| /* |
| * PowerPC implementation of KVM hooks |
| * |
| * Copyright IBM Corp. 2007 |
| * Copyright (C) 2011 Freescale Semiconductor, Inc. |
| * |
| * Authors: |
| * Jerone Young <jyoung5@us.ibm.com> |
| * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> |
| * Hollis Blanchard <hollisb@us.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include <dirent.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| #include <sys/vfs.h> |
| |
| #include <linux/kvm.h> |
| |
| #include "qemu-common.h" |
| #include "qemu-timer.h" |
| #include "sysemu.h" |
| #include "kvm.h" |
| #include "kvm_ppc.h" |
| #include "cpu.h" |
| #include "cpus.h" |
| #include "device_tree.h" |
| #include "hw/sysbus.h" |
| #include "hw/spapr.h" |
| |
| #include "hw/sysbus.h" |
| #include "hw/spapr.h" |
| #include "hw/spapr_vio.h" |
| |
| //#define DEBUG_KVM |
| |
| #ifdef DEBUG_KVM |
| #define dprintf(fmt, ...) \ |
| do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| #else |
| #define dprintf(fmt, ...) \ |
| do { } while (0) |
| #endif |
| |
| #define PROC_DEVTREE_CPU "/proc/device-tree/cpus/" |
| |
| const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
| KVM_CAP_LAST_INFO |
| }; |
| |
| static int cap_interrupt_unset = false; |
| static int cap_interrupt_level = false; |
| static int cap_segstate; |
| static int cap_booke_sregs; |
| static int cap_ppc_smt; |
| static int cap_ppc_rma; |
| static int cap_spapr_tce; |
| |
| /* XXX We have a race condition where we actually have a level triggered |
| * interrupt, but the infrastructure can't expose that yet, so the guest |
| * takes but ignores it, goes to sleep and never gets notified that there's |
| * still an interrupt pending. |
| * |
| * As a quick workaround, let's just wake up again 20 ms after we injected |
| * an interrupt. That way we can assure that we're always reinjecting |
| * interrupts in case the guest swallowed them. |
| */ |
| static QEMUTimer *idle_timer; |
| |
| static void kvm_kick_env(void *env) |
| { |
| qemu_cpu_kick(env); |
| } |
| |
| int kvm_arch_init(KVMState *s) |
| { |
| cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ); |
| cap_interrupt_level = kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL); |
| cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE); |
| cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS); |
| cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT); |
| cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA); |
| cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE); |
| |
| if (!cap_interrupt_level) { |
| fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the " |
| "VM to stall at times!\n"); |
| } |
| |
| return 0; |
| } |
| |
| static int kvm_arch_sync_sregs(CPUPPCState *cenv) |
| { |
| struct kvm_sregs sregs; |
| int ret; |
| |
| if (cenv->excp_model == POWERPC_EXCP_BOOKE) { |
| /* What we're really trying to say is "if we're on BookE, we use |
| the native PVR for now". This is the only sane way to check |
| it though, so we potentially confuse users that they can run |
| BookE guests on BookS. Let's hope nobody dares enough :) */ |
| return 0; |
| } else { |
| if (!cap_segstate) { |
| fprintf(stderr, "kvm error: missing PVR setting capability\n"); |
| return -ENOSYS; |
| } |
| } |
| |
| ret = kvm_vcpu_ioctl(cenv, KVM_GET_SREGS, &sregs); |
| if (ret) { |
| return ret; |
| } |
| |
| sregs.pvr = cenv->spr[SPR_PVR]; |
| return kvm_vcpu_ioctl(cenv, KVM_SET_SREGS, &sregs); |
