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[73.69.118.222]) by smtp.gmail.com with ESMTPSA id az6sm3312891qkb.70.2021.09.16.16.13.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Sep 2021 16:13:46 -0700 (PDT) From: Pasha 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, kernelfans@gmail.com, akpm@linux-foundation.org, madvenka@linux.microsoft.com Subject: [PATCH v17 13/15] arm64: kexec: remove the pre-kexec PoC maintenance Date: Thu, 16 Sep 2021 19:13:23 -0400 Message-Id: <20210916231325.125533-14-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210916231325.125533-1-pasha.tatashin@soleen.com> References: <20210916231325.125533-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9A8A510001C8 X-Stat-Signature: ekgyjgmfw9a5895d6gnyb5zpns5j55k9 Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=soleen.com header.s=google header.b=M5CTfZo1; spf=pass (imf07.hostedemail.com: domain of pasha.tatashin@soleen.com designates 209.85.160.170 as permitted sender) smtp.mailfrom=pasha.tatashin@soleen.com; dmarc=none X-HE-Tag: 1631834027-168158 Content-Transfer-Encoding: quoted-printable 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: Now that kexec does its relocations with the MMU enabled, we no longer need to clean the relocation data to the PoC. Suggested-by: James Morse Signed-off-by: Pasha Tatashin --- arch/arm64/kernel/machine_kexec.c | 43 ------------------------------- 1 file changed, 43 deletions(-) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machin= e_kexec.c index b43195a7fcb6..b1856f34cc51 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -77,48 +77,6 @@ int machine_kexec_prepare(struct kimage *kimage) return 0; } =20 -/** - * kexec_list_flush - Helper to flush the kimage list and source pages t= o PoC. - */ -static void kexec_list_flush(struct kimage *kimage) -{ - kimage_entry_t *entry; - - dcache_clean_inval_poc((unsigned long)kimage, - (unsigned long)kimage + sizeof(*kimage)); - - for (entry =3D &kimage->head; ; entry++) { - unsigned int flag; - unsigned long addr; - - /* flush the list entries. */ - dcache_clean_inval_poc((unsigned long)entry, - (unsigned long)entry + - sizeof(kimage_entry_t)); - - flag =3D *entry & IND_FLAGS; - if (flag =3D=3D IND_DONE) - break; - - addr =3D (unsigned long)phys_to_virt(*entry & PAGE_MASK); - - switch (flag) { - case IND_INDIRECTION: - /* Set entry point just before the new list page. */ - entry =3D (kimage_entry_t *)addr - 1; - break; - case IND_SOURCE: - /* flush the source pages. */ - dcache_clean_inval_poc(addr, addr + PAGE_SIZE); - break; - case IND_DESTINATION: - break; - default: - BUG(); - } - } -} - /** * kexec_segment_flush - Helper to flush the kimage segments to PoC. */ @@ -207,7 +165,6 @@ int machine_kexec_post_load(struct kimage *kimage) (unsigned long)reloc_code + reloc_size); icache_inval_pou((uintptr_t)reloc_code, (uintptr_t)reloc_code + reloc_size); - kexec_list_flush(kimage); kexec_image_info(kimage); =20 return 0; --=20 2.25.1