From cb6ec7f07e25a580abd06debbb15731e49d5908b Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Mon, 1 Apr 2019 19:10:51 +0200 Subject: [PATCH] s390: move ipl block to .boot.preserved.data section .boot.preserved.data is a better fit for ipl block than .boot.data which is discarded after init. Reusing .boot.preserved.data allows to simplify code a little bit and avoid copying data from .boot.data to persistent variables. Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- arch/s390/boot/ipl_parm.c | 24 ++++++++++++------------ arch/s390/include/asm/boot_data.h | 4 ++-- arch/s390/include/asm/ipl.h | 1 - arch/s390/kernel/early.c | 1 - arch/s390/kernel/ipl.c | 15 ++------------- 5 files changed, 16 insertions(+), 29 deletions(-) diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 36beb56de0217..dc0438d08751f 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -10,8 +10,8 @@ #include "boot.h" char __bootdata(early_command_line)[COMMAND_LINE_SIZE]; -struct ipl_parameter_block __bootdata(early_ipl_block); -int __bootdata(early_ipl_block_valid); +struct ipl_parameter_block __bootdata_preserved(ipl_block); +int __bootdata_preserved(ipl_block_valid); unsigned long __bootdata(memory_end); int __bootdata(memory_end_set); @@ -45,10 +45,10 @@ void store_ipl_parmblock(void) { int rc; - rc = __diag308(DIAG308_STORE, &early_ipl_block); + rc = __diag308(DIAG308_STORE, &ipl_block); if (rc == DIAG308_RC_OK && - early_ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION) - early_ipl_block_valid = 1; + ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION) + ipl_block_valid = 1; } static size_t scpdata_length(const char *buf, size_t count) @@ -103,14 +103,14 @@ static void append_ipl_block_parm(void) delim = early_command_line + len; /* '\0' character position */ parm = early_command_line + len + 1; /* append right after '\0' */ - switch (early_ipl_block.hdr.pbt) { + switch (ipl_block.hdr.pbt) { case DIAG308_IPL_TYPE_CCW: rc = ipl_block_get_ascii_vmparm( - parm, COMMAND_LINE_SIZE - len - 1, &early_ipl_block); + parm, COMMAND_LINE_SIZE - len - 1, &ipl_block); break; case DIAG308_IPL_TYPE_FCP: rc = ipl_block_get_ascii_scpdata( - parm, COMMAND_LINE_SIZE - len - 1, &early_ipl_block); + parm, COMMAND_LINE_SIZE - len - 1, &ipl_block); break; } if (rc) { @@ -141,7 +141,7 @@ void setup_boot_command_line(void) strcpy(early_command_line, strim(COMMAND_LINE)); /* append IPL PARM data to the boot command line */ - if (early_ipl_block_valid) + if (ipl_block_valid) append_ipl_block_parm(); } @@ -234,9 +234,9 @@ void parse_boot_command_line(void) void setup_memory_end(void) { #ifdef CONFIG_CRASH_DUMP - if (!OLDMEM_BASE && early_ipl_block_valid && - early_ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP && - early_ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) { + if (!OLDMEM_BASE && ipl_block_valid && + ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP && + ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) { if (!sclp_early_get_hsa_size(&memory_end) && memory_end) memory_end_set = 1; } diff --git a/arch/s390/include/asm/boot_data.h b/arch/s390/include/asm/boot_data.h index 2d999ccb977a7..d794802a22917 100644 --- a/arch/s390/include/asm/boot_data.h +++ b/arch/s390/include/asm/boot_data.h @@ -5,7 +5,7 @@ #include extern char early_command_line[COMMAND_LINE_SIZE]; -extern struct ipl_parameter_block early_ipl_block; -extern int early_ipl_block_valid; +extern struct ipl_parameter_block ipl_block; +extern int ipl_block_valid; #endif /* _ASM_S390_BOOT_DATA_H */ diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h index a8389e2d2f034..6403cc9952bff 100644 --- a/arch/s390/include/asm/ipl.h +++ b/arch/s390/include/asm/ipl.h @@ -88,7 +88,6 @@ void __init save_area_add_regs(struct save_area *, void *regs); void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs); extern void s390_reset_system(void); -extern void ipl_store_parameters(void); extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size, const struct ipl_parameter_block *ipb); diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index d6edf45f93b9a..c196abda36c77 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -309,7 +309,6 @@ void __init startup_init(void) setup_facility_list(); detect_machine_type(); setup_arch_string(); - ipl_store_parameters(); setup_boot_command_line(); detect_diag9c(); detect_diag44(); diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 18a5d6317accd..d2e8dc60f2cf0 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -119,11 +119,8 @@ static char *dump_type_str(enum dump_type type) } } -struct ipl_parameter_block __bootdata(early_ipl_block); -int __bootdata(early_ipl_block_valid); - -static int ipl_block_valid; -static struct ipl_parameter_block ipl_block; +int __bootdata_preserved(ipl_block_valid); +struct ipl_parameter_block __bootdata_preserved(ipl_block); static int reipl_capabilities = IPL_TYPE_UNKNOWN; @@ -1675,14 +1672,6 @@ void __init setup_ipl(void) atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); } -void __init ipl_store_parameters(void) -{ - if (early_ipl_block_valid) { - memcpy(&ipl_block, &early_ipl_block, sizeof(ipl_block)); - ipl_block_valid = 1; - } -} - void s390_reset_system(void) { /* Disable prefixing */ -- 2.39.5