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ARM: KVM: Move GP registers into the CPU context structure

Browse Source 
Continuing our rework of the CPU context, we now move the GP
registers into the CPU context structure.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2016-01-03 11:26:01 +00:00
parent fb32a52a1d
commit c2a8dab507
7 changed files with 34 additions and 24 deletions
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8
arch/arm/include/asm/kvm_emulate.h
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@ -68,12 +68,12 @@ static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
{
return &vcpu->arch.regs.usr_regs.ARM_pc;
return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
}
static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
{
return &vcpu->arch.regs.usr_regs.ARM_cpsr;
return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
}
static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
@ -83,13 +83,13 @@ static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
{
unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
}
static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
{
unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
return cpsr_mode > USR_MODE;;
}

3
arch/arm/include/asm/kvm_host.h
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@ -89,6 +89,7 @@ struct kvm_vcpu_fault_info {
};
struct kvm_cpu_context {
struct kvm_regs gp_regs;
struct vfp_hard_struct vfp;
u32 cp15[NR_CP15_REGS];
};
@ -98,8 +99,6 @@ typedef struct kvm_cpu_context kvm_cpu_context_t;
struct kvm_vcpu_arch {
struct kvm_cpu_context ctxt;
struct kvm_regs regs;
int target; /* Processor target */
DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);

18
arch/arm/kernel/asm-offsets.c
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@ -176,15 +176,15 @@ int main(void)
DEFINE(VCPU_HOST_CTXT, offsetof(struct kvm_vcpu, arch.host_cpu_context));
DEFINE(CPU_CTXT_VFP, offsetof(struct kvm_cpu_context, vfp));
DEFINE(CPU_CTXT_CP15, offsetof(struct kvm_cpu_context, cp15));
DEFINE(VCPU_REGS, offsetof(struct kvm_vcpu, arch.regs));
DEFINE(VCPU_USR_REGS, offsetof(struct kvm_vcpu, arch.regs.usr_regs));
DEFINE(VCPU_SVC_REGS, offsetof(struct kvm_vcpu, arch.regs.svc_regs));
DEFINE(VCPU_ABT_REGS, offsetof(struct kvm_vcpu, arch.regs.abt_regs));
DEFINE(VCPU_UND_REGS, offsetof(struct kvm_vcpu, arch.regs.und_regs));
DEFINE(VCPU_IRQ_REGS, offsetof(struct kvm_vcpu, arch.regs.irq_regs));
DEFINE(VCPU_FIQ_REGS, offsetof(struct kvm_vcpu, arch.regs.fiq_regs));
DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.regs.usr_regs.ARM_pc));
DEFINE(VCPU_CPSR, offsetof(struct kvm_vcpu, arch.regs.usr_regs.ARM_cpsr));
DEFINE(CPU_CTXT_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs));
DEFINE(GP_REGS_USR, offsetof(struct kvm_regs, usr_regs));
DEFINE(GP_REGS_SVC, offsetof(struct kvm_regs, svc_regs));
DEFINE(GP_REGS_ABT, offsetof(struct kvm_regs, abt_regs));
DEFINE(GP_REGS_UND, offsetof(struct kvm_regs, und_regs));
DEFINE(GP_REGS_IRQ, offsetof(struct kvm_regs, irq_regs));
DEFINE(GP_REGS_FIQ, offsetof(struct kvm_regs, fiq_regs));
DEFINE(GP_REGS_PC, offsetof(struct kvm_regs, usr_regs.ARM_pc));
DEFINE(GP_REGS_CPSR, offsetof(struct kvm_regs, usr_regs.ARM_cpsr));
DEFINE(VCPU_HCR, offsetof(struct kvm_vcpu, arch.hcr));
DEFINE(VCPU_IRQ_LINES, offsetof(struct kvm_vcpu, arch.irq_lines));
DEFINE(VCPU_HSR, offsetof(struct kvm_vcpu, arch.fault.hsr));

