From 9f81128591ca1e9907f2e7a7b195e33232167d60 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 2 Mar 2008 14:06:05 +0200 Subject: [PATCH] KVM: Provide unlocked version of emulator_write_phys() Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 21 ++++++++++++++------- include/asm-x86/kvm_host.h | 3 +++ 2 files changed, 17 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1b9e695cc64..03ba402c476 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 26a313a0947..99d31f5ed9f 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 */ -- 2.41.1