From patchwork Thu Apr 1 15:02:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1461228 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=nSmDau+w; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4FB9Zm3vtJz9t0G for ; Fri, 2 Apr 2021 04:45:52 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236248AbhDARoM (ORCPT ); Thu, 1 Apr 2021 13:44:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234666AbhDARjD (ORCPT ); Thu, 1 Apr 2021 13:39:03 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C9C6C0F26D9 for ; Thu, 1 Apr 2021 08:03:49 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id k23-20020a17090a5917b02901043e35ad4aso3224836pji.3 for ; Thu, 01 Apr 2021 08:03:49 -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=2ljQ2o/1KJXmV5budvf2xHhIW20DBRLuADvMqiJ21X0=; b=nSmDau+w/+aVDhTXw35u1WBNcdKzf7qo9PmSZIT/XQ4+Yj1NafR3w7D3COAcOUcbsJ M3a8kec/zBYQSfxBoxR/Z8MaZ7qa16uQLbXUGTQy1tZ76DtCibMwpeLiFe7PNUTcXfVp MuzKMg/oCYbLeK8SIO2LuGS/eAIuWF+3niQDgwnTcoT2ypKBhER6uiXCIm3fyBy7nodN 51h1VT2XC23AACqUDIyvA1XOmcPJGWJJJD0umcoSkUJy3twtBLTBYIbaJ8A7W3aP6EYn JXmcjaVyeYBWgrUjcXftxi0/A5M2wt4/D6Y7ahHh5btWwVbmNJvbCR8eiDsE4TXGIp7b Djzw== 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=2ljQ2o/1KJXmV5budvf2xHhIW20DBRLuADvMqiJ21X0=; b=KUgc68By67lzSWToz1EvxpNlNdfFg7+gLYl+sdCfYvl8Vzvqrryre9TJg38QlneWIH EHHz5T7aZ8YFOP7JKlfuFWcek/gKbX3oAcVLl+h23I85z8r8NkqxxW00bgCwxWl322wf 0VciD+ruQvbij/in/kQjCG0tlfQ+vGyYVUuOvF72cUiAGUhkxZZnom2XZUh4r+GEpGr1 pFIHPKbtdonJo6A04CQQxbeceR/cevSbWP8JWs9p3rjwNTuAh4iGKgrrDFHwRFysP5iW FuSR3Uwetl7teF06kRZvewStJfCN5Zk2Bu990zwdYg+/RE41rhCxOogHSOZQ+/P8xrB8 psWg== X-Gm-Message-State: AOAM531YaVNNP+sz8fd8YG98SpDf2RYVWg06eEkoi5ref03wK0WWTLM0 MjjWkJM4buiAO6atTZYFO5BhK6aWUYA= X-Google-Smtp-Source: ABdhPJxqgIwpjVBmqEUJt/5rZZ2PMe1ApS0YwaeZMy7M/s+ccTi4enhWYVUkmtmbKM+OTKLDzSGPQg== X-Received: by 2002:a17:902:c48d:b029:e6:f7d:a76d with SMTP id n13-20020a170902c48db02900e60f7da76dmr8340029plx.66.1617289429147; Thu, 01 Apr 2021 08:03:49 -0700 (PDT) Received: from bobo.ibm.com ([1.128.218.207]) by smtp.gmail.com with ESMTPSA id l3sm5599632pju.44.2021.04.01.08.03.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Apr 2021 08:03:48 -0700 (PDT) From: Nicholas Piggin To: kvm-ppc@vger.kernel.org Cc: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy Subject: [PATCH v5 04/48] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC] Date: Fri, 2 Apr 2021 01:02:41 +1000 Message-Id: <20210401150325.442125-5-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210401150325.442125-1-npiggin@gmail.com> References: <20210401150325.442125-1-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 daded8949a39..a6b5d79d9306 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;