diff options
Diffstat (limited to 'exec.c')
| -rw-r--r-- | exec.c | 76 |
1 files changed, 16 insertions, 60 deletions
diff --git a/exec.c b/exec.c index 758af30cdf..231d6e5641 100644 --- a/exec.c +++ b/exec.c @@ -35,6 +35,7 @@ #include "sysemu/kvm.h" #include "sysemu/sysemu.h" #include "sysemu/tcg.h" +#include "sysemu/qtest.h" #include "qemu/timer.h" #include "qemu/config-file.h" #include "qemu/error-report.h" @@ -1667,59 +1668,18 @@ static int find_max_backend_pagesize(Object *obj, void *opaque) long qemu_minrampagesize(void) { long hpsize = LONG_MAX; - long mainrampagesize; - Object *memdev_root; - MachineState *ms = MACHINE(qdev_get_machine()); - - mainrampagesize = qemu_mempath_getpagesize(mem_path); - - /* it's possible we have memory-backend objects with - * hugepage-backed RAM. these may get mapped into system - * address space via -numa parameters or memory hotplug - * hooks. we want to take these into account, but we - * also want to make sure these supported hugepage - * sizes are applicable across the entire range of memory - * we may boot from, so we take the min across all - * backends, and assume normal pages in cases where a - * backend isn't backed by hugepages. - */ - memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); - } - if (hpsize == LONG_MAX) { - /* No additional memory regions found ==> Report main RAM page size */ - return mainrampagesize; - } - - /* If NUMA is disabled or the NUMA nodes are not backed with a - * memory-backend, then there is at least one node using "normal" RAM, - * so if its page size is smaller we have got to report that size instead. - */ - if (hpsize > mainrampagesize && - (ms->numa_state == NULL || - ms->numa_state->num_nodes == 0 || - ms->numa_state->nodes[0].node_memdev == NULL)) { - static bool warned; - if (!warned) { - error_report("Huge page support disabled (n/a for main memory)."); - warned = true; - } - return mainrampagesize; - } + Object *memdev_root = object_resolve_path("/objects", NULL); + object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize); return hpsize; } long qemu_maxrampagesize(void) { - long pagesize = qemu_mempath_getpagesize(mem_path); + long pagesize = 0; Object *memdev_root = object_resolve_path("/objects", NULL); - if (memdev_root) { - object_child_foreach(memdev_root, find_max_backend_pagesize, - &pagesize); - } + object_child_foreach(memdev_root, find_max_backend_pagesize, &pagesize); return pagesize; } #else @@ -1842,8 +1802,6 @@ static void *file_ram_alloc(RAMBlock *block, bool truncate, Error **errp) { - Error *err = NULL; - MachineState *ms = MACHINE(qdev_get_machine()); void *area; block->page_size = qemu_fd_getpagesize(fd); @@ -1899,15 +1857,6 @@ static void *file_ram_alloc(RAMBlock *block, return NULL; } - if (mem_prealloc) { - os_mem_prealloc(fd, area, memory, ms->smp.cpus, &err); - if (err) { - error_propagate(errp, err); - qemu_ram_munmap(fd, area, memory); - return NULL; - } - } - block->fd = fd; return area; } @@ -2305,8 +2254,15 @@ static void ram_block_add(RAMBlock *new_block, Error **errp, bool shared) if (new_block->host) { qemu_ram_setup_dump(new_block->host, new_block->max_length); qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); - /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */ - qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); + /* + * MADV_DONTFORK is also needed by KVM in absence of synchronous MMU + * Configure it unless the machine is a qtest server, in which case + * KVM is not used and it may be forked (eg for fuzzing purposes). + */ + if (!qtest_enabled()) { + qemu_madvise(new_block->host, new_block->max_length, + QEMU_MADV_DONTFORK); + } ram_block_notify_add(new_block->host, new_block->max_length); } } @@ -2348,9 +2304,9 @@ RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr, size = HOST_PAGE_ALIGN(size); file_size = get_file_size(fd); if (file_size > 0 && file_size < size) { - error_setg(errp, "backing store %s size 0x%" PRIx64 + error_setg(errp, "backing store size 0x%" PRIx64 " does not match 'size' option 0x" RAM_ADDR_FMT, - mem_path, file_size, size); + file_size, size); return NULL; } |