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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=V8Xuh8uPnnLxOiVNiwLjLFxuzBpy6trzUPCuAOE2xx0=; b=cztdknr25dix2Rkq1yXF8/qWjyYjXNII/1cOlQKDg8XCGzN2GNm1huZzf7jvCt+Eyq gnx/cI7/ia/1FJg/cp3dOHnAiK4l83UlZ32Pb6+yoE87UhHJcimijp2+ey7RqEJyflVj gf2+2dOuyggX2ib6ZVHOzhrGJ9eXtIWxVLDcFOMuvGKfk59Gg0FsIQ/UB56i5oV23hxl 63OF1o0HwQ/pti50ndUhuKY7TCTOeMCFrEXgsOtK/WYU5orq/iKyw+O98MJm7Nb9GA0G wnoRhxkhA+qftHBAxkiV7sfs5djcVJ86HPtEpurnd/FEu2yICvlK1ek3ecATwS0v+XPV wu+w== X-Gm-Message-State: AOAM533Y4NMlEBULTalVIRXpBMaJAFu2k26d3zInrRt0X9ZiDUwOanh2 fZGs8y8CgaAjnuw+sss6YiBSbVv5PqtU X-Google-Smtp-Source: ABdhPJzR1b4aR6QaQ60ISv7IHqOCyLzBmRTfzqmQXTTEq7n/TXFLvP84XEuBt+n493T0JhKm+QtbDMICVRWV X-Received: from r2d2-qp.c.googlers.com ([fda3:e722:ac3:10:28:9cb1:c0a8:1652]) (user=qperret job=sendgmr) by 2002:a7b:c750:: with SMTP id w16mr9005wmk.184.1615818942004; Mon, 15 Mar 2021 07:35:42 -0700 (PDT) Date: Mon, 15 Mar 2021 14:35:01 +0000 In-Reply-To: <20210315143536.214621-1-qperret@google.com> Message-Id: <20210315143536.214621-2-qperret@google.com> Mime-Version: 1.0 References: <20210315143536.214621-1-qperret@google.com> X-Mailer: git-send-email 2.31.0.rc2.261.g7f71774620-goog Subject: [PATCH v5 01/36] arm64: lib: Annotate {clear, copy}_page() as position-independent From: Quentin Perret To: catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com Cc: android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com, qperret@google.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210315_143543_593107_EA425354 X-CRM114-Status: UNSURE ( 9.78 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Will Deacon clear_page() and copy_page() are suitable for use outside of the kernel address space, so annotate them as position-independent code. Signed-off-by: Will Deacon Signed-off-by: Quentin Perret --- arch/arm64/lib/clear_page.S | 4 ++-- arch/arm64/lib/copy_page.S | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/lib/clear_page.S b/arch/arm64/lib/clear_page.S index 073acbf02a7c..b84b179edba3 100644 --- a/arch/arm64/lib/clear_page.S +++ b/arch/arm64/lib/clear_page.S @@ -14,7 +14,7 @@ * Parameters: * x0 - dest */ -SYM_FUNC_START(clear_page) +SYM_FUNC_START_PI(clear_page) mrs x1, dczid_el0 and w1, w1, #0xf mov x2, #4 @@ -25,5 +25,5 @@ SYM_FUNC_START(clear_page) tst x0, #(PAGE_SIZE - 1) b.ne 1b ret -SYM_FUNC_END(clear_page) +SYM_FUNC_END_PI(clear_page) EXPORT_SYMBOL(clear_page) diff --git a/arch/arm64/lib/copy_page.S b/arch/arm64/lib/copy_page.S index e7a793961408..29144f4cd449 100644 --- a/arch/arm64/lib/copy_page.S +++ b/arch/arm64/lib/copy_page.S @@ -17,7 +17,7 @@ * x0 - dest * x1 - src */ -SYM_FUNC_START(copy_page) +SYM_FUNC_START_PI(copy_page) alternative_if ARM64_HAS_NO_HW_PREFETCH // Prefetch three cache lines ahead. prfm pldl1strm, [x1, #128] @@ -75,5 +75,5 @@ alternative_else_nop_endif stnp x16, x17, [x0, #112 - 256] ret -SYM_FUNC_END(copy_page) +SYM_FUNC_END_PI(copy_page) EXPORT_SYMBOL(copy_page)