From: Mike Rapoport <rppt@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: "Alexandre Ghiti" <alexghiti@rivosinc.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Björn Töpel" <bjorn@kernel.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Christophe Leroy" <christophe.leroy@csgroup.eu>,
"David S. Miller" <davem@davemloft.net>,
"Dinh Nguyen" <dinguyen@kernel.org>,
"Donald Dutile" <ddutile@redhat.com>,
"Eric Chanudet" <echanude@redhat.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Helge Deller" <deller@gmx.de>,
"Huacai Chen" <chenhuacai@kernel.org>,
"Kent Overstreet" <kent.overstreet@linux.dev>,
"Luis Chamberlain" <mcgrof@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Mike Rapoport" <rppt@kernel.org>,
"Nadav Amit" <nadav.amit@gmail.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Rick Edgecombe" <rick.p.edgecombe@intel.com>,
"Russell King" <linux@armlinux.org.uk>,
"Sam Ravnborg" <sam@ravnborg.org>, "Song Liu" <song@kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will@kernel.org>,
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 v7 10/16] arm64: extend execmem_info for generated code allocations
Date: Mon, 29 Apr 2024 15:16:14 +0300 [thread overview]
Message-ID: <20240429121620.1186447-11-rppt@kernel.org> (raw)
In-Reply-To: <20240429121620.1186447-1-rppt@kernel.org>
From: "Mike Rapoport (IBM)" <rppt@kernel.org>
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) <rppt@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
---
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)
{
--
2.43.0
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next prev parent reply other threads:[~2024-04-29 13:30 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 12:16 [PATCH v7 00/16] mm: jit/text allocator Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 01/16] arm64: module: remove unneeded call to kasan_alloc_module_shadow() Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 02/16] mips: module: rename MODULE_START to MODULES_VADDR Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 03/16] nios2: define virtual address space for modules Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 04/16] sparc: simplify module_alloc() Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 05/16] module: make module_memory_{alloc,free} more self-contained Mike Rapoport
2024-04-30 12:41 ` Philippe Mathieu-Daudé
2024-04-29 12:16 ` [PATCH v7 06/16] mm: introduce execmem_alloc() and execmem_free() Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 07/16] mm/execmem, arch: convert simple overrides of module_alloc to execmem Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 08/16] mm/execmem, arch: convert remaining " Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 09/16] riscv: extend execmem_params for generated code allocations Mike Rapoport
2024-04-29 12:16 ` Mike Rapoport [this message]
2024-04-29 12:16 ` [PATCH v7 11/16] powerpc: extend execmem_params for kprobes allocations Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 12/16] arch: make execmem setup available regardless of CONFIG_MODULES Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 13/16] x86/ftrace: enable dynamic ftrace without CONFIG_MODULES Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 14/16] powerpc: use CONFIG_EXECMEM instead of CONFIG_MODULES where appropriate Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 15/16] kprobes: remove dependency on CONFIG_MODULES Mike Rapoport
2024-04-29 12:16 ` [PATCH v7 16/16] bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of Mike Rapoport
2024-04-29 16:29 ` [PATCH v7 00/16] mm: jit/text allocator Luis Chamberlain
2024-05-02 22:50 ` Liviu Dudau
2024-05-02 23:07 ` Luis Chamberlain
2024-05-03 0:23 ` Liviu Dudau
2024-05-03 6:28 ` Mike Rapoport
2024-05-03 10:40 ` Liviu Dudau
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