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[v5,32/40] KVM: arm64: Directly call VHE and non-VHE FPSIMD enabled functions

Message ID 20180227113429.637-33-cdall@kernel.org (mailing list archive)
State New, archived
Headers show

Commit Message

Christoffer Dall Feb. 27, 2018, 11:34 a.m. UTC 
From: Christoffer Dall <christoffer.dall@linaro.org>

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 can the appropriate functions directly from within
the _vhe and _nvhe run functions.

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---

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(-)
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Patch

diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 9d90bda3c2cc..5fbb77bd4e90 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 void __hyp_text __fpsimd_save_fpexc32(struct kvm_vcpu *vcpu)
 {
@@ -414,7 +405,7 @@  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);
@@ -481,7 +472,7 @@  int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
 		}
 	}
 
-	fp_enabled = __fpsimd_enabled();
+	fp_enabled = __fpsimd_enabled_nvhe();
 
 	__sysreg_save_state_nvhe(guest_ctxt);
 	__sysreg32_save_state(vcpu);