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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>
This commit is contained in:
Marc Zyngier 2020-10-15 09:24:40 +01:00
Родитель 41613b519c
Коммит 7d76b8a603
2 изменённых файлов: 0 добавлений и 122 удалений
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26
arch/arm64/include/asm/kvm_emulate.h
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@ -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

96
arch/arm64/kvm/regmap.c
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@ -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;
}
}