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kvm/arm: use PSR_AA32 definitions
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Some code cares about the SPSR_ELx format for exceptions taken from
AArch32 to inspect or manipulate the SPSR_ELx value, which is already in
the SPSR_ELx format, and not in the AArch32 PSR format.

To separate these from cases where we care about the AArch32 PSR format,
migrate these cases to use the PSR_AA32_* definitions rather than
COMPAT_PSR_*.

There should be no functional change as a result of this patch.

Note that arm64 KVM does not support a compat KVM API, and always uses
the SPSR_ELx format, even for AArch32 guests.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Mark Rutland authored and Will Deacon committed Jul 5, 2018
1 parent d64567f commit 256c096
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Showing 7 changed files with 43 additions and 43 deletions.
14 changes: 7 additions & 7 deletions arch/arm/include/asm/kvm_emulate.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,13 +26,13 @@
#include <asm/cputype.h>

/* arm64 compatibility macros */
#define COMPAT_PSR_MODE_ABT ABT_MODE
#define COMPAT_PSR_MODE_UND UND_MODE
#define COMPAT_PSR_T_BIT PSR_T_BIT
#define COMPAT_PSR_I_BIT PSR_I_BIT
#define COMPAT_PSR_A_BIT PSR_A_BIT
#define COMPAT_PSR_E_BIT PSR_E_BIT
#define COMPAT_PSR_IT_MASK PSR_IT_MASK
#define PSR_AA32_MODE_ABT ABT_MODE
#define PSR_AA32_MODE_UND UND_MODE
#define PSR_AA32_T_BIT PSR_T_BIT
#define PSR_AA32_I_BIT PSR_I_BIT
#define PSR_AA32_A_BIT PSR_A_BIT
#define PSR_AA32_E_BIT PSR_E_BIT
#define PSR_AA32_IT_MASK PSR_IT_MASK

unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);

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10 changes: 5 additions & 5 deletions arch/arm64/include/asm/kvm_emulate.h
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Original file line number Diff line number Diff line change
Expand Up @@ -140,7 +140,7 @@ static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)

static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
{
*vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
*vcpu_cpsr(vcpu) |= PSR_AA32_T_BIT;
}

/*
Expand Down Expand Up @@ -190,8 +190,8 @@ static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
u32 mode;

if (vcpu_mode_is_32bit(vcpu)) {
mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
return mode > COMPAT_PSR_MODE_USR;
mode = *vcpu_cpsr(vcpu) & PSR_AA32_MODE_MASK;
return mode > PSR_AA32_MODE_USR;
}

mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
Expand Down Expand Up @@ -329,7 +329,7 @@ static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
{
if (vcpu_mode_is_32bit(vcpu)) {
*vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
*vcpu_cpsr(vcpu) |= PSR_AA32_E_BIT;
} else {
u64 sctlr = vcpu_read_sys_reg(vcpu, SCTLR_EL1);
sctlr |= (1 << 25);
Expand All @@ -340,7 +340,7 @@ static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
{
if (vcpu_mode_is_32bit(vcpu))
return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
return !!(*vcpu_cpsr(vcpu) & PSR_AA32_E_BIT);

return !!(vcpu_read_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
}
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14 changes: 7 additions & 7 deletions arch/arm64/kvm/guest.c
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Original file line number Diff line number Diff line change
Expand Up @@ -107,14 +107,14 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
}

if (off == KVM_REG_ARM_CORE_REG(regs.pstate)) {
u32 mode = (*(u32 *)valp) & COMPAT_PSR_MODE_MASK;
u32 mode = (*(u32 *)valp) & PSR_AA32_MODE_MASK;
switch (mode) {
case COMPAT_PSR_MODE_USR:
case COMPAT_PSR_MODE_FIQ:
case COMPAT_PSR_MODE_IRQ:
case COMPAT_PSR_MODE_SVC:
case COMPAT_PSR_MODE_ABT:
case COMPAT_PSR_MODE_UND:
case PSR_AA32_MODE_USR:
case PSR_AA32_MODE_FIQ:
case PSR_AA32_MODE_IRQ:
case PSR_AA32_MODE_SVC:
case PSR_AA32_MODE_ABT:
case PSR_AA32_MODE_UND:
case PSR_MODE_EL0t:
case PSR_MODE_EL1t:
case PSR_MODE_EL1h:
Expand Down
2 changes: 1 addition & 1 deletion arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@
static bool __hyp_text __is_be(struct kvm_vcpu *vcpu)
{
if (vcpu_mode_is_32bit(vcpu))
return !!(read_sysreg_el2(spsr) & COMPAT_PSR_E_BIT);
return !!(read_sysreg_el2(spsr) & PSR_AA32_E_BIT);

return !!(read_sysreg(SCTLR_EL1) & SCTLR_ELx_EE);
}
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22 changes: 11 additions & 11 deletions arch/arm64/kvm/regmap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -112,22 +112,22 @@ static const unsigned long vcpu_reg_offsets[VCPU_NR_MODES][16] = {
unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num)
{
unsigned long *reg_array = (unsigned long *)&vcpu->arch.ctxt.gp_regs.regs;
unsigned long mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
unsigned long mode = *vcpu_cpsr(vcpu) & PSR_AA32_MODE_MASK;

switch (mode) {
case COMPAT_PSR_MODE_USR ... COMPAT_PSR_MODE_SVC:
case PSR_AA32_MODE_USR ... PSR_AA32_MODE_SVC:
mode &= ~PSR_MODE32_BIT; /* 0 ... 3 */
break;

case COMPAT_PSR_MODE_ABT:
case PSR_AA32_MODE_ABT:
mode = 4;
break;

case COMPAT_PSR_MODE_UND:
case PSR_AA32_MODE_UND:
mode = 5;
break;

case COMPAT_PSR_MODE_SYS:
case PSR_AA32_MODE_SYS:
mode = 0; /* SYS maps to USR */
break;

