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authorMario Smarduch <m.smarduch@samsung.com>2015-07-16 21:29:38 (GMT)
committerMarc Zyngier <marc.zyngier@arm.com>2015-08-19 21:27:58 (GMT)
commit054167b3d55127feb64978eddf3f9f3a84fe493b (patch)
treef37fbf960bcf92c62f118230c043ad026248df49 /arch/arm/kvm
parent33c76a0b8126946026fa1122cb774553afae0956 (diff)
downloadlinux-054167b3d55127feb64978eddf3f9f3a84fe493b.tar.xz
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/kvm')
-rw-r--r--arch/arm/kvm/interrupts.S14
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
index 568494d..900ef6d 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.