From nobody Mon Feb 9 15:25:45 2026 Received: from fra-out-003.esa.eu-central-1.outbound.mail-perimeter.amazon.com (fra-out-003.esa.eu-central-1.outbound.mail-perimeter.amazon.com [3.72.182.33]) (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 A8963223DD6; Wed, 14 Jan 2026 13:46:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=3.72.182.33 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768398376; cv=none; b=swAo5g5JQ5M3zxqk8TY6je7g7WsRZcRD3T0GNz2Lc6fEE1ZTvjGg1HNiXizD9o2E0rLSRLd2t2iKWqxPrFicAfRHw1pBlvT0acwgowU5LXuzJW8YJ3/gJyM54zgR22B4Obvi0P4x7PwQaKb+ZRXNcHzzHS/ySks0EZT2XmO9x08= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768398376; c=relaxed/simple; bh=uscAv0ZOrJ7JzQOd3sbmaT4mGOxC0tA+wUUmeuMqHpg=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=d7w3nTHnHQZGVRHnqseX77s+vqE0lvM9a1PeNLL0qdMDMA3lni9YSweRjrusGqyrvFCeBPDF0vciSlBkR/SEjcLVeFZWj6qpeIqYZZ759UrVJ7K57MGlzifSQ3rHqgMimKItZ+SFQUOxjWnwRXR8VZYPZ4uQR+thZQ7hfmZ9XPA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk; spf=pass smtp.mailfrom=amazon.co.uk; dkim=pass (2048-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b=WmRSu3BR; arc=none smtp.client-ip=3.72.182.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b="WmRSu3BR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazoncorp2; t=1768398374; x=1799934374; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=Qx10YQyM1n7Bzq/TmzHM+nwXVd+92kjURQXs15/Kk1I=; b=WmRSu3BR1nTIoJuhhs2m8EhI56bICAl50ygry+WTM1D+cHr4cOuNIflh LdHg2C+UDPSTKPFPmjlCPETYouZjoMSjJ7L7Fw2D8h6g0TAniK2+RUFjM AxEpeTVyaFWtJudxSbEpFQgPCqgbBosJYyzcmq+UYNDShRGCjNV6jvHZO aicxyPjhn5wC/XUzzhLkCCIQIDFVunjJbXN3vsRb08hyhPVCA1Di0V16n T23r0eAYFWid+dG34bypQYOab0x1kCWAwDHeKqiftzrqMztzqB87WlyYB ajlLu/Shw4FlkzbOg0LxcHETV+s6FFqpIBVdCSuNpGnqQbmiJ/tS5eeA0 g==; X-CSE-ConnectionGUID: 6F6gMhRMTLC+B19uMUHjbw== X-CSE-MsgGUID: nq2OO95sS4WesM1K/I1Kjg== X-IronPort-AV: E=Sophos;i="6.21,225,1763424000"; d="scan'208";a="7899040" Received: from ip-10-6-11-83.eu-central-1.compute.internal (HELO smtpout.naws.eu-central-1.prod.farcaster.email.amazon.dev) ([10.6.11.83]) by internal-fra-out-003.esa.eu-central-1.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2026 13:46:11 +0000 Received: from EX19MTAEUC001.ant.amazon.com [54.240.197.225:23123] by smtpin.naws.eu-central-1.prod.farcaster.email.amazon.dev [10.0.6.3:2525] with esmtp (Farcaster) id 646304cb-9c48-4747-8d9d-d4686df9ea29; Wed, 14 Jan 2026 13:46:11 +0000 (UTC) X-Farcaster-Flow-ID: 646304cb-9c48-4747-8d9d-d4686df9ea29 Received: from EX19D005EUB002.ant.amazon.com (10.252.51.103) by EX19MTAEUC001.ant.amazon.com (10.252.51.155) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Wed, 14 Jan 2026 13:46:10 +0000 Received: from EX19D005EUB003.ant.amazon.com (10.252.51.31) by EX19D005EUB002.ant.amazon.com (10.252.51.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Wed, 14 Jan 2026 13:46:10 +0000 Received: from EX19D005EUB003.ant.amazon.com ([fe80::b825:becb:4b38:da0c]) by EX19D005EUB003.ant.amazon.com ([fe80::b825:becb:4b38:da0c%3]) with mapi id 15.02.2562.035; Wed, 14 Jan 2026 13:46:09 +0000 From: "Kalyazin, Nikita" To: "kvm@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.linux.dev" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "bpf@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , "kernel@xen0n.name" , "linux-riscv@lists.infradead.org" , "linux-s390@vger.kernel.org" , "loongarch@lists.linux.dev" CC: "pbonzini@redhat.com" , "corbet@lwn.net" , "maz@kernel.org" , "oupton@kernel.org" , "joey.gouly@arm.com" , "suzuki.poulose@arm.com" , "yuzenghui@huawei.com" , "catalin.marinas@arm.com" , "will@kernel.org" , "seanjc@google.