From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.smarduch@samsung.com (Mario Smarduch) Date: Thu, 16 Jul 2015 14:29:38 -0700 Subject: [PATCH v4 2/2] arm: KVM: keep arm vfp/simd exit handling consistent with arm64 In-Reply-To: <1437082178-11039-1-git-send-email-m.smarduch@samsung.com> References: <1437082178-11039-1-git-send-email-m.smarduch@samsung.com> Message-ID: <1437082178-11039-3-git-send-email-m.smarduch@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- arch/arm/kvm/interrupts.S | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index 79caf79..b245b4e 100644 --- a/arch/arm/kvm/interrupts.S +++ b/arch/arm/kvm/interrupts.S @@ -363,10 +363,6 @@ 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. @@ -380,7 +376,10 @@ 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 */ @@ -411,6 +410,10 @@ 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 @@ -479,7 +482,6 @@ 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. -- 1.9.1