| } |
| |
| /* Set up a shared TLB array with KVM */ |
| static int kvm_booke206_tlb_init(CPUPPCState *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; |
| } |
| |
| |
| #if defined(TARGET_PPC64) |
| static void kvm_get_fallback_smmu_info(CPUPPCState *env, |
| struct kvm_ppc_smmu_info *info) |
| { |
| memset(info, 0, sizeof(*info)); |
| |
| /* We don't have the new KVM_PPC_GET_SMMU_INFO ioctl, so |
| * need to "guess" what the supported page sizes are. |
| * |
| * For that to work we make a few assumptions: |
| * |
| * - If KVM_CAP_PPC_GET_PVINFO is supported we are running "PR" |
| * KVM which only supports 4K and 16M pages, but supports them |
| * regardless of the backing store characteritics. We also don't |
| * support 1T segments. |
| * |
| * This is safe as if HV KVM ever supports that capability or PR |
| * KVM grows supports for more page/segment sizes, those versions |
| * will have implemented KVM_CAP_PPC_GET_SMMU_INFO and thus we |
| * will not hit this fallback |
| * |
| * - Else we are running HV KVM. This means we only support page |
| * sizes that fit in the backing store. Additionally we only |
| * advertize 64K pages if the processor is ARCH 2.06 and we assume |
| * P7 encodings for the SLB and hash table. Here too, we assume |
| * support for any newer processor will mean a kernel that |
| * implements KVM_CAP_PPC_GET_SMMU_INFO and thus doesn't hit |
| * this fallback. |
| */ |
| if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO)) { |
| /* No flags */ |
| info->flags = 0; |
| info->slb_size = 64; |
| |
| /* Standard 4k base page size segment */ |
| info->sps[0].page_shift = 12; |
| info->sps[0].slb_enc = 0; |
| info->sps[0].enc[0].page_shift = 12; |
| info->sps[0].enc[0].pte_enc = 0; |
| |
| /* Standard 16M large page size segment */ |
| info->sps[1].page_shift = 24; |
| info->sps[1].slb_enc = SLB_VSID_L; |
| info->sps[1].enc[0].page_shift = 24; |
| info->sps[1].enc[0].pte_enc = 0; |
| } else { |
| int i = 0; |
| |
| /* HV KVM has backing store size restrictions */ |
| info->flags = KVM_PPC_PAGE_SIZES_REAL; |
| |
| if (env->mmu_model & POWERPC_MMU_1TSEG) { |
| info->flags |= KVM_PPC_1T_SEGMENTS; |
| } |
| |
| if (env->mmu_model == POWERPC_MMU_2_06) { |
| info->slb_size = 32; |
| } else { |
| info->slb_size = 64; |
| } |
| |
| /* Standard 4k base page size segment */ |
| info->sps[i].page_shift = 12; |
| info->sps[i].slb_enc = 0; |
| info->sps[i].enc[0].page_shift = 12; |
| info->sps[i].enc[0].pte_enc = 0; |
| i++; |
| |
| /* 64K on MMU 2.06 */ |
| if (env->mmu_model == POWERPC_MMU_2_06) { |
| info->sps[i].page_shift = 16; |
| info->sps[i].slb_enc = 0x110; |
| info->sps[i].enc[0].page_shift = 16; |
| info->sps[i].enc[0].pte_enc = 1; |
| i++; |
| } |
| |
| /* Standard 16M large page size segment */ |
| info->sps[i].page_shift = 24; |
| info->sps[i].slb_enc = SLB_VSID_L; |
| info->sps[i].enc[0].page_shift = 24; |
| info->sps[i].enc[0].pte_enc = 0; |
| } |
| } |
| |
| static void kvm_get_smmu_info(CPUPPCState *env, struct kvm_ppc_smmu_info *info) |
| { |
| int ret; |
| |
| if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_SMMU_INFO)) { |
| ret = kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_SMMU_INFO, info); |
| if (ret == 0) { |
| return; |
| } |
| } |
| |
| kvm_get_fallback_smmu_info(env, info); |
| } |
| |
| static long getrampagesize(void) |
| { |
| struct statfs fs; |
| int ret; |
| |
| if (!mem_path) { |
