From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 02/10] arm64: introduce __kimg_to_phys() and __pa_symbol()
Date: Mon, 22 Feb 2016 21:54:24 +0100 [thread overview]
Message-ID: <1456174472-30028-3-git-send-email-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <1456174472-30028-1-git-send-email-ard.biesheuvel@linaro.org>
Before restricting the domain of __pa()'s argument to the linear mapping,
introduce alternatives __kimg_to_phys() and its alias __pa_symbol() [of
which the latter exists on x86 as well] that can be used to obtain the
physical address of a static object or function in the kernel text.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm64/include/asm/memory.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 2296b32130a1..56d6739430f3 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -92,7 +92,10 @@
(__x - kimage_voffset); })
#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET)
+
+#define __kimg_to_phys(x) ((phys_addr_t)(x) - kimage_voffset)
#define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset))
+#define __pa_symbol(x) __kimg_to_phys(x)
/*
* Convert a page to/from a physical address
--
2.5.0
next prev parent reply other threads:[~2016-02-22 20:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-22 20:54 [RFC PATCH 00/10] arm64: restrict __pa translation to linear virtual addresses Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 01/10] arm64: mm: move assignment of 'high_memory' before its first use Ard Biesheuvel
2016-02-23 12:14 ` Catalin Marinas
2016-02-23 12:18 ` Ard Biesheuvel
2016-02-22 20:54 ` Ard Biesheuvel [this message]
2016-02-22 20:54 ` [RFC PATCH 03/10] arm64: mm: avoid __pa translations in cpu_replace_ttbr1 Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 04/10] arm64: mm: avoid __pa translations on empty_zero_page Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 05/10] arm64: mm: avoid __pa translations in early_fixmap_init Ard Biesheuvel
2016-02-23 17:12 ` Catalin Marinas
2016-02-23 17:16 ` Ard Biesheuvel
2016-02-23 17:26 ` Catalin Marinas
2016-02-23 17:27 ` Ard Biesheuvel
2016-02-23 17:32 ` Catalin Marinas
2016-02-23 17:43 ` Ard Biesheuvel
2016-02-23 18:10 ` Catalin Marinas
2016-02-22 20:54 ` [RFC PATCH 06/10] arm64: mm: use __pa_symbol() not __pa() for section boundary symbols Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 07/10] arm64: mm: avoid __pa translations for idmap_pg_dir and swapper_pg_dir Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 08/10] arm64: vdso: avoid __pa translations Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 09/10] arm64: insn: " Ard Biesheuvel
2016-02-22 20:54 ` [RFC PATCH 10/10] arm64: mm: restrict __pa() translations to linear virtual addresses Ard Biesheuvel
2016-02-23 12:26 ` Will Deacon
2016-02-23 12:29 ` Ard Biesheuvel
2016-02-23 12:31 ` Will Deacon
2016-02-23 17:22 ` Catalin Marinas
2016-02-23 10:03 ` [RFC PATCH 00/10] arm64: restrict __pa translation " Ard Biesheuvel
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