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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2017-12-27 20:01:52 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:17 +0000 |
| commit | 00536ec476601a60d976eebf6aeb9633d4fb37d9 (patch) | |
| tree | 97e75b07520e9f3b444a6d535ec9d41e797776cc /arch/arm/kvm | |
| parent | d47533dab9f50eeb7289a38035c39c9eadb1e048 (diff) | |
| download | lwn-00536ec476601a60d976eebf6aeb9633d4fb37d9.tar.gz lwn-00536ec476601a60d976eebf6aeb9633d4fb37d9.zip | |
KVM: arm/arm64: Prepare to handle deferred save/restore of SPSR_EL1
SPSR_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.
The handling of accessing the various banked SPSRs for 32-bit VMs is a
bit clunky, but this will be improved in following patches which will
first prepare and subsequently implement deferred save/restore of the
32-bit registers, including the 32-bit SPSRs.
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/arm/kvm')
| -rw-r--r-- | arch/arm/kvm/emulate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kvm/emulate.c b/arch/arm/kvm/emulate.c index fa501bf437f3..9046b53d87c1 100644 --- a/arch/arm/kvm/emulate.c +++ b/arch/arm/kvm/emulate.c @@ -142,7 +142,7 @@ unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num) /* * Return the SPSR for the current mode of the virtual CPU. */ -unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu) +unsigned long *__vcpu_spsr(struct kvm_vcpu *vcpu) { unsigned long mode = *vcpu_cpsr(vcpu) & MODE_MASK; switch (mode) { |