*/
#define RAM_RESIZEABLE (1 << 2)
-/* RAM is backed by an mmapped file.
- */
-#define RAM_FILE (1 << 3)
#endif
struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
return section;
}
-static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
-{
- if (memory_region_is_ram(mr)) {
- return !(is_write && mr->readonly);
- }
- if (memory_region_is_romd(mr)) {
- return !is_write;
- }
-
- return false;
-}
-
/* Called from RCU critical section */
MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
hwaddr *xlat, hwaddr *plen,
/* Called from RCU critical section */
MemoryRegionSection *
-address_space_translate_for_iotlb(CPUState *cpu, hwaddr addr,
+address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr,
hwaddr *xlat, hwaddr *plen)
{
MemoryRegionSection *section;
- section = address_space_translate_internal(cpu->cpu_ases[0].memory_dispatch,
- addr, xlat, plen, false);
+ AddressSpaceDispatch *d = cpu->cpu_ases[asidx].memory_dispatch;
+
+ section = address_space_translate_internal(d, addr, xlat, plen, false);
assert(!section->mr->iommu_ops);
return section;
}
#if !defined(CONFIG_USER_ONLY)
-void tcg_cpu_address_space_init(CPUState *cpu, AddressSpace *as)
+void cpu_address_space_init(CPUState *cpu, AddressSpace *as, int asidx)
{
- /* We only support one address space per cpu at the moment. */
- assert(cpu->as == as);
+ CPUAddressSpace *newas;
- if (cpu->cpu_ases) {
- /* We've already registered the listener for our only AS */
- return;
+ /* Target code should have set num_ases before calling us */
+ assert(asidx < cpu->num_ases);
+
+ if (asidx == 0) {
+ /* address space 0 gets the convenience alias */
+ cpu->as = as;
}
- cpu->cpu_ases = g_new0(CPUAddressSpace, 1);
- cpu->cpu_ases[0].cpu = cpu;
- cpu->cpu_ases[0].as = as;
- cpu->cpu_ases[0].tcg_as_listener.commit = tcg_commit;
- memory_listener_register(&cpu->cpu_ases[0].tcg_as_listener, as);
+ /* KVM cannot currently support multiple address spaces. */
+ assert(asidx == 0 || !kvm_enabled());
+
+ if (!cpu->cpu_ases) {
+ cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases);
+ }
+
+ newas = &cpu->cpu_ases[asidx];
+ newas->cpu = cpu;
+ newas->as = as;
+ if (tcg_enabled()) {
+ newas->tcg_as_listener.commit = tcg_commit;
+ memory_listener_register(&newas->tcg_as_listener, as);
+ }
+}
+
+AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx)
+{
+ /* Return the AddressSpace corresponding to the specified index */
+ return cpu->cpu_ases[asidx].as;
}
#endif
int cpu_index;
Error *local_err = NULL;
+ cpu->as = NULL;
+ cpu->num_ases = 0;
+
#ifndef CONFIG_USER_ONLY
- cpu->as = &address_space_memory;
cpu->thread_id = qemu_get_thread_id();
+
+ /* This is a softmmu CPU object, so create a property for it
+ * so users can wire up its memory. (This can't go in qom/cpu.c
+ * because that file is compiled only once for both user-mode
+ * and system builds.) The default if no link is set up is to use
+ * the system address space.
