diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ppc/spapr.c | 130 |
1 files changed, 56 insertions, 74 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 2a81e8f8a9..907439a95b 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1063,81 +1063,55 @@ static int spapr_hpt_shift_for_ramsize(uint64_t ramsize) return shift; } -static void spapr_alloc_htab(sPAPRMachineState *spapr) -{ - long shift; - int index; - - /* allocate hash page table. For now we always make this 16mb, - * later we should probably make it scale to the size of guest - * RAM */ - - shift = kvmppc_reset_htab(spapr->htab_shift); - if (shift < 0) { - /* - * For HV KVM, host kernel will return -ENOMEM when requested - * HTAB size can't be allocated. - */ - error_setg(&error_abort, "Failed to allocate HTAB of requested size, try with smaller maxmem"); - } else if (shift > 0) { - /* - * Kernel handles htab, we don't need to allocate one - * - * Older kernels can fall back to lower HTAB shift values, - * but we don't allow booting of such guests. - */ - if (shift != spapr->htab_shift) { - error_setg(&error_abort, "Failed to allocate HTAB of requested size, try with smaller maxmem"); +static void spapr_reallocate_hpt(sPAPRMachineState *spapr, int shift, + Error **errp) +{ + long rc; + + /* Clean up any HPT info from a previous boot */ + g_free(spapr->htab); + spapr->htab = NULL; + spapr->htab_shift = 0; + close_htab_fd(spapr); + + rc = kvmppc_reset_htab(shift); + if (rc < 0) { + /* kernel-side HPT needed, but couldn't allocate one */ + error_setg_errno(errp, errno, + "Failed to allocate KVM HPT of order %d (try smaller maxmem?)", + shift); + /* This is almost certainly fatal, but if the caller really + * wants to carry on with shift == 0, it's welcome to try */ + } else if (rc > 0) { + /* kernel-side HPT allocated */ + if (rc != shift) { + error_setg(errp, + "Requested order %d HPT, but kernel allocated order %ld (try smaller maxmem?)", + shift, rc); } spapr->htab_shift = shift; kvmppc_kern_htab = true; } else { - /* Allocate htab */ - spapr->htab = qemu_memalign(HTAB_SIZE(spapr), HTAB_SIZE(spapr)); - - /* And clear it */ - memset(spapr->htab, 0, HTAB_SIZE(spapr)); - - for (index = 0; index < HTAB_SIZE(spapr) / HASH_PTE_SIZE_64; index++) { - DIRTY_HPTE(HPTE(spapr->htab, index)); - } - } -} - -/* - * Clear HTAB entries during reset. - * - * If host kernel has allocated HTAB, KVM_PPC_ALLOCATE_HTAB ioctl is - * used to clear HTAB. Otherwise QEMU-allocated HTAB is cleared manually. - */ -static void spapr_reset_htab(sPAPRMachineState *spapr) -{ - long shift; - int index; + /* kernel-side HPT not needed, allocate in userspace instead */ + size_t size = 1ULL << shift; + int i; - shift = kvmppc_reset_htab(spapr->htab_shift); - if (shift < 0) { - error_setg(&error_abort, "Failed to reset HTAB"); - } else if (shift > 0) { - if (shift != spapr->htab_shift) { - error_setg(&error_abort, "Requested HTAB allocation failed during reset"); + spapr->htab = qemu_memalign(size, size); + if (!spapr->htab) { + error_setg_errno(errp, errno, + "Could not allocate HPT of order %d", shift); + return; } - close_htab_fd(spapr); - } else { - memset(spapr->htab, 0, HTAB_SIZE(spapr)); + memset(spapr->htab, 0, size); + spapr->htab_shift = shift; + kvmppc_kern_htab = false; - for (index = 0; index < HTAB_SIZE(spapr) / HASH_PTE_SIZE_64; index++) { - DIRTY_HPTE(HPTE(spapr->htab, index)); + for (i = 0; i < size / HASH_PTE_SIZE_64; i++) { + DIRTY_HPTE(HPTE(spapr->htab, i)); } } - - /* Update the RMA size if necessary */ - if (spapr->vrma_adjust) { - spapr->rma_size = kvmppc_rma_size(spapr_node0_size(), - spapr->htab_shift); - } } static int find_unknown_sysbus_device(SysBusDevice *sbdev, void *opaque) @@ -1159,15 +1133,24 @@ static int find_unknown_sysbus_device(SysBusDevice *sbdev, void *opaque) static void ppc_spapr_reset(void) { - sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); + MachineState *machine = MACHINE(qdev_get_machine()); + sPAPRMachineState *spapr = SPAPR_MACHINE(machine); PowerPCCPU *first_ppc_cpu; uint32_t rtas_limit; /* Check for unknown sysbus devices */ foreach_dynamic_sysbus_device(find_unknown_sysbus_device, NULL); - /* Reset the hash table & recalc the RMA */ - spapr_reset_htab(spapr); + /* Allocate and/or reset the hash page table */ + spapr_reallocate_hpt(spapr, + spapr_hpt_shift_for_ramsize(machine->maxram_size), + &error_fatal); + + /* Update the RMA size if necessary */ + if (spapr->vrma_adjust) { + spapr->rma_size = kvmppc_rma_size(spapr_node0_size(), + spapr->htab_shift); + } qemu_devices_reset(); @@ -1547,10 +1530,12 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) section_hdr = qemu_get_be32(f); if (section_hdr) { - /* First section, just the hash shift */ - if (spapr->htab_shift != section_hdr) { - error_report("htab_shift mismatch: source %d target %d", - section_hdr, spapr->htab_shift); + Error *local_err; + + /* First section gives the htab size */ + spapr_reallocate_hpt(spapr, section_hdr, &local_err); + if (local_err) { + error_report_err(local_err); return -EINVAL; } return 0; @@ -1803,9 +1788,6 @@ static void ppc_spapr_init(MachineState *machine) /* Setup a load limit for the ramdisk leaving room for SLOF and FDT */ load_limit = MIN(spapr->rma_size, RTAS_MAX_ADDR) - FW_OVERHEAD; - spapr->htab_shift = spapr_hpt_shift_for_ramsize(machine->maxram_size); - spapr_alloc_htab(spapr); - /* Set up Interrupt Controller before we create the VCPUs */ spapr->icp = xics_system_init(machine, DIV_ROUND_UP(max_cpus * kvmppc_smt_threads(), |