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=-3.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 3FE36C433E2 for ; Mon, 22 Jun 2020 08:07:02 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id EA4F6207C3 for ; Mon, 22 Jun 2020 08:07:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="tofBpQcy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EA4F6207C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 A346C4B0B1; Mon, 22 Jun 2020 04:07:01 -0400 (EDT) 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=@kernel.org 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 EcHF0UsrC-Iu; Mon, 22 Jun 2020 04:06:57 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E79834B0B3; Mon, 22 Jun 2020 04:06:56 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 732E24B092 for ; Mon, 22 Jun 2020 04:06:55 -0400 (EDT) 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 aphQvN9zJQmD for ; Mon, 22 Jun 2020 04:06:54 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 5FE284B0A3 for ; Mon, 22 Jun 2020 04:06:54 -0400 (EDT) Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1D60E207C3; Mon, 22 Jun 2020 08:06:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592813213; bh=Ii14i7vMt5G0blEY8jOOtv2hk5ArajPnLztxOTdDv4o=; h=From:To:Cc:Subject:Date:From; b=tofBpQcybBeOKxwi8eoUa+ScRMUGCbQlt4sgu/nO4mJqbCzrEuGE1DgnIgIYns6VG Y+7ifpP6U5+arBiWpI32ti/Y2LlZa6Ve+oiwtHz2lO/zCvssW41I0leGdPqyVobmom 2SP3RE7P4Ucv/BmtBeQRSRMIN7daLpqlPS2cOpGQ= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jnHTf-005FG8-Br; Mon, 22 Jun 2020 09:06:51 +0100 From: Marc Zyngier To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 0/5] KVM/arm64: Enable PtrAuth on non-VHE KVM Date: Mon, 22 Jun 2020 09:06:38 +0100 Message-Id: <20200622080643.171651-1-maz@kernel.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, mark.rutland@arm.com, ascull@google.com, Dave.Martin@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: kernel-team@android.com, Dave Martin 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 Not having PtrAuth on non-VHE KVM (for whatever reason VHE is not enabled on a v8.3 system) has always looked like an oddity. This trivial series remedies it, and allows a non-VHE KVM to offer PtrAuth to its guests. In the tradition of not having separate security between host-EL1 and EL2, EL2 reuses the keys set up by host-EL1. It is likely that, should we switch to a mode where EL2 is more distrusting of EL1, we'd have private keys there. The last two patches are respectively an optimization when save/restoring the PtrAuth context, and a cleanup of the alternatives used by that same save/restore code. * From v1 [1]: - Move the hand-crafted literal load to using a mov_q macro (Andrew, Mark) - Added a cleanup of the alternatives on the save/restore path (Mark) [1] https://lore.kernel.org/kvm/20200615081954.6233-1-maz@kernel.org/ Marc Zyngier (5): KVM: arm64: Enable Address Authentication at EL2 if available KVM: arm64: Allow ARM64_PTR_AUTH when ARM64_VHE=n KVM: arm64: Allow PtrAuth to be enabled from userspace on non-VHE systems KVM: arm64: Check HCR_EL2 instead of shadow copy to swap PtrAuth registers KVM: arm64: Simplify PtrAuth alternative patching arch/arm64/Kconfig | 4 +--- arch/arm64/include/asm/kvm_ptrauth.h | 30 ++++++++++------------------ arch/arm64/kvm/hyp-init.S | 5 +++++ arch/arm64/kvm/reset.c | 21 ++++++++++--------- 4 files changed, 27 insertions(+), 33 deletions(-) -- 2.27.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm