From nobody Mon Dec 23 11:07:23 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) smtp.mailfrom=edk2-devel-bounces@lists.01.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from ml01.01.org (ml01.01.org [198.145.21.10]) by mx.zohomail.com with SMTPS id 1519949071232191.46048037612115; Thu, 1 Mar 2018 16:04:31 -0800 (PST) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 52CA322546B90; Thu, 1 Mar 2018 15:58:13 -0800 (PST) Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id D1A98224E692B for ; Thu, 1 Mar 2018 15:58:11 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2BA76410FBA1; Fri, 2 Mar 2018 00:04:20 +0000 (UTC) Received: from lacos-laptop-7.usersys.redhat.com (ovpn-120-4.rdu2.redhat.com [10.10.120.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 45FFE10B0F24; Fri, 2 Mar 2018 00:04:19 +0000 (UTC) X-Original-To: edk2-devel@lists.01.org Received-SPF: none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) client-ip=198.145.21.10; envelope-from=edk2-devel-bounces@lists.01.org; helo=ml01.01.org; Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=66.187.233.73; helo=mx1.redhat.com; envelope-from=lersek@redhat.com; receiver=edk2-devel@lists.01.org From: Laszlo Ersek To: edk2-devel-01 Date: Fri, 2 Mar 2018 01:03:53 +0100 Message-Id: <20180302000408.14201-6-lersek@redhat.com> In-Reply-To: <20180302000408.14201-1-lersek@redhat.com> References: <20180302000408.14201-1-lersek@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Fri, 02 Mar 2018 00:04:20 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Fri, 02 Mar 2018 00:04:20 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'lersek@redhat.com' RCPT:'' Subject: [edk2] [PATCH 05/20] OvmfPkg/MemEncryptSevLib: clean up SetMemoryEncDec() comment block X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jordan Justen , Brijesh Singh , Ard Biesheuvel MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Errors-To: edk2-devel-bounces@lists.01.org Sender: "edk2-devel" X-ZohoMail: RSF_4 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Document the "Cr3BaseAddress" parameter, and correct several parameter references. Cc: Ard Biesheuvel Cc: Brijesh Singh Cc: Jordan Justen Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek --- OvmfPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.c b/Ovm= fPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.c index 65b8babaac44..aed92127629f 100644 --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.c +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.c @@ -531,55 +531,57 @@ DisableReadOnlyPageWriteProtect ( VOID ) { AsmWriteCr0 (AsmReadCr0() & ~BIT16); } =20 /** Enable Write Protect on pages marked as read-only. **/ VOID EnableReadOnlyPageWriteProtect ( VOID ) { AsmWriteCr0 (AsmReadCr0() | BIT16); } =20 =20 /** This function either sets or clears memory encryption bit for the memory - region specified by PhysicalAddress and length from the current page tab= le + region specified by PhysicalAddress and Length from the current page tab= le context. =20 - The function iterates through the physicalAddress one page at a time, an= d set + The function iterates through the PhysicalAddress one page at a time, an= d set or clears the memory encryption mask in the page table. If it encounters that a given physical address range is part of large page then it attemp= ts to change the attribute at one go (based on size), otherwise it splits the large pages into smaller (e.g 2M page into 4K pages) and then try to set= or clear the encryption bit on the smallest page size. =20 + @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use + current CR3) @param[in] PhysicalAddress The physical address that is the sta= rt address of a memory region. @param[in] Length The length of memory region @param[in] Mode Set or Clear mode - @param[in] Flush Flush the caches before applying the + @param[in] CacheFlush Flush the caches before applying the encryption mask =20 @retval RETURN_SUCCESS The attributes were cleared for the memory region. @retval RETURN_INVALID_PARAMETER Number of pages is zero. @retval RETURN_UNSUPPORTED Setting the memory encyrption attrib= ute is not supported **/ =20 STATIC RETURN_STATUS EFIAPI SetMemoryEncDec ( IN PHYSICAL_ADDRESS Cr3BaseAddress, IN PHYSICAL_ADDRESS PhysicalAddress, IN UINTN Length, IN MAP_RANGE_MODE Mode, IN BOOLEAN CacheFlush ) { --=20 2.14.1.3.gb7cf6e02401b _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel