diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2013-02-06 19:54:04 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2013-06-12 16:42:15 +0100 |
| commit | 27b190bd9fbfee34536cb858f0b5924d294aac38 (patch) | |
| tree | d35b3304f685d047bc675f30156902d71f238bc5 /arch/arm64/include/asm/kvm_emulate.h | |
| parent | b547631fc64e249a3c507e6ce854642507fa7c1c (diff) | |
| download | linux-27b190bd9fbfee34536cb858f0b5924d294aac38.tar.bz2 | |
arm64: KVM: 32bit conditional execution emulation
As conditional instructions can trap on AArch32, add the thinest
possible emulation layer to keep 32bit guests happy.
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_emulate.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_emulate.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 20a1a3931d8d..eec073875218 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -31,6 +31,9 @@ unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu); +bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); +void kvm_skip_instr32(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); void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); @@ -57,12 +60,18 @@ static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) { - return true; /* No conditionals on arm64 */ + if (vcpu_mode_is_32bit(vcpu)) + return kvm_condition_valid32(vcpu); + + return true; } static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) { - *vcpu_pc(vcpu) += 4; + if (vcpu_mode_is_32bit(vcpu)) + kvm_skip_instr32(vcpu, is_wide_instr); + else + *vcpu_pc(vcpu) += 4; } static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) |