From: Marc Zyngier <maz@kernel.org>
Date: Thu, 15 Oct 2020 08:24:40 +0000 (+0100)
Subject: KVM: arm64: Remove SPSR manipulation primitives
X-Git-Tag: v5.15~1543^2~225^2~35^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7d76b8a60350ff5e919daacd78ef3c2fe04735a2;p=platform%2Fkernel%2Flinux-starfive.git

KVM: arm64: Remove SPSR manipulation primitives

The SPSR setting code is now completely unused, including that dealing
with banked AArch32 SPSRs. Cleanup time.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index 736a342..5d957d0 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -34,8 +34,6 @@ enum exception_type {
 };
 
 unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
-unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu);
-void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v);
 
 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
 void kvm_skip_instr32(struct kvm_vcpu *vcpu);
@@ -180,30 +178,6 @@ static __always_inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
 		vcpu_gp_regs(vcpu)->regs[reg_num] = val;
 }
 
-static inline unsigned long vcpu_read_spsr(const struct kvm_vcpu *vcpu)
-{
-	if (vcpu_mode_is_32bit(vcpu))
-		return vcpu_read_spsr32(vcpu);
-
-	if (vcpu->arch.sysregs_loaded_on_cpu)
-		return read_sysreg_el1(SYS_SPSR);
-	else
-		return __vcpu_sys_reg(vcpu, SPSR_EL1);
-}
-
-static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
-{
-	if (vcpu_mode_is_32bit(vcpu)) {
-		vcpu_write_spsr32(vcpu, v);
-		return;
-	}
-
-	if (vcpu->arch.sysregs_loaded_on_cpu)
-		write_sysreg_el1(v, SYS_SPSR);
-	else
-		__vcpu_sys_reg(vcpu, SPSR_EL1) = v;
-}
-
 /*
  * The layout of SPSR for an AArch32 state is different when observed from an
  * AArch64 SPSR_ELx or an AArch32 SPSR_*. This function generates the AArch32
diff --git a/arch/arm64/kvm/regmap.c b/arch/arm64/kvm/regmap.c
index accc1d5..ae7e290 100644
--- a/arch/arm64/kvm/regmap.c
+++ b/arch/arm64/kvm/regmap.c
@@ -126,99 +126,3 @@ unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num)
 
 	return reg_array + vcpu_reg_offsets[mode][reg_num];
 }
-
-/*
- * Return the SPSR for the current mode of the virtual CPU.
- */
-static int vcpu_spsr32_mode(const struct kvm_vcpu *vcpu)
-{
-	unsigned long mode = *vcpu_cpsr(vcpu) & PSR_AA32_MODE_MASK;
-	switch (mode) {
-	case PSR_AA32_MODE_SVC: return KVM_SPSR_SVC;
-	case PSR_AA32_MODE_ABT: return KVM_SPSR_ABT;
-	case PSR_AA32_MODE_UND: return KVM_SPSR_UND;
-	case PSR_AA32_MODE_IRQ: return KVM_SPSR_IRQ;
-	case PSR_AA32_MODE_FIQ: return KVM_SPSR_FIQ;
-	default: BUG();
-	}
-}
-
-unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu)
-{
-	int spsr_idx = vcpu_spsr32_mode(vcpu);
-
-	if (!vcpu->arch.sysregs_loaded_on_cpu) {
-		switch (spsr_idx) {
-		case KVM_SPSR_SVC:
-			return __vcpu_sys_reg(vcpu, SPSR_EL1);
-		case KVM_SPSR_ABT:
-			return vcpu->arch.ctxt.spsr_abt;
-		case KVM_SPSR_UND:
-			return vcpu->arch.ctxt.spsr_und;
-		case KVM_SPSR_IRQ:
-			return vcpu->arch.ctxt.spsr_irq;
-		case KVM_SPSR_FIQ:
-			return vcpu->arch.ctxt.spsr_fiq;
-		}
-	}
-
-	switch (spsr_idx) {
-	case KVM_SPSR_SVC:
-		return read_sysreg_el1(SYS_SPSR);
-	case KVM_SPSR_ABT:
-		return read_sysreg(spsr_abt);
-	case KVM_SPSR_UND:
-		return read_sysreg(spsr_und);
-	case KVM_SPSR_IRQ:
-		return read_sysreg(spsr_irq);
-	case KVM_SPSR_FIQ:
-		return read_sysreg(spsr_fiq);
-	default:
-		BUG();
-	}
-}
-
-void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v)
-{
-	int spsr_idx = vcpu_spsr32_mode(vcpu);
-
-	if (!vcpu->arch.sysregs_loaded_on_cpu) {
-		switch (spsr_idx) {
-		case KVM_SPSR_SVC:
-			__vcpu_sys_reg(vcpu, SPSR_EL1) = v;
-			break;
-		case KVM_SPSR_ABT:
-			vcpu->arch.ctxt.spsr_abt = v;
-			break;
-		case KVM_SPSR_UND:
-			vcpu->arch.ctxt.spsr_und = v;
-			break;
-		case KVM_SPSR_IRQ:
-			vcpu->arch.ctxt.spsr_irq = v;
-			break;
-		case KVM_SPSR_FIQ:
-			vcpu->arch.ctxt.spsr_fiq = v;
-			break;
-		}
-
-		return;
-	}
-
-	switch (spsr_idx) {
-	case KVM_SPSR_SVC:
-		write_sysreg_el1(v, SYS_SPSR);
-		break;
-	case KVM_SPSR_ABT:
-		write_sysreg(v, spsr_abt);
-		break;
-	case KVM_SPSR_UND:
-		write_sysreg(v, spsr_und);
-		break;
-	case KVM_SPSR_IRQ:
-		write_sysreg(v, spsr_irq);
-		break;
-	case KVM_SPSR_FIQ:
-		write_sysreg(v, spsr_fiq);
-		break;
-	}
-}