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Mon, 13 Jun 2022 02:41:41 -0700 (PDT) X-Gm-Message-State: AOAM533Tc5pFgpBYsNqK/zqsvvqNoAsFLxkylZauEzMzPkzCXueg8ghP X323i8cF6z80p9J/9sYBk31DRUVXkfRxNiM6n84= X-Google-Smtp-Source: ABdhPJzJUE5eQIFQw1wDEuVAU3BsFccZwzLeam8ZSG5GUbrm7+bJ19w2hvDgq/MdVlhPhpH4bgTqWjWDxk7foXjlYlM= X-Received: by 2002:a05:6871:5c8:b0:f3:3c1c:126f with SMTP id v8-20020a05687105c800b000f33c1c126fmr7222252oan.126.1655113289866; Mon, 13 Jun 2022 02:41:29 -0700 (PDT) MIME-Version: 1.0 References: <20220613082147.183145-1-mawupeng1@huawei.com> <20220613082147.183145-3-mawupeng1@huawei.com> In-Reply-To: <20220613082147.183145-3-mawupeng1@huawei.com> From: Ard Biesheuvel Date: Mon, 13 Jun 2022 11:41:17 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v4 2/6] arm64/mirror: arm64 enabling - find mirrored memory ranges To: Wupeng Ma Cc: corbet@lwn.net, will@kernel.org, catalin.marinas@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, dvhart@infradead.org, andy@infradead.org, rppt@kernel.org, akpm@linux-foundation.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, paulmck@kernel.org, keescook@chromium.org, songmuchun@bytedance.com, rdunlap@infradead.org, damien.lemoal@opensource.wdc.com, swboyd@chromium.org, wei.liu@kernel.org, robin.murphy@arm.com, david@redhat.com, anshuman.khandual@arm.com, thunder.leizhen@huawei.com, wangkefeng.wang@huawei.com, gpiccoli@igalia.com, chenhuacai@kernel.org, geert@linux-m68k.org, vijayb@linux.microsoft.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org Content-Type: text/plain; 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dkim=pass header.d=kernel.org header.s=k20201202 header.b=EI79bY9m; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf17.hostedemail.com: domain of ardb@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=ardb@kernel.org X-HE-Tag: 1655113302-410663 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: On Mon, 13 Jun 2022 at 10:00, Wupeng Ma wrote: > > From: Ma Wupeng > > Commit b05b9f5f9dcf ("x86, mirror: x86 enabling - find mirrored memory ranges") > introduced mirrored memory support for x86 and this could be used on arm64. > > Since we only support this feature on arm64, efi_find_mirror() won't be placed > into efi_init(), which is used by riscv/arm/arm64, it is added in setup_arch() > to scan the memory map and mark mirrored memory in memblock. > > Signed-off-by: Ma Wupeng > Reviewed-by: Kefeng Wang > --- > Documentation/admin-guide/kernel-parameters.txt | 2 +- > arch/arm64/kernel/setup.c | 1 + > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 8090130b544b..e3537646b6f7 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -2301,7 +2301,7 @@ > > keepinitrd [HW,ARM] > > - kernelcore= [KNL,X86,IA-64,PPC] > + kernelcore= [KNL,X86,IA-64,PPC,ARM64] > Format: nn[KMGTPE] | nn% | "mirror" > This parameter specifies the amount of memory usable by > the kernel for non-movable allocations. The requested > diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c > index cf3a759f10d4..6e9acd7ecf0f 100644 > --- a/arch/arm64/kernel/setup.c > +++ b/arch/arm64/kernel/setup.c > @@ -328,6 +328,7 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p) > > xen_early_init(); > efi_init(); > + efi_find_mirror(); > > if (!efi_enabled(EFI_BOOT) && ((u64)_text % MIN_KIMG_ALIGN) != 0) > pr_warn(FW_BUG "Kernel image misaligned at boot, please fix your bootloader!"); As suggested by Kefeng Wang, I think this call needs to be moved into efi_init() [the generic version] Please drop this hunk, and add this call to efi_init() in patch #1.