12
arch/arm/kvm/emulate.c
View File

@ -112,7 +112,7 @@ static const unsigned long vcpu_reg_offsets[VCPU_NR_MODES][15] = {
*/
unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num)
{
unsigned long *reg_array = (unsigned long *)&vcpu->arch.regs;
unsigned long *reg_array = (unsigned long *)&vcpu->arch.ctxt.gp_regs;
unsigned long mode = *vcpu_cpsr(vcpu) & MODE_MASK;
switch (mode) {
@ -147,15 +147,15 @@ unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu)
unsigned long mode = *vcpu_cpsr(vcpu) & MODE_MASK;
switch (mode) {
case SVC_MODE:
return &vcpu->arch.regs.KVM_ARM_SVC_spsr;
return &vcpu->arch.ctxt.gp_regs.KVM_ARM_SVC_spsr;
case ABT_MODE:
return &vcpu->arch.regs.KVM_ARM_ABT_spsr;
return &vcpu->arch.ctxt.gp_regs.KVM_ARM_ABT_spsr;
case UND_MODE:
return &vcpu->arch.regs.KVM_ARM_UND_spsr;
return &vcpu->arch.ctxt.gp_regs.KVM_ARM_UND_spsr;
case IRQ_MODE:
return &vcpu->arch.regs.KVM_ARM_IRQ_spsr;
return &vcpu->arch.ctxt.gp_regs.KVM_ARM_IRQ_spsr;
case FIQ_MODE:
return &vcpu->arch.regs.KVM_ARM_FIQ_spsr;
return &vcpu->arch.ctxt.gp_regs.KVM_ARM_FIQ_spsr;
default:
BUG();
}

4
arch/arm/kvm/guest.c
View File

@ -55,7 +55,7 @@ static u64 core_reg_offset_from_id(u64 id)
static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
u32 __user *uaddr = (u32 __user *)(long)reg->addr;
struct kvm_regs *regs = &vcpu->arch.regs;
struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
u64 off;
if (KVM_REG_SIZE(reg->id) != 4)
@ -72,7 +72,7 @@ static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
u32 __user *uaddr = (u32 __user *)(long)reg->addr;
struct kvm_regs *regs = &vcpu->arch.regs;
struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
u64 off, val;
if (KVM_REG_SIZE(reg->id) != 4)

11
arch/arm/kvm/interrupts_head.S
View File

@ -1,6 +1,17 @@
#include <linux/irqchip/arm-gic.h>
#include <asm/assembler.h>
/* Compat macro, until we get rid of this file entierely */
#define VCPU_GP_REGS (VCPU_GUEST_CTXT + CPU_CTXT_GP_REGS)
#define VCPU_USR_REGS (VCPU_GP_REGS + GP_REGS_USR)
#define VCPU_SVC_REGS (VCPU_GP_REGS + GP_REGS_SVC)
#define VCPU_ABT_REGS (VCPU_GP_REGS + GP_REGS_ABT)
#define VCPU_UND_REGS (VCPU_GP_REGS + GP_REGS_UND)
#define VCPU_IRQ_REGS (VCPU_GP_REGS + GP_REGS_IRQ)
#define VCPU_FIQ_REGS (VCPU_GP_REGS + GP_REGS_FIQ)
#define VCPU_PC (VCPU_GP_REGS + GP_REGS_PC)
#define VCPU_CPSR (VCPU_GP_REGS + GP_REGS_CPSR)
#define VCPU_USR_REG(_reg_nr) (VCPU_USR_REGS + (_reg_nr * 4))
#define VCPU_USR_SP (VCPU_USR_REG(13))
#define VCPU_USR_LR (VCPU_USR_REG(14))

2
arch/arm/kvm/reset.c
View File

@ -71,7 +71,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
}
/* Reset core registers */
memcpy(&vcpu->arch.regs, reset_regs, sizeof(vcpu->arch.regs));
memcpy(&vcpu->arch.ctxt.gp_regs, reset_regs, sizeof(vcpu->arch.ctxt.gp_regs));
/* Reset CP15 registers */
kvm_reset_coprocs(vcpu);