From patchwork Fri Apr 26 08:28:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13644261 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 207FC13D299; Fri, 26 Apr 2024 08:31:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714120266; cv=none; b=jeSpGjel2iz1Du7W4d/nmRPNUKdwf1lzJvU3P7WZGlioItWlyWvQRo+Sm2w/Jkxv3sC1VZFkbEfXkLMwJ3dgtxPc3KqO4F+VygqXZ2eipI4OHHvYdyNrHT6uU7cDIHkMYhuCMUWqY339uY2KgREZjK9jX6ZTYunUeMk0OMLJ2QI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714120266; c=relaxed/simple; bh=baelIo5gqQ6dNoONu464d37hHX6/MoaALRFlqjsyJfc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Yo0MaVvOTZTOtSLd1Lw830V2R53b+i7RDKfEoKklHzDQM+6Ds2mqq7X5uxb+jE0xxIB3lB6atAfZgimYcFgn0mBY9DuuTBq2p0JXUpgk7pwl5/bP5kYC/9iOszfe0jKKO6R2Uq8zYnOSi9U1x+YyExI7PoYcWDbzVqmVZh5jCws= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PKONgJ1Q; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PKONgJ1Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27323C113CE; Fri, 26 Apr 2024 08:30:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714120265; bh=baelIo5gqQ6dNoONu464d37hHX6/MoaALRFlqjsyJfc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PKONgJ1Qdz8UWrqYN1ZX4SC/mWC6ejttaPgK34VndT+EqYH8tNZm9N5sHEIPTWNOL PeS7hUpNc3Hcxg4NFbS7e4iqg4SMFyWYqPXU297rBbMaGlPxOzaXn7G14FAQ8O1WlM FN4VoFISbQVjVGaP9hjcr2wIWVh0zoP+TSjwYlSYlvNBYFFj7HtF94z6YyELAoklq/ w/p6xes60DM4Iwm2cN4rVzoZveadaxZkTJouD0y4ZNlZXalnXiHtgBflYuf2e3NHKt ppr0urZYCzFq9rcQuln0hib9PLAzoiNM/04RP0lCGJQm0TeX1iTFt1PW6mRy4eG71Q IlXwRUKHBRVmw== From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Alexandre Ghiti , Andrew Morton , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Donald Dutile , Eric Chanudet , Heiko Carstens , Helge Deller , Huacai Chen , Kent Overstreet , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Michael Ellerman , Mike Rapoport , Nadav Amit , Palmer Dabbelt , Peter Zijlstra , Rick Edgecombe , Russell King , Sam Ravnborg , Song Liu , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Will Deacon , bpf@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v6 10/16] arm64: extend execmem_info for generated code allocations Date: Fri, 26 Apr 2024 11:28:48 +0300 Message-ID: <20240426082854.7355-11-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240426082854.7355-1-rppt@kernel.org> References: <20240426082854.7355-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net From: "Mike Rapoport (IBM)" The memory allocations for kprobes and BPF on arm64 can be placed anywhere in vmalloc address space and currently this is implemented with overrides of alloc_insn_page() and bpf_jit_alloc_exec() in arm64. Define EXECMEM_KPROBES and EXECMEM_BPF ranges in arm64::execmem_info and drop overrides of alloc_insn_page() and bpf_jit_alloc_exec(). Signed-off-by: Mike Rapoport (IBM) Acked-by: Will Deacon --- arch/arm64/kernel/module.c | 12 ++++++++++++ arch/arm64/kernel/probes/kprobes.c | 7 ------- arch/arm64/net/bpf_jit_comp.c | 11 ----------- 3 files changed, 12 insertions(+), 18 deletions(-) diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c index b7a7a23f9f8f..a52240ea084b 100644 --- a/arch/arm64/kernel/module.c +++ b/arch/arm64/kernel/module.c @@ -146,6 +146,18 @@ struct execmem_info __init *execmem_arch_setup(void) .fallback_start = fallback_start, .fallback_end = fallback_end, }, + [EXECMEM_KPROBES] = { + .start = VMALLOC_START, + .end = VMALLOC_END, + .pgprot = PAGE_KERNEL_ROX, + .alignment = 1, + }, + [EXECMEM_BPF] = { + .start = VMALLOC_START, + .end = VMALLOC_END, + .pgprot = PAGE_KERNEL, + .alignment = 1, + }, }, }; diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index 327855a11df2..4268678d0e86 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -129,13 +129,6 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) return 0; } -void *alloc_insn_page(void) -{ - return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END, - GFP_KERNEL, PAGE_KERNEL_ROX, VM_FLUSH_RESET_PERMS, - NUMA_NO_NODE, __builtin_return_address(0)); -} - /* arm kprobe: install breakpoint in text */ void __kprobes arch_arm_kprobe(struct kprobe *p) { diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 122021f9bdfc..456f5af239fc 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -1793,17 +1793,6 @@ u64 bpf_jit_alloc_exec_limit(void) return VMALLOC_END - VMALLOC_START; } -void *bpf_jit_alloc_exec(unsigned long size) -{ - /* Memory is intended to be executable, reset the pointer tag. */ - return kasan_reset_tag(vmalloc(size)); -} - -void bpf_jit_free_exec(void *addr) -{ - return vfree(addr); -} - /* Indicate the JIT backend supports mixing bpf2bpf and tailcalls. */ bool bpf_jit_supports_subprog_tailcalls(void) {