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Diffstat (limited to 'arch/s390/kernel/early.c')
-rw-r--r--arch/s390/kernel/early.c74
1 files changed, 46 insertions, 28 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index cae14c499511..bf8b4ae7ff2d 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -6,6 +6,9 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>
*/
+#define KMSG_COMPONENT "setup"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/compiler.h>
#include <linux/init.h>
#include <linux/errno.h>
@@ -16,6 +19,7 @@
#include <linux/module.h>
#include <linux/pfn.h>
#include <linux/uaccess.h>
+#include <linux/kernel.h>
#include <asm/ebcdic.h>
#include <asm/ipl.h>
#include <asm/lowcore.h>
@@ -35,8 +39,6 @@
char kernel_nss_name[NSS_NAME_SIZE + 1];
-static unsigned long machine_flags;
-
static void __init setup_boot_command_line(void);
/*
@@ -81,6 +83,8 @@ asm(
" br 14\n"
" .size savesys_ipl_nss, .-savesys_ipl_nss\n");
+static __initdata char upper_command_line[COMMAND_LINE_SIZE];
+
static noinline __init void create_kernel_nss(void)
{
unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size;
@@ -90,7 +94,6 @@ static noinline __init void create_kernel_nss(void)
int response;
size_t len;
char *savesys_ptr;
- char upper_command_line[COMMAND_LINE_SIZE];
char defsys_cmd[DEFSYS_CMD_SIZE];
char savesys_cmd[SAVESYS_CMD_SIZE];
@@ -141,6 +144,8 @@ static noinline __init void create_kernel_nss(void)
__cpcmd(defsys_cmd, NULL, 0, &response);
if (response != 0) {
+ pr_err("Defining the Linux kernel NSS failed with rc=%d\n",
+ response);
kernel_nss_name[0] = '\0';
return;
}
@@ -153,8 +158,11 @@ static noinline __init void create_kernel_nss(void)
* max SAVESYS_CMD_SIZE
* On error: response contains the numeric portion of cp error message.
* for SAVESYS it will be >= 263
+ * for missing privilege class, it will be 1
*/
- if (response > SAVESYS_CMD_SIZE) {
+ if (response > SAVESYS_CMD_SIZE || response == 1) {
+ pr_err("Saving the Linux kernel NSS failed with rc=%d\n",
+ response);
kernel_nss_name[0] = '\0';
return;
}
@@ -205,12 +213,9 @@ static noinline __init void detect_machine_type(void)
/* Running under KVM? If not we assume z/VM */
if (!memcmp(vmms.vm[0].cpi, "\xd2\xe5\xd4", 3))
- machine_flags |= MACHINE_FLAG_KVM;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_KVM;
else
- machine_flags |= MACHINE_FLAG_VM;
-
- /* Store machine flags for setting up lowcore early */
- S390_lowcore.machine_flags = machine_flags;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_VM;
}
static __init void early_pgm_check_handler(void)
@@ -245,7 +250,7 @@ static noinline __init void setup_hpage(void)
facilities = stfl();
if (!(facilities & (1UL << 23)) || !(facilities & (1UL << 29)))
return;
- machine_flags |= MACHINE_FLAG_HPAGE;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE;
__ctl_set_bit(0, 23);
#endif
}
@@ -263,7 +268,7 @@ static __init void detect_mvpg(void)
EX_TABLE(0b,1b)
: "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0");
if (!rc)
- machine_flags |= MACHINE_FLAG_MVPG;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_MVPG;
#endif
}
@@ -279,7 +284,7 @@ static __init void detect_ieee(void)
EX_TABLE(0b,1b)
: "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc");
if (!rc)
- machine_flags |= MACHINE_FLAG_IEEE;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_IEEE;
#endif
}
@@ -298,7 +303,7 @@ static __init void detect_csp(void)
EX_TABLE(0b,1b)
: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2");
if (!rc)
- machine_flags |= MACHINE_FLAG_CSP;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_CSP;
#endif
}
@@ -315,7 +320,7 @@ static __init void detect_diag9c(void)
EX_TABLE(0b,1b)
: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
if (!rc)
- machine_flags |= MACHINE_FLAG_DIAG9C;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C;
}
static __init void detect_diag44(void)
@@ -330,7 +335,7 @@ static __init void detect_diag44(void)
EX_TABLE(0b,1b)
: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc");
if (!rc)
- machine_flags |= MACHINE_FLAG_DIAG44;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44;
#endif
}
@@ -341,11 +346,11 @@ static __init void detect_machine_facilities(void)
facilities = stfl();
if (facilities & (1 << 28))
- machine_flags |= MACHINE_FLAG_IDTE;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
if (facilities & (1 << 23))
- machine_flags |= MACHINE_FLAG_PFMF;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
if (facilities & (1 << 4))
- machine_flags |= MACHINE_FLAG_MVCOS;
+ S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
#endif
}
@@ -367,21 +372,35 @@ static __init void rescue_initrd(void)
}
/* Set up boot command line */
-static void __init setup_boot_command_line(void)
+static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t))
{
- char *parm = NULL;
+ char *parm, *delim;
+ size_t rc, len;
+
+ len = strlen(boot_command_line);
+
+ delim = boot_command_line + len; /* '\0' character position */
+ parm = boot_command_line + len + 1; /* append right after '\0' */
+ rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1);
+ if (rc) {
+ if (*parm == '=')
+ memmove(boot_command_line, parm + 1, rc);
+ else
+ *delim = ' '; /* replace '\0' with space */
+ }
+}
+
+static void __init setup_boot_command_line(void)
+{
/* copy arch command line */
strlcpy(boot_command_line, COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
/* append IPL PARM data to the boot command line */
- if (MACHINE_IS_VM) {
- parm = boot_command_line + strlen(boot_command_line);
- *parm++ = ' ';
- get_ipl_vmparm(parm);
- if (parm[0] == '=')
- memmove(boot_command_line, parm + 1, strlen(parm));
- }
+ if (MACHINE_IS_VM)
+ append_to_cmdline(append_ipl_vmparm);
+
+ append_to_cmdline(append_ipl_scpdata);
}
@@ -413,7 +432,6 @@ void __init startup_init(void)
setup_hpage();
sclp_facilities_detect();
detect_memory_layout(memory_chunk);
- S390_lowcore.machine_flags = machine_flags;
#ifdef CONFIG_DYNAMIC_FTRACE
S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
#endif
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-20 00:49:55 +0000