From patchwork Mon Apr 12 01:48:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1464934 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=SYWY0d3o; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4FJWqn1K2nz9sXh for ; Mon, 12 Apr 2021 11:49:09 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236248AbhDLBtZ (ORCPT ); Sun, 11 Apr 2021 21:49:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235543AbhDLBtY (ORCPT ); Sun, 11 Apr 2021 21:49:24 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A5609C061574 for ; Sun, 11 Apr 2021 18:49:07 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id t22so5196934ply.1 for ; Sun, 11 Apr 2021 18:49:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=aPW9xuVZJZuCiDrYNQXotx3oRG9X3McxReJTO2kC5og=; b=SYWY0d3oAkHA3HQIL62Nqb0zxyIXpk49D+FvlZFrRHC8iiKzs7iIbjSkYcWrt1UCwc g4FJ3SDPh+7EpWhSOmC1mM74DIPF329C11OpaoPO94H5XH/nJhpM6g5octHAdEcO61qt aIT3bRA3lGXrFJIpN/YdDtcrmMqKuXB1wxPOeebU9m4ZkmckrpYITI5Pg/qDK37Lf+qQ cg5JU0MwFiT6+fN9b7hdJRdrjMz/8H1vvD0dFfgeb5thcGI+1x0v8u1AsXxVjs2jk3fO gi18DfyAAncd7ZcpG6sdiTfTvPJBRf0fpZ9SJnTJ2494KmsTEi1uivVitDlwHETY8Qbz Hlkw== 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=aPW9xuVZJZuCiDrYNQXotx3oRG9X3McxReJTO2kC5og=; b=oGmIICoCWJF251XUVhWcVIeB77+JcbwseYmwHdxqTVaIDTfTev/RH9fKiAsS/WErng o03vYPKEHPCV78LNuhiQn31sJtP8zhr0TxHqLZrjttpXEM0ZmSOrmRslFSzwsBz9S9qF y2Ry9zgtOP6cnGDKYR/mBGXFcvJTMvFtg1wfBjV+H5jBtGjEiYwX1civvKVR65mBQkE0 OT9jzRlcoegpvtG6zqFOF830FvCd9B8bfznZ6d098IIDp4FRad7+ZS7tcQ4NYUIP8iQz h4v+J+G5LWhMC9OaYhXQXjEPl0uu/GhyQWAYhXRCg0uhKUaeaxvSpQg0fy1LAc1NyU3B fdGw== X-Gm-Message-State: AOAM531ksg1s/CSEMigg5oAmHl8WNk4YC/zsp2rH4bStxFv6FIRG17dZ cUiVPTz6p3IyLGT44Wq/Z60YEDG3v0c= X-Google-Smtp-Source: ABdhPJy8SNqNyFIyV1FVhMCiP8rj7Natlar2xhV5RA3NVM+u7+4+x0Ghsb4SrJTOVJ0aBVfaYEgdtg== X-Received: by 2002:a17:90a:b10a:: with SMTP id z10mr1835470pjq.161.1618192147216; Sun, 11 Apr 2021 18:49:07 -0700 (PDT) Received: from bobo.ibm.com (193-116-90-211.tpgi.com.au. [193.116.90.211]) by smtp.gmail.com with ESMTPSA id m9sm9502345pgt.65.2021.04.11.18.49.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Apr 2021 18:49:07 -0700 (PDT) From: Nicholas Piggin To: kvm-ppc@vger.kernel.org Cc: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy Subject: [PATCH v1 05/12] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC] Date: Mon, 12 Apr 2021 11:48:38 +1000 Message-Id: <20210412014845.1517916-6-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210412014845.1517916-1-npiggin@gmail.com> References: <20210412014845.1517916-1-npiggin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Prevent radix guests setting LPCR[TC]. This bit only applies to hash partitions. Reviewed-by: Alexey Kardashevskiy Signed-off-by: Nicholas Piggin --- arch/powerpc/kvm/book3s_hv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 3de8a1f89a7d..70c6e9c27eb7 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1645,6 +1645,10 @@ static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, */ unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm, unsigned long lpcr) { + /* LPCR_TC only applies to HPT guests */ + if (kvm_is_radix(kvm)) + lpcr &= ~LPCR_TC; + /* On POWER8 and above, userspace can modify AIL */ if (!cpu_has_feature(CPU_FTR_ARCH_207S)) lpcr &= ~LPCR_AIL;