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "luto@kernel.org" , "peterz@infradead.org" , "willy@infradead.org" , "akpm@linux-foundation.org" , "david@kernel.org" , "lorenzo.stoakes@oracle.com" , "Liam.Howlett@oracle.com" , "vbabka@suse.cz" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "ast@kernel.org" , "daniel@iogearbox.net" , "andrii@kernel.org" , "martin.lau@linux.dev" , "eddyz87@gmail.com" , "song@kernel.org" , "yonghong.song@linux.dev" , "john.fastabend@gmail.com" , "kpsingh@kernel.org" , "sdf@fomichev.me" , "haoluo@google.com" , "jolsa@kernel.org" , "jgg@ziepe.ca" , "jhubbard@nvidia.com" , "peterx@redhat.com" , "jannh@google.com" , "pfalcato@suse.de" , "shuah@kernel.org" , "riel@surriel.com" , "ryan.roberts@arm.com" , "jgross@suse.com" , "yu-cheng.yu@intel.com" , "kas@kernel.org" , "coxu@redhat.com" , "kevin.brodsky@arm.com" , "ackerleytng@google.com" , "maobibo@loongson.cn" , "prsampat@amd.com" , "mlevitsk@redhat.com" , "jmattson@google.com" , "jthoughton@google.com" , "agordeev@linux.ibm.com" , "alex@ghiti.fr" , "aou@eecs.berkeley.edu" , "borntraeger@linux.ibm.com" , "chenhuacai@kernel.org" , "dev.jain@arm.com" , "gor@linux.ibm.com" , "hca@linux.ibm.com" , "Jonathan.Cameron@huawei.com" , "palmer@dabbelt.com" , "pjw@kernel.org" , "shijie@os.amperecomputing.com" , "svens@linux.ibm.com" , "thuth@redhat.com" , "wyihan@google.com" , "yang@os.amperecomputing.com" , "vannapurve@google.com" , "jackmanb@google.com" , "aneesh.kumar@kernel.org" , "patrick.roy@linux.dev" , "Thomson, Jack" , "Itazuri, Takahiro" , "Manwaring, Derek" , "Cali, Marco" , "Kalyazin, Nikita" Subject: [PATCH v9 05/13] KVM: x86: define kvm_arch_gmem_supports_no_direct_map() Thread-Topic: [PATCH v9 05/13] KVM: x86: define kvm_arch_gmem_supports_no_direct_map() Thread-Index: AQHchVwjbMmxqTepZEW4NnK8Myz8WQ== Date: Wed, 14 Jan 2026 13:46:09 +0000 Message-ID: <20260114134510.1835-6-kalyazin@amazon.com> References: <20260114134510.1835-1-kalyazin@amazon.com> In-Reply-To: <20260114134510.1835-1-kalyazin@amazon.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Patrick Roy x86 supports GUEST_MEMFD_FLAG_NO_DIRECT_MAP whenever direct map modifications are possible (which is always the case). Signed-off-by: Patrick Roy Signed-off-by: Nikita Kalyazin Reviewed-by: Ackerley Tng --- arch/x86/include/asm/kvm_host.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index 5a3bfa293e8b..68bd29a52f24 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -28,6 +28,7 @@ #include #include #include +#include =20 #include #include @@ -2481,4 +2482,12 @@ static inline bool kvm_arch_has_irq_bypass(void) return enable_device_posted_irqs; } =20 +#ifdef CONFIG_KVM_GUEST_MEMFD +static inline bool kvm_arch_gmem_supports_no_direct_map(void) +{ + return can_set_direct_map(); +} +#define kvm_arch_gmem_supports_no_direct_map kvm_arch_gmem_supports_no_dir= ect_map +#endif /* CONFIG_KVM_GUEST_MEMFD */ + #endif /* _ASM_X86_KVM_HOST_H */ --=20 2.50.1