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memory: propagate errors on I/O dispatch

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Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-24 16:10:39 +02:00
parent a649b9168c
commit 791af8c861
4 changed files with 36 additions and 30 deletions
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21
exec.c
View File

@ -1526,6 +1526,8 @@ static uint64_t subpage_read(void *opaque, hwaddr addr,
{
subpage_t *mmio = opaque;
unsigned int idx = SUBPAGE_IDX(addr);
uint64_t val;
MemoryRegionSection *section;
#if defined(DEBUG_SUBPAGE)
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__,
@ -1536,7 +1538,8 @@ static uint64_t subpage_read(void *opaque, hwaddr addr,
addr += mmio->base;
addr -= section->offset_within_address_space;
addr += section->offset_within_region;
return io_mem_read(section->mr, addr, len);
io_mem_read(section->mr, addr, &val, len);
return val;
}
static void subpage_write(void *opaque, hwaddr addr,
@ -1904,7 +1907,7 @@ void address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
{
hwaddr l;
uint8_t *ptr;
uint32_t val;
uint64_t val;
hwaddr addr1;
MemoryRegionSection *section;
@ -1943,15 +1946,15 @@ void address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
l = memory_access_size(l, addr1);
if (l == 4) {
/* 32 bit read access */
val = io_mem_read(section->mr, addr1, 4);
io_mem_read(section->mr, addr1, &val, 4);
stl_p(buf, val);
} else if (l == 2) {
/* 16 bit read access */
val = io_mem_read(section->mr, addr1, 2);
io_mem_read(section->mr, addr1, &val, 2);
stw_p(buf, val);
} else {
/* 8 bit read access */
val = io_mem_read(section->mr, addr1, 1);
io_mem_read(section->mr, addr1, &val, 1);
stb_p(buf, val);
}
} else {
@ -2195,7 +2198,7 @@ static inline uint32_t ldl_phys_internal(hwaddr addr,
enum device_endian endian)
{
uint8_t *ptr;
uint32_t val;
uint64_t val;
MemoryRegionSection *section;
hwaddr l = 4;
hwaddr addr1;
@ -2204,7 +2207,7 @@ static inline uint32_t ldl_phys_internal(hwaddr addr,
false);
if (l < 4 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
val = io_mem_read(section->mr, addr1, 4);
io_mem_read(section->mr, addr1, &val, 4);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap32(val);
@ -2263,7 +2266,7 @@ static inline uint64_t ldq_phys_internal(hwaddr addr,
false);
if (l < 8 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
val = io_mem_read(section->mr, addr1, 8);
io_mem_read(section->mr, addr1, &val, 8);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap64(val);
@ -2330,7 +2333,7 @@ static inline uint32_t lduw_phys_internal(hwaddr addr,
false);
if (l < 2 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
val = io_mem_read(section->mr, addr1, 2);
io_mem_read(section->mr, addr1, &val, 2);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap16(val);

6
include/exec/exec-all.h
View File

@ -367,9 +367,9 @@ bool is_tcg_gen_code(uintptr_t pc_ptr);
#if !defined(CONFIG_USER_ONLY)
struct MemoryRegion *iotlb_to_region(hwaddr index);
uint64_t io_mem_read(struct MemoryRegion *mr, hwaddr addr,
unsigned size);
void io_mem_write(struct MemoryRegion *mr, hwaddr addr,
bool io_mem_read(struct MemoryRegion *mr, hwaddr addr,
uint64_t *pvalue, unsigned size);
bool io_mem_write(struct MemoryRegion *mr, hwaddr addr,
uint64_t value, unsigned size);
void tlb_fill(CPUArchState *env1, target_ulong addr, int is_write, int mmu_idx,

4
include/exec/softmmu_template.h
View File

@ -63,6 +63,7 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
target_ulong addr,
uintptr_t retaddr)
{
uint64_t val;
MemoryRegion *mr = iotlb_to_region(physaddr);
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
@ -72,7 +73,8 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
}
env->mem_io_vaddr = addr;
return io_mem_read(mr, physaddr, 1 << SHIFT);
io_mem_read(mr, physaddr, &val, 1 << SHIFT);
return val;
}
/* handle all cases except unaligned access which span two pages */

35
memory.c
View File

@ -928,10 +928,6 @@ static uint64_t memory_region_dispatch_read1(MemoryRegion *mr,
{
uint64_t data = 0;
if (!memory_region_access_valid(mr, addr, size, false)) {
return unassigned_mem_read(mr, addr, size);
}
if (mr->ops->read) {
access_with_adjusted_size(addr, &data, size,
mr->ops->impl.min_access_size,
@ -966,25 +962,29 @@ static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
}
}
static uint64_t memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
unsigned size)
static bool memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
unsigned size)
{
uint64_t ret;
if (!memory_region_access_valid(mr, addr, size, false)) {
*pval = unassigned_mem_read(mr, addr, size);
return true;
}
ret = memory_region_dispatch_read1(mr, addr, size);
adjust_endianness(mr, &ret, size);
return ret;
*pval = memory_region_dispatch_read1(mr, addr, size);
adjust_endianness(mr, pval, size);
return false;
}
static void memory_region_dispatch_write(MemoryRegion *mr,
static bool memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
unsigned size)
{
if (!memory_region_access_valid(mr, addr, size, true)) {
unassigned_mem_write(mr, addr, data, size);
return;
return true;
}
adjust_endianness(mr, &data, size);
@ -998,6 +998,7 @@ static void memory_region_dispatch_write(MemoryRegion *mr,
access_with_adjusted_size(addr, &data, size, 1, 4,
memory_region_oldmmio_write_accessor, mr);
}
return false;
}
void memory_region_init_io(MemoryRegion *mr,
@ -1650,15 +1651,15 @@ void address_space_destroy(AddressSpace *as)
g_free(as->ioeventfds);
}
uint64_t io_mem_read(MemoryRegion *mr, hwaddr addr, unsigned size)
bool io_mem_read(MemoryRegion *mr, hwaddr addr, uint64_t *pval, unsigned size)
{
return memory_region_dispatch_read(mr, addr, size);
return memory_region_dispatch_read(mr, addr, pval, size);
}
void io_mem_write(MemoryRegion *mr, hwaddr addr,
bool io_mem_write(MemoryRegion *mr, hwaddr addr,
uint64_t val, unsigned size)
{
memory_region_dispatch_write(mr, addr, val, size);
return memory_region_dispatch_write(mr, addr, val, size);
}
typedef struct MemoryRegionList MemoryRegionList;