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>,
"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 v6 03/16] nios2: define virtual address space for modules
Date: Fri, 26 Apr 2024 11:28:41 +0300 [thread overview]
Message-ID: <20240426082854.7355-4-rppt@kernel.org> (raw)
In-Reply-To: <20240426082854.7355-1-rppt@kernel.org>
From: "Mike Rapoport (IBM)" <rppt@kernel.org>
nios2 uses kmalloc() to implement module_alloc() because CALL26/PCREL26
cannot reach all of vmalloc address space.
Define module space as 32MiB below the kernel base and switch nios2 to
use vmalloc for module allocations.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
---
arch/nios2/include/asm/pgtable.h | 5 ++++-
arch/nios2/kernel/module.c | 19 ++++---------------
2 files changed, 8 insertions(+), 16 deletions(-)
diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h
index d052dfcbe8d3..eab87c6beacb 100644
--- a/arch/nios2/include/asm/pgtable.h
+++ b/arch/nios2/include/asm/pgtable.h
@@ -25,7 +25,10 @@
#include <asm-generic/pgtable-nopmd.h>
#define VMALLOC_START CONFIG_NIOS2_KERNEL_MMU_REGION_BASE
-#define VMALLOC_END (CONFIG_NIOS2_KERNEL_REGION_BASE - 1)
+#define VMALLOC_END (CONFIG_NIOS2_KERNEL_REGION_BASE - SZ_32M - 1)
+
+#define MODULES_VADDR (CONFIG_NIOS2_KERNEL_REGION_BASE - SZ_32M)
+#define MODULES_END (CONFIG_NIOS2_KERNEL_REGION_BASE - 1)
struct mm_struct;
diff --git a/arch/nios2/kernel/module.c b/arch/nios2/kernel/module.c
index 76e0a42d6e36..9c97b7513853 100644
--- a/arch/nios2/kernel/module.c
+++ b/arch/nios2/kernel/module.c
@@ -21,23 +21,12 @@
#include <asm/cacheflush.h>
-/*
- * Modules should NOT be allocated with kmalloc for (obvious) reasons.
- * But we do it for now to avoid relocation issues. CALL26/PCREL26 cannot reach
- * from 0x80000000 (vmalloc area) to 0xc00000000 (kernel) (kmalloc returns
- * addresses in 0xc0000000)
- */
void *module_alloc(unsigned long size)
{
- if (size == 0)
- return NULL;
- return kmalloc(size, GFP_KERNEL);
-}
-
-/* Free memory returned from module_alloc */
-void module_memfree(void *module_region)
-{
- kfree(module_region);
+ return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
+ GFP_KERNEL, PAGE_KERNEL_EXEC,
+ VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
--
2.43.0
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next prev parent reply other threads:[~2024-04-26 8:30 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-26 8:28 [PATCH v6 00/16] mm: jit/text allocator Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 01/16] arm64: module: remove unneeded call to kasan_alloc_module_shadow() Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 02/16] mips: module: rename MODULE_START to MODULES_VADDR Mike Rapoport
2024-04-26 8:28 ` Mike Rapoport [this message]
2024-04-26 8:28 ` [PATCH v6 04/16] sparc: simplify module_alloc() Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 05/16] module: make module_memory_{alloc,free} more self-contained Mike Rapoport
2024-04-26 18:48 ` Song Liu
2024-04-26 8:28 ` [PATCH v6 06/16] mm: introduce execmem_alloc() and execmem_free() Mike Rapoport
2024-04-26 18:50 ` Song Liu
2024-04-26 8:28 ` [PATCH v6 07/16] mm/execmem, arch: convert simple overrides of module_alloc to execmem Mike Rapoport
2024-04-26 18:54 ` Song Liu
2024-04-26 8:28 ` [PATCH v6 08/16] mm/execmem, arch: convert remaining " Mike Rapoport
2024-04-26 19:01 ` Song Liu
2024-04-28 6:55 ` Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 09/16] riscv: extend execmem_params for generated code allocations Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 10/16] arm64: extend execmem_info " Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 11/16] powerpc: extend execmem_params for kprobes allocations Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 12/16] arch: make execmem setup available regardless of CONFIG_MODULES Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 13/16] x86/ftrace: enable dynamic ftrace without CONFIG_MODULES Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 14/16] powerpc: use CONFIG_EXECMEM instead of CONFIG_MODULES where appropriate Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 15/16] kprobes: remove dependency on CONFIG_MODULES Mike Rapoport
2024-04-26 8:28 ` [PATCH v6 16/16] bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of Mike Rapoport
2024-04-26 22:16 ` [PATCH v6 00/16] mm: jit/text allocator Luis Chamberlain
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