Re: [PATCH v13 2/3] arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable

[Will Deacon]

On Wed, Jun 06, 2018 at 12:31:20PM +0530, Chintan Pandya wrote:
> Add an interface to invalidate intermediate page tables
> from TLB for kernel.
> 
> Signed-off-by: Chintan Pandya 
> ---
>  arch/arm64/include/asm/tlbflush.h | 7 +++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/tlbflush.h 
> b/arch/arm64/include/asm/tlbflush.h
> index dfc61d7..a4a1901 100644
> --- a/arch/arm64/include/asm/tlbflush.h
> +++ b/arch/arm64/include/asm/tlbflush.h
> @@ -218,6 +218,13 @@ static inline void __flush_tlb_pgtable(struct mm_struct 
> *mm,
>   dsb(ish);
>  }
>  
> +static inline void __flush_tlb_kernel_pgtable(unsigned long kaddr)
> +{
> + unsigned long addr = __TLBI_VADDR(kaddr, 0);
> +
> + __tlbi(vaae1is, addr);
> + dsb(ish);
> +}
>  #endif

Acked-by: Will Deacon 

Will

[PATCH v13 2/3] arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable

[Chintan Pandya]

Add an interface to invalidate intermediate page tables
from TLB for kernel.

Signed-off-by: Chintan Pandya 
---
 arch/arm64/include/asm/tlbflush.h | 7 +++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/include/asm/tlbflush.h 
b/arch/arm64/include/asm/tlbflush.h
index dfc61d7..a4a1901 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -218,6 +218,13 @@ static inline void __flush_tlb_pgtable(struct mm_struct 
*mm,
dsb(ish);
 }
 
+static inline void __flush_tlb_kernel_pgtable(unsigned long kaddr)
+{
+   unsigned long addr = __TLBI_VADDR(kaddr, 0);
+
+   __tlbi(vaae1is, addr);
+   dsb(ish);
+}
 #endif
 
 #endif
-- 
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