linux-kernel - [PATCH] powerpc/32: Display modules range in virtual memory layout

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Message-Id: <98394503e92d6fd6d8f657e0b263b32f21cf2790.1623438478.git.christophe.leroy@csgroup.eu>
Date:   Fri, 11 Jun 2021 19:08:54 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/32: Display modules range in virtual memory layout

book3s/32 and 8xx don't use vmalloc for modules.

Print the modules area at startup as part of the virtual memory layout:

[    0.000000] Kernel virtual memory layout:
[    0.000000]   * 0xffafc000..0xffffc000  : fixmap
[    0.000000]   * 0xc9000000..0xffafc000  : vmalloc & ioremap
[    0.000000]   * 0xb0000000..0xc0000000  : modules
[    0.000000] Memory: 118480K/131072K available (7152K kernel code, 2320K rwdata, 1328K rodata, 368K init, 854K bss, 12592K reserved, 0K cma-reserved)

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/mm/mem.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 77fce7aa7dc5..c3b4fdda7069 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -302,6 +302,10 @@ void __init mem_init(void)
 			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 */
 }
 
-- 
2.25.0