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| author | Marc Zyngier <marc.zyngier@arm.com> | 2013-01-28 19:27:00 +0400 |
|---|---|---|
| committer | Christoffer Dall <cdall@cs.columbia.edu> | 2013-03-07 03:48:45 +0400 |
| commit | 48762767e1c150d58c250650f8202b7d4ad65ec4 (patch) | |
| tree | 38ae7af86d7e84a6497121eda2991bedfb442f6a /arch/arm/kvm/interrupts.S | |
| parent | 06fe0b73ff17e5d777af1b26f3e227d79c0d6808 (diff) | |
| download | linux-48762767e1c150d58c250650f8202b7d4ad65ec4.tar.xz | |
ARM: KVM: change kvm_tlb_flush_vmid to kvm_tlb_flush_vmid_ipa
v8 is capable of invalidating Stage-2 by IPA, but v7 is not.
Change kvm_tlb_flush_vmid() to take an IPA parameter, which is
then ignored by the invalidation code (and nuke the whole TLB
as it always did).
This allows v8 to implement a more optimized strategy.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm/interrupts.S')
| -rw-r--r-- | arch/arm/kvm/interrupts.S | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S index a8e0c2d85cb5..f7793df62f58 100644 --- a/arch/arm/kvm/interrupts.S +++ b/arch/arm/kvm/interrupts.S @@ -35,15 +35,18 @@ __kvm_hyp_code_start: /******************************************************************** * Flush per-VMID TLBs * - * void __kvm_tlb_flush_vmid(struct kvm *kvm); + * void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); * * We rely on the hardware to broadcast the TLB invalidation to all CPUs * inside the inner-shareable domain (which is the case for all v7 * implementations). If we come across a non-IS SMP implementation, we'll * have to use an IPI based mechanism. Until then, we stick to the simple * hardware assisted version. + * + * As v7 does not support flushing per IPA, just nuke the whole TLB + * instead, ignoring the ipa value. */ -ENTRY(__kvm_tlb_flush_vmid) +ENTRY(__kvm_tlb_flush_vmid_ipa) push {r2, r3} add r0, r0, #KVM_VTTBR @@ -60,7 +63,7 @@ ENTRY(__kvm_tlb_flush_vmid) pop {r2, r3} bx lr -ENDPROC(__kvm_tlb_flush_vmid) +ENDPROC(__kvm_tlb_flush_vmid_ipa) /******************************************************************** * Flush TLBs and instruction caches of all CPUs inside the inner-shareable |