linux-kernel - [PATCH v8 2/4] arm64: tlbflush: Introduce __flush_tlb_kernel

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Date:   Tue,  3 Apr 2018 13:30:44 +0530
From:   Chintan Pandya <cpandya@...eaurora.org>
To:     catalin.marinas@....com, will.deacon@....com, mark.rutland@....com,
        toshi.kani@....com
Cc:     arnd@...db.de, ard.biesheuvel@...aro.org, marc.zyngier@....com,
        james.morse@....com, kristina.martsenko@....com,
        takahiro.akashi@...aro.org, gregkh@...uxfoundation.org,
        tglx@...utronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        akpm@...ux-foundation.org, Chintan Pandya <cpandya@...eaurora.org>
Subject: [PATCH v8 2/4] arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable

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

Signed-off-by: Chintan Pandya <cpandya@...eaurora.org>
---
 arch/arm64/include/asm/tlbflush.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index 9e82dd7..6a4816d 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -209,6 +209,12 @@ static inline void __flush_tlb_pgtable(struct mm_struct *mm,
 	dsb(ish);
 }
 
+static inline void __flush_tlb_kernel_pgtable(unsigned long addr)
+{
+	addr >>= 12;
+	__tlbi(vaae1is, addr);
+	dsb(ish);
+}
 #endif
 
 #endif
-- 
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