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From:   Chintan Pandya <cpandya@codeaurora.org>
To:     Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>,
        Mark Rutland <mark.rutland@arm.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Philip Elcan <pelcan@codeaurora.org>,
        James Morse <james.morse@arm.com>,
        Kristina Martsenko <kristina.martsenko@arm.com>,
        Toshi Kani <toshi.kani@hpe.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Joerg Roedel <joro@8bytes.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-arch@vger.kernel.org, Chintan Pandya <cpandya@codeaurora.org>
Subject: [PATCH v9 2/4] arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable
Date:   Mon, 30 Apr 2018 13:11:32 +0530
Message-Id: <1525074094-25839-3-git-send-email-cpandya@codeaurora.org>
In-Reply-To: <1525074094-25839-1-git-send-email-cpandya@codeaurora.org>
References: <1525074094-25839-1-git-send-email-cpandya@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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

Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
---
 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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