diff options
| author | Christoffer Dall <christoffer.dall@linaro.org> | 2017-12-27 20:51:04 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:17 +0000 |
| commit | 6d4bd909645359b0a7619598b9ca7a1353296207 (patch) | |
| tree | 82525a23399cb427f48365ae7112aa1b4cbd633a /arch/arm64/include | |
| parent | 00536ec476601a60d976eebf6aeb9633d4fb37d9 (diff) | |
| download | op-kernel-dev-6d4bd909645359b0a7619598b9ca7a1353296207.zip op-kernel-dev-6d4bd909645359b0a7619598b9ca7a1353296207.tar.gz | |
KVM: arm64: Prepare to handle deferred save/restore of ELR_EL1
ELR_EL1 is not used by a VHE host kernel and can be deferred, but we
need to rework the accesses to this register to access the latest value
depending on whether or not guest system registers are loaded on the CPU
or only reside in memory.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kvm_emulate.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index f326401..6ed18ce 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -90,11 +90,27 @@ static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; } -static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) +static inline unsigned long *__vcpu_elr_el1(const struct kvm_vcpu *vcpu) { return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; } +static inline unsigned long vcpu_read_elr_el1(const struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.sysregs_loaded_on_cpu) + return read_sysreg_el1(elr); + else + return *__vcpu_elr_el1(vcpu); +} + +static inline void vcpu_write_elr_el1(const struct kvm_vcpu *vcpu, unsigned long v) +{ + if (vcpu->arch.sysregs_loaded_on_cpu) + write_sysreg_el1(v, elr); + else + *__vcpu_elr_el1(vcpu) = v; +} + static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) { return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; |