| /* guest RAM is backed by normal anonymous pages */ |
| return getpagesize(); |
| } |
| |
| do { |
| ret = statfs(mem_path, &fs); |
| } while (ret != 0 && errno == EINTR); |
| |
| if (ret != 0) { |
| fprintf(stderr, "Couldn't statfs() memory path: %s\n", |
| strerror(errno)); |
| exit(1); |
| } |
| |
| #define HUGETLBFS_MAGIC 0x958458f6 |
| |
| if (fs.f_type != HUGETLBFS_MAGIC) { |
| /* Explicit mempath, but it's ordinary pages */ |
| return getpagesize(); |
| } |
| |
| /* It's hugepage, return the huge page size */ |
| return fs.f_bsize; |
| } |
| |
| static bool kvm_valid_page_size(uint32_t flags, long rampgsize, uint32_t shift) |
| { |
| if (!(flags & KVM_PPC_PAGE_SIZES_REAL)) { |
| return true; |
| } |
| |
| return (1ul << shift) <= rampgsize; |
| } |
| |
| static void kvm_fixup_page_sizes(CPUPPCState *env) |
| { |
| static struct kvm_ppc_smmu_info smmu_info; |
| static bool has_smmu_info; |
| long rampagesize; |
| int iq, ik, jq, jk; |
| |
| /* We only handle page sizes for 64-bit server guests for now */ |
| if (!(env->mmu_model & POWERPC_MMU_64)) { |
| return; |
| } |
| |
| /* Collect MMU info from kernel if not already */ |
| if (!has_smmu_info) { |
| kvm_get_smmu_info(env, &smmu_info); |
| has_smmu_info = true; |
| } |
| |
| rampagesize = getrampagesize(); |
| |
| /* Convert to QEMU form */ |
| memset(&env->sps, 0, sizeof(env->sps)); |
| |
| for (ik = iq = 0; ik < KVM_PPC_PAGE_SIZES_MAX_SZ; ik++) { |
| struct ppc_one_seg_page_size *qsps = &env->sps.sps[iq]; |
| struct kvm_ppc_one_seg_page_size *ksps = &smmu_info.sps[ik]; |
| |
| if (!kvm_valid_page_size(smmu_info.flags, rampagesize, |
| ksps->page_shift)) { |
| continue; |
| } |
| qsps->page_shift = ksps->page_shift; |
| qsps->slb_enc = ksps->slb_enc; |
| for (jk = jq = 0; jk < KVM_PPC_PAGE_SIZES_MAX_SZ; jk++) { |
| if (!kvm_valid_page_size(smmu_info.flags, rampagesize, |
| ksps->enc[jk].page_shift)) { |
| continue; |
| } |
| qsps->enc[jq].page_shift = ksps->enc[jk].page_shift; |
| qsps->enc[jq].pte_enc = ksps->enc[jk].pte_enc; |
| if (++jq >= PPC_PAGE_SIZES_MAX_SZ) { |
| break; |
| } |
| } |
| if (++iq >= PPC_PAGE_SIZES_MAX_SZ) { |
| break; |
| } |
| } |
| env->slb_nr = smmu_info.slb_size; |
| if (smmu_info.flags & KVM_PPC_1T_SEGMENTS) { |
| env->mmu_model |= POWERPC_MMU_1TSEG; |
| } else { |
| env->mmu_model &= ~POWERPC_MMU_1TSEG; |
| } |
| } |
| #else /* defined (TARGET_PPC64) */ |
| |
| static inline void kvm_fixup_page_sizes(CPUPPCState *env) |
| { |
| } |
| |
| #endif /* !defined (TARGET_PPC64) */ |
| |
| int kvm_arch_init_vcpu(CPUPPCState *cenv) |
| { |
| int ret; |
| |
| /* Gather server mmu info from KVM and update the CPU state */ |
| kvm_fixup_page_sizes(cenv); |
| |
| /* Synchronize sregs with kvm */ |
| ret = kvm_arch_sync_sregs(cenv); |
| if (ret) { |
| return ret; |
| } |
| |
| 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; |
| } |
| |
| void kvm_arch_reset_vcpu(CPUPPCState *env) |
| { |
| } |
| |
| static void kvm_sw_tlb_put(CPUPPCState *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(CPUPPCState *env, int level) |
| { |
| struct kvm_regs regs; |
| int ret; |
| int i; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
| if (ret < 0) |
| return ret; |
| |
| regs.ctr = env->ctr; |
| regs.lr = env->lr; |
| regs.xer = env->xer; |
| regs.msr = env->msr; |
| regs.pc = env->nip; |
| |
| regs.srr0 = env->spr[SPR_SRR0]; |
| regs.srr1 = env->spr[SPR_SRR1]; |
| |
| regs.sprg0 = env->spr[SPR_SPRG0]; |
