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Message-ID: <20180115124016.17683-4-fanc.fnst@cn.fujitsu.com>
Date: Mon, 15 Jan 2018 20:40:14 +0800
From: Chao Fan <fanc.fnst@...fujitsu.com>
To: <linux-kernel@...r.kernel.org>, <x86@...nel.org>, <hpa@...or.com>,
<tglx@...utronix.de>, <mingo@...hat.com>, <bhe@...hat.com>,
<keescook@...omium.org>, <yasu.isimatu@...il.com>
CC: <indou.takao@...fujitsu.com>, <lcapitulino@...hat.com>,
Chao Fan <fanc.fnst@...fujitsu.com>
Subject: [PATCH v6 3/5] kaslr: disable memory mirror feature when movable_node
In kernel code, if movable_node specified, it will skip the mirror
feature. So we should also skip mirror feature in kaslr.
Signed-off-by: Chao Fan <fanc.fnst@...fujitsu.com>
---
arch/x86/boot/compressed/kaslr.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 38816d3f8865..5615f26364f9 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -646,6 +646,7 @@ static bool
process_efi_entries(unsigned long minimum, unsigned long image_size)
{
struct efi_info *e = &boot_params->efi_info;
+ char *args = (char *)get_cmd_line_ptr();
bool efi_mirror_found = false;
struct mem_vector region;
efi_memory_desc_t *md;
@@ -679,6 +680,12 @@ process_efi_entries(unsigned long minimum, unsigned long image_size)
}
}
+#ifdef CONFIG_MEMORY_HOTPLUG
+ /* Skip memory mirror if movabale_node or immovable_mem specified */
+ if (strstr(args, "movable_node"))
+ efi_mirror_found = false;
+#endif
+
for (i = 0; i < nr_desc; i++) {
md = efi_early_memdesc_ptr(pmap, e->efi_memdesc_size, i);
--
2.14.3
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