From patchwork Thu Jun 30 05:16:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12901100 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C0AACCA483 for ; Thu, 30 Jun 2022 05:18:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232585AbiF3FSH (ORCPT ); Thu, 30 Jun 2022 01:18:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232442AbiF3FRm (ORCPT ); Thu, 30 Jun 2022 01:17:42 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 361AE3A181; Wed, 29 Jun 2022 22:17:39 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2BB3F169C; Wed, 29 Jun 2022 22:17:39 -0700 (PDT) Received: from a077893.blr.arm.com (unknown [10.162.41.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 99ED63F66F; Wed, 29 Jun 2022 22:17:30 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: hch@infradead.org, christophe.leroy@csgroup.eu, Anshuman Khandual , linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org, openrisc@lists.librecores.org, linux-xtensa@linux-xtensa.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-parisc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-um@lists.infradead.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Christoph Hellwig Subject: [PATCH V6 06/26] x86/mm: Move protection_map[] inside the platform Date: Thu, 30 Jun 2022 10:46:10 +0530 Message-Id: <20220630051630.1718927-7-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220630051630.1718927-1-anshuman.khandual@arm.com> References: <20220630051630.1718927-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org This moves protection_map[] inside the platform and makes it a static. This also defines a helper function add_encrypt_protection_map() that can update the protection_map[] array with pgprot_encrypted(). Cc: Thomas Gleixner Cc: Ingo Molnar Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Christoph Hellwig Signed-off-by: Anshuman Khandual --- arch/x86/include/asm/pgtable_types.h | 19 ------------------- arch/x86/mm/mem_encrypt_amd.c | 7 +++---- arch/x86/mm/pgprot.c | 27 +++++++++++++++++++++++++++ 3 files changed, 30 insertions(+), 23 deletions(-) diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index bdaf8391e2e0..aa174fed3a71 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -230,25 +230,6 @@ enum page_cache_mode { #endif /* __ASSEMBLY__ */ -/* xwr */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_EXEC -#define __P101 PAGE_READONLY_EXEC -#define __P110 PAGE_COPY_EXEC -#define __P111 PAGE_COPY_EXEC - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_EXEC -#define __S101 PAGE_READONLY_EXEC -#define __S110 PAGE_SHARED_EXEC -#define __S111 PAGE_SHARED_EXEC - /* * early identity mapping pte attrib macros. */ diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index f6d038e2cd8e..4b3ec87e8c7d 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -484,10 +484,10 @@ void __init early_set_mem_enc_dec_hypercall(unsigned long vaddr, int npages, boo enc_dec_hypercall(vaddr, npages, enc); } +void add_encrypt_protection_map(void); + void __init sme_early_init(void) { - unsigned int i; - if (!sme_me_mask) return; @@ -496,8 +496,7 @@ void __init sme_early_init(void) __supported_pte_mask = __sme_set(__supported_pte_mask); /* Update the protection map with memory encryption mask */ - for (i = 0; i < ARRAY_SIZE(protection_map); i++) - protection_map[i] = pgprot_encrypted(protection_map[i]); + add_encrypt_protection_map(); x86_platform.guest.enc_status_change_prepare = amd_enc_status_change_prepare; x86_platform.guest.enc_status_change_finish = amd_enc_status_change_finish; diff --git a/arch/x86/mm/pgprot.c b/arch/x86/mm/pgprot.c index 763742782286..b867839b16aa 100644 --- a/arch/x86/mm/pgprot.c +++ b/arch/x86/mm/pgprot.c @@ -4,6 +4,33 @@ #include #include +static pgprot_t protection_map[16] __ro_after_init = { + [VM_NONE] = PAGE_NONE, + [VM_READ] = PAGE_READONLY, + [VM_WRITE] = PAGE_COPY, + [VM_WRITE | VM_READ] = PAGE_COPY, + [VM_EXEC] = PAGE_READONLY_EXEC, + [VM_EXEC | VM_READ] = PAGE_READONLY_EXEC, + [VM_EXEC | VM_WRITE] = PAGE_COPY_EXEC, + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_EXEC, + [VM_SHARED] = PAGE_NONE, + [VM_SHARED | VM_READ] = PAGE_READONLY, + [VM_SHARED | VM_WRITE] = PAGE_SHARED, + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED, + [VM_SHARED | VM_EXEC] = PAGE_READONLY_EXEC, + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_EXEC, + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED_EXEC, + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_EXEC +}; + +void add_encrypt_protection_map(void) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(protection_map); i++) + protection_map[i] = pgprot_encrypted(protection_map[i]); +} + pgprot_t vm_get_page_prot(unsigned long vm_flags) { unsigned long val = pgprot_val(protection_map[vm_flags &