diff options
| author | Christoffer Dall <christoffer.dall@linaro.org> | 2017-12-13 22:56:48 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:11 +0000 |
| commit | e72341c5126a70072a10585c45923dd55050ca79 (patch) | |
| tree | c7058585ee14d447e5e8cede1d9075364ce90050 /arch/arm64/kvm/hyp/switch.c | |
| parent | bc192ceec37108bf6c04a5c5795fcea5f940b0de (diff) | |
| download | linux-stable-e72341c5126a70072a10585c45923dd55050ca79.tar.gz linux-stable-e72341c5126a70072a10585c45923dd55050ca79.tar.bz2 linux-stable-e72341c5126a70072a10585c45923dd55050ca79.zip | |
KVM: arm/arm64: Introduce vcpu_el1_is_32bit
We have numerous checks around that checks if the HCR_EL2 has the RW bit
set to figure out if we're running an AArch64 or AArch32 VM. In some
cases, directly checking the RW bit (given its unintuitive name), is a
bit confusing, and that's not going to improve as we move logic around
for the following patches that optimize KVM on AArch64 hosts with VHE.
Therefore, introduce a helper, vcpu_el1_is_32bit, and replace existing
direct checks of HCR_EL2.RW with the helper.
Reviewed-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Acked-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/kvm/hyp/switch.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/switch.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 80bf38ccc8a4..c3e88ba81e26 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -74,7 +74,7 @@ static hyp_alternate_select(__activate_traps_arch, static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu) { - u64 val; + u64 hcr = vcpu->arch.hcr_el2; /* * We are about to set CPTR_EL2.TFP to trap all floating point @@ -85,17 +85,16 @@ static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu) * If FP/ASIMD is not implemented, FPEXC is UNDEFINED and any access to * it will cause an exception. */ - val = vcpu->arch.hcr_el2; - - if (!(val & HCR_RW) && system_supports_fpsimd()) { + if (vcpu_el1_is_32bit(vcpu) && system_supports_fpsimd()) { write_sysreg(1 << 30, fpexc32_el2); isb(); } - write_sysreg(val, hcr_el2); - if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN) && (val & HCR_VSE)) + if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN) && (hcr & HCR_VSE)) write_sysreg_s(vcpu->arch.vsesr_el2, SYS_VSESR_EL2); + write_sysreg(hcr, hcr_el2); + /* Trap on AArch32 cp15 c15 accesses (EL1 or EL0) */ write_sysreg(1 << 15, hstr_el2); /* |