diff mbox

[v3,1/3] KVM/arm: add hooks for armv7 fp/simd lazy switch support

Message ID 1446242193-8424-2-git-send-email-m.smarduch@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Mario Smarduch Oct. 30, 2015, 9:56 p.m. UTC 
This patch adds vcpu fields to track lazy state, save host FPEXC, and
offsets to fields.

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

Patch

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 3df1e97..f1bf551 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -107,6 +107,12 @@  struct kvm_vcpu_arch {
 	/* Interrupt related fields */
 	u32 irq_lines;		/* IRQ and FIQ levels */
 
+	/* fp/simd dirty flag true if guest accessed register file */
+	bool    vfp_dirty;
+
+	/* Save host FPEXC register to later restore on vcpu put */
+	u32	host_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..9f79712 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_DIRTY,	offsetof(struct kvm_vcpu, arch.vfp_dirty));
+  DEFINE(VCPU_VFP_HOST_FPEXC,	offsetof(struct kvm_vcpu, arch.host_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));