+ */
+ object_property_add_link(OBJECT(cpu), "memory", TYPE_MEMORY_REGION,
+ (Object **)&cpu->memory,
+ qdev_prop_allow_set_link_before_realize,
+ OBJ_PROP_LINK_UNREF_ON_RELEASE,
+ &error_abort);
+ cpu->memory = system_memory;
+ object_ref(OBJECT(cpu->memory));
#endif
#if defined(CONFIG_USER_ONLY)
#else
static void breakpoint_invalidate(CPUState *cpu, target_ulong pc)
{
- hwaddr phys = cpu_get_phys_page_debug(cpu, pc);
+ MemTxAttrs attrs;
+ hwaddr phys = cpu_get_phys_page_attrs_debug(cpu, pc, &attrs);
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
if (phys != -1) {
- tb_invalidate_phys_addr(cpu->as,
+ tb_invalidate_phys_addr(cpu->cpu_ases[asidx].as,
phys | (pc & ~TARGET_PAGE_MASK));
}
}
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP);
- if (qemu_log_enabled()) {
+ if (qemu_log_separate()) {
qemu_log("qemu: fatal: ");
qemu_log_vprintf(fmt, ap2);
qemu_log("\n");
static void phys_section_destroy(MemoryRegion *mr)
{
+ bool have_sub_page = mr->subpage;
+
memory_region_unref(mr);
- if (mr->subpage) {
+ if (have_sub_page) {
subpage_t *subpage = container_of(mr, subpage_t, iomem);
object_unref(OBJECT(&subpage->iomem));
g_free(subpage);
return 0;
}
- if (fs.f_type != HUGETLBFS_MAGIC)
- fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path);
-
return fs.f_bsize;
}
assert(block);
- newsize = TARGET_PAGE_ALIGN(newsize);
+ newsize = HOST_PAGE_ALIGN(newsize);
if (block->used_length == newsize) {
return 0;
RAMBlock *block;
RAMBlock *last_block = NULL;
ram_addr_t old_ram_size, new_ram_size;
+ Error *err = NULL;
old_ram_size = last_ram_offset() >> TARGET_PAGE_BITS;
if (!new_block->host) {
if (xen_enabled()) {
xen_ram_alloc(new_block->offset, new_block->max_length,
- new_block->mr);
+ new_block->mr, &err);
+ if (err) {
+ error_propagate(errp, err);
+ qemu_mutex_unlock_ramlist();
+ return -1;
+ }
} else {
new_block->host = phys_mem_alloc(new_block->max_length,
&new_block->mr->align);
return -1;
}
- size = TARGET_PAGE_ALIGN(size);
+ size = HOST_PAGE_ALIGN(size);
new_block = g_malloc0(sizeof(*new_block));
new_block->mr = mr;
new_block->used_length = size;
new_block->max_length = size;
new_block->flags = share ? RAM_SHARED : 0;
- new_block->flags |= RAM_FILE;
new_block->host = file_ram_alloc(new_block, size,
mem_path, errp);
if (!new_block->host) {
ram_addr_t addr;
Error *local_err = NULL;
- size = TARGET_PAGE_ALIGN(size);
- max_size = TARGET_PAGE_ALIGN(max_size);
+ size = HOST_PAGE_ALIGN(size);
+ max_size = HOST_PAGE_ALIGN(max_size);
new_block = g_malloc0(sizeof(*new_block));
new_block->mr = mr;
new_block->resized = resized;
return qemu_ram_alloc_internal(size, maxsz, resized, NULL, true, mr, errp);
}
-void qemu_ram_free_from_ptr(ram_addr_t addr)
-{
- RAMBlock *block;
-
- qemu_mutex_lock_ramlist();
- QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
- if (addr == block->offset) {
- QLIST_REMOVE_RCU(block, next);
- ram_list.mru_block = NULL;
- /* Write list before version */
- smp_wmb();
- ram_list.version++;
- g_free_rcu(block, rcu);
- break;
- }
- }
- qemu_mutex_unlock_ramlist();
-}
-
static void reclaim_ramblock(RAMBlock *block)
{
if (block->flags & RAM_PREALLOC) {
xen_invalidate_map_cache_entry(block->host);
#ifndef _WIN32
} else if (block->fd >= 0) {
- if (block->flags & RAM_FILE) {
- qemu_ram_munmap(block->host, block->max_length);
- } else {
- munmap(block->host, block->max_length);
- }
+ qemu_ram_munmap(block->host, block->max_length);
close(block->fd);
#endif
} else {
return fd;
}
+void qemu_set_ram_fd(ram_addr_t addr, int fd)
+{
+ RAMBlock *block;
+
+ rcu_read_lock();
+ block = qemu_get_ram_block(addr);
+ block->fd = fd;
+ rcu_read_unlock();
+}
+
void *qemu_get_ram_block_host_ptr(ram_addr_t addr)
{
RAMBlock *block;
* or address_space_rw instead. For local memory (e.g. video ram) that the
* device owns, use memory_region_get_ram_ptr.
*
- * By the time this function returns, the returned pointer is not protected
- * by RCU anymore. If the caller is not within an RCU critical section and
- * does not hold the iothread lock, it must have other means of protecting the
- * pointer, such as a reference to the region that includes the incoming
- * ram_addr_t.
+ * Called within RCU critical section.
*/
void *qemu_get_ram_ptr(ram_addr_t addr)
{
- RAMBlock *block;
- void *ptr;
-
- rcu_read_lock();
- block = qemu_get_ram_block(addr);
+ RAMBlock *block = qemu_get_ram_block(addr);
if (xen_enabled() && block->host == NULL) {
/* We need to check if the requested address is in the RAM
* In that case just map until the end of the page.