| regs.sprg1 = env->spr[SPR_SPRG1]; |
| regs.sprg2 = env->spr[SPR_SPRG2]; |
| regs.sprg3 = env->spr[SPR_SPRG3]; |
| regs.sprg4 = env->spr[SPR_SPRG4]; |
| regs.sprg5 = env->spr[SPR_SPRG5]; |
| regs.sprg6 = env->spr[SPR_SPRG6]; |
| regs.sprg7 = env->spr[SPR_SPRG7]; |
| |
| regs.pid = env->spr[SPR_BOOKE_PID]; |
| |
| for (i = 0;i < 32; i++) |
| regs.gpr[i] = env->gpr[i]; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); |
| if (ret < 0) |
| return ret; |
| |
| if (env->tlb_dirty) { |
| kvm_sw_tlb_put(env); |
| env->tlb_dirty = false; |
| } |
| |
| return ret; |
| } |
| |
| int kvm_arch_get_registers(CPUPPCState *env) |
| { |
| struct kvm_regs regs; |
| struct kvm_sregs sregs; |
| uint32_t cr; |
| int i, ret; |
| |
| ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
| if (ret < 0) |
| return ret; |
| |
| cr = regs.cr; |
| for (i = 7; i >= 0; i--) { |
| env->crf[i] = cr & 15; |
| cr >>= 4; |
| } |
| |
| env->ctr = regs.ctr; |
| env->lr = regs.lr; |
| env->xer = regs.xer; |
| env->msr = regs.msr; |
| env->nip = regs.pc; |
| |
| env->spr[SPR_SRR0] = regs.srr0; |
| env->spr[SPR_SRR1] = regs.srr1; |
| |
| env->spr[SPR_SPRG0] = regs.sprg0; |
| env->spr[SPR_SPRG1] = regs.sprg1; |
| env->spr[SPR_SPRG2] = regs.sprg2; |
| env->spr[SPR_SPRG3] = regs.sprg3; |
| env->spr[SPR_SPRG4] = regs.sprg4; |
| env->spr[SPR_SPRG5] = regs.sprg5; |
| env->spr[SPR_SPRG6] = regs.sprg6; |
| env->spr[SPR_SPRG7] = regs.sprg7; |
| |
| env->spr[SPR_BOOKE_PID] = regs.pid; |
| |
| for (i = 0;i < 32; i++) |
| env->gpr[i] = regs.gpr[i]; |
| |
| if (cap_booke_sregs) { |
| ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_BASE) { |
| env->spr[SPR_BOOKE_CSRR0] = sregs.u.e.csrr0; |
| env->spr[SPR_BOOKE_CSRR1] = sregs.u.e.csrr1; |
| env->spr[SPR_BOOKE_ESR] = sregs.u.e.esr; |
| env->spr[SPR_BOOKE_DEAR] = sregs.u.e.dear; |
| env->spr[SPR_BOOKE_MCSR] = sregs.u.e.mcsr; |
| env->spr[SPR_BOOKE_TSR] = sregs.u.e.tsr; |
| env->spr[SPR_BOOKE_TCR] = sregs.u.e.tcr; |
| env->spr[SPR_DECR] = sregs.u.e.dec; |
| env->spr[SPR_TBL] = sregs.u.e.tb & 0xffffffff; |
| env->spr[SPR_TBU] = sregs.u.e.tb >> 32; |
| env->spr[SPR_VRSAVE] = sregs.u.e.vrsave; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_ARCH206) { |
| env->spr[SPR_BOOKE_PIR] = sregs.u.e.pir; |
| env->spr[SPR_BOOKE_MCSRR0] = sregs.u.e.mcsrr0; |
| env->spr[SPR_BOOKE_MCSRR1] = sregs.u.e.mcsrr1; |
| env->spr[SPR_BOOKE_DECAR] = sregs.u.e.decar; |
| env->spr[SPR_BOOKE_IVPR] = sregs.u.e.ivpr; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_64) { |
| env->spr[SPR_BOOKE_EPCR] = sregs.u.e.epcr; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_SPRG8) { |
| env->spr[SPR_BOOKE_SPRG8] = sregs.u.e.sprg8; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_IVOR) { |
| env->spr[SPR_BOOKE_IVOR0] = sregs.u.e.ivor_low[0]; |
| env->spr[SPR_BOOKE_IVOR1] = sregs.u.e.ivor_low[1]; |
| env->spr[SPR_BOOKE_IVOR2] = sregs.u.e.ivor_low[2]; |
| env->spr[SPR_BOOKE_IVOR3] = sregs.u.e.ivor_low[3]; |
| env->spr[SPR_BOOKE_IVOR4] = sregs.u.e.ivor_low[4]; |
| env->spr[SPR_BOOKE_IVOR5] = sregs.u.e.ivor_low[5]; |
| env->spr[SPR_BOOKE_IVOR6] = sregs.u.e.ivor_low[6]; |
| env->spr[SPR_BOOKE_IVOR7] = sregs.u.e.ivor_low[7]; |
| env->spr[SPR_BOOKE_IVOR8] = sregs.u.e.ivor_low[8]; |
| env->spr[SPR_BOOKE_IVOR9] = sregs.u.e.ivor_low[9]; |
| env->spr[SPR_BOOKE_IVOR10] = sregs.u.e.ivor_low[10]; |
| env->spr[SPR_BOOKE_IVOR11] = sregs.u.e.ivor_low[11]; |
| env->spr[SPR_BOOKE_IVOR12] = sregs.u.e.ivor_low[12]; |
