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Wed, 13 Nov 2024 17:16:01 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: Paolo Bonzini , Richard Henderson , Anton Johansson , qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, Thomas Huth , qemu-arm@nongnu.org, Peter Xu , Pierrick Bouvier , qemu-riscv@nongnu.org, David Hildenbrand , Peter Maydell , =?utf-8?q?Alex_Benn=C3=A9e?= , qemu-s390x@nongnu.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH 21/24] exec: Extract CPU physical memory API to 'sysemu/physmem-target.h' Date: Thu, 14 Nov 2024 02:13:06 +0100 Message-ID: <20241114011310.3615-22-philmd@linaro.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241114011310.3615-1-philmd@linaro.org> References: <20241114011310.3615-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::42f; envelope-from=philmd@linaro.org; helo=mail-wr1-x42f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org In order to keep "exec/ram_addr.h" focused on (target agnostic) methods related to the ram_addr_t type, move all (target specific) CPU physical memory API to a new "sysemu/physmem-target.h" header. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Pierrick Bouvier --- MAINTAINERS | 1 + include/exec/ram_addr.h | 483 +--------------------------- include/sysemu/physmem-target.h | 506 ++++++++++++++++++++++++++++++ accel/kvm/kvm-all.c | 1 + accel/tcg/cputlb.c | 1 + accel/tcg/translate-all.c | 1 + hw/ppc/spapr.c | 1 + hw/ppc/spapr_caps.c | 1 + hw/ppc/spapr_pci.c | 1 + hw/remote/memory.c | 1 + hw/remote/proxy-memory-listener.c | 1 + hw/s390x/s390-stattrib-kvm.c | 1 + hw/s390x/s390-stattrib.c | 1 + hw/s390x/s390-virtio-ccw.c | 1 + hw/vfio/common.c | 1 + hw/vfio/container.c | 1 + hw/vfio/iommufd.c | 1 + hw/vfio/migration.c | 1 + hw/vfio/spapr.c | 1 + hw/virtio/virtio-mem.c | 1 + migration/ram.c | 1 + plugins/api.c | 1 + system/memory.c | 1 + system/physmem.c | 1 + target/arm/tcg/mte_helper.c | 1 + target/ppc/kvm.c | 1 + target/s390x/kvm/kvm.c | 1 + 27 files changed, 532 insertions(+), 482 deletions(-) create mode 100644 include/sysemu/physmem-target.h diff --git a/MAINTAINERS b/MAINTAINERS index 095420f8b0..0027e56fa5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3027,6 +3027,7 @@ F: include/exec/memory.h F: include/exec/ram_addr.h F: include/exec/ramblock.h F: include/sysemu/memory_mapping.h +F: include/sysemu/physmem-target.h F: system/dma-helpers.c F: system/ioport.c F: system/memory.c diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index b6d5551549..80f6dc7564 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -20,82 +20,6 @@ #define RAM_ADDR_H #ifndef CONFIG_USER_ONLY -#include "cpu.h" -#include "sysemu/xen.h" -#include "sysemu/tcg.h" -#include "exec/cputlb.h" -#include "exec/ramlist.h" -#include "exec/ramblock.h" -#include "exec/exec-all.h" -#include "qemu/rcu.h" - -extern uint64_t total_dirty_pages; - -/** - * clear_bmap_size: calculate clear bitmap size - * - * @pages: number of guest pages - * @shift: guest page number shift - * - * Returns: number of bits for the clear bitmap - */ -static inline long clear_bmap_size(uint64_t pages, uint8_t shift) -{ - return DIV_ROUND_UP(pages, 1UL << shift); -} - -/** - * clear_bmap_set: set clear bitmap for the page range. Must be with - * bitmap_mutex held. - * - * @rb: the ramblock to operate on - * @start: the start page number - * @size: number of pages to set in the bitmap - * - * Returns: None - */ -static inline void clear_bmap_set(RAMBlock *rb, uint64_t start, - uint64_t npages) -{ - uint8_t shift = rb->clear_bmap_shift; - - bitmap_set(rb->clear_bmap, start >> shift, clear_bmap_size(npages, shift)); -} - -/** - * clear_bmap_test_and_clear: test clear bitmap for the page, clear if set. - * Must be with bitmap_mutex held. - * - * @rb: the ramblock to operate on - * @page: the page number to check - * - * Returns: true if the bit was set, false otherwise - */ -static inline bool clear_bmap_test_and_clear(RAMBlock *rb, uint64_t page) -{ - uint8_t shift = rb->clear_bmap_shift; - - return bitmap_test_and_clear(rb->clear_bmap, page >> shift, 1); -} - -static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset) -{ - return (b && b->host && offset < b->used_length) ? true : false; -} - -static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset) -{ - assert(offset_in_ramblock(block, offset)); - return (char *)block->host + offset; -} - -static inline unsigned long int ramblock_recv_bitmap_offset(void *host_addr, - RAMBlock *rb) -{ - uint64_t host_addr_offset = - (uint64_t)(uintptr_t)(host_addr - (void *)rb->host); - return host_addr_offset >> TARGET_PAGE_BITS; -} bool ramblock_is_pmem(RAMBlock *rb); @@ -143,411 +67,6 @@ int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp); void qemu_ram_msync(RAMBlock *block, ram_addr_t start, ram_addr_t length); -/* Clear whole block of mem */ -static inline void qemu_ram_block_writeback(RAMBlock *block) -{ - qemu_ram_msync(block, 0, block->used_length); -} +#endif /* CONFIG_USER_ONLY */ -#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1) -#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE)) - -static inline bool cpu_physical_memory_get_dirty(ram_addr_t start, - ram_addr_t length, - unsigned client) -{ - DirtyMemoryBlocks *blocks; - unsigned long end, page; - unsigned long idx, offset, base; - bool dirty = false; - - assert(client < DIRTY_MEMORY_NUM); - - end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; - page = start >> TARGET_PAGE_BITS; - - WITH_RCU_READ_LOCK_GUARD() { - blocks = qatomic_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; - } - - page = next; - idx++; - offset = 0; - base += DIRTY_MEMORY_BLOCK_SIZE; - } - } - - return dirty; -} - -static inline bool cpu_physical_memory_all_dirty(ram_addr_t start, - ram_addr_t length, - unsigned client) -{ - DirtyMemoryBlocks *blocks; - unsigned long end, page; - unsigned long idx, offset, base; - bool dirty = true; - - assert(client < DIRTY_MEMORY_NUM); - - end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; - page = start >> TARGET_PAGE_BITS; - - RCU_READ_LOCK_GUARD(); - - blocks = qatomic_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_zero_bit(blocks->blocks[idx], num, offset); - if (found < num) { - dirty = false; - break; - } - - page = next; - idx++; - offset = 0; - base += DIRTY_MEMORY_BLOCK_SIZE; - } - - return dirty; -} - -static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr, - unsigned client) -{ - return cpu_physical_memory_get_dirty(addr, 1, client); -} - -static inline bool cpu_physical_memory_is_clean(ram_addr_t addr) -{ - bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA); - bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE); - bool migration = - cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION); - return !(vga && code && migration); -} - -static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start, - ram_addr_t length, - uint8_t mask) -{ - uint8_t ret = 0; - - if (mask & (1 << DIRTY_MEMORY_VGA) && - !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) { - ret |= (1 << DIRTY_MEMORY_VGA); - } - if (mask & (1 << DIRTY_MEMORY_CODE) && - !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) { - ret |= (1 << DIRTY_MEMORY_CODE); - } - if (mask & (1 << DIRTY_MEMORY_MIGRATION) && - !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) { - ret |= (1 << DIRTY_MEMORY_MIGRATION); - } - return ret; -} - -static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, - unsigned client) -{ - unsigned long page, idx, offset; - DirtyMemoryBlocks *blocks; - - assert(client < DIRTY_MEMORY_NUM); - - page = addr >> TARGET_PAGE_BITS; - idx = page / DIRTY_MEMORY_BLOCK_SIZE; - offset = page % DIRTY_MEMORY_BLOCK_SIZE; - - RCU_READ_LOCK_GUARD(); - - blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); - - set_bit_atomic(offset, blocks->blocks[idx]); -} - -static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, - ram_addr_t length, - uint8_t mask) -{ - DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM]; - unsigned long end, page; - unsigned long idx, offset, base; - int i; - - if (!mask && !xen_enabled()) { - return; - } - - end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; - page = start >> TARGET_PAGE_BITS; - - WITH_RCU_READ_LOCK_GUARD() { - for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = qatomic_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); - - 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); - } - - page = next; - idx++; - offset = 0; - base += DIRTY_MEMORY_BLOCK_SIZE; - } - } - - xen_hvm_modified_memory(start, length); -} - -#if !defined(_WIN32) - -/* - * Contrary to cpu_physical_memory_sync_dirty_bitmap() this function returns - * the number of dirty pages in @bitmap passed as argument. On the other hand, - * cpu_physical_memory_sync_dirty_bitmap() returns newly dirtied pages that - * weren't set in the global migration bitmap. - */ -static inline -uint64_t cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, - ram_addr_t start, - ram_addr_t pages) -{ - unsigned long i, j; - unsigned long page_number, c, nbits; - hwaddr addr; - ram_addr_t ram_addr; - uint64_t num_dirty = 0; - unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS; - unsigned long hpratio = qemu_real_host_page_size() / TARGET_PAGE_SIZE; - unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); - - /* start address is aligned at the start of a word? */ - if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) && - (hpratio == 1)) { - unsigned long **blocks[DIRTY_MEMORY_NUM]; - unsigned long idx; - unsigned long offset; - long k; - long nr = BITS_TO_LONGS(pages); - - idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE; - offset = BIT_WORD((start >> TARGET_PAGE_BITS) % - DIRTY_MEMORY_BLOCK_SIZE); - - WITH_RCU_READ_LOCK_GUARD() { - for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = - qatomic_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]); - - nbits = ctpopl(temp); - qatomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); - - if (global_dirty_tracking) { - qatomic_or( - &blocks[DIRTY_MEMORY_MIGRATION][idx][offset], - temp); - if (unlikely( - global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) { - total_dirty_pages += nbits; - } - } - - num_dirty += nbits; - - if (tcg_enabled()) { - qatomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], - temp); - } - } - - if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { - offset = 0; - idx++; - } - } - } - - xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS); - } else { - uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE; - - if (!global_dirty_tracking) { - clients &= ~(1 << DIRTY_MEMORY_MIGRATION); - } - - /* - * bitmap-traveling is faster than memory-traveling (for addr...) - * especially when most of the memory is not dirty. - */ - for (i = 0; i < len; i++) { - if (bitmap[i] != 0) { - c = leul_to_cpu(bitmap[i]); - nbits = ctpopl(c); - if (unlikely(global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) { - total_dirty_pages += nbits; - } - num_dirty += nbits; - do { - j = ctzl(c); - c &= ~(1ul << j); - page_number = (i * HOST_LONG_BITS + j) * hpratio; - addr = page_number * TARGET_PAGE_SIZE; - ram_addr = start + addr; - cpu_physical_memory_set_dirty_range(ram_addr, - TARGET_PAGE_SIZE * hpratio, clients); - } while (c != 0); - } - } - } - - return num_dirty; -} -#endif /* not _WIN32 */ - -static inline void cpu_physical_memory_dirty_bits_cleared(ram_addr_t start, - ram_addr_t length) -{ - if (tcg_enabled()) { - tlb_reset_dirty_range_all(start, length); - } - -} -bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, - ram_addr_t length, - unsigned client); - -DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty - (MemoryRegion *mr, hwaddr offset, hwaddr length, unsigned client); - -bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap, - ram_addr_t start, - ram_addr_t length); - -static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, - ram_addr_t length) -{ - cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION); - cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA); - cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE); -} - - -/* Called with RCU critical section */ -static inline -uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb, - ram_addr_t start, - ram_addr_t length) -{ - ram_addr_t addr; - unsigned long word = BIT_WORD((start + rb->offset) >> TARGET_PAGE_BITS); - uint64_t num_dirty = 0; - unsigned long *dest = rb->bmap; - - /* start address and length is aligned at the start of a word? */ - if (((word * BITS_PER_LONG) << TARGET_PAGE_BITS) == - (start + rb->offset) && - !