@@ -101,6 +101,7 @@ struct KVMState
QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
bool direct_msi;
#endif
+ bool readonly_mem;
};
KVMState *kvm_state;
@@ -265,9 +266,16 @@ err:
* dirty pages logging control
*/
-static int kvm_mem_flags(KVMState *s, bool log_dirty)
+static int kvm_mem_flags(KVMState *s, MemoryRegion *mr)
{
- return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0;
+ int flags;
+
+ flags = memory_region_is_logging(mr) ? KVM_MEM_LOG_DIRTY_PAGES : 0;
+
+ if (s->readonly_mem && mr->readonly) {
+ flags |= KVM_MEM_READONLY;
+ }
+ return flags;
}
static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty)
@@ -278,7 +286,7 @@ static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty)
old_flags = mem->flags;
- flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty);
+ flags = (mem->flags & ~mask) | (log_dirty ? mask : 0);
mem->flags = flags;
/* If nothing changed effectively, no need to issue ioctl */
@@ -626,7 +634,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
mem->memory_size = old.memory_size;
mem->start_addr = old.start_addr;
mem->ram = old.ram;
- mem->flags = kvm_mem_flags(s, log_dirty);
+ mem->flags = kvm_mem_flags(s, mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@@ -647,7 +655,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
mem->memory_size = start_addr - old.start_addr;
mem->start_addr = old.start_addr;
mem->ram = old.ram;
- mem->flags = kvm_mem_flags(s, log_dirty);
+ mem->flags = kvm_mem_flags(s, mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@@ -671,7 +679,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
size_delta = mem->start_addr - old.start_addr;
mem->memory_size = old.memory_size - size_delta;
mem->ram = old.ram + size_delta;
- mem->flags = kvm_mem_flags(s, log_dirty);
+ mem->flags = kvm_mem_flags(s, mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@@ -693,7 +701,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
mem->memory_size = size;
mem->start_addr = start_addr;
mem->ram = ram;
- mem->flags = kvm_mem_flags(s, log_dirty);
+ mem->flags = kvm_mem_flags(s, mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@@ -1390,6 +1398,8 @@ int kvm_init(void)
s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
}
+ s->readonly_mem = kvm_check_extension(s, KVM_CAP_READONLY_MEM);
+
ret = kvm_arch_init(s);
if (ret < 0) {
goto err;
As readonly memory is support in kvm, this patch supports this feature in qemu, mainly pluging the memory region with KVM_MEM_READONLY flag to kvm Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> --- kvm-all.c | 24 +++++++++++++++++------- 1 files changed, 17 insertions(+), 7 deletions(-)