[01/52] mm: Introduce lm_alias

Message ID	1519633227-29832-2-git-send-email-alex.shi@linaro.org
State	Superseded
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Alex Shi <alex.shi@linaro.org> To: Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Catalin Marinas <catalin.marinas@arm.com>, stable@vger.kernel.org, linux-mm@kvack.org (open list:MEMORY MANAGEMENT), linux-kernel@vger.kernel.org (open list) Cc: Laura Abbott <labbott@redhat.com> Subject: [PATCH 01/52] mm: Introduce lm_alias Date: Mon, 26 Feb 2018 16:19:35 +0800 Message-Id: <1519633227-29832-2-git-send-email-alex.shi@linaro.org> In-Reply-To: <1519633227-29832-1-git-send-email-alex.shi@linaro.org> References: <1519633227-29832-1-git-send-email-alex.shi@linaro.org> Sender: stable-owner@vger.kernel.org Precedence: bulk
Series	[01/52] mm: Introduce lm_alias \| expand [01/52] mm: Introduce lm_alias [06/52] arm64: Factor out PAN enabling/disabling into separate uaccess_* macros [07/52] arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro [20/52] arm64: Run enable method for errata work arounds on late CPUs [21/52] arm64: cpufeature: Pass capability structure to ->enable callback [25/52] arm64: KVM: Use per-CPU vector when BP hardening is enabled [26/52] arm64: entry: Apply BP hardening for high-priority synchronous exceptions [27/52] arm64: entry: Apply BP hardening for suspicious interrupts from EL0 [28/52] arm64: cputype: Add missing MIDR values for Cortex-A72 and Cortex-A75 [30/52] arm64: KVM: Increment PC after handling an SMC trap [33/52] arm/arm64: KVM: Add smccc accessors to PSCI code [34/52] arm/arm64: KVM: Implement PSCI 1.0 support [35/52] arm/arm64: KVM: Advertise SMCCC v1.1 [37/52] arm/arm64: KVM: Turn kvm_psci_version into a static inline [38/52] arm64: KVM: Report SMCCC_ARCH_WORKAROUND_1 BP hardening support [47/52] arm: Invalidate BTB on prefetch abort outside of user mapping on Cortex A8, A9, A12 and A17 [49/52] arm: Add icache invalidation on switch_mm for Cortex-A15 [50/52] arm: Invalidate icache on prefetch abort outside of user mapping on Cortex-A15 [51/52] arm: KVM: Invalidate icache on guest exit for Cortex-A15 [52/52] arm64: Add README describing the branch

Message ID

1519633227-29832-2-git-send-email-alex.shi@linaro.org

State

Superseded

Headers

Received-SPF: pass (google.com: best guess record for domain of
	stable-owner@vger.kernel.org designates 209.132.180.67 as
	permitted sender) client-ip=209.132.180.67; 
From: Alex Shi <alex.shi@linaro.org>
To: Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Catalin Marinas <catalin.marinas@arm.com>, stable@vger.kernel.org,
	linux-mm@kvack.org (open list:MEMORY MANAGEMENT),
	linux-kernel@vger.kernel.org (open list)
Cc: Laura Abbott <labbott@redhat.com>
Subject: [PATCH 01/52] mm: Introduce lm_alias
Date: Mon, 26 Feb 2018 16:19:35 +0800
Message-Id: <1519633227-29832-2-git-send-email-alex.shi@linaro.org>
In-Reply-To: <1519633227-29832-1-git-send-email-alex.shi@linaro.org>
References: <1519633227-29832-1-git-send-email-alex.shi@linaro.org>
Sender: stable-owner@vger.kernel.org
Precedence: bulk

Series

[01/52] mm: Introduce lm_alias | expand

Commit Message

Alex Shi Feb. 26, 2018, 8:19 a.m. UTC

From: Laura Abbott <labbott@redhat.com>


commit 568c5fe5a54 upstream.

Certain architectures may have the kernel image mapped separately to
alias the linear map. Introduce a macro lm_alias to translate a kernel
image symbol into its linear alias. This is used in part with work to
add CONFIG_DEBUG_VIRTUAL support for arm64.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>

Tested-by: Mark Rutland <mark.rutland@arm.com>

Signed-off-by: Laura Abbott <labbott@redhat.com>

Signed-off-by: Will Deacon <will.deacon@arm.com>

Signed-off-by: Alex Shi <alex.shi@linaro.org>

---
 include/linux/mm.h | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.7.4

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2217e2f..edd2480 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -76,6 +76,10 @@  extern int mmap_rnd_compat_bits __read_mostly;
 #define page_to_virt(x)	__va(PFN_PHYS(page_to_pfn(x)))
 #endif
 
+#ifndef lm_alias
+#define lm_alias(x)	__va(__pa_symbol(x))
+#endif
+
 /*
  * To prevent common memory management code establishing
  * a zero page mapping on a read fault.

[01/52] mm: Introduce lm_alias

Commit Message

Patch