Expand All @@ -143,13 +143,13 @@ unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num)
*/
static int vcpu_spsr32_mode(const struct kvm_vcpu *vcpu)
{
unsigned long mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
unsigned long mode = *vcpu_cpsr(vcpu) & PSR_AA32_MODE_MASK;
switch (mode) {
case COMPAT_PSR_MODE_SVC: return KVM_SPSR_SVC;
case COMPAT_PSR_MODE_ABT: return KVM_SPSR_ABT;
case COMPAT_PSR_MODE_UND: return KVM_SPSR_UND;
case COMPAT_PSR_MODE_IRQ: return KVM_SPSR_IRQ;
case COMPAT_PSR_MODE_FIQ: return KVM_SPSR_FIQ;
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();
}
}
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4 changes: 2 additions & 2 deletions arch/arm64/kvm/reset.c
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Original file line number Diff line number Diff line change
Expand Up @@ -42,8 +42,8 @@ static const struct kvm_regs default_regs_reset = {
};

static const struct kvm_regs default_regs_reset32 = {
.regs.pstate = (COMPAT_PSR_MODE_SVC | COMPAT_PSR_A_BIT |
COMPAT_PSR_I_BIT | COMPAT_PSR_F_BIT),
.regs.pstate = (PSR_AA32_MODE_SVC | PSR_AA32_A_BIT |
PSR_AA32_I_BIT | PSR_AA32_F_BIT),
};

static bool cpu_has_32bit_el1(void)
Expand Down
20 changes: 10 additions & 10 deletions virt/kvm/arm/aarch32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,9 +108,9 @@ static void __hyp_text kvm_adjust_itstate(struct kvm_vcpu *vcpu)
{
unsigned long itbits, cond;
unsigned long cpsr = *vcpu_cpsr(vcpu);
bool is_arm = !(cpsr & COMPAT_PSR_T_BIT);
bool is_arm = !(cpsr & PSR_AA32_T_BIT);

if (is_arm || !(cpsr & COMPAT_PSR_IT_MASK))
if (is_arm || !(cpsr & PSR_AA32_IT_MASK))
return;

cond = (cpsr & 0xe000) >> 13;
Expand All @@ -123,7 +123,7 @@ static void __hyp_text kvm_adjust_itstate(struct kvm_vcpu *vcpu)
else
itbits = (itbits << 1) & 0x1f;

cpsr &= ~COMPAT_PSR_IT_MASK;
cpsr &= ~PSR_AA32_IT_MASK;
cpsr |= cond << 13;
cpsr |= (itbits & 0x1c) << (10 - 2);
cpsr |= (itbits & 0x3) << 25;
Expand All @@ -138,7 +138,7 @@ void __hyp_text kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr)
{
bool is_thumb;

is_thumb = !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_T_BIT);
is_thumb = !!(*vcpu_cpsr(vcpu) & PSR_AA32_T_BIT);
if (is_thumb && !is_wide_instr)
*vcpu_pc(vcpu) += 2;
else
Expand All @@ -164,16 +164,16 @@ static void prepare_fault32(struct kvm_vcpu *vcpu, u32 mode, u32 vect_offset)
{
unsigned long cpsr;
unsigned long new_spsr_value = *vcpu_cpsr(vcpu);
bool is_thumb = (new_spsr_value & COMPAT_PSR_T_BIT);
bool is_thumb = (new_spsr_value & PSR_AA32_T_BIT);
u32 return_offset = return_offsets[vect_offset >> 2][is_thumb];
u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);

cpsr = mode | COMPAT_PSR_I_BIT;
cpsr = mode | PSR_AA32_I_BIT;

if (sctlr & (1 << 30))
cpsr |= COMPAT_PSR_T_BIT;
cpsr |= PSR_AA32_T_BIT;
if (sctlr & (1 << 25))
cpsr |= COMPAT_PSR_E_BIT;
cpsr |= PSR_AA32_E_BIT;

*vcpu_cpsr(vcpu) = cpsr;

Expand All @@ -192,7 +192,7 @@ static void prepare_fault32(struct kvm_vcpu *vcpu, u32 mode, u32 vect_offset)

void kvm_inject_undef32(struct kvm_vcpu *vcpu)
{
prepare_fault32(vcpu, COMPAT_PSR_MODE_UND, 4);
prepare_fault32(vcpu, PSR_AA32_MODE_UND, 4);
}

/*
Expand All @@ -216,7 +216,7 @@ static void inject_abt32(struct kvm_vcpu *vcpu, bool is_pabt,
fsr = &vcpu_cp15(vcpu, c5_DFSR);
}

prepare_fault32(vcpu, COMPAT_PSR_MODE_ABT | COMPAT_PSR_A_BIT, vect_offset);
prepare_fault32(vcpu, PSR_AA32_MODE_ABT | PSR_AA32_A_BIT, vect_offset);

*far = addr;

Expand Down

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