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exec: Simplify the guest physical memory allocation hook

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Make it a generic hook rather than a KVM hook.  Less code and
ifdeffery.

Since the only user of the hook is old S390 KVM, there's hope we can
get rid of it some day.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Message-id: 1375276272-15988-5-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
This commit is contained in:
Markus Armbruster 2013-07-31 15:11:08 +02:00 committed by Anthony Liguori
parent 3435f39513
commit 91138037cb
5 changed files with 21 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
exec.c
View File

@ -749,6 +749,18 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
uint16_t section);
static subpage_t *subpage_init(AddressSpace *as, hwaddr base);
static void *(*phys_mem_alloc)(ram_addr_t size) = qemu_anon_ram_alloc;
/*
* Set a custom physical guest memory alloator.
* Accelerators with unusual needs may need this. Hopefully, we can
* get rid of it eventually.
*/
void phys_mem_set_alloc(void *(*alloc)(ram_addr_t))
{
phys_mem_alloc = alloc;
}
static uint16_t phys_section_add(MemoryRegionSection *section)
{
/* The physical section number is ORed with a page-aligned
@ -1124,12 +1136,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
#endif
}
if (!new_block->host) {
if (kvm_enabled()) {
/* some s390/kvm configurations have special constraints */
new_block->host = kvm_ram_alloc(size);
} else {
new_block->host = qemu_anon_ram_alloc(size);
}
new_block->host = phys_mem_alloc(size);
memory_try_enable_merging(new_block->host, size);
}
}

2
include/exec/exec-all.h
View File

@ -368,6 +368,8 @@ static inline uintptr_t tcg_getra_ext(uintptr_t ra)
#if !defined(CONFIG_USER_ONLY)
void phys_mem_set_alloc(void *(*alloc)(ram_addr_t));
struct MemoryRegion *iotlb_to_region(hwaddr index);
bool io_mem_read(struct MemoryRegion *mr, hwaddr addr,
uint64_t *pvalue, unsigned size);

5
include/sysemu/kvm.h
View File

@ -161,11 +161,6 @@ int kvm_cpu_exec(CPUState *cpu);
#ifdef NEED_CPU_H
#if !defined(CONFIG_USER_ONLY)
void *kvm_ram_alloc(ram_addr_t size);
void *kvm_arch_ram_alloc(ram_addr_t size);
#endif
void kvm_setup_guest_memory(void *start, size_t size);
void kvm_flush_coalesced_mmio_buffer(void);

13
kvm-all.c
View File

@ -1812,19 +1812,6 @@ int kvm_has_intx_set_mask(void)
return kvm_state->intx_set_mask;
}
void *kvm_ram_alloc(ram_addr_t size)
{
#ifdef TARGET_S390X
void *mem;
mem = kvm_arch_ram_alloc(size);
if (mem) {
return mem;
}
#endif
return qemu_anon_ram_alloc(size);
}
void kvm_setup_guest_memory(void *start, size_t size)
{
#ifdef CONFIG_VALGRIND_H

17
target-s390x/kvm.c
View File

@ -93,9 +93,15 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
static int cap_sync_regs;
static void *legacy_s390_alloc(ram_addr_t size);
int kvm_arch_init(KVMState *s)
{
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
|| !kvm_check_extension(s, KVM_CAP_S390_COW)) {
phys_mem_set_alloc(legacy_s390_alloc);
}
return 0;
}
@ -333,17 +339,6 @@ static void *legacy_s390_alloc(ram_addr_t size)
return mem;
}
void *kvm_arch_ram_alloc(ram_addr_t size)
{
/* Can we use the standard allocation ? */
if (kvm_check_extension(kvm_state, KVM_CAP_S390_GMAP) &&
kvm_check_extension(kvm_state, KVM_CAP_S390_COW)) {
return NULL;
} else {
return legacy_s390_alloc(size);
}
}
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
{
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};