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Wed, 27 Jan 2021 10:26:19 +0000 (UTC) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4DQfrx33xvz9sW8; Wed, 27 Jan 2021 21:26:09 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1611743176; bh=zryxgSLQjWiTOLD0UNSsw16+SrNjwYCl/LrpeqtsbiY=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=DyrsykGhL7Xp3tlspIoxzVoyNszca4ctJbln+LsxEzARiBiP2f7oa45V0QTswDfoc Cl5PRnAjD2cK63emo/Vlk7y7TVbZ96PKRzJR+YEOEso3cSKEJ6sMw1AVZ0TNPJtTiG efL77s8j0uGdHOawkZ51ugE8To6++G7bAG06R3VqR5izgvxz9DDbbPpVPIcMJ2Vqmx ICV6oIorPqbZ0+s8wzXSWX06bDGo2IRutQoRcfqUOhcWoi1WUlFKe97S3kG2l2OmVQ oS3xdg+yplepHRFmZPj2/TgwqxzIjNtApPn5VXrBZfprp5TDyBnCCucNMXptgoEmRO bdpnitg9VTrzQ== From: Michael Ellerman To: Nicholas Piggin , linux-mm@kvack.org, Andrew Morton Cc: Nicholas Piggin , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Jonathan Cameron , Christoph Hellwig , Christophe Leroy , Rick Edgecombe , Ding Tianhong Subject: Re: [PATCH v11 13/13] powerpc/64s/radix: Enable huge vmalloc mappings In-Reply-To: <20210126044510.2491820-14-npiggin@gmail.com> References: <20210126044510.2491820-1-npiggin@gmail.com> <20210126044510.2491820-14-npiggin@gmail.com> Date: Wed, 27 Jan 2021 21:26:08 +1100 Message-ID: <87mtwuptfj.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain 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: Nicholas Piggin writes: > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: Nicholas Piggin > --- Acked-by: Michael Ellerman cheers > .../admin-guide/kernel-parameters.txt | 2 ++ > arch/powerpc/Kconfig | 1 + > arch/powerpc/kernel/module.c | 21 +++++++++++++++---- > 3 files changed, 20 insertions(+), 4 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a10b545c2070..d62df53e5200 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -3225,6 +3225,8 @@ > > nohugeiomap [KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings. > > + nohugevmalloc [PPC] Disable kernel huge vmalloc mappings. > + > nosmt [KNL,S390] Disable symmetric multithreading (SMT). > Equivalent to smt=1. > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 107bb4319e0e..781da6829ab7 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -181,6 +181,7 @@ config PPC > select GENERIC_GETTIMEOFDAY > select HAVE_ARCH_AUDITSYSCALL > select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU > + select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 > select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14 > diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c > index a211b0253cdb..07026335d24d 100644 > --- a/arch/powerpc/kernel/module.c > +++ b/arch/powerpc/kernel/module.c > @@ -87,13 +87,26 @@ int module_finalize(const Elf_Ehdr *hdr, > return 0; > } > > -#ifdef MODULES_VADDR > void *module_alloc(unsigned long size) > { > + unsigned long start = VMALLOC_START; > + unsigned long end = VMALLOC_END; > + > +#ifdef MODULES_VADDR > BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); > + start = MODULES_VADDR; > + end = MODULES_END; > +#endif > + > + /* > + * Don't do huge page allocations for modules yet until more testing > + * is done. STRICT_MODULE_RWX may require extra work to support this > + * too. > + */ > > - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, GFP_KERNEL, > - PAGE_KERNEL_EXEC, VM_FLUSH_RESET_PERMS, NUMA_NO_NODE, > + return __vmalloc_node_range(size, 1, start, end, GFP_KERNEL, > + PAGE_KERNEL_EXEC, > + VM_NO_HUGE_VMAP | VM_FLUSH_RESET_PERMS, > + NUMA_NO_NODE, > __builtin_return_address(0)); > } > -#endif > -- > 2.23.0