As we're about to move SPSR_EL1 into the VNCR page, we need to
disassociate it from the rest of the 32bit cruft. Let's break
the array into individual fields.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/include/asm/kvm_emulate.h | 4 ++--
arch/arm64/include/asm/kvm_host.h | 6 ++++-
arch/arm64/kvm/guest.c | 19 +++++++++++----
arch/arm64/kvm/hyp/sysreg-sr.c | 26 ++++++++++-----------
arch/arm64/kvm/regmap.c | 35 +++++++++++++++++++++++++---
arch/arm64/kvm/sys_regs.c | 4 ++--
6 files changed, 67 insertions(+), 27 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index 5718fbc56ba5..eed8bd48e60c 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -327,7 +327,7 @@ static inline unsigned long vcpu_read_spsr(const struct kvm_vcpu *vcpu)
if (vcpu->arch.sysregs_loaded_on_cpu)
return read_sysreg_el1(SYS_SPSR);
else
- return vcpu->arch.ctxt.spsr[KVM_SPSR_EL1];
+ return vcpu->arch.ctxt.spsr_el1;
}
static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
@@ -345,7 +345,7 @@ static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
if (vcpu->arch.sysregs_loaded_on_cpu)
write_sysreg_el1(v, SYS_SPSR);
else
- vcpu->arch.ctxt.spsr[KVM_SPSR_EL1] = v;
+ vcpu->arch.ctxt.spsr_el1 = v;
}
/*
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index fe6d5a3bc338..111597123c17 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -336,7 +336,11 @@ enum vcpu_sysreg {
struct kvm_cpu_context {
struct user_pt_regs regs; /* sp = sp_el0 */
- u64 spsr[KVM_NR_SPSR];
+ u64 spsr_el1; /* aka spsr_svc */
+ u64 spsr_abt;
+ u64 spsr_und;
+ u64 spsr_irq;
+ u64 spsr_fiq;
struct user_fpsimd_state fp_regs;
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 869017e50464..9710fe55c5dd 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -130,11 +130,20 @@ static void *core_reg_addr(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
case KVM_REG_ARM_CORE_REG(elr_el1):
return __vcpu_elr_el1(vcpu);
- case KVM_REG_ARM_CORE_REG(spsr[0]) ...
- KVM_REG_ARM_CORE_REG(spsr[KVM_NR_SPSR - 1]):
- off -= KVM_REG_ARM_CORE_REG(spsr[0]);
- off /= 2;
- return &vcpu->arch.ctxt.spsr[off];
+ case KVM_REG_ARM_CORE_REG(spsr[KVM_SPSR_EL1]):
+ return &vcpu->arch.ctxt.spsr_el1;
+
+ case KVM_REG_ARM_CORE_REG(spsr[KVM_SPSR_ABT]):
+ return &vcpu->arch.ctxt.spsr_abt;
+
+ case KVM_REG_ARM_CORE_REG(spsr[KVM_SPSR_UND]):
+ return &vcpu->arch.ctxt.spsr_und;
+
+ case KVM_REG_ARM_CORE_REG(spsr[KVM_SPSR_IRQ]):
+ return &vcpu->arch.ctxt.spsr_irq;
+
+ case KVM_REG_ARM_CORE_REG(spsr[KVM_SPSR_FIQ]):
+ return &vcpu->arch.ctxt.spsr_fiq;
case KVM_REG_ARM_CORE_REG(fp_regs.vregs[0]) ...
