From patchwork Thu Mar 12 04:10:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhenyu Ye X-Patchwork-Id: 11433193 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0470A913 for ; Thu, 12 Mar 2020 04:11:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B453E206F2 for ; Thu, 12 Mar 2020 04:11:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j8F9Dnhm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B453E206F2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+WsxSsxtxNg8kIi0bh02tl9eTNPY4TB5/ObUyhQrNTQ=; b=j8F9DnhmSHq8TW 7+OoHzSPFkELEt0kUG+gjbsxQ9MYijQpjpjm95zLIGCmgVE8XWt7HUHbLt839NsoIB5ntW38He8ri aLlHF+lgUltqXj9ESpyAVWUKL2biBakPW8/eH57GvMpjClvx+ITJmOAiiJZ1vNH3tk8nwQSRdNw0E br6L7pe15y48fM89CQkL20XkfUiOd+DCpjntOUH0XwfxpvzpJU7QAjdJYBcGm2FgJpzRFSX5ZP9Q2 FtI0Mi4v+7WHAuruoCbZo8x25l2ZimiIVMTXPSRHN5GcCJ5Haa4NFL3TnT9wbbpUjaUvW+SVGPjEW nl1RPFBr39HvG7PS+umg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jCFC3-0003sp-JA; Thu, 12 Mar 2020 04:11:35 +0000 Received: from szxga07-in.huawei.com ([45.249.212.35] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jCFBG-00037Y-04 for linux-arm-kernel@lists.infradead.org; Thu, 12 Mar 2020 04:10:49 +0000 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id A9DD3C064D0E03BC613E; Thu, 12 Mar 2020 12:10:36 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.173.220.25) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Thu, 12 Mar 2020 12:10:27 +0800 From: Zhenyu Ye To: , , , , , , , Subject: [RFC PATCH v2 2/3] arm64: tlb: use mm_struct.context.flags to indicate TTL value Date: Thu, 12 Mar 2020 12:10:17 +0800 Message-ID: <20200312041018.1927-3-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200312041018.1927-1-yezhenyu2@huawei.com> References: <20200312041018.1927-1-yezhenyu2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.173.220.25] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200311_211046_611556_2BE69877 X-CRM114-Status: GOOD ( 11.20 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [45.249.212.35 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, yezhenyu2@huawei.com, linux-kernel@vger.kernel.org, xiexiangyou@huawei.com, zhangshaokun@hisilicon.com, linux-mm@kvack.org, arm@kernel.org, prime.zeng@hisilicon.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Use Architecture-specific MM context to indicate the level of page table walk. This avoids lots of changes to common-interface. Signed-off-by: Zhenyu Ye --- arch/arm64/include/asm/mmu.h | 11 +++++++++++ arch/arm64/include/asm/tlbflush.h | 6 +++--- arch/arm64/kernel/process.c | 2 +- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index e4d862420bb4..f86a38ab3632 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -8,6 +8,10 @@ #include #define MMCF_AARCH32 0x1 /* mm context flag for AArch32 executables */ +#define S1_PUD_LEVEL 0x10 /* mm context flag for the level of ptw */ +#define S1_PMD_LEVEL 0x20 +#define S1_PTE_LEVEL 0x30 + #define USER_ASID_BIT 48 #define USER_ASID_FLAG (UL(1) << USER_ASID_BIT) #define TTBR_ASID_MASK (UL(0xffff) << 48) @@ -19,6 +23,10 @@ typedef struct { atomic64_t id; void *vdso; + /* + * flags[3:0]: AArch32 executables + * flags[7:4]: the level of page table walk + */ unsigned long flags; } mm_context_t; @@ -29,6 +37,9 @@ typedef struct { */ #define ASID(mm) ((mm)->context.id.counter & 0xffff) +/* This macro is only used by TLBI TTL */ +#define TLBI_LEVEL(mm) ((mm)->context.flags >> 4 & 0xf) + extern bool arm64_use_ng_mappings; static inline bool arm64_kernel_unmapped_at_el0(void) diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h index dda693f32099..312b9edb281b 100644 --- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -186,7 +186,7 @@ static inline void flush_tlb_page_nosync(struct vm_area_struct *vma, unsigned long addr = __TLBI_VADDR(uaddr, ASID(vma->vm_mm)); dsb(ishst); - __tlbi_level(vale1is, addr, 0); + __tlbi_level(vale1is, addr, TLBI_LEVEL(vma->vm_mm)); } static inline void flush_tlb_page(struct vm_area_struct *vma, @@ -226,9 +226,9 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma, dsb(ishst); for (addr = start; addr < end; addr += stride) { if (last_level) { - __tlbi_level(vale1is, addr, 0); + __tlbi_level(vale1is, addr, TLBI_LEVEL(vma->vm_mm)); } else { - __tlbi_level(vae1is, addr, 0); + __tlbi_level(vae1is, addr, TLBI_LEVEL(vma->vm_mm)); } } dsb(ish); diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index bbb0f0c145f6..bf835755d9ed 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -562,7 +562,7 @@ unsigned long arch_align_stack(unsigned long sp) */ void arch_setup_new_exec(void) { - current->mm->context.flags = is_compat_task() ? MMCF_AARCH32 : 0; + current->mm->context.flags |= is_compat_task() ? MMCF_AARCH32 : 0; ptrauth_thread_init_user(current); }