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[PULL,4/4] arm64: KVM: Remove pgd_lock

Message ID 20180903134516.17796-5-christoffer.dall@arm.com (mailing list archive)
State New, archived
Headers show
Series [PULL,1/4] KVM: arm/arm64: Clean dcache to PoC when changing PTE due to CoW | expand

Commit Message

Christoffer Dall Sept. 3, 2018, 1:45 p.m. UTC 
From: Steven Price <steven.price@arm.com>

The lock has never been used and the page tables are protected by
mmu_lock in struct kvm.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
---
 arch/arm64/include/asm/kvm_host.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 8e6d46df38aa..3d6d7336f871 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -61,8 +61,7 @@  struct kvm_arch {
 	u64    vmid_gen;
 	u32    vmid;
 
-	/* 1-level 2nd stage table and lock */
-	spinlock_t pgd_lock;
+	/* 1-level 2nd stage table, protected by kvm->mmu_lock */
 	pgd_t *pgd;
 
 	/* VTTBR value associated with above pgd and vmid */