openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

memory: cpu_physical_memory_mask_dirty_range() always clears a single flag 

Document it

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
This commit is contained in:
Juan Quintela 2013-10-08 12:44:04 +02:00
parent 75218e7f2b
commit 5215919291
5 changed files with 34 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
cputlb.c
View File

@ -114,7 +114,7 @@ void tlb_protect_code(ram_addr_t ram_addr)
{
cpu_physical_memory_reset_dirty(ram_addr,
ram_addr + TARGET_PAGE_SIZE,
CODE_DIRTY_FLAG);
DIRTY_MEMORY_CODE);
}
/* update the TLB so that writes in physical page 'phys_addr' are no longer
@ -122,7 +122,7 @@ void tlb_protect_code(ram_addr_t ram_addr)
void tlb_unprotect_code_phys(CPUArchState *env, ram_addr_t ram_addr,
target_ulong vaddr)
{
cpu_physical_memory_set_dirty_flag(ram_addr, CODE_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(ram_addr, DIRTY_MEMORY_CODE);
}
static bool tlb_is_dirty_ram(CPUTLBEntry *tlbe)

19
exec.c
View File

@ -738,7 +738,7 @@ static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t end,
/* Note: start and end must be within the same ram block. */
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
int dirty_flags)
unsigned client)
{
uintptr_t length;
@ -748,7 +748,7 @@ void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
length = end - start;
if (length == 0)
return;
cpu_physical_memory_mask_dirty_range(start, length, dirty_flags);
cpu_physical_memory_mask_dirty_range(start, length, client);
if (tcg_enabled()) {
tlb_reset_dirty_range_all(start, end, length);
@ -1485,7 +1485,7 @@ found:
static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
uint64_t val, unsigned size)
{
if (!cpu_physical_memory_get_dirty_flag(ram_addr, CODE_DIRTY_FLAG)) {
if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) {
tb_invalidate_phys_page_fast(ram_addr, size);
}
switch (size) {
@ -1501,8 +1501,8 @@ static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
default:
abort();
}
cpu_physical_memory_set_dirty_flag(ram_addr, MIGRATION_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(ram_addr, VGA_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(ram_addr, DIRTY_MEMORY_MIGRATION);
cpu_physical_memory_set_dirty_flag(ram_addr, DIRTY_MEMORY_VGA);
/* we remove the notdirty callback only if the code has been
flushed */
if (cpu_physical_memory_is_dirty(ram_addr)) {
@ -1912,8 +1912,8 @@ static void invalidate_and_set_dirty(hwaddr addr,
/* invalidate code */
tb_invalidate_phys_page_range(addr, addr + length, 0);
/* set dirty bit */
cpu_physical_memory_set_dirty_flag(addr, VGA_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr, MIGRATION_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr, DIRTY_MEMORY_VGA);
cpu_physical_memory_set_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
}
xen_modified_memory(addr, length);
}
@ -2528,8 +2528,9 @@ void stl_phys_notdirty(hwaddr addr, uint32_t val)
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
/* set dirty bit */
cpu_physical_memory_set_dirty_flag(addr1, MIGRATION_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr1, VGA_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr1,
DIRTY_MEMORY_MIGRATION);
cpu_physical_memory_set_dirty_flag(addr1, DIRTY_MEMORY_VGA);
}
}
}

40
include/exec/memory-internal.h
View File

@ -40,29 +40,25 @@ void *qemu_get_ram_ptr(ram_addr_t addr);
void qemu_ram_free(ram_addr_t addr);
void qemu_ram_free_from_ptr(ram_addr_t addr);
#define VGA_DIRTY_FLAG 0x01
#define CODE_DIRTY_FLAG 0x02
#define MIGRATION_DIRTY_FLAG 0x08
static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
int dirty_flag)
unsigned client)
{
return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] & dirty_flag;
return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] & (1 << client);
}
/* read dirty bit (return 0 or 1) */
static inline bool cpu_physical_memory_is_dirty(ram_addr_t addr)
{
bool vga = cpu_physical_memory_get_dirty_flag(addr, VGA_DIRTY_FLAG);
bool code = cpu_physical_memory_get_dirty_flag(addr, CODE_DIRTY_FLAG);
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, MIGRATION_DIRTY_FLAG);
cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
return vga && code && migration;
}
static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
ram_addr_t length,
int dirty_flag)
unsigned client)
{
int ret = 0;
ram_addr_t addr, end;
@ -70,28 +66,28 @@ static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
end = TARGET_PAGE_ALIGN(start + length);
start &= TARGET_PAGE_MASK;
for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
ret |= cpu_physical_memory_get_dirty_flag(addr, dirty_flag);
ret |= cpu_physical_memory_get_dirty_flag(addr, client);
}
return ret;
}
static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
int dirty_flag)
unsigned client)
{
ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flag;
ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= (1 << client);
}
static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
{
cpu_physical_memory_set_dirty_flag(addr, MIGRATION_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr, VGA_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr, CODE_DIRTY_FLAG);
cpu_physical_memory_set_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
cpu_physical_memory_set_dirty_flag(addr, DIRTY_MEMORY_VGA);
cpu_physical_memory_set_dirty_flag(addr, DIRTY_MEMORY_CODE);
}
static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
int dirty_flags)
static inline int cpu_physical_memory_clear_dirty_flag(ram_addr_t addr,
unsigned client)
{
int mask = ~dirty_flags;
int mask = ~(1 << client);
return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] &= mask;
}
@ -111,19 +107,19 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
ram_addr_t length,
int dirty_flags)
unsigned client)
{
ram_addr_t addr, end;
end = TARGET_PAGE_ALIGN(start + length);
start &= TARGET_PAGE_MASK;
for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
cpu_physical_memory_clear_dirty_flag(addr, client);
}
}
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
int dirty_flags);
unsigned client);
#endif

3
include/exec/memory.h
View File

@ -33,9 +33,6 @@
typedef struct MemoryRegionOps MemoryRegionOps;
typedef struct MemoryRegionMmio MemoryRegionMmio;
/* Must match *_DIRTY_FLAGS in cpu-all.h. To be replaced with dynamic
* registration.
*/
#define DIRTY_MEMORY_VGA 0
#define DIRTY_MEMORY_CODE 1
#define DIRTY_MEMORY_MIGRATION 3

10
memory.c
View File

@ -1174,8 +1174,7 @@ bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
hwaddr size, unsigned client)
{
assert(mr->terminates);
return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
1 << client);
return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
}
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
@ -1190,12 +1189,11 @@ bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
{
bool ret;
assert(mr->terminates);
ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
1 << client);
ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
if (ret) {
cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
mr->ram_addr + addr + size,
1 << client);
client);
}
return ret;
}
@ -1243,7 +1241,7 @@ void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
assert(mr->terminates);
cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
mr->ram_addr + addr + size,
1 << client);
client);
}
void *memory_region_get_ram_ptr(MemoryRegion *mr)