On Wed, Jun 24, 2015 at 08:30:26PM -0700, Mario Smarduch wrote:
> Define the required kvm_vcpu_arch fields, and offsets to manage VFP state. And
> declary Hyp interface function to switch VFP registers.
>
>
> Signed-off-by: Mario Smarduch <m.smarduch@xxxxxxxxxxx>
> ---
> arch/arm/include/asm/kvm_asm.h | 1 +
> arch/arm/include/asm/kvm_host.h | 3 +++
> arch/arm/kernel/asm-offsets.c | 1 +
> 3 files changed, 5 insertions(+)
>
> diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h
> index 25410b2..08dda8c 100644
> --- a/arch/arm/include/asm/kvm_asm.h
> +++ b/arch/arm/include/asm/kvm_asm.h
> @@ -97,6 +97,7 @@ extern char __kvm_hyp_code_end[];
> extern void __kvm_flush_vm_context(void);
> extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
> extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
> +extern void __kvm_restore_host_vfp_state(struct kvm_vcpu *vcpu);
>
> extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
> #endif
> diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
> index d71607c..22cea72 100644
> --- a/arch/arm/include/asm/kvm_host.h
> +++ b/arch/arm/include/asm/kvm_host.h
> @@ -111,6 +111,9 @@ struct kvm_vcpu_arch {
> /* Interrupt related fields */
> u32 irq_lines; /* IRQ and FIQ levels */
>
> + /* Track if VFP registers are occupied by Guest while in KVM host mode*/
why capitalize guest?
missing space at the end of the line.
I don't really understand what the semantics of this field is by just
lookint at this patch. I would probably define a u32 flags field in
stead and define a patch akin to what we do for the debug registers and
call it 'vfp_dirty', and in a comment for the flag offset define say
something like:
The vfp_dirty flag must be set if the host VFP register state is
modified.
> + u32 vfp_guest_saved;
> +
> /* 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..35093d0 100644
> --- a/arch/arm/kernel/asm-offsets.c
> +++ b/arch/arm/kernel/asm-offsets.c
> @@ -191,6 +191,7 @@ int main(void)
> DEFINE(VCPU_HPFAR, offsetof(struct kvm_vcpu, arch.fault.hpfar));
> DEFINE(VCPU_HYP_PC, offsetof(struct kvm_vcpu, arch.fault.hyp_pc));
> DEFINE(VCPU_VGIC_CPU, offsetof(struct kvm_vcpu, arch.vgic_cpu));
> + DEFINE(VCPU_VFP_SAVED, offsetof(struct kvm_vcpu, arch.vfp_guest_saved));
> DEFINE(VGIC_V2_CPU_HCR, offsetof(struct vgic_cpu, vgic_v2.vgic_hcr));
> DEFINE(VGIC_V2_CPU_VMCR, offsetof(struct vgic_cpu, vgic_v2.vgic_vmcr));
> DEFINE(VGIC_V2_CPU_MISR, offsetof(struct vgic_cpu, vgic_v2.vgic_misr));
> --
> 1.7.9.5
>
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