On Tue, Aug 26, 2014 at 05:04:05PM -0700, Mario Smarduch wrote:
> This patch adds ARMv7 architecture TLB Flush function.
>
> Signed-off-by: Mario Smarduch <m.smarduch@xxxxxxxxxxx>
> ---
> arch/arm/include/asm/kvm_asm.h | 1 +
> arch/arm/include/asm/kvm_host.h | 12 ++++++++++++
> arch/arm/kvm/Kconfig | 1 +
> arch/arm/kvm/interrupts.S | 12 ++++++++++++
> 4 files changed, 26 insertions(+)
>
> diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h
> index 53b3c4a..21bc519 100644
> --- a/arch/arm/include/asm/kvm_asm.h
> +++ b/arch/arm/include/asm/kvm_asm.h
> @@ -78,6 +78,7 @@ 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 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 8fc078d..42877dd 100644
> --- a/arch/arm/include/asm/kvm_host.h
> +++ b/arch/arm/include/asm/kvm_host.h
> @@ -220,6 +220,18 @@ static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
> kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
> }
>
> +/**
> + * kvm_arch_flush_remote_tlbs() - flush all VM TLB entries
> + * @kvm: pointer to kvm structure.
> + *
> + * Interface to HYP function to flush all VM TLB entries without address
> + * parameter.
> + */
> +static inline void kvm_arch_flush_remote_tlbs(struct kvm *kvm)
> +{
> + kvm_call_hyp(__kvm_tlb_flush_vmid, kvm);
> +}
> +
> static inline int kvm_arch_dev_ioctl_check_extension(long ext)
> {
> return 0;
> diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
> index cd9bb1c..eba8b00 100644
> --- a/arch/arm/kvm/Kconfig
> +++ b/arch/arm/kvm/Kconfig
> @@ -24,6 +24,7 @@ config KVM
> select KVM_MMIO
> select KVM_ARM_HOST
> select HAVE_KVM_ARCH_DIRTY_LOG
> + select HAVE_KVM_ARCH_TLB_FLUSH_ALL
> depends on ARM_VIRT_EXT && ARM_LPAE && !CPU_BIG_ENDIAN
> ---help---
> Support hosting virtualized guest machines. You will also
> diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
> index 0d68d40..1258d46 100644
> --- a/arch/arm/kvm/interrupts.S
> +++ b/arch/arm/kvm/interrupts.S
> @@ -66,6 +66,18 @@ ENTRY(__kvm_tlb_flush_vmid_ipa)
> bx lr
> ENDPROC(__kvm_tlb_flush_vmid_ipa)
>
> +/**
> + * void __kvm_tlb_flush_vmid(struct kvm *kvm) - Flush per-VMID TLBs
> + *
> + * Reuses __kvm_tlb_flush_vmid_ipa() for ARMv7, without passing address
> + * parameter
> + */
> +
> +ENTRY(__kvm_tlb_flush_vmid)
> + b __kvm_tlb_flush_vmid_ipa
> +ENDPROC(__kvm_tlb_flush_vmid)
> +
> +
> /********************************************************************
> * Flush TLBs and instruction caches of all CPUs inside the inner-shareable
> * domain, for all VMIDs
> --
> 1.8.3.2
>
Acked-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
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