KVM_REG_ARM_CORE_REG(fp_regs.vregs[31]):
diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c
index e5359cd39b32..afc603f800e9 100644
--- a/arch/arm64/kvm/hyp/sysreg-sr.c
+++ b/arch/arm64/kvm/hyp/sysreg-sr.c
@@ -60,7 +60,7 @@ static void __hyp_text __sysreg_save_vel1_state(struct kvm_cpu_context *ctxt)
ctxt_sys_reg(ctxt, SP_EL1) = read_sysreg(sp_el1);
ctxt_sys_reg(ctxt, ELR_EL1) = read_sysreg_el1(SYS_ELR);
- ctxt->spsr[KVM_SPSR_EL1] = read_sysreg_el1(SYS_SPSR);
+ ctxt->spsr_el1 = read_sysreg_el1(SYS_SPSR);
}
static void __sysreg_save_vel2_state(struct kvm_cpu_context *ctxt)
@@ -325,7 +325,7 @@ static void __hyp_text __sysreg_restore_vel1_state(struct kvm_cpu_context *ctxt)
write_sysreg(ctxt_sys_reg(ctxt, SP_EL1), sp_el1);
write_sysreg_el1(ctxt_sys_reg(ctxt, ELR_EL1), SYS_ELR);
- write_sysreg_el1(ctxt->spsr[KVM_SPSR_EL1], SYS_SPSR);
+ write_sysreg_el1(ctxt->spsr_el1, SYS_SPSR);
}
static void __hyp_text __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
@@ -408,18 +408,17 @@ NOKPROBE_SYMBOL(sysreg_restore_guest_state_vhe);
void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu)
{
- u64 *spsr, *sysreg;
+ u64 *sysreg;
if (!vcpu_el1_is_32bit(vcpu))
return;
- spsr = vcpu->arch.ctxt.spsr;
sysreg = vcpu->arch.ctxt.sys_regs;
- spsr[KVM_SPSR_ABT] = read_sysreg(spsr_abt);
- spsr[KVM_SPSR_UND] = read_sysreg(spsr_und);
- spsr[KVM_SPSR_IRQ] = read_sysreg(spsr_irq);
- spsr[KVM_SPSR_FIQ] = read_sysreg(spsr_fiq);
+ vcpu->arch.ctxt.spsr_abt = read_sysreg(spsr_abt);
+ vcpu->arch.ctxt.spsr_und = read_sysreg(spsr_und);
+ vcpu->arch.ctxt.spsr_irq = read_sysreg(spsr_irq);
+ vcpu->arch.ctxt.spsr_fiq = read_sysreg(spsr_fiq);
sysreg[DACR32_EL2] = read_sysreg(dacr32_el2);
sysreg[IFSR32_EL2] = read_sysreg(ifsr32_el2);
@@ -430,18 +429,17 @@ void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu)
void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu)
{
- u64 *spsr, *sysreg;
+ u64 *sysreg;
if (!vcpu_el1_is_32bit(vcpu))
return;
- spsr = vcpu->arch.ctxt.spsr;
sysreg = vcpu->arch.ctxt.sys_regs;
- write_sysreg(spsr[KVM_SPSR_ABT], spsr_abt);
- write_sysreg(spsr[KVM_SPSR_UND], spsr_und);
- write_sysreg(spsr[KVM_SPSR_IRQ], spsr_irq);
- write_sysreg(spsr[KVM_SPSR_FIQ], spsr_fiq);
+ write_sysreg(vcpu->arch.ctxt.spsr_abt, spsr_abt);
+ write_sysreg(vcpu->arch.ctxt.spsr_und, spsr_und);
+ write_sysreg(vcpu->arch.ctxt.spsr_irq, spsr_irq);
+ write_sysreg(vcpu->arch.ctxt.spsr_fiq, spsr_fiq);
write_sysreg(sysreg[DACR32_EL2], dacr32_el2);
write_sysreg(sysreg[IFSR32_EL2], ifsr32_el2);
diff --git a/arch/arm64/kvm/regmap.c b/arch/arm64/kvm/regmap.c
index b1596f314087..97c110810527 100644
--- a/arch/arm64/kvm/regmap.c
+++ b/arch/arm64/kvm/regmap.c
@@ -147,8 +147,20 @@ unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu)
{
int spsr_idx = vcpu_spsr32_mode(vcpu);
- if (!vcpu->arch.sysregs_loaded_on_cpu)
- return vcpu->arch.ctxt.spsr[spsr_idx];
+ if (!vcpu->arch.sysregs_loaded_on_cpu) {
+ switch (spsr_idx) {
+ case KVM_SPSR_SVC:
+ return vcpu->arch.ctxt.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:
@@ -171,7 +183,24 @@ 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) {
- vcpu->arch.ctxt.spsr[spsr_idx] = v;
+ switch (spsr_idx) {
+ case KVM_SPSR_SVC:
+ vcpu->arch.ctxt.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;
}
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 2c3e90e192b4..0d3500a11c50 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1850,9 +1850,9 @@ static bool access_spsr(struct kvm_vcpu *vcpu,
return false;
if (p->is_write)
- vcpu->arch.ctxt.spsr[KVM_SPSR_EL1] = p->regval;
+ vcpu->arch.ctxt.spsr_el1 = p->regval;
else
- p->regval = vcpu->arch.ctxt.spsr[KVM_SPSR_EL1];
+ p->regval = vcpu->arch.ctxt.spsr_el1;
return true;
}
--
2.20.1
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