*/
if (block->offset == 0) {
- ptr = xen_map_cache(addr, 0, 0);
- goto unlock;
+ return xen_map_cache(addr, 0, 0);
}
block->host = xen_map_cache(block->offset, block->max_length, 1);
}
- ptr = ramblock_ptr(block, addr - block->offset);
-
-unlock:
- rcu_read_unlock();
- return ptr;
+ return ramblock_ptr(block, addr - block->offset);
}
/* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
* but takes a size argument.
*
- * By the time this function returns, the returned pointer is not protected
- * by RCU anymore. If the caller is not within an RCU critical section and
- * does not hold the iothread lock, it must have other means of protecting the
- * pointer, such as a reference to the region that includes the incoming
- * ram_addr_t.
+ * Called within RCU critical section.
*/
static void *qemu_ram_ptr_length(ram_addr_t addr, hwaddr *size)
{
- void *ptr;
+ RAMBlock *block;
+ ram_addr_t offset_inside_block;
if (*size == 0) {
return NULL;
}
- if (xen_enabled()) {
- return xen_map_cache(addr, *size, 1);
- } else {
- RAMBlock *block;
- rcu_read_lock();
- QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
- if (addr - block->offset < block->max_length) {
- if (addr - block->offset + *size > block->max_length)
- *size = block->max_length - addr + block->offset;
- ptr = ramblock_ptr(block, addr - block->offset);
- rcu_read_unlock();
- return ptr;
- }
+
+ block = qemu_get_ram_block(addr);
+ offset_inside_block = addr - block->offset;
+ *size = MIN(*size, block->max_length - offset_inside_block);
+
+ if (xen_enabled() && block->host == NULL) {
+ /* We need to check if the requested address is in the RAM
+ * because we don't want to map the entire memory in QEMU.
+ * In that case just map the requested area.
+ */
+ if (block->offset == 0) {
+ return xen_map_cache(addr, *size, 1);
}
- fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
- abort();
+ block->host = xen_map_cache(block->offset, block->max_length, 1);
}
+
+ return ramblock_ptr(block, offset_inside_block);
}
/*
return block->mr;
}
+/* Called within RCU critical section. */
static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
uint64_t val, unsigned size)
{
{
MemTxResult res;
uint64_t data;
+ int asidx = cpu_asidx_from_attrs(current_cpu, attrs);
+ AddressSpace *as = current_cpu->cpu_ases[asidx].as;
check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_READ);
switch (size) {
case 1:
- data = address_space_ldub(&address_space_memory, addr, attrs, &res);
+ data = address_space_ldub(as, addr, attrs, &res);
break;
case 2:
- data = address_space_lduw(&address_space_memory, addr, attrs, &res);
+ data = address_space_lduw(as, addr, attrs, &res);
break;
case 4:
- data = address_space_ldl(&address_space_memory, addr, attrs, &res);
+ data = address_space_ldl(as, addr, attrs, &res);
break;
default: abort();
}
MemTxAttrs attrs)
{
MemTxResult res;
+ int asidx = cpu_asidx_from_attrs(current_cpu, attrs);
+ AddressSpace *as = current_cpu->cpu_ases[asidx].as;
check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_WRITE);
switch (size) {
case 1:
- address_space_stb(&address_space_memory, addr, val, attrs, &res);
+ address_space_stb(as, addr, val, attrs, &res);
break;
case 2:
- address_space_stw(&address_space_memory, addr, val, attrs, &res);
+ address_space_stw(as, addr, val, attrs, &res);
break;
case 4:
- address_space_stl(&address_space_memory, addr, val, attrs, &res);
+ address_space_stl(as, addr, val, attrs, &res);
break;
default: abort();
}
return phys_section_add(map, §ion);
}
-MemoryRegion *iotlb_to_region(CPUState *cpu, hwaddr index)
+MemoryRegion *iotlb_to_region(CPUState *cpu, hwaddr index, MemTxAttrs attrs)
{
- CPUAddressSpace *cpuas = &cpu->cpu_ases[0];
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
+ CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx];