| env->spr[SPR_BOOKE_IVOR13] = sregs.u.e.ivor_low[13]; |
| env->spr[SPR_BOOKE_IVOR14] = sregs.u.e.ivor_low[14]; |
| env->spr[SPR_BOOKE_IVOR15] = sregs.u.e.ivor_low[15]; |
| |
| if (sregs.u.e.features & KVM_SREGS_E_SPE) { |
| env->spr[SPR_BOOKE_IVOR32] = sregs.u.e.ivor_high[0]; |
| env->spr[SPR_BOOKE_IVOR33] = sregs.u.e.ivor_high[1]; |
| env->spr[SPR_BOOKE_IVOR34] = sregs.u.e.ivor_high[2]; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_PM) { |
| env->spr[SPR_BOOKE_IVOR35] = sregs.u.e.ivor_high[3]; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_PC) { |
| env->spr[SPR_BOOKE_IVOR36] = sregs.u.e.ivor_high[4]; |
| env->spr[SPR_BOOKE_IVOR37] = sregs.u.e.ivor_high[5]; |
| } |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_ARCH206_MMU) { |
| env->spr[SPR_BOOKE_MAS0] = sregs.u.e.mas0; |
| env->spr[SPR_BOOKE_MAS1] = sregs.u.e.mas1; |
| env->spr[SPR_BOOKE_MAS2] = sregs.u.e.mas2; |
| env->spr[SPR_BOOKE_MAS3] = sregs.u.e.mas7_3 & 0xffffffff; |
| env->spr[SPR_BOOKE_MAS4] = sregs.u.e.mas4; |
| env->spr[SPR_BOOKE_MAS6] = sregs.u.e.mas6; |
| env->spr[SPR_BOOKE_MAS7] = sregs.u.e.mas7_3 >> 32; |
| env->spr[SPR_MMUCFG] = sregs.u.e.mmucfg; |
| env->spr[SPR_BOOKE_TLB0CFG] = sregs.u.e.tlbcfg[0]; |
| env->spr[SPR_BOOKE_TLB1CFG] = sregs.u.e.tlbcfg[1]; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_EXP) { |
| env->spr[SPR_BOOKE_EPR] = sregs.u.e.epr; |
| } |
| |
| if (sregs.u.e.features & KVM_SREGS_E_PD) { |
| env->spr[SPR_BOOKE_EPLC] = sregs.u.e.eplc; |
| env->spr[SPR_BOOKE_EPSC] = sregs.u.e.epsc; |
| } |
| |
| if (sregs.u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { |
| env->spr[SPR_E500_SVR] = sregs.u.e.impl.fsl.svr; |
| env->spr[SPR_Exxx_MCAR] = sregs.u.e.impl.fsl.mcar; |
| env->spr[SPR_HID0] = sregs.u.e.impl.fsl.hid0; |
| |
| if (sregs.u.e.impl.fsl.features & KVM_SREGS_E_FSL_PIDn) { |
| env->spr[SPR_BOOKE_PID1] = sregs.u.e.impl.fsl.pid1; |
| env->spr[SPR_BOOKE_PID2] = sregs.u.e.impl.fsl.pid2; |
| } |
| } |
| } |
| |
| if (cap_segstate) { |
| ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| ppc_store_sdr1(env, sregs.u.s.sdr1); |
| |
| /* Sync SLB */ |
| #ifdef TARGET_PPC64 |
| for (i = 0; i < 64; i++) { |
| ppc_store_slb(env, sregs.u.s.ppc64.slb[i].slbe, |
| sregs.u.s.ppc64.slb[i].slbv); |
| } |
| #endif |
| |
| /* Sync SRs */ |
| for (i = 0; i < 16; i++) { |
| env->sr[i] = sregs.u.s.ppc32.sr[i]; |
| } |
| |
| /* Sync BATs */ |
| for (i = 0; i < 8; i++) { |
| env->DBAT[0][i] = sregs.u.s.ppc32.dbat[i] & 0xffffffff; |
| env->DBAT[1][i] = sregs.u.s.ppc32.dbat[i] >> 32; |
| env->IBAT[0][i] = sregs.u.s.ppc32.ibat[i] & 0xffffffff; |
| env->IBAT[1][i] = sregs.u.s.ppc32.ibat[i] >> 32; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int kvmppc_set_interrupt(CPUPPCState *env, int irq, int level) |
| { |
| unsigned virq = level ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET; |
| |
| if (irq != PPC_INTERRUPT_EXT) { |
| return 0; |
| } |
| |
| if (!kvm_enabled() || !cap_interrupt_unset || !cap_interrupt_level) { |
| return 0; |
| } |
| |
| kvm_vcpu_ioctl(env, KVM_INTERRUPT, &virq); |
| |
| return 0; |
| } |
| |
| #if defined(TARGET_PPCEMB) |
| #define PPC_INPUT_INT PPC40x_INPUT_INT |
| #elif defined(TARGET_PPC64) |
| #define PPC_INPUT_INT PPC970_INPUT_INT |
| #else |
| #define PPC_INPUT_INT PPC6xx_INPUT_INT |
| #endif |
| |
| void kvm_arch_pre_run(CPUPPCState *env, struct kvm_run *run) |
| { |
| int r; |
| unsigned irq; |
| |
