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target-i386: use memory API to implement SMRAM

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Remove cpu_smm_register and cpu_smm_update.  Instead, each CPU
address space gets an extra region which is an alias of
/machine/smram.  This extra region is enabled or disabled
as the CPU enters/exits SMM.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-03-31 14:12:25 +02:00
parent fe6567d5fd
commit f809c60512
14 changed files with 68 additions and 93 deletions
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33
target-i386/cpu.c
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@ -2751,6 +2751,21 @@ static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
object_property_set_bool(OBJECT(cpu->apic_state), true, "realized",
errp);
}
static void x86_cpu_machine_done(Notifier *n, void *unused)
{
X86CPU *cpu = container_of(n, X86CPU, machine_done);
MemoryRegion *smram =
(MemoryRegion *) object_resolve_path("/machine/smram", NULL);
if (smram) {
cpu->smram = g_new(MemoryRegion, 1);
memory_region_init_alias(cpu->smram, OBJECT(cpu), "smram",
smram, 0, 1ull << 32);
memory_region_set_enabled(cpu->smram, false);
memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->smram, 1);
}
}
#else
static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
{
@ -2815,12 +2830,26 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
#ifndef CONFIG_USER_ONLY
if (tcg_enabled()) {
cpu->cpu_as_mem = g_new(MemoryRegion, 1);
cpu->cpu_as_root = g_new(MemoryRegion, 1);
cs->as = g_new(AddressSpace, 1);
memory_region_init_alias(cpu->cpu_as_root, OBJECT(cpu), "memory",
get_system_memory(), 0, ~0ull);
/* Outer container... */
memory_region_init(cpu->cpu_as_root, OBJECT(cpu), "memory", ~0ull);
memory_region_set_enabled(cpu->cpu_as_root, true);
/* ... with two regions inside: normal system memory with low
* priority, and...
*/
memory_region_init_alias(cpu->cpu_as_mem, OBJECT(cpu), "memory",
get_system_memory(), 0, ~0ull);
memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->cpu_as_mem, 0);
memory_region_set_enabled(cpu->cpu_as_mem, true);
address_space_init(cs->as, cpu->cpu_as_root, "CPU");
/* ... SMRAM with higher priority, linked from /machine/smram. */
cpu->machine_done.notify = x86_cpu_machine_done;
qemu_add_machine_init_done_notifier(&cpu->machine_done);
}
#endif