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b=Fc/RrrcGDCUxYlfeihZzaqYQwrGJNeYiTfH/n7zDP/k7lfTYXQvLvLgLBtuzianPj S5Jop75QzJ0tKyT/43Iz2gxV3m6OCCGAzisSYTAiAJRI70aVq/kkIB48moj723X/EZ 5gibgbmcLLqEMQkYdKOhKb9SAqCrv4T5DGFePJhCnQKXDYJUcfPOgc6DJAu/hGQ4fW euAbzkkRsyUKDpAj/AZj2W8lDJdSXr2Lzn/zyZeXgzqAGg3uoJWpowBu1Ojye3wYnP pM3n+6Z8YPn23nW7qZXDl+XLfS94oV8Lll0PWTf4ITnFLCyDRPRhwec7vTZeY/0BbI GyVZqxDDf4Zng== Message-ID: <2f7a38e0-1e85-4983-9bc5-adea49f44cbc@kernel.org> Date: Thu, 1 Oct 2026 09:45:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC] mm: Add KUNIT test for ptval_bytes_to_hex_str() To: Anshuman Khandual , linux-mm@kvack.org Cc: Andrew Morton , Lorenzo Stoakes , linux-kernel@vger.kernel.org References: <20260929120530.3394073-1-anshuman.khandual@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260929120530.3394073-1-anshuman.khandual@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: 7n5yhrzjbh6fwrhx6qn7zqtdfzh5nqkp X-Rspamd-Queue-Id: DC73D40005 X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1790840706-730458 X-HE-Meta: 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 dkPYSbwD 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/29/26 14:05, Anshuman Khandual wrote: > Add KUnit tests for ptval_bytes_to_hex_str() to verify conversion of 32-bit > 64-bit, and 128-bit (when supported) page table entry values into printable > hexadecimal strings. > > Add a new PTVAL_HEX_STR_KUNIT_TEST option to enable the tests. > > Cc: Andrew Morton > Cc: David Hildenbrand > Cc: Lorenzo Stoakes > Cc: linux-kernel@vger.kernel.org > Cc: linux-mm@kvack.org > Signed-off-by: Anshuman Khandual > --- > This patch applies on v7.3-rc5 after the following series > > https://lore.kernel.org/linux-mm/20260831054331.625505-1-anshuman.khandual@arm.com/ > > mm/Kconfig | 11 +++ > mm/Makefile | 1 + > mm/tests/ptval_hex_string_kunit.c | 111 ++++++++++++++++++++++++++++++ > 3 files changed, 123 insertions(+) > create mode 100644 mm/tests/ptval_hex_string_kunit.c > > diff --git a/mm/Kconfig b/mm/Kconfig > index 604c58199acbf..f68bf26b98c83 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -1511,6 +1511,17 @@ config LAZY_MMU_MODE_KUNIT_TEST > > If unsure, say N. > > +config PTVAL_HEX_STR_KUNIT_TEST > + bool "KUnit tests for pgtable entry string conversion" if !KUNIT_ALL_TESTS > + depends on KUNIT > + default KUNIT_ALL_TESTS > + help > + Enable this option to check that ptval_bytes_to_hex_str() is able > + convert given pgtable entry value in bytes into hex strings which > + could be printed. > + > + If unsure, say N. That's a bit fine grained :) Could we somehow pack this under another existing / more generic test? We don't want one new test for every new function :) An alternative would be to use mm/debug_vm_pgtable.c to just run 3 tests at runtime as well. > + > source "mm/damon/Kconfig" > > endmenu > diff --git a/mm/Makefile b/mm/Makefile > index e7245cb88c665..d08b8bd01917b 100644 > --- a/mm/Makefile > +++ b/mm/Makefile > @@ -147,4 +147,5 @@ obj-$(CONFIG_SHRINKER_DEBUG) += shrinker_debug.o > obj-$(CONFIG_EXECMEM) += execmem.o > obj-$(CONFIG_TMPFS_QUOTA) += shmem_quota.o > obj-$(CONFIG_LAZY_MMU_MODE_KUNIT_TEST) += tests/lazy_mmu_mode_kunit.o > +obj-$(CONFIG_PTVAL_HEX_STR_KUNIT_TEST) += tests/ptval_hex_string_kunit.o > obj-$(CONFIG_MEM_ALLOC_PROFILING) += alloc_tag.o > diff --git a/mm/tests/ptval_hex_string_kunit.c b/mm/tests/ptval_hex_string_kunit.c > new file mode 100644 > index 0000000000000..45c203cfb49ae > --- /dev/null > +++ b/mm/tests/ptval_hex_string_kunit.c > @@ -0,0 +1,111 @@ > +// SPDX-License-Identifier: GPL-2.0 > + > +#include > +#include > + > +struct ptval_str { > + u64 val; > + const char *str; > +}; > + > +static struct ptval_str ptval_u32_tests[] = { > + { .val = 0x1234abcd, .str = "1234abcd"}, Isn't a single test like this enough. Why would we need the other ones? So I think this could all get condensed quite a bit (including the test functions, a single one should be sufficient if we really only end up with 3 tests). -- Cheers, David