From patchwork Tue Mar 24 13:45:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhenyu Ye X-Patchwork-Id: 11455469 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 B3F0992A for ; Tue, 24 Mar 2020 13:46:35 +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 67CE52076E for ; Tue, 24 Mar 2020 13:46:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="m8Kv7O83" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67CE52076E 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=RYFFaL8xXm1BrM4PYGCx/TbbYVoX58C/CUs6d9qotjY=; b=m8Kv7O83d0wtOt Cp9+0WjGkTNcYwLPDYH9oOyQ8H4dVxZwCznxaHA1gPrPENLR7tHbYXf0/Gi6Z6pO4bF84sfICv748 vqGFh5KSH+kA0xQ6pCWvMnImnawMrKt9/ZUjcNMTIaGHVYffhWHn1L//8u+g/P77L9KJXGxCcXrKx U5LNJ/ZcySCacUWGorjmBDVVFYGVgaYp+01DZUIzjvd9N6FexqOX8+ekh34i2mtuE4cmxW05LY+Hu XXV7NSTLkbSq9E3J2eUVottRnHRcA9j6OnMq0uAhU0IKWCc+1lYVXjfx95yHPuqt5KfI47Ee4Rpw1 /AY5pCgvlZsC35tTX/7Q==; 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 1jGjsz-0006pz-CI; Tue, 24 Mar 2020 13:46:29 +0000 Received: from szxga06-in.huawei.com ([45.249.212.32] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGjsk-0006cR-O3 for linux-arm-kernel@lists.infradead.org; Tue, 24 Mar 2020 13:46:16 +0000 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 5368CAA17414541C128E; Tue, 24 Mar 2020 21:46:11 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.173.220.25) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Tue, 24 Mar 2020 21:46:04 +0800 From: Zhenyu Ye To: , , , , , , , , , , , , , , , , Subject: [RFC PATCH v4 4/6] mm: Add page table level flags to vm_flags Date: Tue, 24 Mar 2020 21:45:32 +0800 Message-ID: <20200324134534.1570-5-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200324134534.1570-1-yezhenyu2@huawei.com> References: <20200324134534.1570-1-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-20200324_064614_946830_9B71887E X-CRM114-Status: GOOD ( 10.93 ) 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 [45.249.212.32 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 Add VM_LEVEL_[PUD|PMD|PTE] to vm_flags to indicate which level of the page tables the vma is in. Those flags can be used to reduce the cost of TLB invalidation. These should be common flags for all architectures, however, those flags are only available in 64-bits system currently, because the lower-order flags are fully used. These flags are only used by ARM64 architecture now. See in next patch. Signed-off-by: Zhenyu Ye --- include/linux/mm.h | 10 ++++++++++ include/trace/events/mmflags.h | 15 ++++++++++++++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index c54fb96cb1e6..3ff16ffa5e83 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -313,6 +313,16 @@ extern unsigned int kobjsize(const void *objp); #endif #endif /* CONFIG_ARCH_HAS_PKEYS */ +#ifdef CONFIG_64BIT +# define VM_LEVEL_PUD BIT(37) /* vma is in pud-level of page table */ +# define VM_LEVEL_PMD BIT(38) /* vma is in pmd-level of page table */ +# define VM_LEVEL_PTE BIT(39) /* vma is in pte-level of page table */ +#else +# define VM_LEVEL_PUD 0 +# define VM_LEVEL_PMD 0 +# define VM_LEVEL_PTE 0 +#endif /* CONFIG_64BIT */ + #if defined(CONFIG_X86) # define VM_PAT VM_ARCH_1 /* PAT reserves whole VMA at once (x86) */ #elif defined(CONFIG_PPC) diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index a1675d43777e..9f13cfa96f9f 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -130,6 +130,16 @@ IF_HAVE_PG_IDLE(PG_idle, "idle" ) #define IF_HAVE_VM_SOFTDIRTY(flag,name) #endif +#ifdef CONFIG_64BIT +#define IF_HAVE_VM_LEVEL_PUD(flag,name) {flag, name} +#define IF_HAVE_VM_LEVEL_PMD(flag,name) {flag, name} +#define IF_HAVE_VM_LEVEL_PTE(flag,name) {flag, name} +#else +#define IF_HAVE_VM_LEVEL_PUD(flag,name) +#define IF_HAVE_VM_LEVEL_PMD(flag,name) +#define IF_HAVE_VM_LEVEL_PTE(flag,name) +#endif + #define __def_vmaflag_names \ {VM_READ, "read" }, \ {VM_WRITE, "write" }, \ @@ -161,7 +171,10 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ {VM_MIXEDMAP, "mixedmap" }, \ {VM_HUGEPAGE, "hugepage" }, \ {VM_NOHUGEPAGE, "nohugepage" }, \ - {VM_MERGEABLE, "mergeable" } \ + {VM_MERGEABLE, "mergeable" }, \ +IF_HAVE_VM_LEVEL_PUD(VM_LEVEL_PUD, "pud-level" ), \ +IF_HAVE_VM_LEVEL_PMD(VM_LEVEL_PMD, "pmd-level" ), \ +IF_HAVE_VM_LEVEL_PTE(VM_LEVEL_PTE, "pte-level" ) \ #define show_vma_flags(flags) \ (flags) ? __print_flags(flags, "|", \