From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBC8FC56202 for ; Wed, 4 Nov 2020 18:36:57 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 4D17421527 for ; Wed, 4 Nov 2020 18:36:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="pwS+yO9a" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4D17421527 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C0E1C4B6D6; Wed, 4 Nov 2020 13:36:56 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1Ogf6Stzdbtc; Wed, 4 Nov 2020 13:36:55 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id A61FA4B7B9; Wed, 4 Nov 2020 13:36:55 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 8BA014B7B8 for ; Wed, 4 Nov 2020 13:36:53 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Xhofo1eyMrJm for ; Wed, 4 Nov 2020 13:36:52 -0500 (EST) Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 781AC4B6A3 for ; Wed, 4 Nov 2020 13:36:52 -0500 (EST) Received: by mail-wm1-f67.google.com with SMTP id d142so3349807wmd.4 for ; Wed, 04 Nov 2020 10:36:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=/4FeYdmn3iB0IXLNt/H1CXu0UQ9fwGLnFLDS+u9FzHI=; b=pwS+yO9awK8oUBpQAVkLJuj63BH/WHRSAh1203sKJMLPgu/Z7WrtlqDJagBVCYrBaf EOF4SKuIVhlxAqijYs3lo1YFAo8JMGNuT2vGkFPRX2iSDKwMvMACiSGWDwM6hRJ50W30 rsJicMhiC6OYQ/2/CIUPbdAdRQpWJXMwejJYSsKhgwDaIDaZLSG1v9QGvqOLA1ErGg9d Iq0FStkmxGam8BquTREXKbmimi0koGzmcK9fr4eliQyQiNZJD/2xQZ2zt3TcJYss/+q2 PU8oK7Fyq8/xDdNN+GYMONZ2wzMa7EPpgD5F7CCcwZhZwvFOGbR9o6UrjPcEJN2uVbhb VRzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/4FeYdmn3iB0IXLNt/H1CXu0UQ9fwGLnFLDS+u9FzHI=; b=Yro/f0oDDN42/IeUJb8dwjgKBCw3O2MSKhrLQ/RFuf5+gzR60O57m8DoaVEl3lIt0k 3PVrdoc/C/z+nEI4gR+kgZemPx7l+iVOW7oPHoq8V4MKXNprUuw7Qo/tZ/EUVKTtFiOJ u2bA9tBNvBZGF0pV/uiwMTMhjLZAF4f1Azr1z7zTqPmrBbH8S1hx1/07UBojiARPt0Ut 561jMlBuQ/aOVU6BZDnwz5SKHkyf4O8nvROm6+FiSVa5r1si2JLXDBuXxF1x4GnUkAlD 2XWf7nh4eKyBeCQDTVso8zrNBKLsCEUiCsHjPzdUoPcbRjKRY1Pr0T8Vv+1N74u6f5CE ky9A== X-Gm-Message-State: AOAM531XcOvijx1lfKTw7atXRw/zWKG4BMFD/bG9pzlO5SE4AK3FWCyp WQaFxVXHcVUbKnxlJI7qpYttI4e6kTpirHHU X-Google-Smtp-Source: ABdhPJx/hiCAz8Legoa47eblx4WAapjkBFpTOjmMETdF/oVexGY9XgUxpPgGgIkrhHQJMAw0LEe2bA== X-Received: by 2002:a05:600c:4147:: with SMTP id h7mr5966082wmm.186.1604515011165; Wed, 04 Nov 2020 10:36:51 -0800 (PST) Received: from localhost ([2a01:4b00:8523:2d03:c8d2:30f2:53c6:bc2]) by smtp.gmail.com with ESMTPSA id e25sm4070787wra.71.2020.11.04.10.36.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 04 Nov 2020 10:36:50 -0800 (PST) From: David Brazdil To: kvmarm@lists.cs.columbia.edu Subject: [RFC PATCH 06/26] kvm: arm64: Add .hyp.data ELF section Date: Wed, 4 Nov 2020 18:36:10 +0000 Message-Id: <20201104183630.27513-7-dbrazdil@google.com> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201104183630.27513-1-dbrazdil@google.com> References: <20201104183630.27513-1-dbrazdil@google.com> MIME-Version: 1.0 Cc: Lorenzo Pieralisi , kernel-team@android.com, Marc Zyngier , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Catalin