Patchwork [24/27] KVM: arm64: Fix comment for KVM_PHYS_SHIFT

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Submitter Marc Zyngier
Date Feb. 22, 2019, 4:26 p.m.
Message ID <20190222162605.5054-25-marc.zyngier@arm.com>
Download mbox | patch
Permalink /patch/733827/
State New
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Comments

Marc Zyngier - Feb. 22, 2019, 4:26 p.m.
From: Zenghui Yu <yuzenghui@huawei.com>

Since Suzuki K Poulose's work on Dynamic IPA support, KVM_PHYS_SHIFT will
be used only when machine_type's bits[7:0] equal to 0 (by default). Thus
the outdated comment should be fixed.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
 arch/arm64/include/asm/kvm_mmu.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index c423c8c4fc39..b0742a16c6c9 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -138,7 +138,8 @@  static inline unsigned long __kern_hyp_va(unsigned long v)
 	})
 
 /*
- * We currently only support a 40bit IPA.
+ * We currently support using a VM-specified IPA size. For backward
+ * compatibility, the default IPA size is fixed to 40bits.
  */
 #define KVM_PHYS_SHIFT	(40)