2023-07-22 02:25:29

by Raghavendra Rao Ananta

Subject: [PATCH v7 09/12] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

Implement kvm_arch_flush_remote_tlbs_range() for arm64
to invalidate the given range in the TLB.

Signed-off-by: Raghavendra Rao Ananta <[email protected]>
Reviewed-by: Gavin Shan <[email protected]>
Reviewed-by: Shaoqin Huang <[email protected]>
---
arch/arm64/include/asm/kvm_host.h | 3 +++
arch/arm64/kvm/mmu.c | 7 +++++++
2 files changed, 10 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7281222f24ef..52d3ed918893 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1114,6 +1114,9 @@ struct kvm *kvm_arch_alloc_vm(void);
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
int kvm_arch_flush_remote_tlbs(struct kvm *kvm);

+#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
+int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages);
+
static inline bool kvm_vm_is_protected(struct kvm *kvm)
{
return false;
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 0ac721fa27f1..387f2215fde7 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -172,6 +172,13 @@ int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
return 0;
}

+int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages)
+{
+ kvm_tlb_flush_vmid_range(&kvm->arch.mmu,
+ start_gfn << PAGE_SHIFT, pages << PAGE_SHIFT);
+ return 0;
+}
+
static bool kvm_is_device_pfn(unsigned long pfn)
{
return !pfn_is_map_memory(pfn);
--
2.41.0.487.g6d72f3e995-goog

2023-07-27 14:06:21

by Marc Zyngier

Subject: Re: [PATCH v7 09/12] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

On Sat, 22 Jul 2023 03:22:48 +0100,
Raghavendra Rao Ananta <[email protected]> wrote:
>
> Implement kvm_arch_flush_remote_tlbs_range() for arm64
> to invalidate the given range in the TLB.
>
> Signed-off-by: Raghavendra Rao Ananta <[email protected]>
> Reviewed-by: Gavin Shan <[email protected]>
> Reviewed-by: Shaoqin Huang <[email protected]>
> ---
> arch/arm64/include/asm/kvm_host.h | 3 +++
> arch/arm64/kvm/mmu.c | 7 +++++++
> 2 files changed, 10 insertions(+)
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 7281222f24ef..52d3ed918893 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -1114,6 +1114,9 @@ struct kvm *kvm_arch_alloc_vm(void);
> #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
> int kvm_arch_flush_remote_tlbs(struct kvm *kvm);
>
> +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
> +int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages);

As per the other patches, these prototypes should be global and not
arch-specific.

M.

--
Without deviation from the norm, progress is not possible.