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[209.132.180.67]) by mx.google.com with ESMTP id ch18si32232418plb.76.2019.08.01.01.19.44; Thu, 01 Aug 2019 01:19:45 -0700 (PDT) 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; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=cYaRmjxp; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730458AbfHAITo (ORCPT + 14 others); Thu, 1 Aug 2019 04:19:44 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:46979 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730392AbfHAITo (ORCPT ); Thu, 1 Aug 2019 04:19:44 -0400 Received: by mail-pg1-f193.google.com with SMTP id k189so14684731pgk.13 for ; Thu, 01 Aug 2019 01:19:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=z7GSqiJ6aBNFVvBBcZiH2v3S1Pbs9vo106t8SFNGIe4=; b=cYaRmjxpRpihR3ST0Z43FI6gGebPhfoWhCbpU+IMiA14zAmRrIrwHkLNPGxQbO3dwQ GKIF1ls+9uq+hNUdROGeAa0AknTV9vYQ5TFKVHdwI/2EmvyukmhMRTDGiva55cX2FenL aGDOJ5qzMHxinEWIcGbZyYj1dw2pxHV/LjncanSzzQL3S6e2pW5AVum+1MNUj63YHMgI N3LCp/eNbnqtm6aGhrAr6JZ+sPtBGtd3EyRopNtHb2rYD6dzl/Nm03uWLQROVJdNpWp7 tXl7No6eYiHWr+8KJFDPN8JbC84yPGs9/3Latvd+MfH6CI93+nX4fYz1N+Wls25RH5UP oHBw== 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=z7GSqiJ6aBNFVvBBcZiH2v3S1Pbs9vo106t8SFNGIe4=; b=fK00QAWMZ6PSf0dsc4WzvhjN5W+f7+F0VJV/vpZYKlLUFnpBaswMj77PPEfK5EiFYp ApubR6xHxVIlVj54ueielf/ChmulZe+P65T2SRsPv6hc5rPy3/MINr2h1GFTqTVu1cAd rln3CHG1qZToR0DdiXX5K7Pl1i8dmWHwAjK6xbG4tkqQLYEs3opL9qjyZm71QJ/SRsoe m2+VLCJO3Am4pM9y302jNQXEzqZZMwqRDYHwwJj3wOE6JbK9H64Q5uSQh3IBRkdJmkaz FCMHj4QbHyir7bnwObJ5FHcmQKXTpHfEq1cR6Ggbof2eZv4aXebcRdELKH5TjSA+35y6 Qpdg== X-Gm-Message-State: APjAAAVyEpNJhJFd9yAGOecj4dpYAXW71KQlG2pajwD+312DlIbxdmzS KW7iwmkKoe/oqhAxAkp/IYYvN52Hajo= X-Received: by 2002:a62:3c3:: with SMTP id 186mr51852915pfd.21.1564647583498; Thu, 01 Aug 2019 01:19:43 -0700 (PDT) Received: from localhost ([122.172.28.117]) by smtp.gmail.com with ESMTPSA id l1sm91579706pfl.9.2019.08.01.01.19.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 01 Aug 2019 01:19:43 -0700 (PDT) From: Viresh Kumar To: stable@vger.kernel.org Cc: Viresh Kumar , Julien Thierry , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Marc Zyngier , Mark Rutland , Will Deacon , Russell King , Vincent Guittot , mark.brown@arm.com, guohanjun@huawei.com Subject: [PATCH ARM32 v4.4 V2 03/47] arm64: KVM: Report SMCCC_ARCH_WORKAROUND_1 BP hardening support Date: Thu, 1 Aug 2019 13:45:47 +0530 Message-Id: <62376918dc348842e21f6eb62235220f53d35cdb.1564646727.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 2.21.0.rc0.269.g1a574e7a288b In-Reply-To: References: MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marc Zyngier commit 6167ec5c9145cdf493722dfd80a5d48bafc4a18a upstream. A new feature of SMCCC 1.1 is that it offers firmware-based CPU workarounds. In particular, SMCCC_ARCH_WORKAROUND_1 provides BP hardening for CVE-2017-5715. If the host has some mitigation for this issue, report that we deal with it using SMCCC_ARCH_WORKAROUND_1, as we apply the host workaround on every guest exit. Tested-by: Ard Biesheuvel Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Catalin Marinas [ Viresh: Picked on only arm-smccc.h changes ] Signed-off-by: Viresh Kumar --- include/linux/arm-smccc.h | 5 +++++ 1 file changed, 5 insertions(+) -- 2.21.0.rc0.269.g1a574e7a288b diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index da9f3916f9a9..1f02e4045a9e 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -73,6 +73,11 @@ ARM_SMCCC_SMC_32, \ 0, 1) +#define ARM_SMCCC_ARCH_WORKAROUND_1 \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 0x8000) + #ifndef __ASSEMBLY__ /**