From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47188 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725846AbfGLFlO (ORCPT ); Fri, 12 Jul 2019 01:41:14 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6C5aQEO013077 for ; Fri, 12 Jul 2019 01:41:12 -0400 Received: from e12.ny.us.ibm.com (e12.ny.us.ibm.com [129.33.205.202]) by mx0a-001b2d01.pphosted.com with ESMTP id 2tpj07mb1h-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 12 Jul 2019 01:41:12 -0400 Received: from localhost by e12.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 12 Jul 2019 06:41:11 +0100 From: Thiago Jung Bauermann Subject: [PATCH 0/3] Remove x86-specific code from generic headers Date: Fri, 12 Jul 2019 02:36:28 -0300 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20190712053631.9814-1-bauerman@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: x86@kernel.org Cc: iommu@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Konrad Rzeszutek Wilk , Alexey Dobriyan , Halil Pasic , Mike Anderson , Ram Pai , Thiago Jung Bauermann Hello, Both powerpc¹ and s390² are adding headers. Currently, they have to supply definitions for functions and macros which only have a meaning on x86: sme_me_mask, sme_active() and sev_active(). Christoph Hellwig made a suggestion to "clean up the Kconfig and generic headers bits for memory encryption so that we don't need all this boilerplate code", and this is what this series does. After this patch set, this is powerpc's : #ifndef _ASM_POWERPC_MEM_ENCRYPT_H #define _ASM_POWERPC_MEM_ENCRYPT_H #include static inline bool mem_encrypt_active(void) { return is_secure_guest(); } static inline bool force_dma_unencrypted(struct device *dev) { return is_secure_guest(); } int set_memory_encrypted(unsigned long addr, int numpages); int set_memory_decrypted(unsigned long addr, int numpages); #endif /* _ASM_POWERPC_MEM_ENCRYPT_H */ I don't have a way to test SME nor SEV, so the patches have only been build tested. They assume the presence of the following two commits: Commit 4eb5fec31e61 ("fs/proc/vmcore: Enable dumping of encrypted memory when SEV was active"), which is now in Linus' master branch; Commit e67a5ed1f86f ("dma-direct: Force unencrypted DMA under SME for certain DMA masks"), which is in dma-mapping/for-next and comes from this patch: https://lore.kernel.org/linux-iommu/10b83d9ff31bca88e94da2ff34e30619eb396078.1562785123.git.thomas.lendacky@amd.com/ Thiago Jung Bauermann (3): x86/Kconfig: Move ARCH_HAS_MEM_ENCRYPT to arch/Kconfig DMA mapping: Move SME handling to x86-specific files fs/core/vmcore: Move sev_active() reference to x86 arch code arch/Kconfig | 3 +++ arch/x86/Kconfig | 5 ++--- arch/x86/include/asm/dma-mapping.h | 7 +++++++ arch/x86/include/asm/mem_encrypt.h | 10 ++++++++++ arch/x86/kernel/crash_dump_64.c | 5 +++++ fs/proc/vmcore.c | 8 ++++---- include/linux/crash_dump.h | 14 ++++++++++++++ include/linux/mem_encrypt.h | 15 +-------------- kernel/dma/Kconfig | 3 +++ kernel/dma/mapping.c | 4 ++-- kernel/dma/swiotlb.c | 3 +-- 11 files changed, 52 insertions(+), 25 deletions(-) -- ¹ https://lore.kernel.org/linuxppc-dev/20190521044912.1375-12-bauerman@linux.ibm.com/ ² https://lore.kernel.org/kvm/20190612111236.99538-2-pasic@linux.ibm.com/