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Violators will be prosecuted for from ; Thu, 23 Feb 2017 16:01:29 +1000 From: Sam Bobroff Date: Thu, 23 Feb 2017 16:59:59 +1100 In-Reply-To: References: In-Reply-To: References: Message-Id: Subject: [Qemu-devel] [RFC PATCH v2 06/12] spapr: Add ibm, processor-radix-AP-encodings to the device tree List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, david@gibson.dropbear.id.au, sjitindarsingh@gmail.com Use the new ioctl, KVM_PPC_GET_RMMU_INFO, to fetch radix MMU information from KVM and present the page encodings in the device tree under ibm,processor-radix-AP-encodings. This provides page size information to the guest which is necessary for it to use radix mode. Signed-off-by: Sam Bobroff --- v2: * ppc_radix_page_info now kept in native format, conversion to BE done when adding to the device tree. * radix_page_info moved into the CPU class, cleaning up some code. hw/ppc/spapr.c | 12 ++++++++++++ include/sysemu/kvm.h | 1 + target/ppc/cpu-qom.h | 1 + target/ppc/cpu.h | 4 ++++ target/ppc/kvm.c | 27 +++++++++++++++++++++++++++ 5 files changed, 45 insertions(+) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index cceb35f083..ca3812555f 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -409,6 +409,8 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset, sPAPRDRConnector *drc; sPAPRDRConnectorClass *drck; int drc_index; + uint32_t radix_AP_encodings[PPC_PAGE_SIZES_MAX_SZ]; + int i; drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_CPU, index); if (drc) { @@ -494,6 +496,16 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset, _FDT(spapr_fixup_cpu_numa_dt(fdt, offset, cs)); _FDT(spapr_fixup_cpu_smt_dt(fdt, offset, cpu, compat_smt)); + + if (pcc->radix_page_info) { + for (i = 0; i < pcc->radix_page_info->count; i++) { + radix_AP_encodings[i] = cpu_to_be32(pcc->radix_page_info->entries[i]); + } + _FDT((fdt_setprop(fdt, offset, "ibm,processor-radix-AP-encodings", + radix_AP_encodings, + pcc->radix_page_info->count * + sizeof(radix_AP_encodings[0])))); + } } static void spapr_populate_cpus_dt_node(void *fdt, sPAPRMachineState *spapr) diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 3045ee7678..01a8db1180 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -526,5 +526,6 @@ int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source); * Returns: 0 on success, or a negative errno on failure. */ int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target); +struct ppc_radix_page_info *kvm_get_radix_page_info(void); int kvm_get_max_memslots(void); #endif diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h index 4807f4d86c..0efb543912 100644 --- a/target/ppc/cpu-qom.h +++ b/target/ppc/cpu-qom.h @@ -195,6 +195,7 @@ typedef struct PowerPCCPUClass { int bfd_mach; uint32_t l1_dcache_size, l1_icache_size; const struct ppc_segment_page_sizes *sps; + struct ppc_radix_page_info *radix_page_info; void (*init_proc)(CPUPPCState *env); int (*check_pow)(CPUPPCState *env); int (*handle_mmu_fault)(PowerPCCPU *cpu, vaddr eaddr, int rwx, int mmu_idx); diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index b559b67073..a6c8c5ff4c 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -934,6 +934,10 @@ struct ppc_segment_page_sizes { struct ppc_one_seg_page_size sps[PPC_PAGE_SIZES_MAX_SZ]; }; +struct ppc_radix_page_info { + uint32_t count; + uint32_t entries[PPC_PAGE_SIZES_MAX_SZ]; +}; /*****************************************************************************/ /* The whole PowerPC CPU context */ diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index d53ede8b4a..cf62a42c1f 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -48,6 +48,7 @@ #if defined(TARGET_PPC64) #include "hw/ppc/spapr_cpu_core.h" #endif +#include "sysemu/kvm_int.h" //#define DEBUG_KVM @@ -329,6 +330,30 @@ static void kvm_get_smmu_info(PowerPCCPU *cpu, struct kvm_ppc_smmu_info *info) kvm_get_fallback_smmu_info(cpu, info); } +struct ppc_radix_page_info *kvm_get_radix_page_info(void) +{ + KVMState *s = KVM_STATE(current_machine->accelerator); + struct ppc_radix_page_info *radix_page_info; + struct kvm_ppc_rmmu_info rmmu_info; + int i; + + if (!kvm_check_extension(s, KVM_CAP_PPC_MMU_RADIX)) { + return NULL; + } + if (kvm_vm_ioctl(s, KVM_PPC_GET_RMMU_INFO, &rmmu_info)) { + return NULL; + } + radix_page_info = g_malloc0(sizeof(*radix_page_info)); + radix_page_info->count = 0; + for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) { + if (rmmu_info.ap_encodings[i]) { + radix_page_info->entries[i] = rmmu_info.ap_encodings[i]; + radix_page_info->count++; + } + } + return radix_page_info; +} + static long gethugepagesize(const char *mem_path) { struct statfs fs; @@ -2379,6 +2404,8 @@ static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data) pcc->l1_icache_size = icache_size; } + pcc->radix_page_info = kvm_enabled() ? kvm_get_radix_page_info() : NULL; + /* Reason: kvmppc_host_cpu_initfn() dies when !kvm_enabled() */ dc->cannot_destroy_with_object_finalize_yet = true; } -- 2.11.0