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[73.69.118.222]) by smtp.gmail.com with ESMTPSA id r3sm16690512qkm.129.2021.03.02.16.22.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Mar 2021 16:22:53 -0800 (PST) From: Pavel Tatashin To: pasha.tatashin@soleen.com, jmorris@namei.org, sashal@kernel.org, ebiederm@xmission.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, corbet@lwn.net, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, maz@kernel.org, james.morse@arm.com, vladimir.murzin@arm.com, matthias.bgg@gmail.com, linux-mm@kvack.org, mark.rutland@arm.com, steve.capper@arm.com, rfontana@redhat.com, tglx@linutronix.de, selindag@gmail.com, tyhicks@linux.microsoft.com Subject: [PATCH v12 16/17] arm64: kexec: remove the pre-kexec PoC maintenance Date: Tue, 2 Mar 2021 19:22:29 -0500 Message-Id: <20210303002230.1083176-17-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210303002230.1083176-1-pasha.tatashin@soleen.com> References: <20210303002230.1083176-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that kexec does its relocations with the MMU enabled, we no longer need to clean the relocation data to the PoC. Co-developed-by: James Morse Signed-off-by: Pavel Tatashin --- arch/arm64/kernel/machine_kexec.c | 40 ------------------------------- 1 file changed, 40 deletions(-) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index d5c8aefc66f3..a1c9bee0cddd 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -76,45 +76,6 @@ int machine_kexec_prepare(struct kimage *kimage) return 0; } -/** - * kexec_list_flush - Helper to flush the kimage list and source pages to PoC. - */ -static void kexec_list_flush(struct kimage *kimage) -{ - kimage_entry_t *entry; - - __flush_dcache_area(kimage, sizeof(*kimage)); - - for (entry = &kimage->head; ; entry++) { - unsigned int flag; - void *addr; - - /* flush the list entries. */ - __flush_dcache_area(entry, sizeof(kimage_entry_t)); - - flag = *entry & IND_FLAGS; - if (flag == IND_DONE) - break; - - addr = phys_to_virt(*entry & PAGE_MASK); - - switch (flag) { - case IND_INDIRECTION: - /* Set entry point just before the new list page. */ - entry = (kimage_entry_t *)addr - 1; - break; - case IND_SOURCE: - /* flush the source pages. */ - __flush_dcache_area(addr, PAGE_SIZE); - break; - case IND_DESTINATION: - break; - default: - BUG(); - } - } -} - /** * kexec_segment_flush - Helper to flush the kimage segments to PoC. */ @@ -200,7 +161,6 @@ int machine_kexec_post_load(struct kimage *kimage) __flush_dcache_area(reloc_code, reloc_size); flush_icache_range((uintptr_t)reloc_code, (uintptr_t)reloc_code + reloc_size); - kexec_list_flush(kimage); kexec_image_info(kimage); return 0; -- 2.25.1