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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7535BC5B543 for ; Thu, 5 Jun 2025 15:49:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0F7966B05CD; Thu, 5 Jun 2025 11:49:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0CFAA6B05CE; Thu, 5 Jun 2025 11:49:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ED9D06B05D2; Thu, 5 Jun 2025 11:49:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id CF53A6B05CD for ; Thu, 5 Jun 2025 11:49:09 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 7DEC780E74 for ; Thu, 5 Jun 2025 15:49:09 +0000 (UTC) X-FDA: 83521780818.13.143191F Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf02.hostedemail.com (Postfix) with ESMTP id EC8408000D for ; Thu, 5 Jun 2025 15:49:06 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=TMsfx9df; spf=pass (imf02.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1749138547; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ysJoE7XfT1A5tdrysWCWchWteLaSJ+QmQ6w3ErFhmQs=; b=urSlzyvOOu5R++NZpwO4vzG2M1x7su7c2nQ0H96U2D0teFrRSA3YJ2tmGaGboA7eQGf1R0 rMCiiLotjysID7t1aVBzVVNuNIRueEm3ObAIPIbIXXJ6As5DIETIsjpU1MxiYOhZopmgB3 2HUY+Y/SYHtQ5YQRuOu2l7DQwfcoOHk= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=TMsfx9df; spf=pass (imf02.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1749138547; a=rsa-sha256; cv=none; b=7nEue1uB0sTuF87ibSPc2OujYHYSOVclCeYTx/vwA+i1IbR0JmNPvSIq9RUZn+hSyw48HD pg7DTDuoILCvrMHxap6hXXhEwXoc3Tmc1TkHU2+0pJ4atCBpWGSIiI7tr4i8AujYOPwcf/ 4bn7YT4CZztv73VmBJ6wdJ2yTbEG0h8= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1749138546; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=ysJoE7XfT1A5tdrysWCWchWteLaSJ+QmQ6w3ErFhmQs=; b=TMsfx9dfZQIoxDhBh4ukEoMHXJzGxTJ42wExD+SkpoljUNU73aeULdjVc4urKh5gNk4WYA fqq0e0ch/11uxknRsQ87dQyNTymbHS69B15vkCEPfgBkFJoYFzKgQ6fQHg0TXpDjZZnBRL fKBfNi9rLMNytiaJjED60QeGGNZEhyw= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-669-MN_d4tVANK-zAYuM1fHRtg-1; Thu, 05 Jun 2025 11:49:05 -0400 X-MC-Unique: MN_d4tVANK-zAYuM1fHRtg-1 X-Mimecast-MFC-AGG-ID: MN_d4tVANK-zAYuM1fHRtg_1749138544 Received: by mail-wr1-f70.google.com with SMTP id ffacd0b85a97d-3a4f3796779so824881f8f.1 for ; Thu, 05 Jun 2025 08:49:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749138544; x=1749743344; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=ysJoE7XfT1A5tdrysWCWchWteLaSJ+QmQ6w3ErFhmQs=; b=kfKnUiveTX2JC+lBv7M4MyvRZTiZOjADQP4Nx4bu388iSIazpBr0UVcwwqw9h7wN6i Mly2afgxqgG9Zyz6JuilIi53QngPfcCj/jCHzpUO88fdOdXVBsrXjCozyMUatD+4q7Hm oNmzCdBvVIb8waur4QyzxRtxcSqNN56CmVFrTth3u+AMCM35K3Dudkn5lyP1Cm5LDiHI r/otqyQfqBdAFDUvyb6R8Cia5v20oA2z94+A1144AZevMpHNb27JzL3oKQnUU693DJtc GTdcH8TJcreNsFwmpXrBXJtsf9MDTXaR2+af+TWyBMJnkKyxlhZg4B/6gojE360CE5hJ rYhA== X-Forwarded-Encrypted: i=1; AJvYcCWR10AMyz+vIiDuGuQuTwcC0VzkYd+aevodOWemlu/d4Tyjjefva7qZtoaNe22gLoXzKzEWWVjNqg==@kvack.org X-Gm-Message-State: AOJu0YwDaCiUComwH4KVFujef0bcQKH9pGqdg0/Dw0/Lac8suFmdwxbR U2i6Kk7G7IVCNZ4YMEN612U/lzas9LaWxcVRC73LD83JKaI1PAQf8PPEdocPFu+Gwv4tJHUfDTV f8DXmUBRaS8bXUF3f/bjy1r3p3WbS4pAjPmDQAZ6npFmPWvATz9Vv X-Gm-Gg: ASbGncsNSaNaG/YVZS0oY/CytYCXOAxMlh2eJuvBK0YLr43MWrVV0/aPpbOgZKMasKx wc+BcpkAu9FO4hbVnVaWF2M7DRjUZz5kVr23sHnSNkC4wIfvbHFBL0idzBRUTGjN2fZ83HOAm9j epOft5iwYGb9MrCLpHbwj1OJkyOv/ztreDpLFE5qJFv10Sa6xeOp4NgXg9veBC0CM2GzcwB9jxS 6pJ12km9/ZimC5FeEPZASWZzecHshcnkp3zLo5KNtt2Vb4Ti+SHlf3LApu/6EJ5pbQnbvKmpgyu Zr+DVVa2+iU9KuK4A4fV0A0p1ZDEO+obHy7cOMIJdF/bDV+5tYiPhv2EMeFKsu17qnWDjIElF++ G4lv4qhuN1AR89lI8cvwHBkZfBviatlm7Ua3+/XR3ny0bE7E= X-Received: by 2002:a05:6000:401e:b0:3a4:fe9d:1b10 with SMTP id ffacd0b85a97d-3a51d976f74mr6676958f8f.45.1749138543860; Thu, 05 Jun 2025 08:49:03 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGRFPGBK7zFkICtEVikQ7T+tn2BS+pM+SiEyoCb6szDDevFRYWd/PLHjWJsZvRYrIl0D18/Vw== X-Received: by 2002:a05:6000:401e:b0:3a4:fe9d:1b10 with SMTP id ffacd0b85a97d-3a51d976f74mr6676893f8f.45.1749138543387; Thu, 05 Jun 2025 08:49:03 -0700 (PDT) Received: from ?IPV6:2003:d8:2f27:ec00:4f4d:d38:ba97:9aa2? (p200300d82f27ec004f4d0d38ba979aa2.dip0.t-ipconnect.de. [2003:d8:2f27:ec00:4f4d:d38:ba97:9aa2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-451fb169412sm22609415e9.5.2025.06.05.08.49.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Jun 2025 08:49:02 -0700 (PDT) Message-ID: <4909d6dc-09f5-4960-b8be-5150b2a03e45@redhat.com> Date: Thu, 5 Jun 2025 17:49:00 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 12/18] KVM: x86: Enable guest_memfd shared memory for SW-protected VMs To: Fuad Tabba , kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org, kvmarm@lists.linux.dev Cc: pbonzini@redhat.com, chenhuacai@kernel.org, mpe@ellerman.id.au, anup@brainfault.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, viro@zeniv.linux.org.uk, brauner@kernel.org, willy@infradead.org, akpm@linux-foundation.org, xiaoyao.li@intel.com, yilun.xu@intel.com, chao.p.peng@linux.intel.com, jarkko@kernel.org, amoorthy@google.com, dmatlack@google.com, isaku.yamahata@intel.com, mic@digikod.net, vbabka@suse.cz, vannapurve@google.com, ackerleytng@google.com, mail@maciej.szmigiero.name, michael.roth@amd.com, wei.w.wang@intel.com, liam.merwick@oracle.com, isaku.yamahata@gmail.com, kirill.shutemov@linux.intel.com, suzuki.poulose@arm.com, steven.price@arm.com, quic_eberman@quicinc.com, quic_mnalajal@quicinc.com, quic_tsoni@quicinc.com, quic_svaddagi@quicinc.com, quic_cvanscha@quicinc.com, quic_pderrin@quicinc.com, quic_pheragu@quicinc.com, catalin.marinas@arm.com, james.morse@arm.com, yuzenghui@huawei.com, oliver.upton@linux.dev, maz@kernel.org, will@kernel.org, qperret@google.com, keirf@google.com, roypat@amazon.co.uk, shuah@kernel.org, hch@infradead.org, jgg@nvidia.com, rientjes@google.com, jhubbard@nvidia.com, fvdl@google.com, hughd@google.com, jthoughton@google.com, peterx@redhat.com, pankaj.gupta@amd.com, ira.weiny@intel.com References: <20250605153800.557144-1-tabba@google.com> <20250605153800.557144-13-tabba@google.