| /* PowerPC QEMU tracks the various core input pins (interrupt, critical |
| * interrupt, reset, etc) in PPC-specific env->irq_input_state. */ |
| if (!cap_interrupt_level && |
| run->ready_for_interrupt_injection && |
| (env->interrupt_request & CPU_INTERRUPT_HARD) && |
| (env->irq_input_state & (1<<PPC_INPUT_INT))) |
| { |
| /* For now KVM disregards the 'irq' argument. However, in the |
| * future KVM could cache it in-kernel to avoid a heavyweight exit |
| * when reading the UIC. |
| */ |
| irq = KVM_INTERRUPT_SET; |
| |
| dprintf("injected interrupt %d\n", irq); |
| r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq); |
| if (r < 0) |
| printf("cpu %d fail inject %x\n", env->cpu_index, irq); |
| |
| /* Always wake up soon in case the interrupt was level based */ |
| qemu_mod_timer(idle_timer, qemu_get_clock_ns(vm_clock) + |
| (get_ticks_per_sec() / 50)); |
| } |
| |
| /* We don't know if there are more interrupts pending after this. However, |
| * the guest will return to userspace in the course of handling this one |
| * anyways, so we will get a chance to deliver the rest. */ |
| } |
| |
| void kvm_arch_post_run(CPUPPCState *env, struct kvm_run *run) |
| { |
| } |
| |
| int kvm_arch_process_async_events(CPUPPCState *env) |
| { |
| return env->halted; |
| } |
| |
| static int kvmppc_handle_halt(CPUPPCState *env) |
| { |
| if (!(env->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) { |
| env->halted = 1; |
| env->exception_index = EXCP_HLT; |
| } |
| |
| return 0; |
| } |
| |
| /* map dcr access to existing qemu dcr emulation */ |
| static int kvmppc_handle_dcr_read(CPUPPCState *env, uint32_t dcrn, uint32_t *data) |
| { |
| if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0) |
| fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn); |
| |
| return 0; |
| } |
| |
| static int kvmppc_handle_dcr_write(CPUPPCState *env, uint32_t dcrn, uint32_t data) |
| { |
| if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0) |
| fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn); |
| |
| return 0; |
| } |
| |
| int kvm_arch_handle_exit(CPUPPCState *env, struct kvm_run *run) |
| { |
| int ret; |
| |
| switch (run->exit_reason) { |
| case KVM_EXIT_DCR: |
| if (run->dcr.is_write) { |
| dprintf("handle dcr write\n"); |
| ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data); |
| } else { |
| dprintf("handle dcr read\n"); |
| ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data); |
| } |
| break; |
| case KVM_EXIT_HLT: |
| 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; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int read_cpuinfo(const char *field, char *value, int len) |
| { |
| FILE *f; |
| int ret = -1; |
| int field_len = strlen(field); |
| char line[512]; |
| |
| f = fopen("/proc/cpuinfo", "r"); |
| if (!f) { |
| return -1; |
| } |
| |
| do { |
| if(!fgets(line, sizeof(line), f)) { |
| break; |
| } |
| if (!strncmp(line, field, field_len)) { |
| strncpy(value, line, len); |
| ret = 0; |
| break; |
| } |
| } while(*line); |
| |
| fclose(f); |
| |
| return ret; |
| } |
| |
| uint32_t kvmppc_get_tbfreq(void) |
| { |
| char line[512]; |
| char *ns; |
| uint32_t retval = get_ticks_per_sec(); |
| |
| if (read_cpuinfo("timebase", line, sizeof(line))) { |
| return retval; |
| } |
| |
| if (!(ns = strchr(line, ':'))) { |
| return retval; |
| } |
| |
| ns++; |
| |
| retval = atoi(ns); |
| 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; |
| } |
| |
