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kvm-all: put kvm_mem_flags to more work 

Currently kvm_mem_flags just translates bools to bits, let's
make it also determine the bools first. This avoids its parameter
list growing each time we add a flag.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrew Jones 2015-06-18 18:28:43 +02:00 committed by Paolo Bonzini
parent fc12d72e10
commit d6ff5cbc12
1 changed files with 20 additions and 22 deletions
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42
kvm-all.c
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@ -291,45 +291,47 @@ err:
* dirty pages logging control
*/
static int kvm_mem_flags(KVMState *s, bool log_dirty, bool readonly)
static int kvm_mem_flags(MemoryRegion *mr)
{
bool readonly = mr->readonly || memory_region_is_romd(mr);
int flags = 0;
flags = log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0;
if (memory_region_get_dirty_log_mask(mr) != 0) {
flags |= KVM_MEM_LOG_DIRTY_PAGES;
}
if (readonly && kvm_readonly_mem_allowed) {
flags |= KVM_MEM_READONLY;
}
return flags;
}
static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty)
static int kvm_slot_update_flags(KVMSlot *mem, MemoryRegion *mr)
{
KVMState *s = kvm_state;
int flags, mask = KVM_MEM_LOG_DIRTY_PAGES;
int old_flags;
old_flags = mem->flags;
flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty, false);
mem->flags = flags;
mem->flags = kvm_mem_flags(mr);
/* If nothing changed effectively, no need to issue ioctl */
if (flags == old_flags) {
if (mem->flags == old_flags) {
return 0;
}
return kvm_set_user_memory_region(s, mem);
}
static int kvm_dirty_pages_log_change(hwaddr phys_addr,
ram_addr_t size, bool log_dirty)
static int kvm_section_update_flags(MemoryRegionSection *section)
{
KVMState *s = kvm_state;
hwaddr phys_addr = section->offset_within_address_space;
ram_addr_t size = int128_get64(section->size);
KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size);
if (mem == NULL) {
return 0;
} else {
return kvm_slot_dirty_pages_log_change(mem, log_dirty);
return kvm_slot_update_flags(mem, section->mr);
}
}
@ -343,8 +345,7 @@ static void kvm_log_start(MemoryListener *listener,
return;
}
r = kvm_dirty_pages_log_change(section->offset_within_address_space,
int128_get64(section->size), true);
r = kvm_section_update_flags(section);
if (r < 0) {
abort();
}
@ -360,8 +361,7 @@ static void kvm_log_stop(MemoryListener *listener,
return;
}
r = kvm_dirty_pages_log_change(section->offset_within_address_space,
int128_get64(section->size), false);
r = kvm_section_update_flags(section);
if (r < 0) {
abort();
}
@ -638,9 +638,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
KVMSlot *mem, old;
int err;
MemoryRegion *mr = section->mr;
bool log_dirty = memory_region_get_dirty_log_mask(mr) != 0;
bool writeable = !mr->readonly && !mr->rom_device;
bool readonly_flag = mr->readonly || memory_region_is_romd(mr);
hwaddr start_addr = section->offset_within_address_space;
ram_addr_t size = int128_get64(section->size);
void *ram = NULL;
@ -684,7 +682,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
(ram - start_addr == mem->ram - mem->start_addr)) {
/* The new slot fits into the existing one and comes with
* identical parameters - update flags and done. */
kvm_slot_dirty_pages_log_change(mem, log_dirty);
kvm_slot_update_flags(mem, mr);
return;
}
@ -717,7 +715,7 @@ 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, readonly_flag);
mem->flags = kvm_mem_flags(mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@ -738,7 +736,7 @@ 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, readonly_flag);
mem->flags = kvm_mem_flags(mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@ -762,7 +760,7 @@ 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, readonly_flag);
mem->flags = kvm_mem_flags(mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {
@ -784,7 +782,7 @@ 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, readonly_flag);
mem->flags = kvm_mem_flags(mr);
err = kvm_set_user_memory_region(s, mem);
if (err) {