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powerpc/32s: Reduce default size of module/execmem area

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book3s/32 platforms have usually more memory than 8xx, but it is still
not worth reserving a full segment (256 Mbytes) for module text.
64Mbytes should be far enough.

Also fix TASK_SIZE when EXECMEM is not selected, and add a build
verification for overlap of module execmem space with user segments.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c1f6a4e47f177d919561c6e97d31af5564923cf6.1724173828.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2024-08-20 19:23:54 +02:00
committed by Michael Ellerman
parent ac9f97ff8b
commit 2f2b9a3adc
3 changed files with 8 additions and 4 deletions
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3
arch/powerpc/include/asm/book3s/32/pgtable.h
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@@ -196,7 +196,8 @@ void unmap_kernel_page(unsigned long va);
#endif
#define MODULES_END ALIGN_DOWN(PAGE_OFFSET, SZ_256M)
#define MODULES_VADDR (MODULES_END - SZ_256M)
#define MODULES_SIZE (CONFIG_MODULES_SIZE * SZ_1M)
#define MODULES_VADDR (MODULES_END - MODULES_SIZE)
#ifndef __ASSEMBLY__
#include <linux/sched.h>