From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f48.google.com (mail-wm0-f48.google.com [74.125.82.48]) by kanga.kvack.org (Postfix) with ESMTP id D80AF6B025D for ; Mon, 30 Nov 2015 07:29:34 -0500 (EST) Received: by wmvv187 with SMTP id v187so154095813wmv.1 for ; Mon, 30 Nov 2015 04:29:34 -0800 (PST) Received: from mail-wm0-x229.google.com (mail-wm0-x229.google.com. [2a00:1450:400c:c09::229]) by mx.google.com with ESMTPS id hf9si66313111wjc.36.2015.11.30.04.29.33 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Nov 2015 04:29:33 -0800 (PST) Received: by wmvv187 with SMTP id v187so154095236wmv.1 for ; Mon, 30 Nov 2015 04:29:33 -0800 (PST) From: Ard Biesheuvel Subject: [PATCH v4 10/13] ARM: implement create_mapping_late() for EFI use Date: Mon, 30 Nov 2015 13:28:24 +0100 Message-Id: <1448886507-3216-11-git-send-email-ard.biesheuvel@linaro.org> In-Reply-To: <1448886507-3216-1-git-send-email-ard.biesheuvel@linaro.org> References: <1448886507-3216-1-git-send-email-ard.biesheuvel@linaro.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will.deacon@arm.com, mark.rutland@arm.com, linux-efi@vger.kernel.org, leif.lindholm@linaro.org, matt@codeblueprint.co.uk, linux@arm.linux.org.uk Cc: akpm@linux-foundation.org, kuleshovmail@gmail.com, linux-mm@kvack.org, ryan.harkin@linaro.org, grant.likely@linaro.org, roy.franz@linaro.org, msalter@redhat.com, Ard Biesheuvel This implements create_mapping_late(), which we will use to populate the UEFI Runtime Services page tables. Tested-by: Ryan Harkin Reviewed-by: Matt Fleming Signed-off-by: Ard Biesheuvel --- arch/arm/include/asm/mach/map.h | 2 ++ arch/arm/mm/mmu.c | 20 ++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h index f98c7f32c9c8..9b7c328fb207 100644 --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -42,6 +42,8 @@ enum { extern void iotable_init(struct map_desc *, int); extern void vm_reserve_area_early(unsigned long addr, unsigned long size, void *caller); +extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md, + bool ng); #ifdef CONFIG_DEBUG_LL extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr); diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 2d9f628a7fe8..8c69830e791a 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -724,6 +724,14 @@ static void __init *early_alloc(unsigned long sz) return early_alloc_aligned(sz, sz); } +static void *__init late_alloc(unsigned long sz) +{ + void *ptr = (void *)__get_free_pages(PGALLOC_GFP, get_order(sz)); + + BUG_ON(!ptr); + return ptr; +} + static pte_t * __init pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot, void *(*alloc)(unsigned long sz)) @@ -960,6 +968,18 @@ static void __init create_mapping(struct map_desc *md) __create_mapping(&init_mm, md, early_alloc, false); } +void __init create_mapping_late(struct mm_struct *mm, struct map_desc *md, + bool ng) +{ +#ifdef CONFIG_ARM_LPAE + pud_t *pud = pud_alloc(mm, pgd_offset(mm, md->virtual), md->virtual); + if (WARN_ON(!pud)) + return; + pmd_alloc(mm, pud, 0); +#endif + __create_mapping(mm, md, late_alloc, ng); +} + /* * Create the architecture specific mappings */ -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org