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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=XgpctoHh6dg1wxvj3BzSThVl8kpcEhXa3sNGXPcFbT4=; b=WeK+Ai67TrRRzoiapnQNK5WSdmTXOVcTaE/LzU6mVaa9s8APAeOGjTdwUPCCvOpihs 9iZZbx8YjD8j+Y33T8cbXEjEzSyGkF+Olo+E4VFSsElUKBoRWq0yGtzAG8EChHcb4mkp +6idNjTTl3Z4VXmNRJE7JB48pYdDIqmD/jh0mGvoPQCyTYAw519gtHYP6r9iVDMwKMut 7atX8JmsXCMSodV+i//EzhtcIMGIGCD7EzneFnF6lHAKQ278Xo91IHUwIMnchZVjbtly 0sSgQ4+ughaULjICk9kwoJk1agPtx8rZquEEPe423k/Q+3bKhSmFOsXzq6Hgve92SZru Qa0w== X-Gm-Message-State: APjAAAUD8cc5vCW5AJxt6bRFL0yuS7JE9D1Hs51HFbgr58TIVrG30RrM DgIeLgCq7Bw2ft5mWsjDgWjTYhQW3djQxkqBCKH5uA== X-Google-Smtp-Source: APXvYqyjKo/YFw4KoPFfCCWJOIKf5+SsU5ZWgCMmPdEkaicagM609YliueP7WkCTKw6TDAOHNRXlU3z7/h7iIoQqHFg= X-Received: by 2002:a67:f4d2:: with SMTP id s18mr12516774vsn.15.1581528660711; Wed, 12 Feb 2020 09:31:00 -0800 (PST) MIME-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200128184934.77625-1-samitolvanen@google.com> <20200128184934.77625-10-samitolvanen@google.com> <6f62b3c0-e796-e91c-f53b-23bd80fcb065@arm.com> <20200210175214.GA23318@willie-the-truck> <20200210180327.GB20840@lakrids.cambridge.arm.com> <20200210180740.GA24354@willie-the-truck> <20200210182431.GC20840@lakrids.cambridge.arm.com> <20200211095401.GA8560@willie-the-truck> In-Reply-To: <20200211095401.GA8560@willie-the-truck> From: Sami Tolvanen Date: Wed, 12 Feb 2020 09:30:49 -0800 Message-ID: Subject: Re: [PATCH v7 09/11] arm64: disable SCS for hypervisor code To: Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200212_093104_757474_3D287F36 X-CRM114-Status: GOOD ( 10.06 ) 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: Mark Rutland , Kees Cook , Ard Biesheuvel , Masahiro Yamada , Catalin Marinas , Jann Horn , Nick Desaulniers , LKML , Steven Rostedt , Miguel Ojeda , clang-built-linux , James Morse , Masami Hiramatsu , Marc Zyngier , Kernel Hardening , Laura Abbott , Dave Martin , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Feb 11, 2020 at 1:54 AM Will Deacon wrote: > Thanks, I missed that. It's annoying that we'll end up needing /both/ > -ffixed-x18 *and* the save/restore around guest transitions, but if we > actually want to use SCS for the VHE code then I see that it will be > required. > > Sami -- can you restore -ffixed-x18 and then try the function attribute > as suggested by James, please? Sure. Adding __noscs to __hyp_text and not filtering out any of the flags in the Makefile appears to work. I'll update this in the next version. Sami _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel