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authorAvi Kivity <avi@qumranet.com>2008-03-02 14:06:05 +0200
committerAvi Kivity <avi@qumranet.com>2008-04-27 12:00:26 +0300
commit9f81128591ca1e9907f2e7a7b195e33232167d60 (patch)
tree2abca5f4181f3bc0570bab60d85b473a595f1285
parent0cf1bfd2737f41e59f974a61eab11af206d2042a (diff)
KVM: Provide unlocked version of emulator_write_phys()
Signed-off-by: Avi Kivity <avi@qumranet.com>
-rw-r--r--arch/x86/kvm/x86.c21
-rw-r--r--include/asm-x86/kvm_host.h3
2 files changed, 17 insertions, 7 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1b9e695cc641..03ba402c476a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1840,22 +1840,29 @@ mmio:
return X86EMUL_UNHANDLEABLE;
}
-static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
- const void *val, int bytes)
+int __emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
+ 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);
+ if (ret < 0)
return 0;
- }
kvm_mmu_pte_write(vcpu, gpa, val, bytes);
- up_read(&vcpu->kvm->slots_lock);
return 1;
}
+static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
+ const void *val, int bytes)
+{
+ int ret;
+
+ down_read(&vcpu->kvm->slots_lock);
+ ret =__emulator_write_phys(vcpu, gpa, val, bytes);
+ up_read(&vcpu->kvm->slots_lock);
+ return ret;
+}
+
static int emulator_write_emulated_onepage(unsigned long addr,
const void *val,
unsigned int bytes,
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 26a313a09472..99d31f5ed9ff 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -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 */