[PATCH v4 32/40] KVM: arm64: Directly call VHE and non-VHE FPSIMD enabled functions
From: Christoffer Dall <hidden>
Date: 2018-02-15 21:03:24
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
There is no longer a need for an alternative to choose the right
function to tell us whether or not FPSIMD was enabled for the VM,
because we can simply cann the appropriate functions directly fromwithin
the _vhe and _nvhe run functions.
Signed-off-by: Christoffer Dall <redacted>
---
Notes:
Changes since v3:
- New patch since we no longer defer FPSIMD handling to load/put
arch/arm64/kvm/hyp/switch.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 17e3c6f26a34..9c40e203bd09 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c@@ -33,20 +33,11 @@ static bool __hyp_text __fpsimd_enabled_nvhe(void) return !(read_sysreg(cptr_el2) & CPTR_EL2_TFP); } -static bool __hyp_text __fpsimd_enabled_vhe(void) +static bool fpsimd_enabled_vhe(void) { return !!(read_sysreg(cpacr_el1) & CPACR_EL1_FPEN); } -static hyp_alternate_select(__fpsimd_is_enabled, - __fpsimd_enabled_nvhe, __fpsimd_enabled_vhe, - ARM64_HAS_VIRT_HOST_EXTN); - -bool __hyp_text __fpsimd_enabled(void) -{ - return __fpsimd_is_enabled()(); -} - /* Save the 32-bit only FPSIMD system register state */ static inline void __hyp_text __fpsimd_save_fpexc32(struct kvm_vcpu *vcpu) {
@@ -413,7 +404,7 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu) /* And we're baaack! */ } while (fixup_guest_exit(vcpu, &exit_code)); - fp_enabled = __fpsimd_enabled(); + fp_enabled = fpsimd_enabled_vhe(); sysreg_save_guest_state_vhe(guest_ctxt); __vgic_save_state(vcpu);
@@ -478,7 +469,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu) __qcom_hyp_sanitize_btac_predictors(); } - fp_enabled = __fpsimd_enabled(); + fp_enabled = __fpsimd_enabled_nvhe(); __sysreg_save_state_nvhe(guest_ctxt); __sysreg32_save_state(vcpu);
--
2.14.2