(length & ((BITS_PER_LONG << TARGET_PAGE_BITS) - 1))) { - int k; - int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS); - unsigned long * const *src; - unsigned long idx = (word * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE; - unsigned long offset = BIT_WORD((word * BITS_PER_LONG) % - DIRTY_MEMORY_BLOCK_SIZE); - unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); - - src = qatomic_rcu_read( - &ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks; - - for (k = page; k < page + nr; k++) { - if (src[idx][offset]) { - unsigned long bits = qatomic_xchg(&src[idx][offset], 0); - unsigned long new_dirty; - new_dirty = ~dest[k]; - dest[k] |= bits; - new_dirty &= bits; - num_dirty += ctpopl(new_dirty); - } - - if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { - offset = 0; - idx++; - } - } - if (num_dirty) { - cpu_physical_memory_dirty_bits_cleared(start, length); - } - - if (rb->clear_bmap) { - /* - * Postpone the dirty bitmap clear to the point before we - * really send the pages, also we will split the clear - * dirty procedure into smaller chunks. - */ - clear_bmap_set(rb, start >> TARGET_PAGE_BITS, - length >> TARGET_PAGE_BITS); - } else { - /* Slow path - still do that in a huge chunk */ - memory_region_clear_dirty_bitmap(rb->mr, start, length); - } - } else { - ram_addr_t offset = rb->offset; - - for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { - if (cpu_physical_memory_test_and_clear_dirty( - start + addr + offset, - TARGET_PAGE_SIZE, - DIRTY_MEMORY_MIGRATION)) { - long k = (start + addr) >> TARGET_PAGE_BITS; - if (!test_and_set_bit(k, dest)) { - num_dirty++; - } - } - } - } - - return num_dirty; -} -#endif #endif diff --git a/include/sysemu/physmem-target.h b/include/sysemu/physmem-target.h new file mode 100644 index 0000000000..b30c42da60 --- /dev/null +++ b/include/sysemu/physmem-target.h @@ -0,0 +1,506 @@ +/* + * Declarations for cpu physical memory functions + * + * Copyright 2011 Red Hat, Inc. and/or its affiliates + * + * Authors: + * Avi Kivity + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + * + */ + +/* + * This header is for use by exec.c and memory.c ONLY. Do not include it. + * The functions declared here will be removed soon. + */ + +#ifndef RAM_ADDR_TARGET_H +#define RAM_ADDR_TARGET_H + +#include "cpu.h" +#include "sysemu/xen.h" +#include "sysemu/tcg.h" +#include "exec/cputlb.h" +#include "exec/ram_addr.h" +#include "exec/ramlist.h" +#include "exec/ramblock.h" +#include "qemu/rcu.h" + +extern uint64_t total_dirty_pages; + +/** + * clear_bmap_size: calculate clear bitmap size + * + * @pages: number of guest pages + * @shift: guest page number shift + * + * Returns: number of bits for the clear bitmap + */ +static inline long clear_bmap_size(uint64_t pages, uint8_t shift) +{ + return DIV_ROUND_UP(pages, 1UL << shift); +} + +/** + * clear_bmap_set: set clear bitmap for the page range. Must be with + * bitmap_mutex held. + * + * @rb: the ramblock to operate on + * @start: the start page number + * @size: number of pages to set in the bitmap + * + * Returns: None + */ +static inline void clear_bmap_set(RAMBlock *rb, uint64_t start, + uint64_t npages) +{ + uint8_t shift = rb->clear_bmap_shift; + + bitmap_set(rb->clear_bmap, start >> shift, clear_bmap_size(npages, shift)); +} + +/** + * clear_bmap_test_and_clear: test clear bitmap for the page, clear if set. + * Must be with bitmap_mutex held. + * + * @rb: the ramblock to operate on + * @page: the page number to check + * + * Returns: true if the bit was set, false otherwise + */ +static inline bool clear_bmap_test_and_clear(RAMBlock *rb, uint64_t page) +{ + uint8_t shift = rb->clear_bmap_shift; + + return bitmap_test_and_clear(rb->clear_bmap, page >> shift, 1); +} + +static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset) +{ + return (b && b->host && offset < b->used_length) ? true : false; +} + +static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset) +{ + assert(offset_in_ramblock(block, offset)); + return (char *)block->host + offset; +} + +static inline unsigned long int ramblock_recv_bitmap_offset(void *host_addr, + RAMBlock *rb) +{ + uint64_t host_addr_offset = + (uint64_t)(uintptr_t)(host_addr - (void *)rb->host); + return host_addr_offset >> TARGET_PAGE_BITS; +} + +/* Clear whole block of mem */ +static inline void qemu_ram_block_writeback(RAMBlock *block) +{ + qemu_ram_msync(block, 