Nothing like being 10 year late to a party!
Now that userspace can set counter offsets, we can save/restore
the physical timer as well!
Nobody really cared so far, but you're welcome anyway.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/kvm/guest.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 07444fa22888..46e910819de6 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -590,11 +590,16 @@ static unsigned long num_core_regs(const struct kvm_vcpu *vcpu)
return copy_core_reg_indices(vcpu, NULL);
}
-/**
- * ARM64 versions of the TIMER registers, always available on arm64
- */
+static const u64 timer_reg_list[] = {
+ KVM_REG_ARM_TIMER_CTL,
+ KVM_REG_ARM_TIMER_CNT,
+ KVM_REG_ARM_TIMER_CVAL,
+ KVM_REG_ARM_PTIMER_CTL,
+ KVM_REG_ARM_PTIMER_CNT,
+ KVM_REG_ARM_PTIMER_CVAL,
+};
-#define NUM_TIMER_REGS 3
+#define NUM_TIMER_REGS ARRAY_SIZE(timer_reg_list)
static bool is_timer_reg(u64 index)
{
@@ -602,6 +607,9 @@ static bool is_timer_reg(u64 index)
case KVM_REG_ARM_TIMER_CTL:
case KVM_REG_ARM_TIMER_CNT:
case KVM_REG_ARM_TIMER_CVAL:
+ case KVM_REG_ARM_PTIMER_CTL:
+ case KVM_REG_ARM_PTIMER_CNT:
+ case KVM_REG_ARM_PTIMER_CVAL:
return true;
}
return false;
@@ -609,14 +617,11 @@ static bool is_timer_reg(u64 index)
static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
{
- if (put_user(KVM_REG_ARM_TIMER_CTL, uindices))
- return -EFAULT;
- uindices++;
- if (put_user(KVM_REG_ARM_TIMER_CNT, uindices))
- return -EFAULT;
- uindices++;
- if (put_user(KVM_REG_ARM_TIMER_CVAL, uindices))
- return -EFAULT;
+ for (int i = 0; i < NUM_TIMER_REGS; i++) {
+ if (put_user(timer_reg_list[i], uindices))
+ return -EFAULT;
+ uindices++;
+ }
return 0;
}
--
2.34.1
