diff options
Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 21f35af762..75832d83b8 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -14,6 +14,7 @@ * */ +#include <dirent.h> #include <sys/types.h> #include <sys/ioctl.h> #include <sys/mman.h> @@ -28,6 +29,10 @@ #include "cpu.h" #include "device_tree.h" +#include "hw/sysbus.h" +#include "hw/spapr.h" +#include "hw/spapr_vio.h" + //#define DEBUG_KVM #ifdef DEBUG_KVM @@ -38,6 +43,8 @@ do { } while (0) #endif +#define PROC_DEVTREE_CPU "/proc/device-tree/cpus/" + const KVMCapabilityInfo kvm_arch_required_capabilities[] = { KVM_CAP_LAST_INFO }; @@ -105,6 +112,52 @@ static int kvm_arch_sync_sregs(CPUState *cenv) return kvm_vcpu_ioctl(cenv, KVM_SET_SREGS, &sregs); } +/* Set up a shared TLB array with KVM */ +static int kvm_booke206_tlb_init(CPUState *env) +{ + struct kvm_book3e_206_tlb_params params = {}; + struct kvm_config_tlb cfg = {}; + struct kvm_enable_cap encap = {}; + unsigned int entries = 0; + int ret, i; + + if (!kvm_enabled() || + !kvm_check_extension(env->kvm_state, KVM_CAP_SW_TLB)) { + return 0; + } + + assert(ARRAY_SIZE(params.tlb_sizes) == BOOKE206_MAX_TLBN); + + for (i = 0; i < BOOKE206_MAX_TLBN; i++) { + params.tlb_sizes[i] = booke206_tlb_size(env, i); + params.tlb_ways[i] = booke206_tlb_ways(env, i); + entries += params.tlb_sizes[i]; + } + + assert(entries == env->nb_tlb); + assert(sizeof(struct kvm_book3e_206_tlb_entry) == sizeof(ppcmas_tlb_t)); + + env->tlb_dirty = true; + + cfg.array = (uintptr_t)env->tlb.tlbm; + cfg.array_len = sizeof(ppcmas_tlb_t) * entries; + cfg.params = (uintptr_t)¶ms; + cfg.mmu_type = KVM_MMU_FSL_BOOKE_NOHV; + + encap.cap = KVM_CAP_SW_TLB; + encap.args[0] = (uintptr_t)&cfg; + + ret = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &encap); + if (ret < 0) { + fprintf(stderr, "%s: couldn't enable KVM_CAP_SW_TLB: %s\n", + __func__, strerror(-ret)); + return ret; + } + + env->kvm_sw_tlb = true; + return 0; +} + int kvm_arch_init_vcpu(CPUState *cenv) { int ret; @@ -116,6 +169,15 @@ int kvm_arch_init_vcpu(CPUState *cenv) idle_timer = qemu_new_timer_ns(vm_clock, kvm_kick_env, cenv); + /* Some targets support access to KVM's guest TLB. */ + switch (cenv->mmu_model) { + case POWERPC_MMU_BOOKE206: + ret = kvm_booke206_tlb_init(cenv); + break; + default: + break; + } + return ret; } @@ -123,6 +185,31 @@ void kvm_arch_reset_vcpu(CPUState *env) { } +static void kvm_sw_tlb_put(CPUState *env) +{ + struct kvm_dirty_tlb dirty_tlb; + unsigned char *bitmap; + int ret; + + if (!env->kvm_sw_tlb) { + return; + } + + bitmap = g_malloc((env->nb_tlb + 7) / 8); + memset(bitmap, 0xFF, (env->nb_tlb + 7) / 8); + + dirty_tlb.bitmap = (uintptr_t)bitmap; + dirty_tlb.num_dirty = env->nb_tlb; + + ret = kvm_vcpu_ioctl(env, KVM_DIRTY_TLB, &dirty_tlb); + if (ret) { + fprintf(stderr, "%s: KVM_DIRTY_TLB: %s\n", + __func__, strerror(-ret)); + } + + g_free(bitmap); +} + int kvm_arch_put_registers(CPUState *env, int level) { struct kvm_regs regs; @@ -160,6 +247,11 @@ int kvm_arch_put_registers(CPUState *env, int level) if (ret < 