From: Shannon Zhao <redacted>

Since the reset value of PMINTENSET and PMINTENCLR is UNKNOWN, use
reset_unknown for its reset handler. Add a handler to emulate writing
PMINTENSET or PMINTENCLR register.

Signed-off-by: Shannon Zhao <redacted>
---
 arch/arm64/kvm/sys_regs.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 3416881..24ce4fe 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c

@@ -644,6 +644,25 @@ static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
 	return true;
 }
 
+static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
+			   const struct sys_reg_desc *r)
+{
+	u64 mask = kvm_pmu_valid_counter_mask(vcpu);
+
+	if (p->is_write) {
+		if (r->Op2 & 0x1)
+			/* accessing PMINTENSET_EL1 */
+			vcpu_sys_reg(vcpu, r->reg) |= (p->regval & mask);
+		else
+			/* accessing PMINTENCLR_EL1 */
+			vcpu_sys_reg(vcpu, r->reg) &= ~(p->regval & mask);
+	} else {
+		p->regval = vcpu_sys_reg(vcpu, r->reg) & mask;
+	}
+
+	return true;
+}
+