0, block->used_length); +} + +#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1) +#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE)) + +static inline bool cpu_physical_memory_get_dirty(ram_addr_t start, + ram_addr_t length, + unsigned client) +{ + DirtyMemoryBlocks *blocks; + unsigned long end, page; + unsigned long idx, offset, base; + bool dirty = false; + + assert(client < DIRTY_MEMORY_NUM); + + end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; + page = start >> TARGET_PAGE_BITS; + + WITH_RCU_READ_LOCK_GUARD() { + blocks = qatomic_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; + } + + page = next; + idx++; + offset = 0; + base += DIRTY_MEMORY_BLOCK_SIZE; + } + } + + return dirty; +} + +static inline bool cpu_physical_memory_all_dirty(ram_addr_t start, + ram_addr_t length, + unsigned client) +{ + DirtyMemoryBlocks *blocks; + unsigned long end, page; + unsigned long idx, offset, base; + bool dirty = true; + + assert(client < DIRTY_MEMORY_NUM); + + end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; + page = start >> TARGET_PAGE_BITS; + + RCU_READ_LOCK_GUARD(); + + blocks = qatomic_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_zero_bit(blocks->blocks[idx], num, offset); + if (found < num) { + dirty = false; + break; + } + + page = next; + idx++; + offset = 0; + base += DIRTY_MEMORY_BLOCK_SIZE; + } + + return dirty; +} + +static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr, + unsigned client) +{ + return cpu_physical_memory_get_dirty(addr, 1, client); +} + +static inline bool cpu_physical_memory_is_clean(ram_addr_t addr) +{ + bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA); + bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE); + bool migration = + cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION); + return !(vga && code && migration); +} + +static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start, + ram_addr_t length, + uint8_t mask) +{ + uint8_t ret = 0; + + if (mask & (1 << DIRTY_MEMORY_VGA) && + !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) { + ret |= (1 << DIRTY_MEMORY_VGA); + } + if (mask & (1 << DIRTY_MEMORY_CODE) && + !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) { + ret |= (1 << DIRTY_MEMORY_CODE); + } + if (mask & (1 << DIRTY_MEMORY_MIGRATION) && + !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) { + ret |= (1 << DIRTY_MEMORY_MIGRATION); + } + return ret; +} + +static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, + unsigned client) +{ + unsigned long page, idx, offset; + DirtyMemoryBlocks *blocks; + + assert(client < DIRTY_MEMORY_NUM); + + page = addr >> TARGET_PAGE_BITS; + idx = page / DIRTY_MEMORY_BLOCK_SIZE; + offset = page % DIRTY_MEMORY_BLOCK_SIZE; + + RCU_READ_LOCK_GUARD(); + + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); + + set_bit_atomic(offset, blocks->blocks[idx]); +} + +static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, + ram_addr_t length, + uint8_t mask) +{ + DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM]; + unsigned long end, page; + unsigned long idx, offset, base; + int i; + + if (!mask && !xen_enabled()) { + return; + } + + end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; + page = start >> TARGET_PAGE_BITS; + + WITH_RCU_READ_LOCK_GUARD() { + for (i = 0; i < DIRTY_MEMORY_NUM; i++) { + blocks[i] = qatomic_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); + + 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); + } + + page = next; + idx++; + offset = 0; + base += DIRTY_MEMORY_BLOCK_SIZE; + } + } + + xen_hvm_modified_memory(start, length); +} + +#if !defined(_WIN32) + +/* + * Contrary to cpu_physical_memory_sync_dirty_bitmap() this function returns + * the number of dirty pages in @bitmap passed as argument. On the other hand, + * cpu_physical_memory_sync_dirty_bitmap() returns newly dirtied pages that + * weren't set in the global migration bitmap. + */ +static inline +uint64_t cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, + ram_addr_t start, + ram_addr_t pages) +{ + unsigned long i, j; + unsigned long page_number, c, nbits; + hwaddr addr; + ram_addr_t ram_addr; + uint64_t num_dirty = 0; + unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS; + unsigned long hpratio = qemu_real_host_page_size() / TARGET_PAGE_SIZE; + unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); + + /* start address is aligned at the start of a word? */ + if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) && + (hpratio == 1)) { + unsigned long **blocks[DIRTY_MEMORY_NUM]; + unsigned long idx; + unsigned long offset; + long k; + long nr = BITS_TO_LONGS(pages); + + idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE; + offset = BIT_WORD((start >> TARGET_PAGE_BITS) % + DIRTY_MEMORY_BLOCK_SIZE); + + WITH_RCU_READ_LOCK_GUARD() { + for (i = 0; i < DIRTY_MEMORY_NUM; i++) { + blocks[i] = + qatomic_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]); + + nbits = ctpopl(temp); + qatomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); + + if (global_dirty_tracking) { + qatomic_or( + &blocks[DIRTY_MEMORY_MIGRATION][idx][offset], + temp); + if (unlikely( + global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) { + total_dirty_pages += nbits; + } + } + + num_dirty += nbits; + + if (tcg_enabled()) { + qatomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], + temp); + } + } + + if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { + offset = 0; + idx++; + } + } + } + + xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS); + } else { + uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE; + + if (!global_dirty_tracking) { + clients &= ~(1 << DIRTY_MEMORY_MIGRATION); + } + + /* + * bitmap-traveling is faster than memory-traveling (for addr...) + * especially when most of the memory is not dirty. + */ + for (i = 0; i < len; i++) { + if (bitmap[i] != 0) { + c = leul_to_cpu(bitmap[i]); + nbits = ctpopl(c); + if (unlikely(global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) { + total_dirty_pages += nbits; + } + num_dirty += nbits; + do { + j = ctzl(c); + c &= ~(1ul << j); + page_number = (i * HOST_LONG_BITS + j) * hpratio; + addr = page_number * TARGET_PAGE_SIZE; + ram_addr = start + addr; + cpu_physical_memory_set_dirty_range(ram_addr, + TARGET_PAGE_SIZE * hpratio, clients); + } while (c != 0); + } + } + } + + return num_dirty; +} +#endif /* not _WIN32 */ + +static inline void cpu_physical_memory_dirty_bits_cleared(ram_addr_t start, + ram_addr_t length) +{ + if (tcg_enabled()) { + tlb_reset_dirty_range_all(start, length); + } + +} +bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, + ram_addr_t length, + unsigned client); + +DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty + (MemoryRegion *mr, hwaddr offset, hwaddr length, unsigned client); + +bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap, + ram_addr_t start, + ram_addr_t length); + +static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, + ram_addr_t length) +{ + cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION); + cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA); + cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE); +} + + +/* Called with RCU critical section */ +static inline +uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb, + ram_addr_t start, + ram_addr_t length) +{ + ram_addr_t addr; + unsigned long word = BIT_WORD((start + rb->offset) >> TARGET_PAGE_BITS); + uint64_t num_dirty = 0; + unsigned long *dest = rb->bmap; + + /* start address and length is aligned at the start of a word? */ + if (((word * BITS_PER_LONG) << TARGET_PAGE_BITS) == + (start + rb->offset) && + !(length & ((BITS_PER_LONG << TARGET_PAGE_BITS) - 1))) { + int k; + int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS); + unsigned long * const *src; + unsigned long idx = (word * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE; + unsigned long offset = BIT_WORD((word * BITS_PER_LONG) % + DIRTY_MEMORY_BLOCK_SIZE); + unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); + + src = qatomic_rcu_read( + &ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks; + + for (k = page; k < page + nr; k++) { + if (src[idx][offset]) { + unsigned long bits = qatomic_xchg(&src[idx][offset], 0); + unsigned long new_dirty; + new_dirty = ~dest[k]; + dest[k] |= bits; + new_dirty &= bits; + num_dirty += ctpopl(new_dirty); + } + + if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) { + offset = 0; + idx++; + } + } + if (num_dirty) { + cpu_physical_memory_dirty_bits_cleared(start, length); + } + + if (rb->clear_bmap) { + /* + * Postpone the dirty bitmap clear to the point before we + * really send the pages, also we will split the clear + * dirty procedure into smaller chunks. + */ + clear_bmap_set(rb, start >> TARGET_PAGE_BITS, + length >> TARGET_PAGE_BITS); + } else { + /* Slow path - still do that in a huge chunk */ + memory_region_clear_dirty_bitmap(rb->mr, start, length); + } + } else { + ram_addr_t offset = rb->offset; + + for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { + if (cpu_physical_memory_test_and_clear_dirty( + start + addr + offset, + TARGET_PAGE_SIZE, + DIRTY_MEMORY_MIGRATION)) { + long k = (start + addr) >> TARGET_PAGE_BITS; + if (!test_and_set_bit(k, dest)) { + num_dirty++; + } + } + } + } + + return num_dirty; +} + +#endif diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 801cff16a5..a80547006b 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -35,6 +35,7 @@ #include "qemu/bswap.h" #include "exec/memory.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qemu/event_notifier.h" #include "qemu/main-loop.h" #include "trace.h" diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index dba4831cd1..d4b381641c 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -28,6 +28,7 @@ #include "exec/tb-flush.h" #include "exec/memory-internal.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "exec/mmu-access-type.h" #include "exec/tlb-common.h" #include "exec/vaddr.h" diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index fdf6d8ac19..48015be829 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -41,6 +41,7 @@ #endif #else #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #endif #include "exec/cputlb.h" diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5c02037c56..a9833530c7 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -75,6 +75,7 @@ #include "hw/virtio/vhost-scsi-common.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "exec/confidential-guest-support.h" #include "hw/usb.h" #include "qemu/config-file.h" diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c index 2f74923560..5eef7475c1 100644 --- a/hw/ppc/spapr_caps.c +++ b/hw/ppc/spapr_caps.c @@ -28,6 +28,7 @@ #include "qapi/visitor.h" #include "sysemu/hw_accel.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "target/ppc/cpu.h" #include "target/ppc/mmu-hash64.h" #include "cpu-models.h" diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 7e24084673..a91fea1304 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -35,6 +35,7 @@ #include "hw/ppc/spapr.h" #include "hw/pci-host/spapr.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include #include "trace.h" #include "qemu/error-report.h" diff --git a/hw/remote/memory.c b/hw/remote/memory.c index 6d60da91e0..0af2a2f3fe 100644 --- a/hw/remote/memory.c +++ b/hw/remote/memory.c @@ -12,6 +12,7 @@ #include "hw/remote/memory.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qapi/error.h" static void remote_sysmem_reset(void) diff --git a/hw/remote/proxy-memory-listener.c b/hw/remote/proxy-memory-listener.c index a926f61ebe..3948751ed7 100644 --- a/hw/remote/proxy-memory-listener.c +++ b/hw/remote/proxy-memory-listener.c @@ -13,6 +13,7 @@ #include "exec/memory.h" #include "exec/cpu-common.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qapi/error.h" #include "qemu/error-report.h" #include "hw/remote/mpqemu-link.h" diff --git a/hw/s390x/s390-stattrib-kvm.c b/hw/s390x/s390-stattrib-kvm.c index eeaa811098..b495d81296 100644 --- a/hw/s390x/s390-stattrib-kvm.c +++ b/hw/s390x/s390-stattrib-kvm.c @@ -16,6 +16,7 @@ #include "qemu/error-report.h" #include "sysemu/kvm.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "kvm/kvm_s390x.h" #include "qapi/error.h" diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c index c4259b5327..fe7945e856 100644 --- a/hw/s390x/s390-stattrib.c +++ b/hw/s390x/s390-stattrib.c @@ -17,6 +17,7 @@ #include "hw/s390x/storage-attributes.h" #include "qemu/error-report.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qapi/error.h" #include "qapi/qmp/qdict.h" #include "cpu.h" diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index fe03f716f3..5b6fe1a18a 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -14,6 +14,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "exec/confidential-guest-support.h" #include "hw/boards.h" #include "hw/s390x/s390-virtio-hcall.h" diff --git a/hw/vfio/common.c b/hw/vfio/common.c index dcef44fe55..2e7a02cd4b 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -30,6 +30,7 @@ #include "exec/address-spaces.h" #include "exec/memory.