The default value of CORES_TS_OFFSET will cause the following known issue:
# cat /sys/kernel/debug/llce_core/core1_ts
Unable to handle kernel paging request at virtual address ffffffc00ced0870
Mem abort info:
ESR = 0x0000000096000007
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x07: level 3 translation fault
Data abort info:
ISV = 0, ISS = 0x00000007
CM = 0, WnR = 0
swapper pgtable: 4k pages, 39-bit VAs, pgdp=000000008b84f000
[ffffffc00ced0870] pgd=10000008dffff003, p4d=10000008dffff003,
pud=10000008dffff003, pmd=1000000889aeb003, pte=0000000000000000
Internal error: Oops: 96000007 1 PREEMPT SMP
Modules linked in: 8021q llce_mailbox llce_core llce_can pfeng(O) sch_fq_codel
openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
[last unloaded: llce_core]
CPU: 1 PID: 781 Comm: cat Tainted: G O 5.15.135-yocto-standard #1
Hardware name: NXP S32G399A-RDB3 (DT)
pstate: 60000005 (nZCv daif PAN -UAO -TCO -DIT -SSBS BTYPE=-)
pc : debugfs_readl_get+0xc/0x30 [llce_core]
lr : simple_attr_read+0x7c/0x130
sp : ffffffc00d23bcd0
x29: ffffffc00d23bce0 x28: ffffff88142e0040 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000007fb45bf000
x23: 0000000000020000 x22: ffffff8820da7150 x21: 0000000000000000
x20: ffffffc00d23bda0 x19: ffffff8820da7100 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 0101010101010101 x9 : ffffffc00836968c
x8 : ffffffc009fb6c18 x7 : 0000000000000000 x6 : 0000000000000001
x5 : ffffffc009d31000 x4 : ffffffc009d31808 x3 : 0000000000000000
x2 : ffffffc001170000 x1 : ffffffc00d23bcd0 x0 : ffffffc00ced0870
Call trace:
debugfs_readl_get+0xc/0x30 [llce_core]
debugfs_attr_read+0x54/0x9c
vfs_read+0xb4/0x1ec
ksys_read+0x74/0x104
__arm64_sys_read+0x24/0x30
invoke_syscall+0x5c/0x130
el0_svc_common.constprop.0+0x68/0x124
do_el0_svc+0x4c/0xb0
el0_svc+0x54/0x110
el0t_64_sync_handler+0xa4/0x130
el0t_64_sync+0x1a0/0x1a4
Code: bad PC value
--[ end trace feb346f6b33a6527 ]--
Kernel panic - not syncing: Oops: Fatal exception
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x8,00002001,20000842
Memory Limit: none
--[ end Kernel panic - not syncing: Oops: Fatal exception ]--
This patch changing the CORES_TS_OFFSET to 0x13730, which is from the
"Release Note" of BSP38 and given as a workaround, will fix the above issue.
The value of CORES_TS_OFFSET may be changed in future BSP versions, and we
will update it accordingly.
Signed-off-by: Zhantao Tang <zhantao.t...@windriver.com>
---
drivers/mfd/llce-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/llce-core.c b/drivers/mfd/llce-core.c
index 212bf99283dc1..e7a798324f9f8 100644
--- a/drivers/mfd/llce-core.c
+++ b/drivers/mfd/llce-core.c
@@ -36,7 +36,7 @@
#define LLCE_MGR_TX_BOOT_END (0x00000F00U)
#define LLCE_MGR_FRPE_BOOT_END (0x0000F000U)
#define LLCE_MGR_BOOT_END_ALL_CORES_MASK (0x0000FFFFU)
-#define CORES_TS_OFFSET (0x13FD0)
+#define CORES_TS_OFFSET (0x13730)
struct sram_node {
const char *name;
--
2.25.1
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