From c5997563298bc1b9da5212c15544962d4dbbe27d Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Sat, 8 Dec 2012 18:13:18 +0000 Subject: [PATCH] ARM: KVM: move kvm_condition_valid to emulate.c This is really hardware emulation, and as such it better be with its little friends. Signed-off-by: Marc Zyngier --- arch/arm/include/asm/kvm_emulate.h | 1 + arch/arm/kvm/arm.c | 45 ------------------------------ arch/arm/kvm/emulate.c | 45 ++++++++++++++++++++++++++++++ 3 files changed, 46 insertions(+), 45 deletions(-) diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h index e59f8c0494f3..e14268c77af0 100644 --- a/arch/arm/include/asm/kvm_emulate.h +++ b/arch/arm/include/asm/kvm_emulate.h @@ -28,6 +28,7 @@ unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num); unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu); int kvm_handle_wfi(struct kvm_vcpu *vcpu, struct kvm_run *run); +bool kvm_condition_valid(struct kvm_vcpu *vcpu); void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr); void kvm_inject_undefined(struct kvm_vcpu *vcpu); void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index 269900174102..6b776183ff93 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -44,7 +44,6 @@ #include #include #include -#include #ifdef REQUIRES_VIRT __asm__(".arch_extension virt"); @@ -545,50 +544,6 @@ static exit_handle_fn arm_exit_handlers[] = { [HSR_EC_DABT_HYP] = handle_dabt_hyp, }; -/* - * A conditional instruction is allowed to trap, even though it - * wouldn't be executed. So let's re-implement the hardware, in - * software! - */ -static bool kvm_condition_valid(struct kvm_vcpu *vcpu) -{ - unsigned long cpsr, cond, insn; - - /* - * Exception Code 0 can only happen if we set HCR.TGE to 1, to - * catch undefined instructions, and then we won't get past - * the arm_exit_handlers test anyway. - */ - BUG_ON(!kvm_vcpu_trap_get_class(vcpu)); - - /* Top two bits non-zero? Unconditional. */ - if (kvm_vcpu_get_hsr(vcpu) >> 30) - return true; - - cpsr = *vcpu_cpsr(vcpu); - - /* Is condition field valid? */ - if ((kvm_vcpu_get_hsr(vcpu) & HSR_CV) >> HSR_CV_SHIFT) - cond = (kvm_vcpu_get_hsr(vcpu) & HSR_COND) >> HSR_COND_SHIFT; - else { - /* This can happen in Thumb mode: examine IT state. */ - unsigned long it; - - it = ((cpsr >> 8) & 0xFC) | ((cpsr >> 25) & 0x3); - - /* it == 0 => unconditional. */ - if (it == 0) - return true; - - /* The cond for this insn works out as the top 4 bits. */ - cond = (it >> 4); - } - - /* Shift makes it look like an ARM-mode instruction */ - insn = cond << 28; - return arm_check_condition(insn, cpsr) != ARM_OPCODE_CONDTEST_FAIL; -} - /* * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on * proper exit to QEMU. diff --git a/arch/arm/kvm/emulate.c b/arch/arm/kvm/emulate.c index d3094eb4ade6..04dbac6bdf4d 100644 --- a/arch/arm/kvm/emulate.c +++ b/arch/arm/kvm/emulate.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include "trace.h" @@ -176,6 +177,50 @@ int kvm_handle_wfi(struct kvm_vcpu *vcpu, struct kvm_run *run) return 1; } +/* + * A conditional instruction is allowed to trap, even though it + * wouldn't be executed. So let's re-implement the hardware, in + * software! + */ +bool kvm_condition_valid(struct kvm_vcpu *vcpu) +{ + unsigned long cpsr, cond, insn; + + /* + * Exception Code 0 can only happen if we set HCR.TGE to 1, to + * catch undefined instructions, and then we won't get past + * the arm_exit_handlers test anyway. + */ + BUG_ON(!kvm_vcpu_trap_get_class(vcpu)); + + /* Top two bits non-zero? Unconditional. */ + if (kvm_vcpu_get_hsr(vcpu) >> 30) + return true; + + cpsr = *vcpu_cpsr(vcpu); + + /* Is condition field valid? */ + if ((kvm_vcpu_get_hsr(vcpu) & HSR_CV) >> HSR_CV_SHIFT) + cond = (kvm_vcpu_get_hsr(vcpu) & HSR_COND) >> HSR_COND_SHIFT; + else { + /* This can happen in Thumb mode: examine IT state. */ + unsigned long it; + + it = ((cpsr >> 8) & 0xFC) | ((cpsr >> 25) & 0x3); + + /* it == 0 => unconditional. */ + if (it == 0) + return true; + + /* The cond for this insn works out as the top 4 bits. */ + cond = (it >> 4); + } + + /* Shift makes it look like an ARM-mode instruction */ + insn = cond << 28; + return arm_check_condition(insn, cpsr) != ARM_OPCODE_CONDTEST_FAIL; +} + /** * adjust_itstate - adjust ITSTATE when emulating instructions in IT-block * @vcpu: The VCPU pointer -- 2.20.1