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| author | Mario Smarduch <m.smarduch@samsung.com> | 2015-07-16 23:29:38 +0200 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-08-19 23:27:58 +0200 |
| commit | 054167b3d55127feb64978eddf3f9f3a84fe493b (patch) | |
| tree | f37fbf960bcf92c62f118230c043ad026248df49 /arch/arm | |
| parent | arm64: KVM: Optimize arm64 skip 30-50% vfp/simd save/restore on exits (diff) | |
| download | linux-054167b3d55127feb64978eddf3f9f3a84fe493b.tar.xz linux-054167b3d55127feb64978eddf3f9f3a84fe493b.zip | |
arm: KVM: keep arm vfp/simd exit handling consistent with arm64
After enhancing arm64 FP/SIMD exit handling, ARMv7 VFP exit branch is moved
to guest trap handling. This allows us to keep exit handling flow between both
architectures consistent.
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kvm/interrupts.S | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index 568494dbbbb5..900ef6dd8f72 100644 --- a/arch/arm/kvm/interrupts.S +++ b/arch/arm/kvm/interrupts.S @@ -361,10 +361,6 @@ hyp_hvc: @ Check syndrome register mrc p15, 4, r1, c5, c2, 0 @ HSR lsr r0, r1, #HSR_EC_SHIFT -#ifdef CONFIG_VFPv3 - cmp r0, #HSR_EC_CP_0_13 - beq switch_to_guest_vfp -#endif cmp r0, #HSR_EC_HVC bne guest_trap @ Not HVC instr. @@ -378,7 +374,10 @@ hyp_hvc: cmp r2, #0 bne guest_trap @ Guest called HVC -host_switch_to_hyp: + /* + * Getting here means host called HVC, we shift parameters and branch + * to Hyp function. + */ pop {r0, r1, r2} /* Check for __hyp_get_vectors */ @@ -409,6 +408,10 @@ guest_trap: @ Check if we need the fault information lsr r1, r1, #HSR_EC_SHIFT +#ifdef CONFIG_VFPv3 + cmp r1, #HSR_EC_CP_0_13 + beq switch_to_guest_vfp +#endif cmp r1, #HSR_EC_IABT mrceq p15, 4, r2, c6, c0, 2 @ HIFAR beq 2f @@ -477,7 +480,6 @@ guest_trap: */ #ifdef CONFIG_VFPv3 switch_to_guest_vfp: - load_vcpu @ Load VCPU pointer to r0 push {r3-r7} @ NEON/VFP used. Turn on VFP access. |