From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com (fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com [63.176.194.123]) (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 774C52FE595; Mon, 26 Jan 2026 16:50:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=63.176.194.123 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769446232; cv=none; b=kp6dFmO7J0DXo/lvWvQcEc7RByFANJV6auVqiwDkY7TDKfUtQEHFhiPoGyNQMaWlRGeVsrLe1lq37RVgvhlmSTPdv/o8dWnYYg2h2WWYGUgbC3pEL+WlWkjgtQ+jqqyyTtox703bt0JQS980MnPraRJ280QJ2VP79ggqf9Iqi1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769446232; c=relaxed/simple; bh=1dw0E5Mdvpwex3b0vbSr/43eqeKKJIAKQ475wBppi4E=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=GQc5iBqsbxraS4AWSUMthzgXNnCtMSFoQ6+WpUWW9O3VYzikKzrmr5RuDDQQ3rZqRfbAOXWrd/Dek9IbsOMMsM7ff5bqgkmtEDARBoJ1pH+uBSowUCrfW1H7k6IQKiWdrtV8Rtcam8JPHo2WWx/4pguKgPOZjQdSb/SnVLhu2FE= 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=TlN0zOkG; arc=none smtp.client-ip=63.176.194.123 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="TlN0zOkG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazoncorp2; t=1769446230; x=1800982230; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=rs2OSpPUD7LW69rM0Y32fiRw8ksGft8hlxMn679P0dQ=; b=TlN0zOkGY4s8OkyzjTtES2MuPvJQkBA4SaaXQORqAe6Y6emkppN7NiBm WYVU7WIqyv8R2AIQ3lNvjSX6stYYR8TleH2cuSsH/ijbDH1N1XrZ6HbTC ojGhRKEyYDgXrfstULeP/X7+JgTknBYsqaG576iLJvbMQszBw5DfnIbpc HaGgMYALFTFbSqCyoN7sHkHd2CLA9rwE72yZYvqS2AIwjdn05FI1+c7sd fj3n6Nj+QMSGzkyhVKwcpIMZK2oAbHHyBspkWgKIFITnuD8dYlry2eSwW 8SBeuKuJsUPZY0PU7Ja2XDgSSwnxz1NwBbbxm463t2q+0GyU+zm6hcevd w==; X-CSE-ConnectionGUID: tfQw3dF6SUeRkOjQ65gfrA== X-CSE-MsgGUID: /o96abYjSkCEh36gM1Jw7Q== X-IronPort-AV: E=Sophos;i="6.21,255,1763424000"; d="scan'208";a="8462640" Received: from ip-10-6-3-216.eu-central-1.compute.internal (HELO smtpout.naws.eu-central-1.prod.farcaster.email.amazon.dev) ([10.6.3.216]) by internal-fra-out-005.esa.eu-central-1.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2026 16:50:10 +0000 Received: from EX19MTAEUA001.ant.amazon.com [54.240.197.233:6667] by smtpin.naws.eu-central-1.prod.farcaster.email.amazon.dev [10.0.12.85:2525] with esmtp (Farcaster) id 28592ed3-d374-496c-8ee1-bd4e5c4b28cf; Mon, 26 Jan 2026 16:50:09 +0000 (UTC) X-Farcaster-Flow-ID: 28592ed3-d374-496c-8ee1-bd4e5c4b28cf Received: from EX19D005EUB001.ant.amazon.com (10.252.51.12) by EX19MTAEUA001.ant.amazon.com (10.252.50.192) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Mon, 26 Jan 2026 16:50:09 +0000 Received: from EX19D005EUB003.ant.amazon.com (10.252.51.31) by EX19D005EUB001.ant.amazon.com (10.252.51.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Mon, 26 Jan 2026 16:50:08 +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; Mon, 26 Jan 2026 16:50:08 +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@kernel.org" , "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" , "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" , "palmer@dabbelt.com" , "pjw@kernel.org" , "shijie@os.amperecomputing.com" , "svens@linux.ibm.com" , "thuth@redhat.com" , "wyihan@google.com" , "yang@os.amperecomputing.com" , "Jonathan.Cameron@huawei.com" , "Liam.Howlett@oracle.com" , "urezki@gmail.com" , "zhengqi.arch@bytedance.com" , "gerald.schaefer@linux.ibm.com" , "jiayuan.chen@shopee.com" , "lenb@kernel.org" , "osalvador@suse.de" , "pavel@kernel.org" , "rafael@kernel.org" , "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 v10 07/15] KVM: x86: define kvm_arch_gmem_supports_no_direct_map() Thread-Topic: [PATCH v10 07/15] KVM: x86: define kvm_arch_gmem_supports_no_direct_map() Thread-Index: AQHcjuPUUjWyeqat5Ey1EmCCP9Dgog== Date: Mon, 26 Jan 2026 16:50:08 +0000 Message-ID: <20260126164445.11867-8-kalyazin@amazon.com> References: <20260126164445.11867-1-kalyazin@amazon.com> In-Reply-To: <20260126164445.11867-1-kalyazin@amazon.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Patrick Roy =0A= =0A= x86 supports GUEST_MEMFD_FLAG_NO_DIRECT_MAP whenever direct map=0A= modifications are possible (which is always the case).=0A= =0A= Signed-off-by: Patrick Roy =0A= Reviewed-by: Ackerley Tng =0A= Signed-off-by: Nikita Kalyazin =0A= ---=0A= arch/x86/include/asm/kvm_host.h | 9 +++++++++=0A= 1 file changed, 9 insertions(+)=0A= =0A= diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h=0A= index 5a3bfa293e8b..68bd29a52f24 100644=0A= --- a/arch/x86/include/asm/kvm_host.h=0A= +++ b/arch/x86/include/asm/kvm_host.h=0A= @@ -28,6 +28,7 @@=0A= #include =0A= #include =0A= #include =0A= +#include =0A= =0A= #include =0A= #include =0A= @@ -2481,4 +2482,12 @@ static inline bool kvm_arch_has_irq_bypass(void)=0A= return enable_device_posted_irqs;=0A= }=0A= =0A= +#ifdef CONFIG_KVM_GUEST_MEMFD=0A= +static inline bool kvm_arch_gmem_supports_no_direct_map(void)=0A= +{=0A= + return can_set_direct_map();=0A= +}=0A= +#define kvm_arch_gmem_supports_no_direct_map kvm_arch_gmem_supports_no_dir= ect_map=0A= +#endif /* CONFIG_KVM_GUEST_MEMFD */=0A= +=0A= #endif /* _ASM_X86_KVM_HOST_H */=0A= -- =0A= 2.50.1=0A= =0A=