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powerpc/32: Stop printing Kernel virtual memory layout

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Printing of Kernel virtual memory layout was added for debug purpose
by commit f637a49e50 ("powerpc: Minor cleanups of kernel virt
address space definitions")

For security reasons, don't display the kernel's virtual memory layout.

Other architectures have removed it through following commits.

Commit 071929dbdd ("arm64: Stop printing the virtual memory layout")
Commit 1c31d4e96b ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
Commit 31833332f7 ("m68k/mm: Stop printing the virtual memory layout")
Commit fd8d0ca256 ("parisc: Hide virtual kernel memory layout")
Commit 681ff0181b ("x86/mm/init/32: Stop printing the virtual memory layout")

Commit 681ff0181b ("x86/mm/init/32: Stop printing the virtual memory
layout") thought x86 was the last one, but in reality powerpc/32 still
had it.

So remove it now on powerpc/32 as well.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Kees Cook <kees@kernel.org>
[Maddy: Added "Commit" in commit message to avoid checkpatch error]
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/430bc8c1f2ff2eb9224b04450e22db472b0b9fa9.1736361630.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2025-01-08 19:40:38 +01:00
committed by Madhavan Srinivasan
parent 2c1cbbab62
commit 2bf3caa7cc
1 changed files with 0 additions and 22 deletions
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22
arch/powerpc/mm/mem.c
View File

@@ -319,28 +319,6 @@ void __init mem_init(void)
per_cpu(next_tlbcam_idx, smp_processor_id()) =
(mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
#endif
#ifdef CONFIG_PPC32
pr_info("Kernel virtual memory layout:\n");
#ifdef CONFIG_KASAN
pr_info(" * 0x%08lx..0x%08lx : kasan shadow mem\n",
KASAN_SHADOW_START, KASAN_SHADOW_END);
#endif
pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP);
#ifdef CONFIG_HIGHMEM
pr_info(" * 0x%08lx..0x%08lx : highmem PTEs\n",
PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP));
#endif /* CONFIG_HIGHMEM */
if (ioremap_bot != IOREMAP_TOP)
pr_info(" * 0x%08lx..0x%08lx : early ioremap\n",
ioremap_bot, IOREMAP_TOP);
pr_info(" * 0x%08lx..0x%08lx : vmalloc & ioremap\n",
VMALLOC_START, VMALLOC_END);
#ifdef MODULES_VADDR
pr_info(" * 0x%08lx..0x%08lx : modules\n",
MODULES_VADDR, MODULES_END);
#endif
#endif /* CONFIG_PPC32 */
}
void free_initmem(void)