong h_home_node_associativity(PowerPCCPU *cpu, * 12 associativity domains for vcpus. Assert and bail if that's * not the case. */ - G_STATIC_ASSERT((VCPU_ASSOC_SIZE - 1) <= 12); + g_assert((vcpu_assoc_size - 1) <= 12); vcpu_assoc = spapr_numa_get_vcpu_assoc(spapr, tcpu); /* assoc_idx starts at 1 to skip associativity size */ @@ -422,9 +454,9 @@ static target_ulong h_home_node_associativity(PowerPCCPU *cpu, * macro. The ternary will fill the remaining registers with -1 * after we went through vcpu_assoc[]. */ - a = assoc_idx < VCPU_ASSOC_SIZE ? + a = assoc_idx < vcpu_assoc_size ? be32_to_cpu(vcpu_assoc[assoc_idx++]) : -1; - b = assoc_idx < VCPU_ASSOC_SIZE ? + b = assoc_idx < vcpu_assoc_size ? be32_to_cpu(vcpu_assoc[assoc_idx++]) : -1; args[idx] = ASSOCIATIVITY(a, b); diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 637652ad16..814e087e98 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -100,23 +100,23 @@ typedef enum { #define FDT_MAX_SIZE 0x200000 -/* - * NUMA related macros. MAX_DISTANCE_REF_POINTS was taken - * from Linux kernel arch/powerpc/mm/numa.h. It represents the - * amount of associativity domains for non-CPU resources. - * - * NUMA_ASSOC_SIZE is the base array size of an ibm,associativity - * array for any non-CPU resource. - * - * VCPU_ASSOC_SIZE represents the size of ibm,associativity array - * for CPUs, which has an extra element (vcpu_id) in the end. - */ -#define MAX_DISTANCE_REF_POINTS 4 -#define NUMA_ASSOC_SIZE (MAX_DISTANCE_REF_POINTS + 1) -#define VCPU_ASSOC_SIZE (NUMA_ASSOC_SIZE + 1) +/* Max number of GPUs per system */ +#define NVGPU_MAX_NUM 6 -/* Max number of these GPUsper a physical box */ -#define NVGPU_MAX_NUM 6 +/* Max number of NUMA nodes */ +#define NUMA_NODES_MAX_NUM (MAX_NODES + NVGPU_MAX_NUM) + +/* + * NUMA FORM1 macros. FORM1_DIST_REF_POINTS was taken from + * MAX_DISTANCE_REF_POINTS in arch/powerpc/mm/numa.h from Linux + * kernel source. It represents the amount of associativity domains + * for non-CPU resources. + * + * FORM1_NUMA_ASSOC_SIZE is the base array size of an ibm,associativity + * array for any non-CPU resource. + */ +#define FORM1_DIST_REF_POINTS 4 +#define FORM1_NUMA_ASSOC_SIZE (FORM1_DIST_REF_POINTS + 1) typedef struct SpaprCapabilities SpaprCapabilities; struct SpaprCapabilities { @@ -249,7 +249,7 @@ struct SpaprMachineState { unsigned gpu_numa_id; SpaprTpmProxy *tpm_proxy; - uint32_t numa_assoc_array[MAX_NODES + NVGPU_MAX_NUM][NUMA_ASSOC_SIZE]; + uint32_t numa_assoc_array[NUMA_NODES_MAX_NUM][FORM1_NUMA_ASSOC_SIZE]; Error *fwnmi_migration_blocker; };