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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 A4C05C4742C for ; Thu, 12 Nov 2020 01:42:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 55B8D2076E for ; Thu, 12 Nov 2020 01:42:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VfLxL9U/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729695AbgKLBlZ (ORCPT ); Wed, 11 Nov 2020 20:41:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728227AbgKLBTm (ORCPT ); Wed, 11 Nov 2020 20:19:42 -0500 Received: from mail-qv1-xf41.google.com (mail-qv1-xf41.google.com [IPv6:2607:f8b0:4864:20::f41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 694C5C0613D1; Wed, 11 Nov 2020 17:19:42 -0800 (PST) Received: by mail-qv1-xf41.google.com with SMTP id g19so2017141qvy.2; Wed, 11 Nov 2020 17:19:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=t6O0sYxJBUgk9V8FqRpsvwNNwz5ipQ+AansIawZja9I=; b=VfLxL9U/SBb06NU26ZQg3mLeQ4YU1vURENNOX5o9q82sPjjgQlOfM1ZNu2MEX8cf13 HiYQalcws2knOoe8K/KgYewmysQ8XDLjytyJ8Lj9gBheD0Bkl2D+PJIGAJlHwq3P0Jul LZrPQncH0vQobnEM1JMY88RpxSVE3r7lG47hHG5WmhT2Yiw+NisM+btts8lhN4bJuRk9 pgEAtMLaELZYognagwPWUCKr52rDSoRc9Hk/TipywE70ue8nFy0R0/Z+wRYQwX5H1vI7 MU5hAswXktl9GHH4aJsXmWx0TRKsirtCqDa7tWPiyikBYgQZj4a0OIMOCvOQ3zHmNcGY 9Hfg== 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:mime-version :content-transfer-encoding; bh=t6O0sYxJBUgk9V8FqRpsvwNNwz5ipQ+AansIawZja9I=; b=bSoNwVmoh94Qs4uSElACDIQ7p9xiuV5WxLyWS9EVZrlz27LH6L3GCwjccGx1a5I2Zt tBTZyHzllM32C+Q6QaMFOHlsObQZoAieEBaACRHP6NZOXLlI4V6S1hs83cYDBSCAAe3O vinpcuqambpLA8wTbWYDlPoiT7zT5QTrcdIDyYeAfyFxvqlvaMVvzAbpKEhR9u+Msn7h 75jdJ+9gQXeuPPPRqzHpd4IqRRMVELFFBFJj8mXBGfX3KWMGUnfsskvT6XGlzY652EIQ xJD6js6EuwiXrzxPzoIsPVVWJM23f0pAYKfkOBViz5TcVHfnGkQMvUQJMTrkBZcWI58g QDgQ== X-Gm-Message-State: AOAM532EgPHLh+15bydVIgOzZwSO4HAZV4zXRDV8lPEio+cyy8u1vPNM wQll9JLWeRO+wFojYiZR3P0= X-Google-Smtp-Source: ABdhPJyjsvg9C4SUokM73BG6LLbH3Hup8iycj/2InNMean/F6Boq/HwoUQ1KVzkfw4ArHsGv4r+FTA== X-Received: by 2002:a0c:a5a2:: with SMTP id z31mr29221656qvz.15.1605143981548; Wed, 11 Nov 2020 17:19:41 -0800 (PST) Received: from LeoBras.ibmuc.com (179-125-145-97.dynamic.desktop.com.br. [179.125.145.97]) by smtp.gmail.com with ESMTPSA id e10sm4153867qkn.126.2020.11.11.17.17.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Nov 2020 17:18:17 -0800 (PST) From: Leonardo Bras To: Paul Mackerras , Michael Ellerman , Benjamin Herrenschmidt Cc: Leonardo Bras , kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/1] powerpc/kvm: Fix mask size for emulated msgsndp Date: Wed, 11 Nov 2020 22:16:55 -0300 Message-Id: <20201112011655.382866-1-leobras.c@gmail.com> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org According to ISAv3.1 and ISAv3.0b, the msgsndp is described to split RB in: msgtype <- (RB) 32:36 payload <- (RB) 37:63 t <- (RB) 57:63 The current way of getting 'msgtype', and 't' is missing their LSB: msgtype: ((arg >> 27) & 0xf) : Gets (RB) 33:36, missing bit 32 t: (arg &= 0x3f) : Gets (RB) 58:63, missing bit 57 Fixes this by applying the correct mask. Signed-off-by: Leonardo Bras --- arch/powerpc/kvm/book3s_hv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index e3b1839fc251..5af0a429cee8 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1241,9 +1241,9 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) switch (get_xop(inst)) { case OP_31_XOP_MSGSNDP: arg = kvmppc_get_gpr(vcpu, rb); - if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) + if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) break; - arg &= 0x3f; + arg &= 0x7f; if (arg >= kvm->arch.emul_smt_mode) break; tvcpu = kvmppc_find_vcpu(kvm, vcpu->vcpu_id - thr + arg); @@ -1256,7 +1256,7 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) break; case OP_31_XOP_MSGCLRP: arg = kvmppc_get_gpr(vcpu, rb); - if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) + if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) break; vcpu->arch.vcore->dpdes = 0; vcpu->arch.doorbell_request = 0; -- 2.25.4