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Shutemov" To: Dave Hansen , Andy Lutomirski , Peter Zijlstra Cc: x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , Bharata B Rao , Jacob Pan , Ashok Raj , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH 1/2] x86/mm/iommu/sva: Fix error code for LAM enabling failure due to SVA Date: Mon, 3 Apr 2023 14:10:19 +0300 Message-Id: <20230403111020.3136-2-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230403111020.3136-1-kirill.shutemov@linux.intel.com> References: <20230403111020.3136-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: B279F4001C X-Stat-Signature: idk7oj6j33dmtoikk99sho5n8yw9dmyp X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1680520233-922195 X-HE-Meta: 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 PYGSPoEW A2jv6Nh3Uuyis6yskUEduxplPHgs/G23WR1B+TA59n0nR3jzcHgj5j9ZkUut4AAOLzM5th4/AkGSZeVehV/Eu3kdDmGv5KpmCABkfTrMeoLmuKs+fq8NiAjoMFyRels/xmoX6QKozpI/uL38wqxWey7bdOcyQhy12w9wAr9L2/vM4S8qKfz7WpmACx76PTW3LNJMXvGCDIj5RrqOYsyqdKmS83POr0mrOes8dFTlJPWwoBVVXcgbm3hxKZPFJ+8SM2MJb 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: Normally, LAM and SVA are mutually exclusive. LAM enabling will fail if SVA is already in use. Correct error code for the failure. EINTR is nonsensical there. Signed-off-by: Kirill A. Shutemov Fixes: 23e5d9ec2bab ("x86/mm/iommu/sva: Make LAM and SVA mutually exclusive") Reported-by: Dmitry Vyukov --- arch/x86/kernel/process_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 74c7e84a94d8..c7dfd727c9ec 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -760,7 +760,7 @@ static int prctl_enable_tagged_addr(struct mm_struct *mm, unsigned long nr_bits) if (mm_valid_pasid(mm) && !test_bit(MM_CONTEXT_FORCE_TAGGED_SVA, &mm->context.flags)) - return -EINTR; + return -EINVAL; if (mmap_write_lock_killable(mm)) return -EINTR; -- 2.39.2