From nobody Fri Dec 19 21:02:18 2025 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA9A42E719B; Wed, 3 Dec 2025 13:28:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764768522; cv=none; b=JXiSRR2FttskxVcUZA8Ua1PYp6tq1RVHqoLW0pUv7BlZtZO8QJxe10TDz07GwGNhhXubNHjHgzVZcxmC1T2jNAG1Jzj6I60PRJ9xiRshE9Wre8treVePdi0Y/PQH0gpCK0b+D6QUpUEp9JApzTloallPngymGDiglPoqN1ATSnA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764768522; c=relaxed/simple; bh=9mY8Yf4bW2k9L1DWggOCbOFScJnD8eYSXOmjCuaEv18=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=c/v214muQCodMKQJbrjw/NPu6aK0B7n7OKEp+ruTF42nqGayOR4p4LbNEtZGw0ZjLlhdHWLuw0uASzNqSYSas2Mg0pL5j5r9mLxbe4LN6ZM8f8KFm+ojnnHhl8ULBx8UuH8tpz9hnqj4kgA5YgexWYZDqG/BplRdEQriywIFozo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=F6+MDQHc; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="F6+MDQHc" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5B3BtPR3006545; Wed, 3 Dec 2025 13:28:19 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=pp1; bh=3r8m3ujySEwGzvYYFlCm8bT+TejmpDgozSw5ZyVBi LI=; b=F6+MDQHcs+NTQ8uS7dIQT8nRI6NhwwzznnYWUjHwcriPaVnPRoJ2H6juu 8Ws8m+mX2JQfXSO6lyYOdwKnKLlaYXYha26dWbAPbAIlTDNhy5h4qtEbURv/YTk9 H8f+y5qmRI3gHXW64Ri8rTan2e9cM4PV89mxc06HztrT67gROcFpgTR959BF8NSW 0xhNmNz3IEGqf3e9fXvwHsbsiRvC/wxticfuFLoUSKNTv24d2+VJRvRqcF0REcyR XOWWcZGMMC+eW8VuqxLLD193Ajd/UprusjyTJNSBH32sp+RWkfgbaBv9I7QqMELT VMrOm+J8YuMePm8V7eAFo8U0di8CQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4aqq8utgab-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 03 Dec 2025 13:28:19 +0000 (GMT) Received: from m0353725.ppops.net (m0353725.ppops.net [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.0.8) with ESMTP id 5B3DKXlA007237; Wed, 3 Dec 2025 13:28:18 GMT Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4aqq8utga7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 03 Dec 2025 13:28:18 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 5B3CA7rq024098; Wed, 3 Dec 2025 13:28:17 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4arb5sjctd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 03 Dec 2025 13:28:17 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 5B3DSDxg25952710 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 3 Dec 2025 13:28:13 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5F6B120043; Wed, 3 Dec 2025 13:28:13 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C33FF20040; Wed, 3 Dec 2025 13:28:09 +0000 (GMT) Received: from localhost.localdomain (unknown [9.43.93.147]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 3 Dec 2025 13:28:09 +0000 (GMT) From: Gautam Menghani To: maddy@linux.ibm.com, vaibhav@gmail.com, npiggin@gmail.com, mpe@ellerman.id.au, christophe.leroy@csgroup.eu Cc: Gautam Menghani , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] KVM: PPC: Add the missing character/behaviour bits for KVM_PPC_GET_CPU_CHAR ioctl Date: Wed, 3 Dec 2025 18:58:03 +0530 Message-ID: <20251203132804.16692-1-gautam@linux.ibm.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: MOyR1RV_mJtTNWylyerCyANyXdgGe9XO X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTI5MDAwOCBTYWx0ZWRfX1iS6lacoqI21 Dd/4IHQVQ0NQhQ6Mt1X8X+rz1pAhAU9oVSfraHhymH8jAcNFq1uKlqXL2hMo1iD5PQUQzg8IzhG 6Xdx/aYqkdDQZWRV3rgVgzx0Ir20mLONB7PmPQZ6XstZtD+e5xsPjkb3Nibu6+ZQ4jh18pGLLZl NI10vuzv0qfcih89NDO/lg98X8qbq9YCKPXhdwktOc4QaHwSuYhn221jqEEGlhgR2E/MUz2zWLW x0i7RZdTOce20VbjLovnVjdwKGEzmrVo6sAyS8ik80CAlEVBVaLikYABdRF5EX+Vr8ar0WwvcSr KxTFTtu/4jhZdwd27Vd7gCoh9IT8w9Dv0FnlEdoLGm1PKavfEoTDFcYx6l1RHw+sM5kX8voZYRs FpkmKKiujlKqOJMmFR7p3yBXlN1nyA== X-Authority-Analysis: v=2.4 cv=Scz6t/Ru c=1 sm=1 tr=0 ts=69303af3 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=TlQordfOB7iyn_4i_zgA:9 X-Proofpoint-GUID: yD6JfmJtiEzK7Rb1S0UuQWWQAjVT6kwV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-03_01,2025-11-27_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 spamscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511290008 Content-Type: text/plain; charset="utf-8" Add the missing bits for the character and behaviour masks used to indicate the valid bits in the result of KVM_PPC_GET_CPU_CHAR ioctl used by KVM guests to know the host mitigation status. Signed-off-by: Gautam Menghani --- arch/powerpc/include/uapi/asm/kvm.h | 6 ++++++ arch/powerpc/kvm/powerpc.c | 10 ++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uap= i/asm/kvm.h index 077c5437f521..19ad60fb9147 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -450,11 +450,17 @@ struct kvm_ppc_cpu_char { #define KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF (1ULL << 57) #define KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS (1ULL << 56) #define KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST (1ull << 54) +#define KVM_PPC_CPU_CHAR_BCCTR_LINK_FLUSH_ASSIST (1ull << 52) =20 #define KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY (1ULL << 63) #define KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR (1ULL << 62) #define KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR (1ULL << 61) +#define KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY_H (1ull << 60) #define KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE (1ull << 58) +#define KVM_PPC_CPU_BEHAV_FLUSH_LINK_STACK (1ull << 57) +#define KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_ENTRY (1ull << 56) +#define KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_UACCESS (1ull << 55) +#define KVM_PPC_CPU_BEHAV_NO_STF_BARRIER (1ull << 54) =20 /* Per-vcpu XICS interrupt controller state */ #define KVM_REG_PPC_ICP_STATE (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8c) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 2ba057171ebe..642740c86272 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -2261,11 +2261,17 @@ static int pseries_get_cpu_char(struct kvm_ppc_cpu_= char *cp) KVM_PPC_CPU_CHAR_BR_HINT_HONOURED | KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF | KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS | - KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST; + KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST | + KVM_PPC_CPU_CHAR_BCCTR_LINK_FLUSH_ASSIST; cp->behaviour_mask =3D KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY | KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR | KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR | - KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE; + KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY_H | + KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE | + KVM_PPC_CPU_BEHAV_FLUSH_LINK_STACK | + KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_ENTRY | + KVM_PPC_CPU_BEHAV_NO_L1D_FLUSH_UACCESS | + KVM_PPC_CPU_BEHAV_NO_STF_BARRIER; } return 0; } --=20 2.50.1 (Apple Git-155)