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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ep2-20020a17090ae64200b002372f2c4d9dsi15330057pjb.44.2023.03.20.10.01.44; Mon, 20 Mar 2023 10:01:58 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=ZYNgxA1r; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232192AbjCTQsO (ORCPT <rfc822;pusanteemu@gmail.com> + 99 others); Mon, 20 Mar 2023 12:48:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231622AbjCTQri (ORCPT <rfc822;linux-kernel@vger.kernel.org>); Mon, 20 Mar 2023 12:47:38 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7ABE7158B0; Mon, 20 Mar 2023 09:41:06 -0700 (PDT) Date: Mon, 20 Mar 2023 16:39:26 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1679330367; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=5cGVY/C5/GTw2QxGZXT/kH59jUc0ASCRsxXTUboMuAU=; b=ZYNgxA1rK8mK6pV5O30zXo0qWp+Xaw6fxlow/i9S2a4oNHYScvg/UHsRZ8UTeB96Ekoo4y 3zDp3kvzOsikd8p/S2xltwWqZKDJ+8Tmte4QkKLxC4ILxHqAdQZOXuSfAK+CWOQ8ESRnV3 xJ+VC+I23bryubQLRJD/amomwlN0oUYaOFlFiLoUK45NMRRX9ICJCust0NNIUhRvpg1FQZ muUkDL2aPMe8rklC3HYnnPJLCWdoLDvdLrSNeos6nyoBqcaDTc69//RA5/KXhDrg4w0fwj dYWevTzKf4LRA3ND4LMFfDv9gzMowmp5iEV+fdO36/akGG4nEXrpru5BEhK9qg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1679330367; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=5cGVY/C5/GTw2QxGZXT/kH59jUc0ASCRsxXTUboMuAU=; b=/CrI3fPHbadDahVN5nGqj/aITu0R5W+yXWdAF903994Z/kdz3EpkdlWKgKrAzyIKy7nIzP 6ihl4fQoLYUF0BDw== From: "tip-bot2 for Yu-cheng Yu" <tip-bot2@linutronix.de> Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/shstk] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Cc: "Yu-cheng Yu" <yu-cheng.yu@intel.com>, Rick Edgecombe <rick.p.edgecombe@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, "Borislav Petkov (AMD)" <bp@alien8.de>, Kees Cook <keescook@chromium.org>, Axel Rasmussen <axelrasmussen@google.com>, "Mike Rapoport (IBM)" <rppt@kernel.org>, Peter Xu <peterx@redhat.com>, Pengfei Xu <pengfei.xu@intel.com>, John Allen <john.allen@amd.com>, x86@kernel.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Message-ID: <167933036663.5837.2737081602720638979.tip-bot2@tip-bot2> Robot-ID: <tip-bot2@linutronix.de> Robot-Unsubscribe: Contact <mailto:tglx@linutronix.de> to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760906935591754464?= X-GMAIL-MSGID: =?utf-8?q?1760906935591754464?= |
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[tip:,x86/shstk] mm: Move VM_UFFD_MINOR_BIT from 37 to 38
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Commit Message
tip-bot2 for Thomas Gleixner
March 20, 2023, 4:39 p.m. UTC
The following commit has been merged into the x86/shstk branch of tip: Commit-ID: 5b541538cd8c86cb3a8f7a049a0b4a4ff1bd462b Gitweb: https://git.kernel.org/tip/5b541538cd8c86cb3a8f7a049a0b4a4ff1bd462b Author: Yu-cheng Yu <yu-cheng.yu@intel.com> AuthorDate: Sat, 18 Mar 2023 17:15:12 -07:00 Committer: Dave Hansen <dave.hansen@linux.intel.com> CommitterDate: Mon, 20 Mar 2023 09:01:09 -07:00 mm: Move VM_UFFD_MINOR_BIT from 37 to 38 The x86 Control-flow Enforcement Technology (CET) feature includes a new type of memory called shadow stack. This shadow stack memory has some unusual properties, which requires some core mm changes to function properly. Future patches will introduce a new VM flag VM_SHADOW_STACK that will be VM_HIGH_ARCH_BIT_5. VM_HIGH_ARCH_BIT_1 through VM_HIGH_ARCH_BIT_4 are bits 32-36, and bit 37 is the unrelated VM_UFFD_MINOR_BIT. For the sake of order, make all VM_HIGH_ARCH_BITs stay together by moving VM_UFFD_MINOR_BIT from 37 to 38. This will allow VM_SHADOW_STACK to be introduced as 37. Co-developed-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Axel Rasmussen <axelrasmussen@google.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Peter Xu <peterx@redhat.com> Tested-by: Pengfei Xu <pengfei.xu@intel.com> Tested-by: John Allen <john.allen@amd.com> Tested-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/all/20230319001535.23210-18-rick.p.edgecombe%40intel.com --- include/linux/mm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h index af65244..a1b31ca 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -377,7 +377,7 @@ extern unsigned int kobjsize(const void *objp); #endif #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR -# define VM_UFFD_MINOR_BIT 37 +# define VM_UFFD_MINOR_BIT 38 # define VM_UFFD_MINOR BIT(VM_UFFD_MINOR_BIT) /* UFFD minor faults */ #else /* !CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */ # define VM_UFFD_MINOR VM_NONE