From patchwork Mon Apr 5 01:19:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1462175 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=jteegXL2; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4FDCWn2Tzpz9sWX for ; Mon, 5 Apr 2021 11:20:21 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231826AbhDEBUZ (ORCPT ); Sun, 4 Apr 2021 21:20:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231656AbhDEBUY (ORCPT ); Sun, 4 Apr 2021 21:20:24 -0400 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD4BCC061756 for ; Sun, 4 Apr 2021 18:20:14 -0700 (PDT) Received: by mail-pg1-x530.google.com with SMTP id g35so2418127pgg.9 for ; Sun, 04 Apr 2021 18:20:14 -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=jteegXL22i+h9UVPqzn2fKvO68awdCVK3/kmTXzoyUnBcLbviueKoFI+ypqp8rvTw3 Q+wiC7tzAFBILyZdrXGElHnzu2vR4ujsIz1szk24wBflaorLv9Sc57jZ3fIY8ylC4LnX ckclJGWyS2ugmRrEJM2liYX4/0e3ILdx4973YzOEcwakKJ8abSW06w397K1P/SH6Ld90 wZkVMRsWCh5SPnaYm4WgEhuL9rKuFyMLq+IyUDFdv210jbVe+1zcvlRM+7nvlcIud5xc RunY0YAzhPRN7YiyWhtnfdFB34KPQGDpjxc/dwqUjSrr9YGFXuED5iB2JA1BCaH5ZK5N hXnw== 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=i4KFz35LKWmGjEdLeID2YDSCRPkD/PiE0S0k/MJZAGTjtgC+t64lNRi9hNnVXXqulR sr9rthj5uqyNfDw4mYAX72+RgSKhQd4fsp3KWsKNemJ9WKrYoOU1JM39UXw2IplL39Q9 md6PiRHguFwFeDePUH0X8U0tnej3A/+GgdMSEHXHocj/n2oyQs/ViDIa5gcLItZUIGDa OABwJEvu8PbNbBgAnML+5ESa9JaqU9FEOi0ssiInPUEDUwz7Yd6VVWYmrI6nH7Bq6hGP H2e74W1gfEnOYXI20PEzeS3U64LF+IomCZ23EFxOvorKVVJfPlGSBDasebr653Nh1OKq nC1w== X-Gm-Message-State: AOAM531cddICPVgtvypDfIvzITRQ8aH9AIPMHApJ0dqS0VQZEStXIxDH Y7erzPpNnjN7NUF2vRHPx63TKOpAtPA3SQ== X-Google-Smtp-Source: ABdhPJy4e6XKE8ykNm7P8y7vG58oHuwFcXPgmxUmMJ1wX3FpQZ9izeGtMahOaoXNWJTWTTcgx2o7LQ== X-Received: by 2002:a65:6645:: with SMTP id z5mr20660659pgv.273.1617585614266; Sun, 04 Apr 2021 18:20:14 -0700 (PDT) Received: from bobo.ibm.com ([1.132.215.134]) by smtp.gmail.com with ESMTPSA id e3sm14062536pfm.43.2021.04.04.18.20.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Apr 2021 18:20:14 -0700 (PDT) From: Nicholas Piggin To: kvm-ppc@vger.kernel.org Cc: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy Subject: [PATCH v6 04/48] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC] Date: Mon, 5 Apr 2021 11:19:04 +1000 Message-Id: <20210405011948.675354-5-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210405011948.675354-1-npiggin@gmail.com> References: <20210405011948.675354-1-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;