From patchwork Thu Apr 11 16:00:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13626187 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 9685F13329C; Thu, 11 Apr 2024 16:03:19 +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=1712851399; cv=none; b=pajju4r+52geYmIGH4n7U8TqevmbyZ3Dj/gZaET+eny9uKBLIFz5yK3UErx3bTgjGcbjPV+AB6nZHJuJ+jaqtJaVPlG19ZfdWbzRuAhke+k3IBs/M4ffnnlrktxjXU2AhJGL40sCz/R0bYlgUKqb8v2UB/LlKQy0x4nk8yAtCqo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712851399; c=relaxed/simple; bh=MDN1WZXA3xhpqzlVolNbN2nPNGabqu/EHQ96vnrSojU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JaQtBB3bAIncCS7EIcIPvTca4gC8MJRCi3cRfHk9TjywHqLRpLJTpA1U78N43aop++x7kkRwgomHpfun3gcxgZX61neWnaTG0SvHuq3nml8QaFoHdq+6f8JvCvx5JUaGs5Zq36mSlJmJfU8wViEnn0cz6Ntk7IB74k9sW2QACkc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LhJUoNdh; 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="LhJUoNdh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 94880C2BD11; Thu, 11 Apr 2024 16:03:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712851399; bh=MDN1WZXA3xhpqzlVolNbN2nPNGabqu/EHQ96vnrSojU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LhJUoNdhtV0oZXoRrDXU6eMRqs3zZ5XHBNvrq+6ByzAMbDAa6uq7MBqyMKgbGqZFW HrzUCiC8TYoTAiZJ4eUrIKHEBCy1h9cvybi1lknpDvZxBUbpLxDlWVac4fFQo8y3tl 6XYZrA/ZIeDOZnAcush9O5J+oz/E9mCdnu9FG5iSvvfxcbchbVMnbZJ0Ot60g9khR8 6hlVhoKuSdfItxauM9IOtBNhB/qhuG+DV//AyfCzDUlFwdosD585kNGC5cwqVdOxlh 8Zby1LP7fTPzIayJ9Zh0PVhOV8QUnueDvX81krMeKPRGIRxcKLNazZfZgzVpP34N6W ovAGcgA2RpWQg== 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 , Michael Ellerman , Mike Rapoport , Nadav Amit , Palmer Dabbelt , Puranjay Mohan , Rick Edgecombe , Russell King , 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 v4 09/15] riscv: extend execmem_params for generated code allocations Date: Thu, 11 Apr 2024 19:00:45 +0300 Message-ID: <20240411160051.2093261-10-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240411160051.2093261-1-rppt@kernel.org> References: <20240411160051.2093261-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: bpf@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 RISC-V are not placed in the modules area and these custom allocations are implemented with overrides of alloc_insn_page() and bpf_jit_alloc_exec(). Slightly reorder execmem_params initialization to support both 32 and 64 bit variants, define EXECMEM_KPROBES and EXECMEM_BPF ranges in riscv::execmem_params and drop overrides of alloc_insn_page() and bpf_jit_alloc_exec(). Signed-off-by: Mike Rapoport (IBM) Reviewed-by: Alexandre Ghiti --- arch/riscv/kernel/module.c | 21 ++++++++++++++++++++- arch/riscv/kernel/probes/kprobes.c | 10 ---------- arch/riscv/net/bpf_jit_core.c | 13 ------------- 3 files changed, 20 insertions(+), 24 deletions(-) diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c index ad32e2a8621a..aad158bb2022 100644 --- a/arch/riscv/kernel/module.c +++ b/arch/riscv/kernel/module.c @@ -906,20 +906,39 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, return 0; } -#if defined(CONFIG_MMU) && defined(CONFIG_64BIT) +#ifdef CONFIG_MMU static struct execmem_info execmem_info __ro_after_init = { .ranges = { [EXECMEM_DEFAULT] = { .pgprot = PAGE_KERNEL, .alignment = 1, }, + [EXECMEM_KPROBES] = { + .pgprot = PAGE_KERNEL_READ_EXEC, + .alignment = 1, + }, + [EXECMEM_BPF] = { + .pgprot = PAGE_KERNEL, + .alignment = PAGE_SIZE, + }, }, }; struct execmem_info __init *execmem_arch_setup(void) { +#ifdef CONFIG_64BIT execmem_info.ranges[EXECMEM_DEFAULT].start = MODULES_VADDR; execmem_info.ranges[EXECMEM_DEFAULT].end = MODULES_END; +#else + execmem_info.ranges[EXECMEM_DEFAULT].start = VMALLOC_START; + execmem_info.ranges[EXECMEM_DEFAULT].end = VMALLOC_END; +#endif + + execmem_info.ranges[EXECMEM_KPROBES].start = VMALLOC_START; + execmem_info.ranges[EXECMEM_KPROBES].end = VMALLOC_END; + + execmem_info.ranges[EXECMEM_BPF].start = BPF_JIT_REGION_START; + execmem_info.ranges[EXECMEM_BPF].end = BPF_JIT_REGION_END; return &execmem_info; } diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c index 2f08c14a933d..e64f2f3064eb 100644 --- a/arch/riscv/kernel/probes/kprobes.c +++ b/arch/riscv/kernel/probes/kprobes.c @@ -104,16 +104,6 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) return 0; } -#ifdef CONFIG_MMU -void *alloc_insn_page(void) -{ - return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END, - GFP_KERNEL, PAGE_KERNEL_READ_EXEC, - VM_FLUSH_RESET_PERMS, NUMA_NO_NODE, - __builtin_return_address(0)); -} -#endif - /* install breakpoint in text */ void __kprobes arch_arm_kprobe(struct kprobe *p) { diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c index 6b3acac30c06..e238fdbd5dbc 100644 --- a/arch/riscv/net/bpf_jit_core.c +++ b/arch/riscv/net/bpf_jit_core.c @@ -219,19 +219,6 @@ u64 bpf_jit_alloc_exec_limit(void) return BPF_JIT_REGION_SIZE; } -void *bpf_jit_alloc_exec(unsigned long size) -{ - return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START, - BPF_JIT_REGION_END, GFP_KERNEL, - PAGE_KERNEL, 0, NUMA_NO_NODE, - __builtin_return_address(0)); -} - -void bpf_jit_free_exec(void *addr) -{ - return vfree(addr); -} - void *bpf_arch_text_copy(void *dst, void *src, size_t len) { int ret;