AddressSpaceDispatch *d = atomic_rcu_read(&cpuas->memory_dispatch);
MemoryRegionSection *sections = d->map.sections;
return release_lock;
}
-MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
- uint8_t *buf, int len, bool is_write)
+/* Called within RCU critical section. */
+static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr,
+ MemTxAttrs attrs,
+ const uint8_t *buf,
+ int len, hwaddr addr1,
+ hwaddr l, MemoryRegion *mr)
{
- hwaddr l;
uint8_t *ptr;
uint64_t val;
- hwaddr addr1;
- MemoryRegion *mr;
MemTxResult result = MEMTX_OK;
bool release_lock = false;
- rcu_read_lock();
- while (len > 0) {
- l = len;
- mr = address_space_translate(as, addr, &addr1, &l, is_write);
-
- if (is_write) {
- if (!memory_access_is_direct(mr, is_write)) {
- release_lock |= prepare_mmio_access(mr);
- l = memory_access_size(mr, l, addr1);
- /* XXX: could force current_cpu to NULL to avoid
- potential bugs */
- switch (l) {
- case 8:
- /* 64 bit write access */
- val = ldq_p(buf);
- result |= memory_region_dispatch_write(mr, addr1, val, 8,
- attrs);
- break;
- case 4:
- /* 32 bit write access */
- val = ldl_p(buf);
- result |= memory_region_dispatch_write(mr, addr1, val, 4,
- attrs);
- break;
- case 2:
- /* 16 bit write access */
- val = lduw_p(buf);
- result |= memory_region_dispatch_write(mr, addr1, val, 2,
- attrs);
- break;
- case 1:
- /* 8 bit write access */
- val = ldub_p(buf);
- result |= memory_region_dispatch_write(mr, addr1, val, 1,
- attrs);
- break;
- default:
- abort();
- }
- } else {
- addr1 += memory_region_get_ram_addr(mr);
- /* RAM case */
- ptr = qemu_get_ram_ptr(addr1);
- memcpy(ptr, buf, l);
- invalidate_and_set_dirty(mr, addr1, l);
+ for (;;) {
+ if (!memory_access_is_direct(mr, true)) {
+ release_lock |= prepare_mmio_access(mr);
+ l = memory_access_size(mr, l, addr1);
+ /* XXX: could force current_cpu to NULL to avoid
+ potential bugs */
+ switch (l) {
+ case 8:
+ /* 64 bit write access */
+ val = ldq_p(buf);
+ result |= memory_region_dispatch_write(mr, addr1, val, 8,
+ attrs);
+ break;
+ case 4:
+ /* 32 bit write access */
+ val = ldl_p(buf);
+ result |= memory_region_dispatch_write(mr, addr1, val, 4,
+ attrs);
+ break;
+ case 2:
+ /* 16 bit write access */
+ val = lduw_p(buf);
+ result |= memory_region_dispatch_write(mr, addr1, val, 2,
+ attrs);
+ break;
+ case 1:
+ /* 8 bit write access */
+ val = ldub_p(buf);
+ result |= memory_region_dispatch_write(mr, addr1, val, 1,
+ attrs);
+ break;
+ default:
+ abort();
}
} else {
- if (!memory_access_is_direct(mr, is_write)) {
- /* I/O case */
- release_lock |= prepare_mmio_access(mr);
- l = memory_access_size(mr, l, addr1);
- switch (l) {
- case 8:
- /* 64 bit read access */
- result |= memory_region_dispatch_read(mr, addr1, &val, 8,
- attrs);
- stq_p(buf, val);
- break;
- case 4:
- /* 32 bit read access */
- result |= memory_region_dispatch_read(mr, addr1, &val, 4,
- attrs);
- stl_p(buf, val);
- break;
- case 2:
- /* 16 bit read access */
- result |= memory_region_dispatch_read(mr, addr1, &val, 2,
- attrs);
- stw_p(buf, val);
- break;
- case 1:
- /* 8 bit read access */
- result |= memory_region_dispatch_read(mr, addr1, &val, 1,
- attrs);
- stb_p(buf, val);
- break;
- default:
- abort();
- }
- } else {
- /* RAM case */
- ptr = qemu_get_ram_ptr(mr->ram_addr + addr1);
- memcpy(buf, ptr, l);
- }
+ addr1 += memory_region_get_ram_addr(mr);
+ /* RAM case */
+ ptr = qemu_get_ram_ptr(addr1);
+ memcpy(ptr, buf, l);
+ invalidate_and_set_dirty(mr, addr1, l);
}
if (release_lock) {
len -= l;
buf += l;
addr += l;
+
+ if (!len) {
+ break;
+ }
+
+ l = len;
+ mr = address_space_translate(as, addr, &addr1, &l, true);
}
- rcu_read_unlock();
return result;
}
MemTxResult address_space_write(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
const uint8_t *buf, int len)
{
