diff options
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/cpu-common.h | 4 | ||||
| -rw-r--r-- | include/exec/memory.h | 36 | ||||
| -rw-r--r-- | include/exec/ram_addr.h | 3 |
3 files changed, 35 insertions, 8 deletions
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index a2c3b92742..aaee995634 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -57,10 +57,10 @@ typedef uint32_t CPUReadMemoryFunc(void *opaque, hwaddr addr); void qemu_ram_remap(ram_addr_t addr, ram_addr_t length); /* This should not be used by devices. */ -MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr); +ram_addr_t qemu_ram_addr_from_host(void *ptr); RAMBlock *qemu_ram_block_by_name(const char *name); RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, - ram_addr_t *ram_addr, ram_addr_t *offset); + ram_addr_t *offset); void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); diff --git a/include/exec/memory.h b/include/exec/memory.h index f649697ee9..4ab680052f 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -32,6 +32,8 @@ #include "qom/object.h" #include "qemu/rcu.h" +#define RAM_ADDR_INVALID (~(ram_addr_t)0) + #define MAX_PHYS_ADDR_SPACE_BITS 62 #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) @@ -667,6 +669,35 @@ static inline bool memory_region_is_rom(MemoryRegion *mr) int memory_region_get_fd(MemoryRegion *mr); /** + * memory_region_set_fd: Mark a RAM memory region as backed by a + * file descriptor. + * + * This function is typically used after memory_region_init_ram_ptr(). + * + * @mr: the memory region being queried. + * @fd: the file descriptor that backs @mr. + */ +void memory_region_set_fd(MemoryRegion *mr, int fd); + +/** + * memory_region_from_host: Convert a pointer into a RAM memory region + * and an offset within it. + * + * Given a host pointer inside a RAM memory region (created with + * memory_region_init_ram() or memory_region_init_ram_ptr()), return + * the MemoryRegion and the offset within it. + * + * Use with care; by the time this function returns, the returned pointer is + * not protected by RCU anymore. If the caller is not within an RCU critical + * section and does not hold the iothread lock, it must have other means of + * protecting the pointer, such as a reference to the region that includes + * the incoming ram_addr_t. + * + * @mr: the memory region being queried. + */ +MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset); + +/** * memory_region_get_ram_ptr: Get a pointer into a RAM memory region. * * Returns a host pointer to a RAM memory region (created with @@ -1362,7 +1393,7 @@ MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, MemoryRegion *mr); MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, uint8_t *buf, int len); -void *qemu_get_ram_ptr(RAMBlock *ram_block, ram_addr_t addr); +void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr); static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) { @@ -1400,8 +1431,7 @@ MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, l = len; mr = address_space_translate(as, addr, &addr1, &l, false); if (len == l && memory_access_is_direct(mr, false)) { - addr1 += memory_region_get_ram_addr(mr); - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); + ptr = qemu_map_ram_ptr(mr->ram_block, addr1); memcpy(buf, ptr, len); } else { result = address_space_read_continue(as, addr, attrs, buf, len, diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index 5b6e1b8b86..2a9465da11 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -105,9 +105,6 @@ RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size, uint64_t length, void *host), MemoryRegion *mr, Error **errp); -int qemu_get_ram_fd(ram_addr_t addr); -void qemu_set_ram_fd(ram_addr_t addr, int fd); -void *qemu_get_ram_block_host_ptr(ram_addr_t addr); void qemu_ram_free(RAMBlock *block); int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp); |