diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ppc/spapr.c | 106 |
1 files changed, 84 insertions, 22 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 734a782..7144829 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -735,17 +735,27 @@ static int htab_save_setup(QEMUFile *f, void *opaque) { sPAPREnvironment *spapr = opaque; - spapr->htab_save_index = 0; - spapr->htab_first_pass = true; - /* "Iteration" header */ qemu_put_be32(f, spapr->htab_shift); + if (spapr->htab) { + spapr->htab_save_index = 0; + spapr->htab_first_pass = true; + } else { + assert(kvm_enabled()); + + spapr->htab_fd = kvmppc_get_htab_fd(false); + if (spapr->htab_fd < 0) { + fprintf(stderr, "Unable to open fd for reading hash table from KVM: %s\n", + strerror(errno)); + return -1; + } + } + + return 0; } -#define MAX_ITERATION_NS 5000000 /* 5 ms */ - static void htab_save_first_pass(QEMUFile *f, sPAPREnvironment *spapr, int64_t max_ns) { @@ -796,8 +806,8 @@ static void htab_save_first_pass(QEMUFile *f, sPAPREnvironment *spapr, spapr->htab_save_index = index; } -static bool htab_save_later_pass(QEMUFile *f, sPAPREnvironment *spapr, - int64_t max_ns) +static int htab_save_later_pass(QEMUFile *f, sPAPREnvironment *spapr, + int64_t max_ns) { bool final = max_ns < 0; int htabslots = HTAB_SIZE(spapr) / HASH_PTE_SIZE_64; @@ -870,21 +880,32 @@ static bool htab_save_later_pass(QEMUFile *f, sPAPREnvironment *spapr, spapr->htab_save_index = index; - return (examined >= htabslots) && (sent == 0); + return (examined >= htabslots) && (sent == 0) ? 1 : 0; } +#define MAX_ITERATION_NS 5000000 /* 5 ms */ +#define MAX_KVM_BUF_SIZE 2048 + static int htab_save_iterate(QEMUFile *f, void *opaque) { sPAPREnvironment *spapr = opaque; - bool nothingleft = false;; + int rc = 0; /* Iteration header */ qemu_put_be32(f, 0); - if (spapr->htab_first_pass) { + if (!spapr->htab) { + assert(kvm_enabled()); + + rc = kvmppc_save_htab(f, spapr->htab_fd, + MAX_KVM_BUF_SIZE, MAX_ITERATION_NS); + if (rc < 0) { + return rc; + } + } else if (spapr->htab_first_pass) { htab_save_first_pass(f, spapr, MAX_ITERATION_NS); } else { - nothingleft = htab_save_later_pass(f, spapr, MAX_ITERATION_NS); + rc = htab_save_later_pass(f, spapr, MAX_ITERATION_NS); } /* End marker */ @@ -892,7 +913,7 @@ static int htab_save_iterate(QEMUFile *f, void *opaque) qemu_put_be16(f, 0); qemu_put_be16(f, 0); - return nothingleft ? 1 : 0; + return rc; } static int htab_save_complete(QEMUFile *f, void *opaque) @@ -902,7 +923,20 @@ static int htab_save_complete(QEMUFile *f, void *opaque) /* Iteration header */ qemu_put_be32(f, 0); - htab_save_later_pass(f, spapr, -1); + if (!spapr->htab) { + int rc; + + assert(kvm_enabled()); + + rc = kvmppc_save_htab(f, spapr->htab_fd, MAX_KVM_BUF_SIZE, -1); + if (rc < 0) { + return rc; + } + close(spapr->htab_fd); + spapr->htab_fd = -1; + } else { + htab_save_later_pass(f, spapr, -1); + } /* End marker */ qemu_put_be32(f, 0); @@ -916,6 +950,7 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) { sPAPREnvironment *spapr = opaque; uint32_t section_hdr; + int fd = -1; if (version_id < 1 || version_id > 1) { fprintf(stderr, "htab_load() bad version\n"); @@ -932,6 +967,16 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) return 0; } + if (!spapr->htab) { + assert(kvm_enabled()); + + fd = kvmppc_get_htab_fd(true); + if (fd < 0) { + fprintf(stderr, "Unable to open fd to restore KVM hash table: %s\n", + strerror(errno)); + } + } + while (true) { uint32_t index; uint16_t n_valid, n_invalid; @@ -945,24 +990,41 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id) break; } - if ((index + n_valid + n_invalid) >= + if ((index + n_valid + n_invalid) > (HTAB_SIZE(spapr) / HASH_PTE_SIZE_64)) { /* Bad index in stream */ fprintf(stderr, "htab_load() bad index %d (%hd+%hd entries) " - "in htab stream\n", index, n_valid, n_invalid); + "in htab stream (htab_shift=%d)\n", index, n_valid, n_invalid, + spapr->htab_shift); return -EINVAL; } - if (n_valid) { - qemu_get_buffer(f, HPTE(spapr->htab, index), - HASH_PTE_SIZE_64 * n_valid); - } - if (n_invalid) { - memset(HPTE(spapr->htab, index + n_valid), 0, - HASH_PTE_SIZE_64 * n_invalid); + if (spapr->htab) { + if (n_valid) { + qemu_get_buffer(f, HPTE(spapr->htab, index), + HASH_PTE_SIZE_64 * n_valid); + } + if (n_invalid) { + memset(HPTE(spapr->htab, index + n_valid), 0, + HASH_PTE_SIZE_64 * n_invalid); + } + } else { + int rc; + + assert(fd >= 0); + + rc = kvmppc_load_htab_chunk(f, fd, index, n_valid, n_invalid); + if (rc < 0) { + return rc; + } } } + if (!spapr->htab) { + assert(fd >= 0); + close(fd); + } + return 0; } |