[PATCH v6 1/4] KVM: arm64: Introduce cache maintenance callbacks for guest stage-2
From: Yanan Wang <hidden>
Date: 2021-06-16 09:53:00
Also in:
kvm, kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
To prepare for performing guest CMOs in the fault handlers in pgtable.c, introduce two cache maintenance callbacks in struct kvm_pgtable_mm_ops. The new callbacks are specific for guest stage-2, so they will only be initialized in 'struct kvm_pgtable_mm_ops kvm_s2_mm_ops'. Signed-off-by: Yanan Wang <redacted> --- arch/arm64/include/asm/kvm_pgtable.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index c3674c47d48c..302eca32e0af 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h@@ -44,6 +44,11 @@ typedef u64 kvm_pte_t; * in the current context. * @virt_to_phys: Convert a virtual address mapped in the current context * into a physical address. + * @flush_dcache: Clean data cache for a guest page address range before + * creating the corresponding stage-2 mapping. + * @flush_icache: Invalidate instruction cache for a guest page address + * range before creating or updating the corresponding + * stage-2 mapping. */ struct kvm_pgtable_mm_ops { void* (*zalloc_page)(void *arg);
@@ -54,6 +59,8 @@ struct kvm_pgtable_mm_ops { int (*page_count)(void *addr); void* (*phys_to_virt)(phys_addr_t phys); phys_addr_t (*virt_to_phys)(void *addr); + void (*flush_dcache)(void *addr, size_t size); + void (*flush_icache)(void *addr, size_t size); }; /**
--
2.23.0
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