[PATCH v2 1/2] KVM/arm: add hooks for armv7 fp/simd lazy switch support

[Mario Smarduch <m.smarduch@xxxxxxxxxxx>]

This patch adds vcpu fields to track lazy state, save host FPEXC, and 
offsets to fields.

Signed-off-by: Mario Smarduch <m.smarduch@xxxxxxxxxxx>
---
 arch/arm/include/asm/kvm_host.h | 6 ++++++
 arch/arm/kernel/asm-offsets.c   | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index dcba0fa..194a8ef 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -111,6 +111,12 @@ struct kvm_vcpu_arch {
 	/* Interrupt related fields */
 	u32 irq_lines;		/* IRQ and FIQ levels */
 
+	/* Track fp/simd lazy switch state */
+	u32 vfp_lazy;
+
+	/* Save host FPEXC register to restore on vcpu put */
+	u32 saved_fpexc;
+
 	/* Exception Information */
 	struct kvm_vcpu_fault_info fault;
 
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 871b826..e1c3a41 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -186,6 +186,8 @@ int main(void)
   DEFINE(VCPU_CPSR,		offsetof(struct kvm_vcpu, arch.regs.usr_regs.ARM_cpsr));
   DEFINE(VCPU_HCR,		offsetof(struct kvm_vcpu, arch.hcr));
   DEFINE(VCPU_IRQ_LINES,	offsetof(struct kvm_vcpu, arch.irq_lines));
+  DEFINE(VCPU_VFP_LAZY,		offsetof(struct kvm_vcpu, arch.vfp_lazy));
+  DEFINE(VCPU_VFP_FPEXC,	offsetof(struct kvm_vcpu, arch.saved_fpexc));
   DEFINE(VCPU_HSR,		offsetof(struct kvm_vcpu, arch.fault.hsr));
   DEFINE(VCPU_HxFAR,		offsetof(struct kvm_vcpu, arch.fault.hxfar));
   DEFINE(VCPU_HPFAR,		offsetof(struct kvm_vcpu, arch.fault.hpfar));
-- 
1.9.1

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