| /* Read a CPU node property from the host device tree that's a single |
| * integer (32-bit or 64-bit). Returns 0 if anything goes wrong |
| * (can't find or open the property, or doesn't understand the |
| * format) */ |
| static uint64_t kvmppc_read_int_cpu_dt(const char *propname) |
| { |
| char buf[PATH_MAX]; |
| union { |
| uint32_t v32; |
| uint64_t v64; |
| } u; |
| FILE *f; |
| int len; |
| |
| if (kvmppc_find_cpu_dt(buf, sizeof(buf))) { |
| return -1; |
| } |
| |
| strncat(buf, "/", sizeof(buf) - strlen(buf)); |
| strncat(buf, propname, sizeof(buf) - strlen(buf)); |
| |
| f = fopen(buf, "rb"); |
| if (!f) { |
| return -1; |
| } |
| |
| len = fread(&u, 1, sizeof(u), f); |
| fclose(f); |
| switch (len) { |
| case 4: |
| /* property is a 32-bit quantity */ |
| return be32_to_cpu(u.v32); |
| case 8: |
| return be64_to_cpu(u.v64); |
| } |
| |
| return 0; |
| } |
| |
| uint64_t kvmppc_get_clockfreq(void) |
| { |
| return kvmppc_read_int_cpu_dt("clock-frequency"); |
| } |
| |
| uint32_t kvmppc_get_vmx(void) |
| { |
| return kvmppc_read_int_cpu_dt("ibm,vmx"); |
| } |
| |
| uint32_t kvmppc_get_dfp(void) |
| { |
| return kvmppc_read_int_cpu_dt("ibm,dfp"); |
| } |
| |
| int kvmppc_get_hypercall(CPUPPCState *env, uint8_t *buf, int buf_len) |
| { |
| uint32_t *hc = (uint32_t*)buf; |
| |
| struct kvm_ppc_pvinfo pvinfo; |
| |
| if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO) && |
| !kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_PVINFO, &pvinfo)) { |
| memcpy(buf, pvinfo.hcall, buf_len); |
| |
| return 0; |
| } |
| |
| /* |
| * Fallback to always fail hypercalls: |
| * |
| * li r3, -1 |
| * nop |
| * nop |
| * nop |
| */ |
| |
| hc[0] = 0x3860ffff; |
| hc[1] = 0x60000000; |
| hc[2] = 0x60000000; |
| hc[3] = 0x60000000; |
| |
| return 0; |
| } |
| |
| void kvmppc_set_papr(CPUPPCState *env) |
| { |
| struct kvm_enable_cap cap = {}; |
| struct kvm_one_reg reg = {}; |
| struct kvm_sregs sregs = {}; |
| int ret; |
| uint64_t hior = env->spr[SPR_HIOR]; |
| |
| 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_REG_PPC_HIOR; |
| reg.addr = (uintptr_t)&hior; |
| ret = kvm_vcpu_ioctl(env, KVM_SET_ONE_REG, ®); |
| if (ret) { |
| fprintf(stderr, "Couldn't set HIOR. Maybe you're running an old \n" |
| "kernel with support for HV KVM but no PAPR PR \n" |
| "KVM in which case things will work. If they don't \n" |
| "please update your host kernel!\n"); |
| } |
| |
| /* 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"); |
| } |
| |
| int kvmppc_smt_threads(void) |
| { |
| return cap_ppc_smt ? cap_ppc_smt : 1; |
| } |
| |
| off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem) |
| { |
| void *rma; |
| off_t size; |
| int fd; |
| struct kvm_allocate_rma ret; |
| MemoryRegion *rma_region; |
| |
| /* If cap_ppc_rma == 0, contiguous RMA allocation is not supported |
| * if cap_ppc_rma == 1, contiguous RMA allocation is supported, but |
| * not necessary on this hardware |
| * if cap_ppc_rma == 2, contiguous RMA allocation is needed on this hardware |
| * |
| * FIXME: We should allow the user to force contiguous RMA |
| * allocation in the cap_ppc_rma==1 case. |
| */ |
| if (cap_ppc_rma < 2) { |
| return 0; |
| } |
| |
| fd = kvm_vm_ioctl(kvm_state, KVM_ALLOCATE_RMA, &ret); |
| if (fd < 0) { |
| fprintf(stderr, "KVM: Error on KVM_ALLOCATE_RMA: %s\n", |
| strerror(errno)); |
| return -1; |
| } |
| |
| size = MIN(ret.rma_size, 256ul << 20); |
| |
