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| author | Vasily Gorbik <gor@linux.ibm.com> | 2023-01-23 15:24:17 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-01-31 18:56:36 +0100 |
| commit | e966ccf836e8964edf984adc4b4af5f3a3e07de6 (patch) | |
| tree | 613f16e8b7a85f316477180a7303c0f96316bf5c /arch/s390/boot/boot.h | |
| parent | s390/syscalls: get rid of system call alias functions (diff) | |
| download | linux-e966ccf836e8964edf984adc4b4af5f3a3e07de6.tar.xz linux-e966ccf836e8964edf984adc4b4af5f3a3e07de6.zip | |
s390/boot: avoid mapping standby memory
Commit bb1520d581a3 ("s390/mm: start kernel with DAT enabled")
doesn't consider online memory holes due to potential memory offlining
and erroneously creates pgtables for stand-by memory, which bear RW+X
attribute and trigger a warning:
RANGE SIZE STATE REMOVABLE BLOCK
0x0000000000000000-0x0000000c3fffffff 49G online yes 0-48
0x0000000c40000000-0x0000000c7fffffff 1G offline 49
0x0000000c80000000-0x0000000fffffffff 14G online yes 50-63
0x0000001000000000-0x00000013ffffffff 16G offline 64-79
s390/mm: Found insecure W+X mapping at address 0xc40000000
WARNING: CPU: 14 PID: 1 at arch/s390/mm/dump_pagetables.c:142 note_page+0x2cc/0x2d8
Map only online memory ranges which fit within identity mapping limit.
Fixes: bb1520d581a3 ("s390/mm: start kernel with DAT enabled")
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot/boot.h')
| -rw-r--r-- | arch/s390/boot/boot.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h index 8abedae76e53..830cfabaa6a0 100644 --- a/arch/s390/boot/boot.h +++ b/arch/s390/boot/boot.h @@ -44,7 +44,7 @@ void print_missing_facilities(void); void sclp_early_setup_buffer(void); void print_pgm_check_info(void); unsigned long get_random_base(unsigned long safe_addr); -void setup_vmem(unsigned long online_end, unsigned long asce_limit); +void setup_vmem(unsigned long ident_map_size, unsigned long asce_limit); void __printf(1, 2) decompressor_printk(const char *fmt, ...); void error(char *m); |