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Message-ID: <20240422084717.3602332-9-rppt@kernel.org>
Date: Mon, 22 Apr 2024 11:47:17 +0300
From: Mike Rapoport <rppt@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Alexandre Ghiti <alexghiti@...osinc.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Björn Töpel <bjorn@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
"David S. Miller" <davem@...emloft.net>,
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Donald Dutile <ddutile@...hat.com>,
Eric Chanudet <echanude@...hat.com>,
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Mark Rutland <mark.rutland@....com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Mike Rapoport <rppt@...nel.org>,
Nadav Amit <nadav.amit@...il.com>,
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Peter Zijlstra <peterz@...radead.org>,
Rick Edgecombe <rick.p.edgecombe@...el.com>,
Russell King <linux@...linux.org.uk>,
Sam Ravnborg <sam@...nborg.org>,
Song Liu <song@...nel.org>,
Steven Rostedt <rostedt@...dmis.org>,
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Subject: [PATCH v5 09/15] riscv: extend execmem_params for generated code allocations
From: "Mike Rapoport (IBM)" <rppt@...nel.org>
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) <rppt@...nel.org>
Reviewed-by: Alexandre Ghiti <alexghiti@...osinc.com>
---
arch/riscv/kernel/module.c | 28 +++++++++++++++++++++++++---
arch/riscv/kernel/probes/kprobes.c | 10 ----------
arch/riscv/net/bpf_jit_core.c | 13 -------------
3 files changed, 25 insertions(+), 26 deletions(-)
diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c
index 182904127ba0..2ecbacbc9993 100644
--- a/arch/riscv/kernel/module.c
+++ b/arch/riscv/kernel/module.c
@@ -906,19 +906,41 @@ 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;
struct execmem_info __init *execmem_arch_setup(void)
{
+ unsigned long start, end;
+
+ if (IS_ENABLED(CONFIG_64BIT)) {
+ start = MODULES_VADDR;
+ end = MODULES_END;
+ } else {
+ start = VMALLOC_START;
+ end = VMALLOC_END;
+ }
+
execmem_info = (struct execmem_info){
.ranges = {
[EXECMEM_DEFAULT] = {
- .start = MODULES_VADDR,
- .end = MODULES_END,
+ .start = start,
+ .end = end,
.pgprot = PAGE_KERNEL,
.alignment = 1,
},
+ [EXECMEM_KPROBES] = {
+ .start = VMALLOC_START,
+ .end = VMALLOC_END,
+ .pgprot = PAGE_KERNEL_READ_EXEC,
+ .alignment = 1,
+ },
+ [EXECMEM_BPF] = {
+ .start = BPF_JIT_REGION_START,
+ .end = BPF_JIT_REGION_END,
+ .pgprot = PAGE_KERNEL,
+ .alignment = PAGE_SIZE,
+ },
},
};
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;
--
2.43.0
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