| rma = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
| if (rma == MAP_FAILED) { |
| fprintf(stderr, "KVM: Error mapping RMA: %s\n", strerror(errno)); |
| return -1; |
| }; |
| |
| rma_region = g_new(MemoryRegion, 1); |
| memory_region_init_ram_ptr(rma_region, name, size, rma); |
| vmstate_register_ram_global(rma_region); |
| memory_region_add_subregion(sysmem, 0, rma_region); |
| |
| return size; |
| } |
| |
| void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd) |
| { |
| struct kvm_create_spapr_tce args = { |
| .liobn = liobn, |
| .window_size = window_size, |
| }; |
| long len; |
| int fd; |
| void *table; |
| |
| /* Must set fd to -1 so we don't try to munmap when called for |
| * destroying the table, which the upper layers -will- do |
| */ |
| *pfd = -1; |
| if (!cap_spapr_tce) { |
| return NULL; |
| } |
| |
| fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args); |
| if (fd < 0) { |
| fprintf(stderr, "KVM: Failed to create TCE table for liobn 0x%x\n", |
| liobn); |
| return NULL; |
| } |
| |
| len = (window_size / SPAPR_TCE_PAGE_SIZE) * sizeof(sPAPRTCE); |
| /* FIXME: round this up to page size */ |
| |
| table = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
| if (table == MAP_FAILED) { |
| fprintf(stderr, "KVM: Failed to map TCE table for liobn 0x%x\n", |
| liobn); |
| close(fd); |
| return NULL; |
| } |
| |
| *pfd = fd; |
| return table; |
| } |
| |
| int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t window_size) |
| { |
| long len; |
| |
| if (fd < 0) { |
| return -1; |
| } |
| |
| len = (window_size / SPAPR_TCE_PAGE_SIZE)*sizeof(sPAPRTCE); |
| if ((munmap(table, len) < 0) || |
| (close(fd) < 0)) { |
| fprintf(stderr, "KVM: Unexpected error removing TCE table: %s", |
| strerror(errno)); |
| /* Leak the table */ |
| } |
| |
| return 0; |
| } |
| |
| static inline uint32_t mfpvr(void) |
| { |
| uint32_t pvr; |
| |
| asm ("mfpvr %0" |
| : "=r"(pvr)); |
| return pvr; |
| } |
| |
| static void alter_insns(uint64_t *word, uint64_t flags, bool on) |
| { |
| if (on) { |
| *word |= flags; |
| } else { |
| *word &= ~flags; |
| } |
| } |
| |
| const ppc_def_t *kvmppc_host_cpu_def(void) |
| { |
| uint32_t host_pvr = mfpvr(); |
| const ppc_def_t *base_spec; |
| ppc_def_t *spec; |
| uint32_t vmx = kvmppc_get_vmx(); |
| uint32_t dfp = kvmppc_get_dfp(); |
| |
| base_spec = ppc_find_by_pvr(host_pvr); |
| |
| spec = g_malloc0(sizeof(*spec)); |
| memcpy(spec, base_spec, sizeof(*spec)); |
| |
| /* Now fix up the spec with information we can query from the host */ |
| |
| if (vmx != -1) { |
| /* Only override when we know what the host supports */ |
| alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0); |
| alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1); |
| } |
| if (dfp != -1) { |
| /* Only override when we know what the host supports */ |
| alter_insns(&spec->insns_flags2, PPC2_DFP, dfp); |
| } |
| |
| return spec; |
| } |
| |
| int kvmppc_fixup_cpu(CPUPPCState *env) |
| { |
| int smt; |
| |
| /* Adjust cpu index for SMT */ |
| smt = kvmppc_smt_threads(); |
| env->cpu_index = (env->cpu_index / smp_threads) * smt |
| + (env->cpu_index % smp_threads); |
| |
| return 0; |
| } |
| |
| |
| bool kvm_arch_stop_on_emulation_error(CPUPPCState *env) |
| { |
| return true; |
| } |
| |
| int kvm_arch_on_sigbus_vcpu(CPUPPCState *env, int code, void *addr) |
| { |
| return 1; |
| } |
| |
| int kvm_arch_on_sigbus(int code, void *addr) |
| { |
| return 1; |
| } |
