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KVM: arm: Add ARMv7 API to flush TLBs

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This patch adds ARMv7 architecture TLB Flush function.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
This commit is contained in:
Mario Smarduch 2015-01-15 15:58:55 -08:00 committed by Christoffer Dall
parent e108ff2f80
commit 72fc36b600
4 changed files with 25 additions and 0 deletions
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1
arch/arm/include/asm/kvm_asm.h
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@ -96,6 +96,7 @@ 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

12
arch/arm/include/asm/kvm_host.h
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@ -221,6 +221,18 @@ 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_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_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;

1
arch/arm/kvm/Kconfig
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@ -21,6 +21,7 @@ config KVM
select PREEMPT_NOTIFIERS
select ANON_INODES
select HAVE_KVM_CPU_RELAX_INTERCEPT
select HAVE_KVM_ARCH_TLB_FLUSH_ALL
select KVM_MMIO
select KVM_ARM_HOST
depends on ARM_VIRT_EXT && ARM_LPAE

11
arch/arm/kvm/interrupts.S
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@ -66,6 +66,17 @@ 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