[PATCH v4 3/4] arm64: Use __tlbi() macros in KVM code

Christopher Covington
2017-01-25T15:52:54Z

Refactor the KVM code to use the __tlbi macros, which will allow an errata
workaround that repeats tlbi dsb sequences to only change one location.
This is not intended to change the generated assembly and comparing before
and after vmlinux objdump shows no functional changes.

Signed-off-by: Christopher Covington <cov@codeaurora.org>
---
arch/arm64/kvm/hyp/tlb.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/hyp/tlb.c b/arch/arm64/kvm/hyp/tlb.c
index 88e2f2b938f0..e8e7ba2bc11f 100644
--- a/arch/arm64/kvm/hyp/tlb.c
+++ b/arch/arm64/kvm/hyp/tlb.c
@@ -16,6 +16,7 @@
*/

#include <asm/kvm_hyp.h>
+#include <asm/tlbflush.h>

void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
{
@@ -32,7 +33,7 @@ void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
* whole of Stage-1. Weep...
*/
ipa >>= 12;
- asm volatile("tlbi ipas2e1is, %0" : : "r" (ipa));
+ __tlbi(ipas2e1is, ipa);

/*
* We have to ensure completion of the invalidation at Stage-2,
@@ -41,7 +42,7 @@ void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
* the Stage-1 invalidation happened first.
*/
dsb(ish);
- asm volatile("tlbi vmalle1is" : : );
+ __tlbi(vmalle1is);
dsb(ish);
isb();

@@ -57,7 +58,7 @@ void __hyp_text __kvm_tlb_flush_vmid(struct kvm *kvm)
write_sysreg(kvm->arch.vttbr, vttbr_el2);
isb();

- asm volatile("tlbi vmalls12e1is" : : );
+ __tlbi(vmalls12e1is);
dsb(ish);
isb();

@@ -72,7 +73,7 @@ void __hyp_text __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu)
write_sysreg(kvm->arch.vttbr, vttbr_el2);
isb();

- asm volatile("tlbi vmalle1" : : );
+ __tlbi(vmalle1);
dsb(nsh);
isb();

@@ -82,7 +83,7 @@ void __hyp_text __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu)
void __hyp_text __kvm_flush_vm_context(void)
{
dsb(ishst);
- asm volatile("tlbi alle1is \n"
- "ic ialluis ": : );
+ __tlbi(alle1is);
+ asm volatile("ic ialluis" : : );
dsb(ish);
}
--
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