Marinas , Tejun Heo , Dennis Zhou , Christoph Lameter , Will Deacon X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add rules for renaming a .data ELF section in KVM nVHE object files to .hyp.data, linking it into the kernel and mapping it in hyp at runtime. Signed-off-by: David Brazdil --- arch/arm64/include/asm/sections.h | 1 + arch/arm64/kernel/vmlinux.lds.S | 10 ++++++++++ arch/arm64/kvm/arm.c | 7 +++++++ arch/arm64/kvm/hyp/nvhe/hyp.lds.S | 3 +++ 4 files changed, 21 insertions(+) diff --git a/arch/arm64/include/asm/sections.h b/arch/arm64/include/asm/sections.h index 3994169985ef..255f76f592d7 100644 --- a/arch/arm64/include/asm/sections.h +++ b/arch/arm64/include/asm/sections.h @@ -11,6 +11,7 @@ extern char __alt_instructions[], __alt_instructions_end[]; extern char __hibernate_exit_text_start[], __hibernate_exit_text_end[]; extern char __hyp_idmap_text_start[], __hyp_idmap_text_end[]; extern char __hyp_text_start[], __hyp_text_end[]; +extern char __hyp_data_start[], __hyp_data_end[]; extern char __idmap_text_start[], __idmap_text_end[]; extern char __initdata_begin[], __initdata_end[]; extern char __inittext_begin[], __inittext_end[]; diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 1bda604f4c70..a9a1612c084f 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -30,6 +30,13 @@ jiffies = jiffies_64; *(__kvm_ex_table) \ __stop___kvm_ex_table = .; +#define HYPERVISOR_DATA_SECTION \ + HYP_SECTION_NAME(.data) : { \ + __hyp_data_start = .; \ + *(HYP_SECTION_NAME(.data)) \ + __hyp_data_end = .; \ + } + #define HYPERVISOR_PERCPU_SECTION \ . = ALIGN(PAGE_SIZE); \ HYP_SECTION_NAME(.data..percpu) : { \ @@ -37,6 +44,7 @@ jiffies = jiffies_64; } #else /* CONFIG_KVM */ #define HYPERVISOR_EXTABLE +#define HYPERVISOR_DATA_SECTION #define HYPERVISOR_PERCPU_SECTION #endif @@ -207,6 +215,8 @@ SECTIONS EXIT_DATA } + HYPERVISOR_DATA_SECTION + PERCPU_SECTION(L1_CACHE_BYTES) HYPERVISOR_PERCPU_SECTION diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 5750ec34960e..8bb9fffe2a8f 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1602,6 +1602,13 @@ static int init_hyp_mode(void) goto out_err; } + err = create_hyp_mappings(kvm_ksym_ref(__hyp_data_start), + kvm_ksym_ref(__hyp_data_end), PAGE_HYP); + if (err) { + kvm_err("Cannot map hyp data section\n"); + goto out_err; + } + err = create_hyp_mappings(kvm_ksym_ref(__start_rodata), kvm_ksym_ref(__end_rodata), PAGE_HYP_RO); if (err) { diff --git a/arch/arm64/kvm/hyp/nvhe/hyp.lds.S b/arch/arm64/kvm/hyp/nvhe/hyp.lds.S index bb2d986ff696..bc1664d365a9 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp.lds.S +++ b/arch/arm64/kvm/hyp/nvhe/hyp.lds.S @@ -16,4 +16,7 @@ SECTIONS { HYP_SECTION_NAME(.data..percpu) : { PERCPU_INPUT(L1_CACHE_BYTES) } + + /* Put after '.data..percpu' because its name matches the same regex. */ + HYP_SECTION(.data) } -- 2.29.1.341.ge80a0c044ae-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm