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Fri, 28 Nov 2025 03:34:34 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D8E4419560B0; Fri, 28 Nov 2025 03:34:26 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 07/12] arch/powerpc: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:15 +0800 Message-ID: <20251128033320.1349620-8-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspamd-Queue-Id: E561080002 X-Rspamd-Server: rspam02 X-Stat-Signature: 8kixx6ttb56irz3wka3gy7zmsp7qqzz5 X-Rspam-User: X-HE-Tag: 1764300880-595387 X-HE-Meta: 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 TIRB3kyb aBEQA4/JJakdiVa9Nibv6zUZWslNw/IAcRbnLnG9B3rSwma+D5ZeVYrFBpjwwJ9oaIPQ/1H3SD7F2cUJhG38GeiplB/r52Brrgs5un6c1lLFTJz+0Tkpc1kFOpDqzvZpiewh6AkgqzScTU1FjAEUnA6GK5IBC3S5neV1iGvJKuVCTKs1w9/MuGEWVTnVkUKKUM6wCjwMj9t0RjOX2kyRmBpFoi1wU8uQQiKQPQr4JbOLfOMsXOCaH7W3qF3cp0wSIl78R8wxCq8XozHVdi4tbelpXFnMsmH6Pu44T14QOSZelvT+Z1tieupEF9TkhrIXjWpSX5Em/EMcRIjEiLX1qIwV4SYF2uoBcgMt0drd0WDJJUzxAquGnKSlEZ4hRkCSyiYcEykXhvvrMb8u5WrRR63ISqGRQQac3FLlfx+2XBY5IAP7yBIUBlzhhwlALoSBQsRSydQ+7FYnStZY= 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: This includes 32bit, book3s/64 and book3e/64. Signed-off-by: Baoquan He Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/mm/kasan/init_32.c | 5 ++++- arch/powerpc/mm/kasan/init_book3e_64.c | 3 +++ arch/powerpc/mm/kasan/init_book3s_64.c | 3 +++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/kasan/init_32.c b/arch/powerpc/mm/kasan/init_32.c index 1d083597464f..b0651ff9d44d 100644 --- a/arch/powerpc/mm/kasan/init_32.c +++ b/arch/powerpc/mm/kasan/init_32.c @@ -141,6 +141,9 @@ void __init kasan_init(void) u64 i; int ret; + if (kasan_arg_disabled) + return; + for_each_mem_range(i, &base, &end) { phys_addr_t top = min(end, total_lowmem); @@ -170,7 +173,7 @@ void __init kasan_init(void) void __init kasan_late_init(void) { - if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) + if (IS_ENABLED(CONFIG_KASAN_VMALLOC) && kasan_enabled()) kasan_unmap_early_shadow_vmalloc(); } diff --git a/arch/powerpc/mm/kasan/init_book3e_64.c b/arch/powerpc/mm/kasan/init_book3e_64.c index 0d3a73d6d4b0..f75c1e38a011 100644 --- a/arch/powerpc/mm/kasan/init_book3e_64.c +++ b/arch/powerpc/mm/kasan/init_book3e_64.c @@ -111,6 +111,9 @@ void __init kasan_init(void) u64 i; pte_t zero_pte = pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL_RO); + if (kasan_arg_disabled) + return; + for_each_mem_range(i, &start, &end) kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end)); diff --git a/arch/powerpc/mm/kasan/init_book3s_64.c b/arch/powerpc/mm/kasan/init_book3s_64.c index dcafa641804c..8c6940e835d4 100644 --- a/arch/powerpc/mm/kasan/init_book3s_64.c +++ b/arch/powerpc/mm/kasan/init_book3s_64.c @@ -54,6 +54,9 @@ void __init kasan_init(void) u64 i; pte_t zero_pte = pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL); + if (kasan_arg_disabled) + return; + if (!early_radix_enabled()) { pr_warn("KASAN not enabled as it requires radix!"); return; -- 2.41.0