From 539aee0edb9fdc8f465e3843c261acc88c47d8ee Mon Sep 17 00:00:00 2001 From: James Morse Date: Thu, 19 Jul 2018 16:24:24 +0100 Subject: [PATCH] KVM: arm64: Share the parts of get/set events useful to 32bit The get/set events helpers to do some work to check reserved and padding fields are zero. This is useful on 32bit too. Move this code into virt/kvm/arm/arm.c, and give the arch code some underscores. This is temporarily hidden behind __KVM_HAVE_VCPU_EVENTS until 32bit is wired up. Signed-off-by: James Morse Reviewed-by: Dongjiu Geng Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 8 ++++---- arch/arm64/kvm/guest.c | 21 ++++----------------- virt/kvm/arm/arm.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 36 insertions(+), 21 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index bc244cc6e451..f26055f2306e 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -350,11 +350,11 @@ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); -int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, - struct kvm_vcpu_events *events); +int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); -int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, - struct kvm_vcpu_events *events); +int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index dd05be96d981..725c7545e91a 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -289,11 +289,9 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, return -EINVAL; } -int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, - struct kvm_vcpu_events *events) +int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) { - memset(events, 0, sizeof(*events)); - events->exception.serror_pending = !!(vcpu->arch.hcr_el2 & HCR_VSE); events->exception.serror_has_esr = cpus_have_const_cap(ARM64_HAS_RAS_EXTN); @@ -303,23 +301,12 @@ int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, return 0; } -int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, - struct kvm_vcpu_events *events) +int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) { - int i; bool serror_pending = events->exception.serror_pending; bool has_esr = events->exception.serror_has_esr; - /* check whether the reserved field is zero */ - for (i = 0; i < ARRAY_SIZE(events->reserved); i++) - if (events->reserved[i]) - return -EINVAL; - - /* check whether the pad field is zero */ - for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++) - if (events->exception.pad[i]) - return -EINVAL; - if (serror_pending && has_esr) { if (!cpus_have_const_cap(ARM64_HAS_RAS_EXTN)) return -EINVAL; diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 1c72247aeb1d..14f8fad1c7ae 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -1050,6 +1050,34 @@ static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu, return ret; } +#ifdef __KVM_HAVE_VCPU_EVENTS /* temporary: until 32bit is wired up */ +static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + memset(events, 0, sizeof(*events)); + + return __kvm_arm_vcpu_get_events(vcpu, events); +} + +static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + int i; + + /* check whether the reserved field is zero */ + for (i = 0; i < ARRAY_SIZE(events->reserved); i++) + if (events->reserved[i]) + return -EINVAL; + + /* check whether the pad field is zero */ + for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++) + if (events->exception.pad[i]) + return -EINVAL; + + return __kvm_arm_vcpu_set_events(vcpu, events); +} +#endif /* __KVM_HAVE_VCPU_EVENTS */ + long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) {