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(p200300cbc70dd800499c485ac734f290.dip0.t-ipconnect.de. [2003:cb:c70d:d800:499c:485a:c734:f290]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4318b5431ecsm45473185e9.5.2024.10.25.03.52.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Oct 2024 03:52:06 -0700 (PDT) Message-ID: Date: Fri, 25 Oct 2024 12:52:05 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/7] s390/physmem_info: query diag500(STORAGE LIMIT) to support QEMU/KVM memory devices To: Heiko Carstens , Eric Farman Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, virtualization@lists.linux.dev, linux-doc@vger.kernel.org, kvm@vger.kernel.org, Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Huth , Cornelia Huck , Janosch Frank , Claudio Imbrenda , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?Q?Eugenio_P=C3=A9rez?= , Andrew Morton , Jonathan Corbet , Mario Casquero References: <20241014144622.876731-1-david@redhat.com> <20241014144622.876731-5-david@redhat.com> <20241014184339.10447-E-hca@linux.ibm.com> <8131b905c61a7baf4bd09ec4a08e1ace84d36754.camel@linux.ibm.com> <20241015152008.7641-P-hca@linux.ibm.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: <20241015152008.7641-P-hca@linux.ibm.com> X-Mimecast-Spam-Score: 0 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: B51E5160026 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: r75187ef4ghmqwutfnqa4d8as1s71tt5 X-HE-Tag: 1729853519-298976 X-HE-Meta: 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 qnnKZHv7 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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 15.10.24 17:20, Heiko Carstens wrote: > On Tue, Oct 15, 2024 at 11:01:44AM -0400, Eric Farman wrote: >> On Mon, 2024-10-14 at 20:43 +0200, Heiko Carstens wrote: >>> On Mon, Oct 14, 2024 at 04:46:16PM +0200, David Hildenbrand wrote: > ... >>> +#define DIAG500_SC_STOR_LIMIT 4 > ... >> I like the idea of a defined constant here instead of hardcoded, but maybe it should be placed >> somewhere in include/uapi so that QEMU can pick it up with update-linux-headers.sh and be in sync >> with the kernel, instead of just an equivalent definition in [1] ? >> >> [1] https://lore.kernel.org/qemu-devel/20241008105455.2302628-8-david@redhat.com/ > > It is already a mess; we have already subcode 3 defined: > > #define KVM_S390_VIRTIO_CCW_NOTIFY 3 > > in > > arch/s390/include/uapi/asm/virtio-ccw.h > > which for some reason is uapi. But it doesn't make sense to put the > new subcode 4 there too. So what is the end result? > > Another uapi file? I think resolving this would be a project on its own. Agreed, thanks all! -- Cheers, David / dhildenb