[PATCH v3 12/20] KVM: ARM64: Add reset and access handlers for PMINTENSET and PMINTENCLR register

[Shannon Zhao]

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

Signed-off-by: Shannon Zhao <shannon.zhao at linaro.org>
---
 arch/arm64/kvm/sys_regs.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 98da5a2..e52325c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -519,6 +519,18 @@ static bool access_pmu_regs(struct kvm_vcpu *vcpu,
 			vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val;
 			break;
 		}
+		case PMINTENSET_EL1: {
+			val = *vcpu_reg(vcpu, p->Rt);
+			vcpu_sys_reg(vcpu, r->reg) |= val;
+			vcpu_sys_reg(vcpu, PMINTENCLR_EL1) |= val;
+			break;
+		}
+		case PMINTENCLR_EL1: {
+			val = *vcpu_reg(vcpu, p->Rt);
+			vcpu_sys_reg(vcpu, r->reg) &= ~val;
+			vcpu_sys_reg(vcpu, PMINTENSET_EL1) &= ~val;
+			break;
+		}
 		case PMCR_EL0: {
 			/* Only update writeable bits of PMCR */
 			val = vcpu_sys_reg(vcpu, r->reg);
@@ -708,10 +720,10 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 
 	/* PMINTENSET_EL1 */
 	{ Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b001),
-	  trap_raz_wi },
+	  access_pmu_regs, reset_unknown, PMINTENSET_EL1 },
 	/* PMINTENCLR_EL1 */
 	{ Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b010),
-	  trap_raz_wi },
+	  access_pmu_regs, reset_unknown, PMINTENCLR_EL1 },
 
 	/* MAIR_EL1 */
 	{ Op0(0b11), Op1(0b000), CRn(0b1010), CRm(0b0010), Op2(0b000),
@@ -1022,6 +1034,18 @@ static bool access_pmu_cp15_regs(struct kvm_vcpu *vcpu,
 			vcpu_cp15(vcpu, c9_PMCNTENSET) &= ~val;
 			break;
 		}
+		case c9_PMINTENSET: {
+			val = *vcpu_reg(vcpu, p->Rt);
+			vcpu_cp15(vcpu, r->reg) |= val;
+			vcpu_cp15(vcpu, c9_PMINTENCLR) |= val;
+			break;
+		}
+		case c9_PMINTENCLR: {
+			val = *vcpu_reg(vcpu, p->Rt);
+			vcpu_cp15(vcpu, r->reg) &= ~val;
+			vcpu_cp15(vcpu, c9_PMINTENSET) &= ~val;
+			break;
+		}
 		case c9_PMCR: {
 			/* Only update writeable bits of PMCR */
 			val = vcpu_cp15(vcpu, r->reg);
@@ -1108,8 +1132,10 @@ static const struct sys_reg_desc cp15_regs[] = {
 	{ Op1( 0), CRn( 9), CRm(13), Op2( 2), access_pmu_cp15_regs,
 	  reset_unknown_cp15, c9_PMXEVCNTR },
 	{ Op1( 0), CRn( 9), CRm(14), Op2( 0), trap_raz_wi },
-	{ Op1( 0), CRn( 9), CRm(14), Op2( 1), trap_raz_wi },
-	{ Op1( 0), CRn( 9), CRm(14), Op2( 2), trap_raz_wi },
+	{ Op1( 0), CRn( 9), CRm(14), Op2( 1), access_pmu_cp15_regs,
+	  reset_unknown_cp15, c9_PMINTENSET },
+	{ Op1( 0), CRn( 9), CRm(14), Op2( 2), access_pmu_cp15_regs,
+	  reset_unknown_cp15, c9_PMINTENCLR },
 
 	{ Op1( 0), CRn(10), CRm( 2), Op2( 0), access_vm_reg, NULL, c10_PRRR },
 	{ Op1( 0), CRn(10), CRm( 2), Op2( 1), access_vm_reg, NULL, c10_NMRR },
-- 
2.1.4