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "hw/hw.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" diff --git a/hw/vfio/container.c b/hw/vfio/container.c index 9ccdb639ac..f0bc9e8c2b 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -26,6 +26,7 @@ #include "exec/address-spaces.h" #include "exec/memory.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qemu/error-report.h" #include "qemu/range.h" #include "sysemu/reset.h" diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index e7bece4ea1..120c82f3de 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -26,6 +26,7 @@ #include "qemu/chardev_open.h" #include "pci.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" static int iommufd_cdev_map(const VFIOContainerBase *bcontainer, hwaddr iova, ram_addr_t size, void *vaddr, bool readonly) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 01aa11013e..f5698eeae0 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -27,6 +27,7 @@ #include "qapi/qapi-events-vfio.h" #include "exec/ramlist.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "pci.h" #include "trace.h" #include "hw/hw.h" diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c index 018bd20481..980147338a 100644 --- a/hw/vfio/spapr.c +++ b/hw/vfio/spapr.c @@ -20,6 +20,7 @@ #include "hw/vfio/vfio-common.h" #include "hw/hw.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qemu/error-report.h" #include "qapi/error.h" #include "trace.h" diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c index 80ada89551..dae94dbbde 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -25,6 +25,7 @@ #include "qapi/error.h" #include "qapi/visitor.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "migration/misc.h" #include "hw/boards.h" #include "hw/qdev-properties.h" diff --git a/migration/ram.c b/migration/ram.c index 05ff9eb328..82c44e8213 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -49,6 +49,7 @@ #include "qapi/qmp/qerror.h" #include "trace.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "exec/target_page.h" #include "qemu/rcu_queue.h" #include "migration/colo.h" diff --git a/plugins/api.c b/plugins/api.c index 24ea64e2de..77b55cff74 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -50,6 +50,7 @@ #include "qapi/error.h" #include "migration/blocker.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qemu/plugin-memory.h" #include "hw/boards.h" #else diff --git a/system/memory.c b/system/memory.c index 85f6834cb3..7eae1bbda7 100644 --- a/system/memory.c +++ b/system/memory.c @@ -27,6 +27,7 @@ #include "exec/memory-internal.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "sysemu/kvm.h" #include "sysemu/runstate.h" #include "sysemu/tcg.h" diff --git a/system/physmem.c b/system/physmem.c index 3f937a5e58..26cfb84454 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -67,6 +67,7 @@ #include "exec/memory-internal.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "qemu/pmem.h" diff --git a/target/arm/tcg/mte_helper.c b/target/arm/tcg/mte_helper.c index b017b26d07..0950a1c6f1 100644 --- a/target/arm/tcg/mte_helper.c +++ b/target/arm/tcg/mte_helper.c @@ -25,6 +25,7 @@ #include "exec/page-protection.h" #ifndef CONFIG_USER_ONLY #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #endif #include "exec/cpu_ldst.h" #include "exec/helper-proto.h" diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index 3efc28f18b..f764931426 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -42,6 +42,7 @@ #include "gdbstub/enums.h" #include "exec/memattrs.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "sysemu/hostmem.h" #include "qemu/cutils.h" #include "qemu/main-loop.h" diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 8ffe0159d8..c8045d873c 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -42,6 +42,7 @@ #include "sysemu/device_tree.h" #include "gdbstub/enums.h" #include "exec/ram_addr.h" +#include "sysemu/physmem-target.h" #include "trace.h" #include "hw/s390x/s390-pci-inst.h" #include "hw/s390x/s390-pci-bus.h"