From 31e9ccc67ce24f82120e41fcafd841f98838ff5c Mon Sep 17 00:00:00 2001 From: Mikhail Zaslonko Date: Thu, 30 Mar 2023 09:18:01 +0200 Subject: s390/ipl: add REIPL_CLEAR flag to os_info Introduce new OS_INFO_FLAGS_ENTRY to os_info pointing to the field with bit flags. Add OS_INFO_FLAGS_ENTRY upon dump_reipl shutdown action processing and set OS_INFO_FLAG_REIPL_CLEAR flag indicating 'clear' sysfs attribute has been set on the panicked system for specified ipl type. This flag can be used to inform the dumper whether LOAD_CLEAR or LOAD_NORMAL diag308 subcode to be used for ipl after dumping the memory. Signed-off-by: Mikhail Zaslonko Acked-by: Alexander Gordeev Reviewed-by: Heiko Carstens Signed-off-by: Alexander Gordeev --- arch/s390/include/asm/os_info.h | 7 +++++-- arch/s390/kernel/ipl.c | 16 ++++++++++++++++ 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/os_info.h b/arch/s390/include/asm/os_info.h index 0d1c74a7a650..a4d2e103f116 100644 --- a/arch/s390/include/asm/os_info.h +++ b/arch/s390/include/asm/os_info.h @@ -16,6 +16,9 @@ #define OS_INFO_VMCOREINFO 0 #define OS_INFO_REIPL_BLOCK 1 +#define OS_INFO_FLAGS_ENTRY 2 + +#define OS_INFO_FLAG_REIPL_CLEAR (1UL << 0) struct os_info_entry { u64 addr; @@ -30,8 +33,8 @@ struct os_info { u16 version_minor; u64 crashkernel_addr; u64 crashkernel_size; - struct os_info_entry entry[2]; - u8 reserved[4024]; + struct os_info_entry entry[3]; + u8 reserved[4004]; } __packed; void os_info_init(void); diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 43de939b7af1..d57b02fdd329 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -176,6 +176,8 @@ static bool reipl_fcp_clear; static bool reipl_ccw_clear; static bool reipl_eckd_clear; +static unsigned long os_info_flags; + static inline int __diag308(unsigned long subcode, unsigned long addr) { union register_pair r1; @@ -1939,6 +1941,20 @@ static void dump_reipl_run(struct shutdown_trigger *trigger) struct lowcore *abs_lc; unsigned int csum; + /* + * Set REIPL_CLEAR flag in os_info flags entry indicating + * 'clear' sysfs attribute has been set on the panicked system + * for specified reipl type. + * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN. + */ + if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) || + (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) || + (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) || + (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) || + reipl_type == IPL_TYPE_NSS || + reipl_type == IPL_TYPE_UNKNOWN) + os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR; + os_info_entry_add(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); csum = (__force unsigned int) csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); abs_lc = get_abs_lowcore(); -- cgit v1.2.3