summaryrefslogtreecommitdiff
path: root/exec.c
diff options
context:
space:
mode:
Diffstat (limited to 'exec.c')
-rw-r--r--exec.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/exec.c b/exec.c
index 9823e355f7..0c773a8ad9 100644
--- a/exec.c
+++ b/exec.c
@@ -1743,8 +1743,14 @@ static int cpu_notify_migration_log(int enable)
return 0;
}
+/* The l1_phys_map provides the upper P_L1_BITs of the guest physical
+ * address. Each intermediate table provides the next L2_BITs of guest
+ * physical address space. The number of levels vary based on host and
+ * guest configuration, making it efficient to build the final guest
+ * physical address by seeding the L1 offset and shifting and adding in
+ * each L2 offset as we recurse through them. */
static void phys_page_for_each_1(CPUPhysMemoryClient *client,
- int level, void **lp)
+ int level, void **lp, target_phys_addr_t addr)
{
int i;
@@ -1753,16 +1759,18 @@ static void phys_page_for_each_1(CPUPhysMemoryClient *client,
}
if (level == 0) {
PhysPageDesc *pd = *lp;
+ addr <<= L2_BITS + TARGET_PAGE_BITS;
for (i = 0; i < L2_SIZE; ++i) {
if (pd[i].phys_offset != IO_MEM_UNASSIGNED) {
- client->set_memory(client, pd[i].region_offset,
+ client->set_memory(client, addr | i << TARGET_PAGE_BITS,
TARGET_PAGE_SIZE, pd[i].phys_offset, false);
}
}
} else {
void **pp = *lp;
for (i = 0; i < L2_SIZE; ++i) {
- phys_page_for_each_1(client, level - 1, pp + i);
+ phys_page_for_each_1(client, level - 1, pp + i,
+ (addr << L2_BITS) | i);
}
}
}
@@ -1772,7 +1780,7 @@ static void phys_page_for_each(CPUPhysMemoryClient *client)
int i;
for (i = 0; i < P_L1_SIZE; ++i) {
phys_page_for_each_1(client, P_L1_SHIFT / L2_BITS - 1,
- l1_phys_map + i);
+ l1_phys_map + i, i);
}
}