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KVM: Provide unlocked version of emulator_write_phys()

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Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2008-03-02 14:06:05 +02:00
parent 0cf1bfd273
commit 9f81128591
2 changed files with 18 additions and 8 deletions
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23
arch/x86/kvm/x86.c
View File

@ -1840,20 +1840,27 @@ mmio:
return X86EMUL_UNHANDLEABLE;
}
int __emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
const void *val, int bytes)
{
int ret;
ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
if (ret < 0)
return 0;
kvm_mmu_pte_write(vcpu, gpa, val, bytes);
return 1;
}
static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
const void *val, int bytes)
const void *val, int bytes)
{
int ret;
down_read(&vcpu->kvm->slots_lock);
ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
if (ret < 0) {
up_read(&vcpu->kvm->slots_lock);
return 0;
}
kvm_mmu_pte_write(vcpu, gpa, val, bytes);
ret =__emulator_write_phys(vcpu, gpa, val, bytes);
up_read(&vcpu->kvm->slots_lock);
return 1;
return ret;
}
static int emulator_write_emulated_onepage(unsigned long addr,

3
include/asm-x86/kvm_host.h
View File

@ -432,6 +432,9 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
int __emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
const void *val, int bytes);
enum emulation_result {
EMULATE_DONE, /* no further processing */
EMULATE_DO_MMIO, /* kvm_run filled with mmio request */