From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELvMCYBPDYykRoiYO9gNKrr9NCDx3TV88cVwgcJi0ynFvlfxFbn5VMTq00u/cUGvuurV1f6w ARC-Seal: i=1; a=rsa-sha256; t=1521117951; cv=none; d=google.com; s=arc-20160816; b=gOinK0Uxl5fHTUX2xevnecQH6KAGboU2TaV5H1s0+tGwt+BDOpAt8AZhUVMxAlcFH0 GenINlDhQEI8LmYKZqwb8wNQPlMsWMlvCb/JIDzRNg/ePomVfOrZQ8Ac+GTuS4g5YEG7 Ttp6fX0NzqrYqUHq5McAB9dDjdsGh7jeNOdNufbsDFEwPb3B37S+7eV5X3pAw8fXo/rJ 8/i9v0j7C4ua1ai5k/7V8gRHcO8B9jZ82254kggKvLciuG0+zKcWvhQt9W3P+O4KgzmP ng+WUAuf1sIDLIUarGt6ix+bk2NtACLidW+6rR0IF93a1SyPw9Tk6sRsCH436j3IQ9hb FN2g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dmarc-filter:dkim-signature:dkim-signature :arc-authentication-results; bh=3YwshX0zoWhp0xTSQrkM+fNVERFrg8iHu7XR6W22Zpg=; b=z6enFiAhgNK9xzxTh7x9yfkbk4lcLi0X29zIv9eJEkrAkVQLJFhLUnxR+Uv3bfMGGI BFD+k1dgBaDp1w4fsScUHv0QC3o3Cg/iwpyp4geVSXIZGzeIcd5f8yAhMRIV+1X7ToGd dnpdzA5bqGAjRz6FE1JQmzZOKP9KjK5ttsdC+XzToHiLWa9OWRledAESI3qVMSDI3Jn5 jBHzEHifNpEMx9BARbyMYkCjbPU9kUhv/fSwscxpGecPPknyilAOruYM/GRK8usRPrum 9RXienCxm4KY7vy1EIkbByJVPlWlXHGHy56ytzFPHXPO64nIZXTXEmdXkNQpV+yCFwCs CviQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=oh9Zz6ZB; dkim=pass header.i=@codeaurora.org header.s=default header.b=QsVxzI93; spf=pass (google.com: domain of cpandya@codeaurora.org designates 198.145.29.96 as permitted sender) smtp.mailfrom=cpandya@codeaurora.org Authentication-Results: mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=oh9Zz6ZB; dkim=pass header.i=@codeaurora.org header.s=default header.b=QsVxzI93; spf=pass (google.com: domain of cpandya@codeaurora.org designates 198.145.29.96 as permitted sender) smtp.mailfrom=cpandya@codeaurora.org DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 88DFE60F71 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=cpandya@codeaurora.org From: Chintan Pandya To: catalin.marinas@arm.com, will.deacon@arm.com, arnd@arndb.de Cc: mark.rutland@arm.com, ard.biesheuvel@linaro.org, marc.zyngier@arm.com, james.morse@arm.com, kristina.martsenko@arm.com, takahiro.akashi@linaro.org, gregkh@linuxfoundation.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org, toshi.kani@hpe.com, Chintan Pandya Subject: [PATCH v2 3/4] arm64: Implement page table free interfaces Date: Thu, 15 Mar 2018 18:15:05 +0530 Message-Id: <1521117906-20107-4-git-send-email-cpandya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1521117906-20107-1-git-send-email-cpandya@codeaurora.org> References: <1521117906-20107-1-git-send-email-cpandya@codeaurora.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595007777008930452?= X-GMAIL-MSGID: =?utf-8?q?1595007777008930452?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Implement pud_free_pmd_page() and pmd_free_pte_page(). Make sure, that they are indeed a page table before taking them to free. Signed-off-by: Chintan Pandya --- arch/arm64/mm/mmu.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 2dbb2c9..6f21a65 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -45,6 +46,7 @@ #include #include #include +#include #define NO_BLOCK_MAPPINGS BIT(0) #define NO_CONT_MAPPINGS BIT(1) @@ -975,10 +977,24 @@ int pmd_clear_huge(pmd_t *pmdp) int pud_free_pmd_page(pud_t *pud) { - return pud_none(*pud); + pmd_t *pmd; + int i; + + pmd = __va(pud_val(*pud)); + if (pud_val(*pud) && !pud_huge(*pud)) { + for (i = 0; i < PTRS_PER_PMD; i++) + pmd_free_pte_page(&pmd[i]); + + free_page((unsigned long)pmd); + } + + return 1; } int pmd_free_pte_page(pmd_t *pmd) { - return pmd_none(*pmd); + if (pmd_val(*pmd) && !pmd_huge(*pmd)) + free_page((unsigned long)__va(pmd_val(*pmd))); + + return 1; } -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project