[Qemu-devel] [patch 5/8] Export qemu_ram_addr_from_host

[Marcelo Tosatti <mtosatti@redhat.com>]

[-- Attachment #1: do_qemu_ram_addr_from_host --]
[-- Type: text/plain, Size: 3269 bytes --]

To be used by next patches.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: qemu/cpu-common.h
===================================================================
--- qemu.orig/cpu-common.h
+++ qemu/cpu-common.h
@@ -47,7 +47,8 @@ void qemu_ram_free(ram_addr_t addr);
 /* This should only be used for ram local to a device.  */
 void *qemu_get_ram_ptr(ram_addr_t addr);
 /* This should not be used by devices.  */
-ram_addr_t qemu_ram_addr_from_host(void *ptr);
+int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr);
+ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr);
 
 int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read,
                            CPUWriteMemoryFunc * const *mem_write,
Index: qemu/exec.c
===================================================================
--- qemu.orig/exec.c
+++ qemu/exec.c
@@ -2086,7 +2086,7 @@ static inline void tlb_update_dirty(CPUT
     if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
         p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK)
             + tlb_entry->addend);
-        ram_addr = qemu_ram_addr_from_host(p);
+        ram_addr = qemu_ram_addr_from_host_nofail(p);
         if (!cpu_physical_memory_is_dirty(ram_addr)) {
             tlb_entry->addr_write |= TLB_NOTDIRTY;
         }
@@ -2938,23 +2938,31 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
     return NULL;
 }
 
-/* Some of the softmmu routines need to translate from a host pointer
-   (typically a TLB entry) back to a ram offset.  */
-ram_addr_t qemu_ram_addr_from_host(void *ptr)
+int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
 {
     RAMBlock *block;
     uint8_t *host = ptr;
 
     QLIST_FOREACH(block, &ram_list.blocks, next) {
         if (host - block->host < block->length) {
-            return block->offset + (host - block->host);
+            *ram_addr = block->offset + (host - block->host);
+            return 0;
         }
     }
+    return -1;
+}
 
-    fprintf(stderr, "Bad ram pointer %p\n", ptr);
-    abort();
+/* Some of the softmmu routines need to translate from a host pointer
+   (typically a TLB entry) back to a ram offset.  */
+ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr)
+{
+    ram_addr_t ram_addr;
 
-    return 0;
+    if (qemu_ram_addr_from_host(ptr, &ram_addr)) {
+        fprintf(stderr, "Bad ram pointer %p\n", ptr);
+        abort();
+    }
+    return ram_addr;
 }
 
 static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
@@ -3703,7 +3711,7 @@ void cpu_physical_memory_unmap(void *buf
 {
     if (buffer != bounce.buffer) {
         if (is_write) {
-            ram_addr_t addr1 = qemu_ram_addr_from_host(buffer);
+            ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer);
             while (access_len) {
                 unsigned l;
                 l = TARGET_PAGE_SIZE;
Index: qemu/exec-all.h
===================================================================
--- qemu.orig/exec-all.h
+++ qemu/exec-all.h
@@ -334,7 +334,7 @@ static inline tb_page_addr_t get_page_ad
     }
     p = (void *)(unsigned long)addr
         + env1->tlb_table[mmu_idx][page_index].addend;
-    return qemu_ram_addr_from_host(p);
+    return qemu_ram_addr_from_host_nofail(p);
 }
 #endif