#include "sysemu/hw_accel.h"
#include "exec/address-spaces.h"
#include "sysemu/xen-mapcache.h"
-#include "trace-root.h"
+#include "trace/trace-root.h"
#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
#include <linux/falloc.h>
#include "monitor/monitor.h"
+#ifdef CONFIG_LIBDAXCTL
+#include <daxctl/libdaxctl.h>
+#endif
+
//#define DEBUG_SUBPAGE
#if !defined(CONFIG_USER_ONLY)
static MemoryRegion io_mem_unassigned;
#endif
-CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
-
-/* current CPU in the current thread. It is only valid inside
- cpu_exec() */
-__thread CPUState *current_cpu;
-
uintptr_t qemu_host_page_size;
intptr_t qemu_host_page_mask;
}
};
-#endif
-
-CPUState *qemu_get_cpu(int index)
-{
- CPUState *cpu;
-
- CPU_FOREACH(cpu) {
- if (cpu->cpu_index == index) {
- return cpu;
- }
- }
-
- return NULL;
-}
-
-#if !defined(CONFIG_USER_ONLY)
void cpu_address_space_init(CPUState *cpu, int asidx,
const char *prefix, MemoryRegion *mr)
{
{
CPUClass *cc = CPU_GET_CLASS(cpu);
+ tlb_destroy(cpu);
cpu_list_remove(cpu);
if (cc->vmsd != NULL) {
int flags, CPUWatchpoint **watchpoint)
{
CPUWatchpoint *wp;
+ vaddr in_page;
/* forbid ranges which are empty or run off the end of the address space */
if (len == 0 || (addr + len - 1) < addr) {
QTAILQ_INSERT_TAIL(&cpu->watchpoints, wp, entry);
}
- tlb_flush_page(cpu, addr);
+ in_page = -(addr | TARGET_PAGE_MASK);
+ if (len <= in_page) {
+ tlb_flush_page(cpu, addr);
+ } else {
+ tlb_flush(cpu);
+ }
if (watchpoint)
*watchpoint = wp;
return size;
}
+static int64_t get_file_align(int fd)
+{
+ int64_t align = -1;
+#if defined(__linux__) && defined(CONFIG_LIBDAXCTL)
+ struct stat st;
+
+ if (fstat(fd, &st) < 0) {
+ return -errno;
+ }
+
+ /* Special handling for devdax character devices */
+ if (S_ISCHR(st.st_mode)) {
+ g_autofree char *path = NULL;
+ g_autofree char *rpath = NULL;
+ struct daxctl_ctx *ctx;
+ struct daxctl_region *region;
+ int rc = 0;
+
+ path = g_strdup_printf("/sys/dev/char/%d:%d",
+ major(st.st_rdev), minor(st.st_rdev));
+ rpath = realpath(path, NULL);
+
+ rc = daxctl_new(&ctx);
+ if (rc) {
+ return -1;
+ }
+
+ daxctl_region_foreach(ctx, region) {
+ if (strstr(rpath, daxctl_region_get_path(region))) {
+ align = daxctl_region_get_align(region);
+ break;
+ }
+ }
+ daxctl_unref(ctx);
+ }
+#endif /* defined(__linux__) && defined(CONFIG_LIBDAXCTL) */
+
+ return align;
+}
+
static int file_ram_open(const char *path,
const char *region_name,
bool *created,
* Otherwise no-op.
* @Note: this is supposed to be a synchronous op.
*/
-void qemu_ram_writeback(RAMBlock *block, ram_addr_t start, ram_addr_t length)
+void qemu_ram_msync(RAMBlock *block, ram_addr_t start, ram_addr_t length)
{
/* The requested range should fit in within the block range */
g_assert((start + length) <= block->used_length);
{
RAMBlock *new_block;
Error *local_err = NULL;
- int64_t file_size;
+ int64_t file_size, file_align;
/* Just support these ram flags by now. */
assert((ram_flags & ~(RAM_SHARED | RAM_PMEM)) == 0);
return NULL;
}
+ file_align = get_file_align(fd);
+ if (file_align > 0 && mr && file_align > mr->align) {
+ error_setg(errp, "backing store align 0x%" PRIx64
+ " is larger than 'align' option 0x%" PRIx64,
+ file_align, mr->align);
+ return NULL;
+ }
+
new_block = g_malloc0(sizeof(*new_block));
new_block->mr = mr;
new_block->used_length = size;
if (!memory_access_is_direct(mr, is_write)) {
if (atomic_xchg(&bounce.in_use, true)) {
+ *plen = 0;
return NULL;
}
/* Avoid unbounded allocations */
#define TRANSLATE(...) address_space_translate(as, __VA_ARGS__)
#define RCU_READ_LOCK(...) rcu_read_lock()
#define RCU_READ_UNLOCK(...) rcu_read_unlock()
-#include "memory_ldst.inc.c"
+#include "memory_ldst.c.inc"
int64_t address_space_cache_init(MemoryRegionCache *cache,
AddressSpace *as,
/* Called from RCU critical section. address_space_read_cached uses this
* out of line function when the target is an MMIO or IOMMU region.
