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target/i386: use multiple CPU AddressSpaces 

This speeds up SMM switches.  Later on it may remove the need to take
the BQL, and it may also allow to reuse code between TCG and KVM.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-03-01 10:34:48 +01:00
parent c8bc83a4dd
commit f8c45c6550
5 changed files with 47 additions and 55 deletions
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15
target/i386/cpu.c
View File

@ -3239,7 +3239,7 @@ static void x86_cpu_machine_done(Notifier *n, void *unused)
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_set_enabled(cpu->smram, true);
memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->smram, 1);
}
}
@ -3619,7 +3619,9 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
#ifndef CONFIG_USER_ONLY
if (tcg_enabled()) {
AddressSpace *newas = g_new(AddressSpace, 1);
AddressSpace *as_normal = address_space_init_shareable(cs->memory,
"cpu-memory");
AddressSpace *as_smm = g_new(AddressSpace, 1);
cpu->cpu_as_mem = g_new(MemoryRegion, 1);
cpu->cpu_as_root = g_new(MemoryRegion, 1);
@ -3635,9 +3637,11 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
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(newas, cpu->cpu_as_root, "CPU");
cs->num_ases = 1;
cpu_address_space_init(cs, newas, 0);
address_space_init(as_smm, cpu->cpu_as_root, "CPU");
cs->num_ases = 2;
cpu_address_space_init(cs, as_normal, 0);
cpu_address_space_init(cs, as_smm, 1);
/* ... SMRAM with higher priority, linked from /machine/smram. */
cpu->machine_done.notify = x86_cpu_machine_done;
@ -4053,6 +4057,7 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = x86_cpu_handle_mmu_fault;
#else
cc->asidx_from_attrs = x86_asidx_from_attrs;
cc->get_memory_mapping = x86_cpu_get_memory_mapping;
cc->get_phys_page_debug = x86_cpu_get_phys_page_debug;
cc->write_elf64_note = x86_cpu_write_elf64_note;

11
target/i386/cpu.h
View File

@ -1451,6 +1451,16 @@ int x86_cpu_handle_mmu_fault(CPUState *cpu, vaddr addr,
void x86_cpu_set_a20(X86CPU *cpu, int a20_state);
#ifndef CONFIG_USER_ONLY
static inline int x86_asidx_from_attrs(CPUState *cs, MemTxAttrs attrs)
{
return !!attrs.secure;
}
static inline AddressSpace *cpu_addressspace(CPUState *cs, MemTxAttrs attrs)
{
return cpu_get_address_space(cs, cpu_asidx_from_attrs(cs, attrs));
}
uint8_t x86_ldub_phys(CPUState *cs, hwaddr addr);
uint32_t x86_lduw_phys(CPUState *cs, hwaddr addr);
uint32_t x86_ldl_phys(CPUState *cs, hwaddr addr);
@ -1653,7 +1663,6 @@ void do_interrupt_x86_hardirq(CPUX86State *env, int intno, int is_hw);
/* smm_helper.c */
void do_smm_enter(X86CPU *cpu);
void cpu_smm_update(X86CPU *cpu);
/* apic.c */
void cpu_report_tpr_access(CPUX86State *env, TPRAccess access);

54
target/i386/helper.c
View File

@ -1403,89 +1403,89 @@ uint8_t x86_ldub_phys(CPUState *cs, hwaddr addr)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
return address_space_ldub(cs->as, addr,
cpu_get_mem_attrs(env),
NULL);
return address_space_ldub(as, addr, attrs, NULL);
}
uint32_t x86_lduw_phys(CPUState *cs, hwaddr addr)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
return address_space_lduw(cs->as, addr,
cpu_get_mem_attrs(env),
NULL);
return address_space_lduw(as, addr, attrs, NULL);
}
uint32_t x86_ldl_phys(CPUState *cs, hwaddr addr)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
return address_space_ldl(cs->as, addr,
cpu_get_mem_attrs(env),
NULL);
return address_space_ldl(as, addr, attrs, NULL);
}
uint64_t x86_ldq_phys(CPUState *cs, hwaddr addr)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
return address_space_ldq(cs->as, addr,
cpu_get_mem_attrs(env),
NULL);
return address_space_ldq(as, addr, attrs, NULL);
}
void x86_stb_phys(CPUState *cs, hwaddr addr, uint8_t val)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
address_space_stb(cs->as, addr, val,
cpu_get_mem_attrs(env),
NULL);
address_space_stb(as, addr, val, attrs, NULL);
}
void x86_stl_phys_notdirty(CPUState *cs, hwaddr addr, uint32_t val)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
address_space_stl_notdirty(cs->as, addr, val,
cpu_get_mem_attrs(env),
NULL);
address_space_stl_notdirty(as, addr, val, attrs, NULL);
}
void x86_stw_phys(CPUState *cs, hwaddr addr, uint32_t val)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
address_space_stw(cs->as, addr, val,
cpu_get_mem_attrs(env),
NULL);
address_space_stw(as, addr, val, attrs, NULL);
}
void x86_stl_phys(CPUState *cs, hwaddr addr, uint32_t val)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
address_space_stl(cs->as, addr, val,
cpu_get_mem_attrs(env),
NULL);
address_space_stl(as, addr, val, attrs, NULL);
}
void x86_stq_phys(CPUState *cs, hwaddr addr, uint64_t val)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
MemTxAttrs attrs = cpu_get_mem_attrs(env);
AddressSpace *as = cpu_addressspace(cs, attrs);
address_space_stq(cs->as, addr, val,
cpu_get_mem_attrs(env),
NULL);
address_space_stq(as, addr, val, attrs, NULL);
}
#endif

4
target/i386/machine.c
View File

@ -274,10 +274,6 @@ static int cpu_post_load(void *opaque, int version_id)
cpu_x86_update_dr7(env, dr7);
}
tlb_flush(cs);
if (tcg_enabled()) {
cpu_smm_update(cpu);
}
return 0;
}

18
target/i386/smm_helper.c
View File

@ -43,19 +43,6 @@ void helper_rsm(CPUX86State *env)
#define SMM_REVISION_ID 0x00020000
#endif
/* Called with iothread lock taken */
void cpu_smm_update(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
bool smm_enabled = (env->hflags & HF_SMM_MASK);
g_assert(qemu_mutex_iothread_locked());
if (cpu->smram) {
memory_region_set_enabled(cpu->smram, smm_enabled);
}
}
void do_smm_enter(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
@ -73,7 +60,6 @@ void do_smm_enter(X86CPU *cpu)
} else {
env->hflags2 |= HF2_NMI_MASK;
}
cpu_smm_update(cpu);
sm_state = env->smbase + 0x8000;
@ -338,10 +324,6 @@ void helper_rsm(CPUX86State *env)
env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK;
env->hflags &= ~HF_SMM_MASK;
qemu_mutex_lock_iothread();
cpu_smm_update(cpu);
qemu_mutex_unlock_iothread();
qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");
log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
}