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parisc: Check if initrd was loaded into broken RAM

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While scanning the PDT for reported broken memory modules, warn if the
initrd was coincidentally loaded into bad memory.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2017-09-18 17:55:24 +02:00
parent 8d771b143f
commit ea6976483f
1 changed files with 9 additions and 0 deletions
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9
arch/parisc/kernel/pdt.c
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@ -15,6 +15,7 @@
#include <linux/memblock.h> #include <linux/memblock.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/initrd.h>
#include <asm/pdc.h> #include <asm/pdc.h>
#include <asm/pdcpat.h> #include <asm/pdcpat.h>
@ -216,8 +217,16 @@ void __init pdc_pdt_init(void)
} }
for (i = 0; i < pdt_status.pdt_entries; i++) { for (i = 0; i < pdt_status.pdt_entries; i++) {
unsigned long addr;
report_mem_err(pdt_entry[i]); report_mem_err(pdt_entry[i]);
addr = pdt_entry[i] & PDT_ADDR_PHYS_MASK;
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) &&
addr >= initrd_start && addr < initrd_end)
pr_crit("CRITICAL: initrd possibly broken "
"due to bad memory!\n");
/* mark memory page bad */ /* mark memory page bad */
memblock_reserve(pdt_entry[i] & PAGE_MASK, PAGE_SIZE); memblock_reserve(pdt_entry[i] & PAGE_MASK, PAGE_SIZE);
} }