[PATCH v2 05/28] ARM: KVM: Move GP registers into the CPU context structure

Marc Zyngier
2016-02-04T11:00:22Z

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

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/include/asm/kvm_emulate.h | 8 ++++----
arch/arm/include/asm/kvm_host.h | 3 +--
arch/arm/kernel/asm-offsets.c | 18 +++++++++---------
arch/arm/kvm/emulate.c | 12 ++++++------
arch/arm/kvm/guest.c | 4 ++--
arch/arm/kvm/interrupts_head.S | 11 +++++++++++
arch/arm/kvm/reset.c | 2 +-
7 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 32bb52a..f710616 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -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;;
}

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 4203701..02932ba 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -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);

diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 43f8b01..2f3e0b0 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -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));
diff --git a/arch/arm/kvm/emulate.c b/arch/arm/kvm/emulate.c
index ee161b1..a494def 100644
--- a/arch/arm/kvm/emulate.c
+++ b/arch/arm/kvm/emulate.c
@@ -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();
}
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
index 5fa69d7..86e26fb 100644
--- a/arch/arm/kvm/guest.c
+++ b/arch/arm/kvm/guest.c
@@ -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)
diff --git a/arch/arm/kvm/interrupts_head.S b/arch/arm/kvm/interrupts_head.S
index b9d9531..e0943cb8 100644
--- a/arch/arm/kvm/interrupts_head.S
+++ b/arch/arm/kvm/interrupts_head.S
@@ -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))
diff --git a/arch/arm/kvm/reset.c b/arch/arm/kvm/reset.c
index eeb85858..0048b5a 100644
--- a/arch/arm/kvm/reset.c
+++ b/arch/arm/kvm/reset.c
@@ -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);
--
2.1.4