- return address_space_rw(as, addr, attrs, (uint8_t *)buf, len, true);
+ hwaddr l;
+ hwaddr addr1;
+ MemoryRegion *mr;
+ MemTxResult result = MEMTX_OK;
+
+ if (len > 0) {
+ rcu_read_lock();
+ l = len;
+ mr = address_space_translate(as, addr, &addr1, &l, true);
+ result = address_space_write_continue(as, addr, attrs, buf, len,
+ addr1, l, mr);
+ rcu_read_unlock();
+ }
+
+ return result;
}
-MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
- uint8_t *buf, int len)
+/* Called within RCU critical section. */
+MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr,
+ MemTxAttrs attrs, uint8_t *buf,
+ int len, hwaddr addr1, hwaddr l,
+ MemoryRegion *mr)
{
- return address_space_rw(as, addr, attrs, buf, len, false);
+ uint8_t *ptr;
+ uint64_t val;
+ MemTxResult result = MEMTX_OK;
+ bool release_lock = false;
+
+ for (;;) {
+ if (!memory_access_is_direct(mr, false)) {
+ /* I/O case */
+ release_lock |= prepare_mmio_access(mr);
+ l = memory_access_size(mr, l, addr1);
+ switch (l) {
+ case 8:
+ /* 64 bit read access */
+ result |= memory_region_dispatch_read(mr, addr1, &val, 8,
+ attrs);
+ stq_p(buf, val);
+ break;
+ case 4:
+ /* 32 bit read access */
+ result |= memory_region_dispatch_read(mr, addr1, &val, 4,
+ attrs);
+ stl_p(buf, val);
+ break;
+ case 2:
+ /* 16 bit read access */
+ result |= memory_region_dispatch_read(mr, addr1, &val, 2,
+ attrs);
+ stw_p(buf, val);
+ break;
+ case 1:
+ /* 8 bit read access */
+ result |= memory_region_dispatch_read(mr, addr1, &val, 1,
+ attrs);
+ stb_p(buf, val);
+ break;
+ default:
+ abort();
+ }
+ } else {
+ /* RAM case */
+ ptr = qemu_get_ram_ptr(mr->ram_addr + addr1);
+ memcpy(buf, ptr, l);
+ }
+
+ if (release_lock) {
+ qemu_mutex_unlock_iothread();
+ release_lock = false;
+ }
+
+ len -= l;
+ buf += l;
+ addr += l;
+
+ if (!len) {
+ break;
+ }
+
+ l = len;
+ mr = address_space_translate(as, addr, &addr1, &l, false);
+ }
+
+ return result;
+}
+
+MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
+ MemTxAttrs attrs, uint8_t *buf, int len)
+{
+ hwaddr l;
+ hwaddr addr1;
+ MemoryRegion *mr;
+ MemTxResult result = MEMTX_OK;
+
+ if (len > 0) {
+ rcu_read_lock();
+ l = len;
+ mr = address_space_translate(as, addr, &addr1, &l, false);
+ result = address_space_read_continue(as, addr, attrs, buf, len,
+ addr1, l, mr);
+ rcu_read_unlock();
+ }
+
+ return result;
}
+MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
+ uint8_t *buf, int len, bool is_write)
+{
+ if (is_write) {
+ return address_space_write(as, addr, attrs, (uint8_t *)buf, len);
+ } else {
+ return address_space_read(as, addr, attrs, (uint8_t *)buf, len);
+ }
+}
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
int len, int is_write)
hwaddr l, xlat, base;
MemoryRegion *mr, *this_mr;
ram_addr_t raddr;
+ void *ptr;
if (len == 0) {
return NULL;
}
memory_region_ref(mr);
- rcu_read_unlock();
*plen = done;
- return qemu_ram_ptr_length(raddr + base, plen);
+ ptr = qemu_ram_ptr_length(raddr + base, plen);
+ rcu_read_unlock();
+
+ return ptr;
}
/* Unmaps a memory region previously mapped by address_space_map().
target_ulong page;
while (len > 0) {
+ int asidx;
+ MemTxAttrs attrs;
+
page = addr & TARGET_PAGE_MASK;
- phys_addr = cpu_get_phys_page_debug(cpu, page);
+ phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
+ asidx = cpu_asidx_from_attrs(cpu, attrs);
/* if no physical page mapped, return an error */
if (phys_addr == -1)
return -1;
l = len;
phys_addr += (addr & ~TARGET_PAGE_MASK);
if (is_write) {
- cpu_physical_memory_write_rom(cpu->as, phys_addr, buf, l);
+ cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as,
+ phys_addr, buf, l);
} else {
- address_space_rw(cpu->as, phys_addr, MEMTXATTRS_UNSPECIFIED,
+ address_space_rw(cpu->cpu_ases[asidx].as, phys_addr,
+ MEMTXATTRS_UNSPECIFIED,
buf, l, 0);
}
len -= l;
projects / mirror_qemu.git / blobdiff