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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712851389; bh=SKr2KE9uheUItEEdb+3dSNIPv9WQiBLJhcJ7LNHhua4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h/PdoybvhERinJCMHC+yQRAsmlncc6oU4utcSyu6AELKgJzyJVfzHf76aaTeaChXL MpldlBly/9Jjz8av31uReShwgA9Wlq2qOfGfuBchPHxdljzoz5ojSKTJpFz36B8Zc1 2DsNtXjnq9CfKqqcXehaFdvhsqD42GyFk1ShEVXSbkFTR23dC8pO70bc8xYUW9wBzi rRIEIbV18psznTztZqe/QTtYLOFeXNHkH8OQND+pcN7VGhqgRVfK5LTckwJ9fwgq3g Q7po7BjAwo+Tu8x8tAJ4K4X4LQNucwifMC/HQQYPJ3qGF8eKjk76GPUw4vrFfWned9 MeSvQp+0Gx30w== 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 08/15] arm64: extend execmem_info for generated code allocations Date: Thu, 11 Apr 2024 19:00:44 +0300 Message-ID: <20240411160051.2093261-9-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: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 | 14 ++++++++++++++ arch/arm64/kernel/probes/kprobes.c | 7 ------- arch/arm64/net/bpf_jit_comp.c | 11 ----------- 3 files changed, 14 insertions(+), 18 deletions(-) diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c index a377a3217cf2..aa9e2b3d7459 100644 --- a/arch/arm64/kernel/module.c +++ b/arch/arm64/kernel/module.c @@ -115,6 +115,12 @@ static struct execmem_info execmem_info __ro_after_init = { [EXECMEM_DEFAULT] = { .alignment = MODULE_ALIGN, }, + [EXECMEM_KPROBES] = { + .alignment = 1, + }, + [EXECMEM_BPF] = { + .alignment = 1, + }, }, }; @@ -143,6 +149,14 @@ struct execmem_info __init *execmem_arch_setup(void) r->end = module_plt_base + SZ_2G; } + execmem_info.ranges[EXECMEM_KPROBES].pgprot = PAGE_KERNEL_ROX; + execmem_info.ranges[EXECMEM_KPROBES].start = VMALLOC_START; + execmem_info.ranges[EXECMEM_KPROBES].end = VMALLOC_END; + + execmem_info.ranges[EXECMEM_BPF].pgprot = PAGE_KERNEL; + execmem_info.ranges[EXECMEM_BPF].start = VMALLOC_START; + execmem_info.ranges[EXECMEM_BPF].end = VMALLOC_END; + return &execmem_info; } 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) {