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250605153800.557144-13-tabba@google.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: FJvV6rdDbyJmAtmq09OvAMUs7Vy6c3QgNxleVT7ZUbg_1749138544 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: EC8408000D X-Stat-Signature: 66eyptp3bnwz9q87nnatzp4wu8n53zhy X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1749138546-502263 X-HE-Meta: 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 YrJBavBf 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 05.06.25 17:37, Fuad Tabba wrote: > Define the architecture-specific macro to enable shared memory support > in guest_memfd for relevant software-only VM types, specifically > KVM_X86_DEFAULT_VM and KVM_X86_SW_PROTECTED_VM. > > Enable the KVM_GMEM_SHARED_MEM Kconfig option if KVM_SW_PROTECTED_VM is > enabled. > > Co-developed-by: Ackerley Tng > Signed-off-by: Ackerley Tng > Signed-off-by: Fuad Tabba > --- > arch/x86/include/asm/kvm_host.h | 10 ++++++++++ > arch/x86/kvm/Kconfig | 1 + > arch/x86/kvm/x86.c | 3 ++- > 3 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index 709cc2a7ba66..ce9ad4cd93c5 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -2255,8 +2255,18 @@ void kvm_configure_mmu(bool enable_tdp, int tdp_forced_root_level, > > #ifdef CONFIG_KVM_GMEM > #define kvm_arch_supports_gmem(kvm) ((kvm)->arch.supports_gmem) > + > +/* > + * CoCo VMs with hardware support that use guest_memfd only for backing private > + * memory, e.g., TDX, cannot use guest_memfd with userspace mapping enabled. > + */ > +#define kvm_arch_supports_gmem_shared_mem(kvm) \ > + (IS_ENABLED(CONFIG_KVM_GMEM_SHARED_MEM) && \ > + ((kvm)->arch.vm_type == KVM_X86_SW_PROTECTED_VM || \ > + (kvm)->arch.vm_type == KVM_X86_DEFAULT_VM)) > #else > #define kvm_arch_supports_gmem(kvm) false > +#define kvm_arch_supports_gmem_shared_mem(kvm) false > #endif > > #define kvm_arch_has_readonly_mem(kvm) (!(kvm)->arch.has_protected_state) > diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig > index b37258253543..fdf24b50af9d 100644 > --- a/arch/x86/kvm/Kconfig > +++ b/arch/x86/kvm/Kconfig > @@ -47,6 +47,7 @@ config KVM_X86 > select KVM_GENERIC_HARDWARE_ENABLING > select KVM_GENERIC_PRE_FAULT_MEMORY > select KVM_GENERIC_GMEM_POPULATE if KVM_SW_PROTECTED_VM > + select KVM_GMEM_SHARED_MEM if KVM_SW_PROTECTED_VM > select KVM_WERROR if WERROR Is $subject and this still true, given that it's now also supported for KVM_X86_DEFAULT_VM? -- Cheers, David / dhildenb