*/
-void
+MemTxResult
address_space_read_cached_slow(MemoryRegionCache *cache, hwaddr addr,
void *buf, hwaddr len)
{
l = len;
mr = address_space_translate_cached(cache, addr, &addr1, &l, false,
MEMTXATTRS_UNSPECIFIED);
- flatview_read_continue(cache->fv,
- addr, MEMTXATTRS_UNSPECIFIED, buf, len,
- addr1, l, mr);
+ return flatview_read_continue(cache->fv,
+ addr, MEMTXATTRS_UNSPECIFIED, buf, len,
+ addr1, l, mr);
}
/* Called from RCU critical section. address_space_write_cached uses this
* out of line function when the target is an MMIO or IOMMU region.
*/
-void
+MemTxResult
address_space_write_cached_slow(MemoryRegionCache *cache, hwaddr addr,
const void *buf, hwaddr len)
{
l = len;
mr = address_space_translate_cached(cache, addr, &addr1, &l, true,
MEMTXATTRS_UNSPECIFIED);
- flatview_write_continue(cache->fv,
- addr, MEMTXATTRS_UNSPECIFIED, buf, len,
- addr1, l, mr);
+ return flatview_write_continue(cache->fv,
+ addr, MEMTXATTRS_UNSPECIFIED, buf, len,
+ addr1, l, mr);
}
#define ARG1_DECL MemoryRegionCache *cache
#define TRANSLATE(...) address_space_translate_cached(cache, __VA_ARGS__)
#define RCU_READ_LOCK() ((void)0)
#define RCU_READ_UNLOCK() ((void)0)
-#include "memory_ldst.inc.c"
+#include "memory_ldst.c.inc"
/* virtual memory access for debug (includes writing to ROM) */
int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
while (len > 0) {
int asidx;
MemTxAttrs attrs;
+ MemTxResult res;
page = addr & TARGET_PAGE_MASK;
phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
l = len;
phys_addr += (addr & ~TARGET_PAGE_MASK);
if (is_write) {
- address_space_write_rom(cpu->cpu_ases[asidx].as, phys_addr,
- attrs, buf, l);
+ res = address_space_write_rom(cpu->cpu_ases[asidx].as, phys_addr,
+ attrs, buf, l);
} else {
- address_space_read(cpu->cpu_ases[asidx].as, phys_addr, attrs, buf,
- l);
+ res = address_space_read(cpu->cpu_ases[asidx].as, phys_addr,
+ attrs, buf, l);
+ }
+ if (res != MEMTX_OK) {
+ return -1;
}
len -= l;
buf += l;
}
}
+/*
+ * If positive, discarding RAM is disabled. If negative, discarding RAM is
+ * required to work and cannot be disabled.
+ */
+static int ram_block_discard_disabled;
+
+int ram_block_discard_disable(bool state)
+{
+ int old;
+
+ if (!state) {
+ atomic_dec(&ram_block_discard_disabled);
+ return 0;
+ }
+
+ do {
+ old = atomic_read(&ram_block_discard_disabled);
+ if (old < 0) {
+ return -EBUSY;
+ }
+ } while (atomic_cmpxchg(&ram_block_discard_disabled, old, old + 1) != old);
+ return 0;
+}
+
+int ram_block_discard_require(bool state)
+{
+ int old;
+
+ if (!state) {
+ atomic_inc(&ram_block_discard_disabled);
+ return 0;
+ }
+
+ do {
+ old = atomic_read(&ram_block_discard_disabled);
+ if (old > 0) {
+ return -EBUSY;
+ }
+ } while (atomic_cmpxchg(&ram_block_discard_disabled, old, old - 1) != old);
+ return 0;
+}
+
+bool ram_block_discard_is_disabled(void)
+{
+ return atomic_read(&ram_block_discard_disabled) > 0;
+}
+
+bool ram_block_discard_is_required(void)
+{
+ return atomic_read(&ram_block_discard_disabled) < 0;
+}
+
#endif
projects / qemu.git / blobdiff