KVM: arm64: Move CNT*_CVAL_EL0 userspace accessors to generic infrastructure

As for the control registers, move the comparator registers to
the common infrastructure.

Signed-off-by: Marc Zyngier <maz@kernel.org>

Author: Marc Zyngier

arch/arm64/kvm/guest.c

@@ -593,9 +593,7 @@ static unsigned long num_core_regs(const struct kvm_vcpu *vcpu)
 
 static const u64 timer_reg_list[] = {
 	KVM_REG_ARM_TIMER_CNT,
-	KVM_REG_ARM_TIMER_CVAL,
 	KVM_REG_ARM_PTIMER_CNT,
-	KVM_REG_ARM_PTIMER_CVAL,
 };
 
 #define NUM_TIMER_REGS ARRAY_SIZE(timer_reg_list)
@@ -604,9 +602,7 @@ static bool is_timer_reg(u64 index)
 {
 	switch (index) {
 	case KVM_REG_ARM_TIMER_CNT:
-	case KVM_REG_ARM_TIMER_CVAL:
 	case KVM_REG_ARM_PTIMER_CNT:
-	case KVM_REG_ARM_PTIMER_CVAL:
 		return true;
 	}
 	return false;

arch/arm64/kvm/sys_regs.c

@@ -3512,11 +3512,11 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_CNTVCTSS_EL0), access_arch_timer },
 	{ SYS_DESC(SYS_CNTP_TVAL_EL0), access_arch_timer },
 	TIMER_REG(CNTP_CTL_EL0, NULL),
-	{ SYS_DESC(SYS_CNTP_CVAL_EL0), access_arch_timer },
+	TIMER_REG(CNTP_CVAL_EL0, NULL),
 
 	{ SYS_DESC(SYS_CNTV_TVAL_EL0), access_arch_timer },
 	TIMER_REG(CNTV_CTL_EL0, NULL),
-	{ SYS_DESC(SYS_CNTV_CVAL_EL0), access_arch_timer },
+	TIMER_REG(CNTV_CVAL_EL0, NULL),
 
 	/* PMEVCNTRn_EL0 */
 	PMU_PMEVCNTR_EL0(0),
@@ -3715,11 +3715,11 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	EL2_REG(CNTHCTL_EL2, access_rw, reset_val, 0),
 	{ SYS_DESC(SYS_CNTHP_TVAL_EL2), access_arch_timer },
 	TIMER_REG(CNTHP_CTL_EL2, el2_visibility),
-	EL2_REG(CNTHP_CVAL_EL2, access_arch_timer, reset_val, 0),
+	TIMER_REG(CNTHP_CVAL_EL2, el2_visibility),
 
 	{ SYS_DESC(SYS_CNTHV_TVAL_EL2), access_arch_timer, .visibility = cnthv_visibility },
 	TIMER_REG(CNTHV_CTL_EL2, cnthv_visibility),
-	EL2_REG_FILTERED(CNTHV_CVAL_EL2, access_arch_timer, reset_val, 0, cnthv_visibility),
+	TIMER_REG(CNTHV_CVAL_EL2, cnthv_visibility),
 
 	{ SYS_DESC(SYS_CNTKCTL_EL12), access_cntkctl_el12 },