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(p200300d82f4e3200c99da38b3f3ad4b3.dip0.t-ipconnect.de. [2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-429898ecadbsm5715926f8f.45.2025.10.23.12.36.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Oct 2025 12:36:52 -0700 (PDT) Message-ID: <60c55686-87dd-46d0-884e-80f7d423663b@redhat.com> Date: Thu, 23 Oct 2025 21:36:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() To: Kevin Brodsky , linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Alexander Gordeev , Andreas Larsson , Andrew Morton , Boris Ostrovsky , Borislav Petkov , Catalin Marinas , Christophe Leroy , Dave Hansen , "David S. Miller" , "H. Peter Anvin" , Ingo Molnar , Jann Horn , Juergen Gross , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , Peter Zijlstra , Ryan Roberts , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org References: <20251015082727.2395128-1-kevin.brodsky@arm.com> <20251015082727.2395128-4-kevin.brodsky@arm.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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+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: <20251015082727.2395128-4-kevin.brodsky@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 614m66ko4CrRgAtw6NGf5CyslQfeyh_glYhen-19si0_1761248215 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: j9bpbntmnccy6ko7o9r48zbmarttkr93 X-Rspamd-Queue-Id: 6D4A6C0008 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1761248218-838931 X-HE-Meta: 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 dSm+d5XZ +a2NTX1cVgYcj+yOvd8rQc6e1C2w0K/FmPbcNnp2EUxPEV/71TDm/RjIetgC0PxtF+PHzfOMMyth4oddTHc29nZe17AsttjeFIh7zQzDUtHs2yA2C8VW7xB49dbWEd9dwevCJW3QUfPxiVN8jB19XEbwpr0A4EhTosAaqdPi8gO2VfoOqB7i1+nt1pgNV0GpSxkk5lOT6ENLHy05/DaLRQzJTc0DZoUQI/CX5Kw5e13NqJL+XRypDQz9TA3fBPLomT923wgnK9FlSwC5+zUTLnk+ON6oS7IwBLLZo4dqtkM3s1pbH6FtJ1xQjUPm0aRRyVjzqENeXBAr2WqEnIDMblyUdo0CGAvCrXBMEJR/se8yEnkpTezaknqADsC6bJQ8TOc5T+yI8hfeMThKypRn9drUeo5n4qoTjHYie7fHoRKcUgnAhTFiSt8YWTcj3AhqTsy1oezZZmUuEZzqtNRtenKKETtrMOyUnyoacVBW8J+N0C8b38Y9FkcZ+ZvSSPuOpeC5+OUoBp5iI9cO/9aO9KFn5Nw== 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 15.10.25 10:27, Kevin Brodsky wrote: > Upcoming changes to the lazy_mmu API will cause > arch_flush_lazy_mmu_mode() to be called when leaving a nested > lazy_mmu section. > > Move the relevant logic from arch_leave_lazy_mmu_mode() to > arch_flush_lazy_mmu_mode() and have the former call the latter. > > Signed-off-by: Kevin Brodsky > --- > .../powerpc/include/asm/book3s/64/tlbflush-hash.h | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) > > diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h > index 146287d9580f..7704dbe8e88d 100644 > --- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h > +++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h > @@ -41,6 +41,16 @@ static inline void arch_enter_lazy_mmu_mode(void) > batch->active = 1; > } > > +static inline void arch_flush_lazy_mmu_mode(void) > +{ > + struct ppc64_tlb_batch *batch; > + > + batch = this_cpu_ptr(&ppc64_tlb_batch); The downside is the double this_cpu_ptr() now on the arch_leave_lazy_mmu_mode() path. You could just have a helper function that is called by either or just ... leave arch_leave_lazy_mmu_mode() alone and just replicate the two statements here in arch_flush_lazy_mmu_mode(). I would do just that :) -- Cheers David / dhildenb