From patchwork Tue Jan 28 18:49:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11355033 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0030F92A for ; Tue, 28 Jan 2020 18:52:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D22C7214AF for ; Tue, 28 Jan 2020 18:52:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qNR/IhWW"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="XUGEKZAh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D22C7214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version :Message-Id:In-Reply-To:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sP1Aweyqwy5dZNaP3F42yoJCMrnxce0bYV1FPPe0Q2w=; b=qNR/IhWWb8D8nE 5LMR3Mmdsbiz8sOiI8LzGIbz4yFeW6MtkxCzlPowq9fQ/DucIO08zzUC+EIxR66irc7j75IXKkPh/ CWISky9jLCxdj8kfrJ64XQrIM75zQ4j7uB7k+acMOAgHQDGid0t14RUFmioojK7rQi50TGTJwXue6 6foCxpYwBeQy+KaNWsIqgTooxk/cffh2SbZ2RAWST7m3eTQRngSckXtx1E8QyKhQ1byw36D3dRqpi mqO2nlykQThU40eNLpILv86rrQ9ZzrqbLhXrxfA2Um7Zv0uRjGilB0vNmaFsHXlzRioYsrXbwwWR/ 0UyI0nOs2swvykNP/1Ag==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwVyL-0002ir-QQ; Tue, 28 Jan 2020 18:52:25 +0000 Received: from mail-pl1-x649.google.com ([2607:f8b0:4864:20::649]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwVw5-0007yO-Ih for linux-arm-kernel@lists.infradead.org; Tue, 28 Jan 2020 18:50:08 +0000 Received: by mail-pl1-x649.google.com with SMTP id p19so939363plr.8 for ; Tue, 28 Jan 2020 10:50:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=g0WhvzNfeF8IPmBIIuRbqPpME0iXsXClcoR+8QuQDeM=; b=XUGEKZAhBvSu9urDokgThLy629jPYLYOSmnR3mhcWiS20LG7HIFJnnyG7U9FeOKODN dRcN/ygKYsH8zvUKqKrrEoAeiJh6xj9bUwUihjFNwrC/HNMCo631ZmTMa3qkV5FANr8P 6Bjc+r6yLtlgBlUAHhWWjX/TBrDG4QySpa2+C3PTWI7oznRugEbMlEysjsNyTLYh3Ly7 v4QRry1d0cr919cFyJZHFpX/pPX+XmluNzInaHF+jkT6HB6vLrQ8GXNwv3HX2Ci3+Tcp DP6fw9+xZnGwQ4GQ+XUf08VGNsAQ/+zNH2o7Wt5M0nyNImoOhkc1Qa5/vpdDpvtQ4s0K vK7A== X-Google-DKIM-Signature: v=1; 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=g0WhvzNfeF8IPmBIIuRbqPpME0iXsXClcoR+8QuQDeM=; b=pGY9w81klR7SPn2oXoObJAXzS1tD3StjSxVm1xieKlD8mDdVndrzqWpr8C8qp4dfvf sQZQcBTUkt1xkket0T4c9C9OQZ+5C4XZISvbGhe5/HlNq0Z9NXopebP2T4EUIGZEB38O eE9SFgS6B8mTmyEO5Gx/oVIto9us57ag9ZSP3ARMbGf+Wq0RH+eYnsAs+yNo3fmHQM5O VXmJKnFamDz1ni0hABNd/W759vmmO0VBt4R6NJbCsQzHrHdHq5dpf5FVyPMBOYah7Ds3 We7WhUjmIIMtnrAAF54TyBCaRG9QYb2mdnJUYeXedCN/zOXjUhEUbPU128t1TGnKq/2i YoeQ== X-Gm-Message-State: APjAAAVXi89nAmDNQnRNRMCyr0St3YzgN3oisGOgW8yhmclhbGHLDdmZ RhIpdpbvRwvrM/sz+qId7MaUSfTLwqILIW6un28= X-Google-Smtp-Source: APXvYqwm7y9ypcJdyxgJATkCgSChfFuwRpCL+hYKepF5YmIgtTs92oWD8GlXJgm6y8lRU+5VPoS8wWchRxTA1u6Ws80= X-Received: by 2002:a63:d90c:: with SMTP id r12mr19771294pgg.106.1580237401355; Tue, 28 Jan 2020 10:50:01 -0800 (PST) Date: Tue, 28 Jan 2020 10:49:32 -0800 In-Reply-To: <20200128184934.77625-1-samitolvanen@google.com> Message-Id: <20200128184934.77625-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200128184934.77625-1-samitolvanen@google.com> X-Mailer: git-send-email 2.25.0.341.g760bfbb309-goog Subject: [PATCH v7 09/11] arm64: disable SCS for hypervisor code From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland , james.morse@arm.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200128_105005_688847_1E4C3460 X-CRM114-Status: UNSURE ( 9.32 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:649 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Masahiro Yamada , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Filter out CC_FLAGS_SCS and -ffixed-x18 for code that runs at a different exception level. Suggested-by: Steven Rostedt (VMware) Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Reviewed-by: Mark Rutland Acked-by: Will Deacon --- arch/arm64/kvm/hyp/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index ea710f674cb6..5843adef9ef6 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -28,3 +28,6 @@ GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n KCOV_INSTRUMENT := n + +# remove the SCS flags from all objects in this directory +KBUILD_CFLAGS := $(filter-out -ffixed-x18 $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))