0) return ret; + if (env->tlb_dirty) { + kvm_sw_tlb_put(env); + env->tlb_dirty = false; + } + return ret; } @@ -452,6 +544,14 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) dprintf("handle halt\n"); ret = kvmppc_handle_halt(env); break; +#ifdef CONFIG_PSERIES + case KVM_EXIT_PAPR_HCALL: + dprintf("handle PAPR hypercall\n"); + run->papr_hcall.ret = spapr_hypercall(env, run->papr_hcall.nr, + run->papr_hcall.args); + ret = 1; + break; +#endif default: fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); ret = -1; @@ -509,6 +609,70 @@ uint32_t kvmppc_get_tbfreq(void) return retval; } +/* Try to find a device tree node for a CPU with clock-frequency property */ +static int kvmppc_find_cpu_dt(char *buf, int buf_len) +{ + struct dirent *dirp; + DIR *dp; + + if ((dp = opendir(PROC_DEVTREE_CPU)) == NULL) { + printf("Can't open directory " PROC_DEVTREE_CPU "\n"); + return -1; + } + + buf[0] = '\0'; + while ((dirp = readdir(dp)) != NULL) { + FILE *f; + snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU, + dirp->d_name); + f = fopen(buf, "r"); + if (f) { + snprintf(buf, buf_len, "%s%s", PROC_DEVTREE_CPU, dirp->d_name); + fclose(f); + break; + } + buf[0] = '\0'; + } + closedir(dp); + if (buf[0] == '\0') { + printf("Unknown host!\n"); + return -1; + } + + return 0; +} + +uint64_t kvmppc_get_clockfreq(void) +{ + char buf[512]; + uint32_t tb[2]; + FILE *f; + int len; + + if (kvmppc_find_cpu_dt(buf, sizeof(buf))) { + return 0; + } + + strncat(buf, "/clock-frequency", sizeof(buf) - strlen(buf)); + + f = fopen(buf, "rb"); + if (!f) { + return -1; + } + + len = fread(tb, sizeof(tb[0]), 2, f); + fclose(f); + switch (len) { + case 1: + /* freq is only a single cell */ + return tb[0]; + case 2: + return *(uint64_t*)tb; + } + + return 0; +} + int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len) { uint32_t *hc = (uint32_t*)buf; @@ -539,6 +703,53 @@ int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len) return 0; } +void kvmppc_set_papr(CPUState *env) +{ + struct kvm_enable_cap cap = {}; + struct kvm_one_reg reg = {}; + struct kvm_sregs sregs = {}; + int ret; + + cap.cap = KVM_CAP_PPC_PAPR; + ret = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &cap); + + if (ret) { + goto fail; + } + + /* + * XXX We set HIOR here. It really should be a qdev property of + * the CPU node, but we don't have CPUs converted to qdev yet. + * + * Once we have qdev CPUs, move HIOR to a qdev property and + * remove this chunk. + */ + reg.id = KVM_ONE_REG_PPC_HIOR; + reg.u.reg64 = env->spr[SPR_HIOR]; + ret = kvm_vcpu_ioctl(env, KVM_SET_ONE_REG, ®); + if (ret) { + goto fail; + } + + /* Set SDR1 so kernel space finds the HTAB */ + ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); + if (ret) { + goto fail; + } + + sregs.u.s.sdr1 = env->spr[SPR_SDR1]; + + ret = kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs); + if (ret) { + goto fail; + } + + return; + +fail: + cpu_abort(env, "This KVM version does not support PAPR\n"); +} + bool kvm_arch_stop_on_emulation_error(CPUState *env) { return true; |