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ramblock: add RAMBLOCK_FOREACH() 

So that it can simplifies the iterators.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1494562661-9063-2-git-send-email-peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Peter Xu 2017-05-12 12:17:39 +08:00 committed by Dr. David Alan Gilbert
parent cdece0467c
commit 99e15582de
3 changed files with 23 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
exec.c
View File

@ -978,7 +978,7 @@ static RAMBlock *qemu_get_ram_block(ram_addr_t addr)
if (block && addr - block->offset < block->max_length) { if (block && addr - block->offset < block->max_length) {
return block; return block;
} }
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
if (addr - block->offset < block->max_length) { if (addr - block->offset < block->max_length) {
goto found; goto found;
} }
@ -1578,12 +1578,12 @@ static ram_addr_t find_ram_offset(ram_addr_t size)
return 0; return 0;
} }
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
ram_addr_t end, next = RAM_ADDR_MAX; ram_addr_t end, next = RAM_ADDR_MAX;
end = block->offset + block->max_length; end = block->offset + block->max_length;
QLIST_FOREACH_RCU(next_block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(next_block) {
if (next_block->offset >= end) { if (next_block->offset >= end) {
next = MIN(next, next_block->offset); next = MIN(next, next_block->offset);
} }
@ -1609,7 +1609,7 @@ unsigned long last_ram_page(void)
ram_addr_t last = 0; ram_addr_t last = 0;
rcu_read_lock(); rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
last = MAX(last, block->offset + block->max_length); last = MAX(last, block->offset + block->max_length);
} }
rcu_read_unlock(); rcu_read_unlock();
@ -1659,7 +1659,7 @@ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev)
pstrcat(new_block->idstr, sizeof(new_block->idstr), name); pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
rcu_read_lock(); rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
if (block != new_block && if (block != new_block &&
!strcmp(block->idstr, new_block->idstr)) { !strcmp(block->idstr, new_block->idstr)) {
fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
@ -1693,7 +1693,7 @@ size_t qemu_ram_pagesize_largest(void)
RAMBlock *block; RAMBlock *block;
size_t largest = 0; size_t largest = 0;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
largest = MAX(largest, qemu_ram_pagesize(block)); largest = MAX(largest, qemu_ram_pagesize(block));
} }
@ -1839,7 +1839,7 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
* QLIST (which has an RCU-friendly variant) does not have insertion at * QLIST (which has an RCU-friendly variant) does not have insertion at
* tail, so save the last element in last_block. * tail, so save the last element in last_block.
*/ */
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
last_block = block; last_block = block;
if (block->max_length < new_block->max_length) { if (block->max_length < new_block->max_length) {
break; break;
@ -2021,7 +2021,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
int flags; int flags;
void *area, *vaddr; void *area, *vaddr;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
offset = addr - block->offset; offset = addr - block->offset;
if (offset < block->max_length) { if (offset < block->max_length) {
vaddr = ramblock_ptr(block, offset); vaddr = ramblock_ptr(block, offset);
@ -2167,7 +2167,7 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
goto found; goto found;
} }
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
/* This case append when the block is not mapped. */ /* This case append when the block is not mapped. */
if (block->host == NULL) { if (block->host == NULL) {
continue; continue;
@ -2200,7 +2200,7 @@ RAMBlock *qemu_ram_block_by_name(const char *name)
{ {
RAMBlock *block; RAMBlock *block;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
if (!strcmp(name, block->idstr)) { if (!strcmp(name, block->idstr)) {
return block; return block;
} }
@ -3424,7 +3424,7 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
int ret = 0; int ret = 0;
rcu_read_lock(); rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
ret = func(block->idstr, block->host, block->offset, ret = func(block->idstr, block->host, block->offset,
block->used_length, opaque); block->used_length, opaque);
if (ret) { if (ret) {

5
include/exec/ramlist.h
View File

@ -4,6 +4,7 @@
#include "qemu/queue.h" #include "qemu/queue.h"
#include "qemu/thread.h" #include "qemu/thread.h"
#include "qemu/rcu.h" #include "qemu/rcu.h"
#include "qemu/rcu_queue.h"
typedef struct RAMBlockNotifier RAMBlockNotifier; typedef struct RAMBlockNotifier RAMBlockNotifier;
@ -54,6 +55,10 @@ typedef struct RAMList {
} RAMList; } RAMList;
extern RAMList ram_list; extern RAMList ram_list;
/* Should be holding either ram_list.mutex, or the RCU lock. */
#define RAMBLOCK_FOREACH(block) \
QLIST_FOREACH_RCU(block, &ram_list.blocks, next)
void qemu_mutex_lock_ramlist(void); void qemu_mutex_lock_ramlist(void);
void qemu_mutex_unlock_ramlist(void); void qemu_mutex_unlock_ramlist(void);

13
migration/ram.c
View File

@ -648,7 +648,7 @@ uint64_t ram_pagesize_summary(void)
RAMBlock *block; RAMBlock *block;
uint64_t summary = 0; uint64_t summary = 0;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
summary |= block->page_size; summary |= block->page_size;
} }
@ -676,7 +676,7 @@ static void migration_bitmap_sync(RAMState *rs)
qemu_mutex_lock(&rs->bitmap_mutex); qemu_mutex_lock(&rs->bitmap_mutex);
rcu_read_lock(); rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
migration_bitmap_sync_range(rs, block, 0, block->used_length); migration_bitmap_sync_range(rs, block, 0, block->used_length);
} }
rcu_read_unlock(); rcu_read_unlock();
@ -1408,8 +1408,9 @@ uint64_t ram_bytes_total(void)
uint64_t total = 0; uint64_t total = 0;
rcu_read_lock(); rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) RAMBLOCK_FOREACH(block) {
total += block->used_length; total += block->used_length;
}
rcu_read_unlock(); rcu_read_unlock();
return total; return total;
} }
@ -1500,7 +1501,7 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
{ {
struct RAMBlock *block; struct RAMBlock *block;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
unsigned long *bitmap = block->bmap; unsigned long *bitmap = block->bmap;
unsigned long range = block->used_length >> TARGET_PAGE_BITS; unsigned long range = block->used_length >> TARGET_PAGE_BITS;
unsigned long run_start = find_next_zero_bit(bitmap, range, 0); unsigned long run_start = find_next_zero_bit(bitmap, range, 0);
@ -1578,7 +1579,7 @@ static int postcopy_each_ram_send_discard(MigrationState *ms)
struct RAMBlock *block; struct RAMBlock *block;
int ret; int ret;
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
PostcopyDiscardState *pds = PostcopyDiscardState *pds =
postcopy_discard_send_init(ms, block->idstr); postcopy_discard_send_init(ms, block->idstr);
@ -1961,7 +1962,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { RAMBLOCK_FOREACH(block) {
qemu_put_byte(f, strlen(block->idstr)); qemu_put_byte(f, strlen(block->idstr));
qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
qemu_put_be64(f, block->used_length); qemu_put_be64(f, block->used_length);