From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) by kanga.kvack.org (Postfix) with ESMTP id 810B66B000E for ; Wed, 14 Nov 2018 08:39:46 -0500 (EST) Received: by mail-oi1-f198.google.com with SMTP id n196so4772398oig.15 for ; Wed, 14 Nov 2018 05:39:46 -0800 (PST) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id t53si9828697oti.205.2018.11.14.05.39.45 for ; Wed, 14 Nov 2018 05:39:45 -0800 (PST) From: Steve Capper Subject: [PATCH V3 3/5] arm64: mm: Define arch_get_mmap_end, arch_get_mmap_base Date: Wed, 14 Nov 2018 13:39:18 +0000 Message-Id: <20181114133920.7134-4-steve.capper@arm.com> In-Reply-To: <20181114133920.7134-1-steve.capper@arm.com> References: <20181114133920.7134-1-steve.capper@arm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will.deacon@arm.com, ard.biesheuvel@linaro.org, jcm@redhat.com, Steve Capper Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end and arch_get_mmap_base helpers to allow for high addresses in mmap. Signed-off-by: Steve Capper --- arch/arm64/include/asm/processor.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index da41a2655b69..bbe602cb8fd3 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -72,6 +72,13 @@ #define STACK_TOP STACK_TOP_MAX #endif /* CONFIG_COMPAT */ +#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\ + DEFAULT_MAP_WINDOW) + +#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \ + base + TASK_SIZE - DEFAULT_MAP_WINDOW :\ + base) + extern phys_addr_t arm64_dma_phys_limit; #define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1) -- 2.11.0