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KVM: arm64: Share the parts of get/set events useful to 32bit

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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 <james.morse@arm.com>
Reviewed-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
James Morse 2018-07-19 16:24:24 +01:00 committed by Marc Zyngier
parent be26b3a734
commit 539aee0edb
3 changed files with 36 additions and 21 deletions
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8
arch/arm64/include/asm/kvm_host.h
View File

@ -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);

21
arch/arm64/kvm/guest.c
View File

@ -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;

28
virt/kvm/arm/arm.c
View File

@ -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)
{