[PATCH v6 1/4] add ARMv7 HYP API to flush VM TLBs without address param

Mario Smarduch
2014-05-15T18:28:23Z

Patch adds HYP interface for global VM TLB invalidation without address
parameter. Added ARM version of kvm_flush_remote_tlbs(), made generic one weak.

Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
---
arch/arm/include/asm/kvm_asm.h | 1 +
arch/arm/kvm/interrupts.S | 11 +++++++++++
arch/arm/kvm/mmu.c | 15 +++++++++++++++
virt/kvm/kvm_main.c | 2 +-
4 files changed, 28 insertions(+), 1 deletion(-)

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/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
index 0d68d40..bddc66b 100644
--- a/arch/arm/kvm/interrupts.S
+++ b/arch/arm/kvm/interrupts.S
@@ -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
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 80bb1e6..eea3f0a 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -56,6 +56,21 @@ static void kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, kvm, ipa);
}

+/**
+ * kvm_flush_remote_tlbs() - flush all VM TLB entries
+ *
+ * Interface to HYP function to flush all VM TLB entries without address
+ * parameter. In HYP mode reuses __kvm_tlb_flush_vmid_ipa() function used by
+ * kvm_tlb_flush_vmid_ipa().
+ *
+ * @kvm: pointer to kvm structure.
+ */
+void kvm_flush_remote_tlbs(struct kvm *kvm)
+{
+ if (kvm)
+ kvm_call_hyp(__kvm_tlb_flush_vmid, kvm);
+}
+
static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache,
int min, int max)
{
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index fa70c6e..ba25765 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -184,7 +184,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
return called;
}

-void kvm_flush_remote_tlbs(struct kvm *kvm)
+void __weak kvm_flush_remote_tlbs(struct kvm *kvm)
{
long dirty_count = kvm->tlbs_dirty;

--
1.7.9.5