diff options
| -rw-r--r-- | exec.c | 116 | ||||
| -rw-r--r-- | include/exec/ram_addr.h | 138 | ||||
| -rw-r--r-- | memory.c | 15 |
3 files changed, 118 insertions, 151 deletions
@@ -1037,16 +1037,14 @@ void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs) return; } - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); mr = address_space_translate(as, addr, &addr, &l, false, attrs); if (!(memory_region_is_ram(mr) || memory_region_is_romd(mr))) { - rcu_read_unlock(); return; } ram_addr = memory_region_get_ram_addr(mr) + addr; tb_invalidate_phys_page_range(ram_addr, ram_addr + 1); - rcu_read_unlock(); } static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) @@ -1332,14 +1330,13 @@ static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t length) end = TARGET_PAGE_ALIGN(start + length); start &= TARGET_PAGE_MASK; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); block = qemu_get_ram_block(start); assert(block == qemu_get_ram_block(end - 1)); start1 = (uintptr_t)ramblock_ptr(block, start - block->offset); CPU_FOREACH(cpu) { tlb_reset_dirty(cpu, start1, length); } - rcu_read_unlock(); } /* Note: start and end must be within the same ram block. */ @@ -1360,30 +1357,29 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; page = start >> TARGET_PAGE_BITS; - rcu_read_lock(); + WITH_RCU_READ_LOCK_GUARD() { + blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + ramblock = qemu_get_ram_block(start); + /* Range sanity check on the ramblock */ + assert(start >= ramblock->offset && + start + length <= ramblock->offset + ramblock->used_length); - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); - ramblock = qemu_get_ram_block(start); - /* Range sanity check on the ramblock */ - assert(start >= ramblock->offset && - start + length <= ramblock->offset + ramblock->used_length); + while (page < end) { + unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; + unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; + unsigned long num = MIN(end - page, + DIRTY_MEMORY_BLOCK_SIZE - offset); - while (page < end) { - unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; - unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; - unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); + dirty |= bitmap_test_and_clear_atomic(blocks->blocks[idx], + offset, num); + page += num; + } - dirty |= bitmap_test_and_clear_atomic(blocks->blocks[idx], - offset, num); - page += num; + mr_offset = (ram_addr_t)(page << TARGET_PAGE_BITS) - ramblock->offset; + mr_size = (end - page) << TARGET_PAGE_BITS; + memory_region_clear_dirty_bitmap(ramblock->mr, mr_offset, mr_size); } - mr_offset = (ram_addr_t)(page << TARGET_PAGE_BITS) - ramblock->offset; - mr_size = (end - page) << TARGET_PAGE_BITS; - memory_region_clear_dirty_bitmap(ramblock->mr, mr_offset, mr_size); - - rcu_read_unlock(); - if (dirty && tcg_enabled()) { tlb_reset_dirty_range_all(start, length); } @@ -1411,28 +1407,27 @@ DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty end = last >> TARGET_PAGE_BITS; dest = 0; - rcu_read_lock(); + WITH_RCU_READ_LOCK_GUARD() { + blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + while (page < end) { + unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; + unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; + unsigned long num = MIN(end - page, + DIRTY_MEMORY_BLOCK_SIZE - offset); - while (page < end) { - unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; - unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; - unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); - - assert(QEMU_IS_ALIGNED(offset, (1 << BITS_PER_LEVEL))); - assert(QEMU_IS_ALIGNED(num, (1 << BITS_PER_LEVEL))); - offset >>= BITS_PER_LEVEL; + assert(QEMU_IS_ALIGNED(offset, (1 << BITS_PER_LEVEL))); + assert(QEMU_IS_ALIGNED(num, (1 << BITS_PER_LEVEL))); + offset >>= BITS_PER_LEVEL; - bitmap_copy_and_clear_atomic(snap->dirty + dest, - blocks->blocks[idx] + offset, - num); - page += num; - dest += num >> BITS_PER_LEVEL; + bitmap_copy_and_clear_atomic(snap->dirty + dest, + blocks->blocks[idx] + offset, + num); + page += num; + dest += num >> BITS_PER_LEVEL; + } } - rcu_read_unlock(); - if (tcg_enabled()) { tlb_reset_dirty_range_all(start, length); } @@ -1643,7 +1638,7 @@ void ram_block_dump(Monitor *mon) RAMBlock *block; char *psize; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); monitor_printf(mon, "%24s %8s %18s %18s %18s\n", "Block Name", "PSize", "Offset", "Used", "Total"); RAMBLOCK_FOREACH(block) { @@ -1655,7 +1650,6 @@ void ram_block_dump(Monitor *mon) (uint64_t)block->max_length); g_free(psize); } - rcu_read_unlock(); } #ifdef __linux__ @@ -2009,11 +2003,10 @@ static unsigned long last_ram_page(void) RAMBlock *block; ram_addr_t last = 0; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); RAMBLOCK_FOREACH(block) { last = MAX(last, block->offset + block->max_length); } - rcu_read_unlock(); return last >> TARGET_PAGE_BITS; } @@ -2100,7 +2093,7 @@ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) } pstrcat(new_block->idstr, sizeof(new_block->idstr), name); - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); RAMBLOCK_FOREACH(block) { if (block != new_block && !strcmp(block->idstr, new_block->idstr)) { @@ -2109,7 +2102,6 @@ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) abort(); } } - rcu_read_unlock(); } /* Called with iothread lock held. */ @@ -2651,17 +2643,16 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, if (xen_enabled()) { ram_addr_t ram_addr; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); ram_addr = xen_ram_addr_from_mapcache(ptr); block = qemu_get_ram_block(ram_addr); if (block) { *offset = ram_addr - block->offset; } - rcu_read_unlock(); return block; } - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); block = atomic_rcu_read(&ram_list.mru_block); if (block && block->host && host - block->host < block->max_length) { goto found; @@ -2677,7 +2668,6 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, } } - rcu_read_unlock(); return NULL; found: @@ -2685,7 +2675,6 @@ found: if (round_offset) { *offset &= TARGET_PAGE_MASK; } - rcu_read_unlock(); return block; } @@ -3281,10 +3270,9 @@ MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, FlatView *fv; if (len > 0) { - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); fv = address_space_to_flatview(as); result = flatview_read(fv, addr, attrs, buf, len); - rcu_read_unlock(); } return result; @@ -3298,10 +3286,9 @@ MemTxResult address_space_write(AddressSpace *as, hwaddr addr, FlatView *fv; if (len > 0) { - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); fv = address_space_to_flatview(as); result = flatview_write(fv, addr, attrs, buf, len); - rcu_read_unlock(); } return result; @@ -3341,7 +3328,7 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as, hwaddr addr1; MemoryRegion *mr; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); while (len > 0) { l = len; mr = address_space_translate(as, addr, &addr1, &l, true, attrs); @@ -3366,7 +3353,6 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as, buf += l; addr += l; } - rcu_read_unlock(); return MEMTX_OK; } @@ -3511,10 +3497,9 @@ bool address_space_access_valid(AddressSpace *as, hwaddr addr, FlatView *fv; bool result; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); fv = address_space_to_flatview(as); result = flatview_access_valid(fv, addr, len, is_write, attrs); - rcu_read_unlock(); return result; } @@ -3569,13 +3554,12 @@ void *address_space_map(AddressSpace *as, } l = len; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); fv = address_space_to_flatview(as); mr = flatview_translate(fv, addr, &xlat, &l, is_write, attrs); if (!memory_access_is_direct(mr, is_write)) { if (atomic_xchg(&bounce.in_use, true)) { - rcu_read_unlock(); return NULL; } /* Avoid unbounded allocations */ @@ -3591,7 +3575,6 @@ void *address_space_map(AddressSpace *as, bounce.buffer, l); } - rcu_read_unlock(); *plen = l; return bounce.buffer; } @@ -3601,7 +3584,6 @@ void *address_space_map(AddressSpace *as, *plen = flatview_extend_translation(fv, addr, len, mr, xlat, l, is_write, attrs); ptr = qemu_ram_ptr_length(mr->ram_block, xlat, plen, true); - rcu_read_unlock(); return ptr; } @@ -3869,13 +3851,12 @@ bool cpu_physical_memory_is_io(hwaddr phys_addr) hwaddr l = 1; bool res; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); mr = address_space_translate(&address_space_memory, phys_addr, &phys_addr, &l, false, MEMTXATTRS_UNSPECIFIED); res = !(memory_region_is_ram(mr) || memory_region_is_romd(mr)); - rcu_read_unlock(); return res; } @@ -3884,14 +3865,13 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque) RAMBlock *block; int ret = 0; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); RAMBLOCK_FOREACH(block) { ret = func(block, opaque); if (ret) { break; } } - rcu_read_unlock(); return ret; } diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index e96e621de5..ad158bb247 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -193,30 +193,29 @@ static inline bool cpu_physical_memory_get_dirty(ram_addr_t start, end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; page = start >> TARGET_PAGE_BITS; - rcu_read_lock(); - - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + WITH_RCU_READ_LOCK_GUARD() { + blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + + idx = page / DIRTY_MEMORY_BLOCK_SIZE; + offset = page % DIRTY_MEMORY_BLOCK_SIZE; + base = page - offset; + while (page < end) { + unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE); + unsigned long num = next - base; + unsigned long found = find_next_bit(blocks->blocks[idx], + num, offset); + if (found < num) { + dirty = true; + break; + } - idx = page / DIRTY_MEMORY_BLOCK_SIZE; - offset = page % DIRTY_MEMORY_BLOCK_SIZE; - base = page - offset; - while (page < end) { - unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE); - unsigned long num = next - base; - unsigned long found = find_next_bit(blocks->blocks[idx], num, offset); - if (found < num) { - dirty = true; - break; + page = next; + idx++; + offset = 0; + base += DIRTY_MEMORY_BLOCK_SIZE; } - - page = next; - idx++; - offset = 0; - base += DIRTY_MEMORY_BLOCK_SIZE; } - rcu_read_unlock(); - return dirty; } @@ -234,7 +233,7 @@ static inline bool cpu_physical_memory_all_dirty(ram_addr_t start, end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; page = start >> TARGET_PAGE_BITS; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); @@ -256,8 +255,6 @@ static inline bool cpu_physical_memory_all_dirty(ram_addr_t start, base += DIRTY_MEMORY_BLOCK_SIZE; } - rcu_read_unlock(); - return dirty; } @@ -309,13 +306,11 @@ static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, idx = page / DIRTY_MEMORY_BLOCK_SIZE; offset = page % DIRTY_MEMORY_BLOCK_SIZE; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); set_bit_atomic(offset, blocks->blocks[idx]); - - rcu_read_unlock(); } static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, @@ -334,39 +329,37 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; page = start >> TARGET_PAGE_BITS; - rcu_read_lock(); + WITH_RCU_READ_LOCK_GUARD() { + for (i = 0; i < DIRTY_MEMORY_NUM; i++) { + blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]); + } - for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]); - } + idx = page / DIRTY_MEMORY_BLOCK_SIZE; + offset = page % DIRTY_MEMORY_BLOCK_SIZE; + base = page - offset; + while (page < end) { + unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE); - idx = page / DIRTY_MEMORY_BLOCK_SIZE; - offset = page % DIRTY_MEMORY_BLOCK_SIZE; - base = page - offset; - while (page < end) { - unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE); + if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) { + bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx], + offset, next - page); + } + if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) { + bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx], + offset, next - page); + } + if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) { + bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx], + offset, next - page); + } - if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) { - bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx], - offset, next - page); + page = next; + idx++; + offset = 0; + base += DIRTY_MEMORY_BLOCK_SIZE; } - if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) { - bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx], - offset, next - page); - } - if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) { - bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx], - offset, next - page); - } - - page = next; - idx++; - offset = 0; - base += DIRTY_MEMORY_BLOCK_SIZE; } - rcu_read_unlock(); - xen_hvm_modified_memory(start, length); } @@ -396,36 +389,35 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, offset = BIT_WORD((start >> TARGET_PAGE_BITS) % DIRTY_MEMORY_BLOCK_SIZE); - rcu_read_lock(); + WITH_RCU_READ_LOCK_GUARD() { + for (i = 0; i < DIRTY_MEMORY_NUM; i++) { + blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks; + } - for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks; - } + for (k = 0; k < nr; k++) { + if (bitmap[k]) { + unsigned long temp = leul_to_cpu(bitmap[k]); - for (k = 0; k < nr; k++) { - if (bitmap[k]) { - unsigned long temp = leul_to_cpu(bitmap[k]); + atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); - atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); + if (global_dirty_log) { + atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], + temp); + } - if (global_dirty_log) { - atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], - temp); + if (tcg_enabled()) { + atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], + temp); + } } - if (tcg_enabled()) { - atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], temp); + if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { + offset = 0; + idx++; } } - - if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { - offset = 0; - idx++; - } } - rcu_read_unlock(); - xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS); } else { uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE; @@ -779,14 +779,13 @@ FlatView *address_space_get_flatview(AddressSpace *as) { FlatView *view; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); do { view = address_space_to_flatview(as); /* If somebody has replaced as->current_map concurrently, * flatview_ref returns false. */ } while (!flatview_ref(view)); - rcu_read_unlock(); return view; } @@ -2166,12 +2165,11 @@ int memory_region_get_fd(MemoryRegion *mr) { int fd; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); while (mr->alias) { mr = mr->alias; } fd = mr->ram_block->fd; - rcu_read_unlock(); return fd; } @@ -2181,14 +2179,13 @@ void *memory_region_get_ram_ptr(MemoryRegion *mr) void *ptr; uint64_t offset = 0; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); while (mr->alias) { offset += mr->alias_offset; mr = mr->alias; } assert(mr->ram_block); ptr = qemu_map_ram_ptr(mr->ram_block, offset); - rcu_read_unlock(); return ptr; } @@ -2578,12 +2575,11 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr, hwaddr addr, uint64_t size) { MemoryRegionSection ret; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); ret = memory_region_find_rcu(mr, addr, size); if (ret.mr) { memory_region_ref(ret.mr); } - rcu_read_unlock(); return ret; } @@ -2591,9 +2587,8 @@ bool memory_region_present(MemoryRegion *container, hwaddr addr) { MemoryRegion *mr; - rcu_read_lock(); + RCU_READ_LOCK_GUARD(); mr = memory_region_find_rcu(container, addr, 1).mr; - rcu_read_unlock(); return mr && mr != container; } |