[PATCH 3/3] powerpc/32s: Define a MODULE area below kernel text all the time
From: Christophe Leroy <hidden>
Date: 2021-04-01 21:20:30
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
On book3s/32, the segment below kernel text is used for module allocation when CONFIG_STRICT_KERNEL_RWX is defined. In order to benefit from the powerpc specific module_alloc() function which allocate modules with 32 Mbytes from end of kernel text, use that segment below PAGE_OFFSET at all time. Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/book3s/32/pgtable.h | 2 -- arch/powerpc/mm/book3s32/mmu.c | 7 ------- 3 files changed, 1 insertion(+), 10 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c1344c05226c..15a91202d5c3 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -1219,7 +1219,7 @@ config TASK_SIZE_BOOL config TASK_SIZE hex "Size of user task space" if TASK_SIZE_BOOL default "0x80000000" if PPC_8xx - default "0xb0000000" if PPC_BOOK3S_32 && STRICT_KERNEL_RWX + default "0xb0000000" if PPC_BOOK3S_32 default "0xc0000000" endmenu
diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 415ae29fa73a..83c65845a1a9 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h@@ -194,10 +194,8 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot); #define VMALLOC_END ioremap_bot #endif -#ifdef CONFIG_STRICT_KERNEL_RWX #define MODULES_END ALIGN_DOWN(PAGE_OFFSET, SZ_256M) #define MODULES_VADDR (MODULES_END - SZ_256M) -#endif #ifndef __ASSEMBLY__ #include <linux/sched.h>
diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index a0db398b5c26..159930351d9f 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c@@ -184,17 +184,10 @@ static bool is_module_segment(unsigned long addr) { if (!IS_ENABLED(CONFIG_MODULES)) return false; -#ifdef MODULES_VADDR if (addr < ALIGN_DOWN(MODULES_VADDR, SZ_256M)) return false; if (addr > ALIGN(MODULES_END, SZ_256M) - 1) return false; -#else - if (addr < ALIGN_DOWN(VMALLOC_START, SZ_256M)) - return false; - if (addr > ALIGN(VMALLOC_END, SZ_256M) - 1) - return false; -#endif return true; }
--
2.25.0