diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/compat_wrapper.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/ipl.c | 135 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 19 | ||||
| -rw-r--r-- | arch/s390/kernel/syscalls.S | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/vdso32/clock_gettime.S | 10 | ||||
| -rw-r--r-- | arch/s390/kernel/vdso64/clock_gettime.S | 10 |
6 files changed, 123 insertions, 57 deletions
diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c index 45cdb37aa6f8..faf6caa510dc 100644 --- a/arch/s390/kernel/compat_wrapper.c +++ b/arch/s390/kernel/compat_wrapper.c @@ -214,3 +214,6 @@ COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, fla COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags); COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags); COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags); +COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs) +COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags) +COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags) diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 633ca7504536..39badb9ca0b3 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -455,22 +455,6 @@ DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); -static struct attribute *ipl_fcp_attrs[] = { - &sys_ipl_type_attr.attr, - &sys_ipl_device_attr.attr, - &sys_ipl_fcp_wwpn_attr.attr, - &sys_ipl_fcp_lun_attr.attr, - &sys_ipl_fcp_bootprog_attr.attr, - &sys_ipl_fcp_br_lba_attr.attr, - NULL, -}; - -static struct attribute_group ipl_fcp_attr_group = { - .attrs = ipl_fcp_attrs, -}; - -/* CCW ipl device attributes */ - static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, struct kobj_attribute *attr, char *page) { @@ -487,6 +471,23 @@ static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, static struct kobj_attribute sys_ipl_ccw_loadparm_attr = __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); +static struct attribute *ipl_fcp_attrs[] = { + &sys_ipl_type_attr.attr, + &sys_ipl_device_attr.attr, + &sys_ipl_fcp_wwpn_attr.attr, + &sys_ipl_fcp_lun_attr.attr, + &sys_ipl_fcp_bootprog_attr.attr, + &sys_ipl_fcp_br_lba_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group ipl_fcp_attr_group = { + .attrs = ipl_fcp_attrs, +}; + +/* CCW ipl device attributes */ + static struct attribute *ipl_ccw_attrs_vm[] = { &sys_ipl_type_attr.attr, &sys_ipl_device_attr.attr, @@ -765,28 +766,10 @@ DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", reipl_block_fcp->ipl_info.fcp.devno); -static struct attribute *reipl_fcp_attrs[] = { - &sys_reipl_fcp_device_attr.attr, - &sys_reipl_fcp_wwpn_attr.attr, - &sys_reipl_fcp_lun_attr.attr, - &sys_reipl_fcp_bootprog_attr.attr, - &sys_reipl_fcp_br_lba_attr.attr, - NULL, -}; - -static struct attribute_group reipl_fcp_attr_group = { - .attrs = reipl_fcp_attrs, -}; - -/* CCW reipl device attributes */ - -DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", - reipl_block_ccw->ipl_info.ccw.devno); - static void reipl_get_ascii_loadparm(char *loadparm, struct ipl_parameter_block *ibp) { - memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); + memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN); EBCASC(loadparm, LOADPARM_LEN); loadparm[LOADPARM_LEN] = 0; strim(loadparm); @@ -821,13 +804,50 @@ static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, return -EINVAL; } /* initialize loadparm with blanks */ - memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); + memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN); /* copy and convert to ebcdic */ - memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); - ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); + memcpy(ipb->hdr.loadparm, buf, lp_len); + ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN); return len; } +/* FCP wrapper */ +static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return reipl_generic_loadparm_show(reipl_block_fcp, page); +} + +static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return reipl_generic_loadparm_store(reipl_block_fcp, buf, len); +} + +static struct kobj_attribute sys_reipl_fcp_loadparm_attr = + __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show, + reipl_fcp_loadparm_store); + +static struct attribute *reipl_fcp_attrs[] = { + &sys_reipl_fcp_device_attr.attr, + &sys_reipl_fcp_wwpn_attr.attr, + &sys_reipl_fcp_lun_attr.attr, + &sys_reipl_fcp_bootprog_attr.attr, + &sys_reipl_fcp_br_lba_attr.attr, + &sys_reipl_fcp_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group reipl_fcp_attr_group = { + .attrs = reipl_fcp_attrs, +}; + +/* CCW reipl device attributes */ + +DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", + reipl_block_ccw->ipl_info.ccw.devno); + /* NSS wrapper */ static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, struct kobj_attribute *attr, char *page) @@ -1125,11 +1145,10 @@ static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) /* LOADPARM */ /* check if read scp info worked and set loadparm */ if (sclp_ipl_info.is_valid) - memcpy(ipb->ipl_info.ccw.load_parm, - &sclp_ipl_info.loadparm, LOADPARM_LEN); + memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); else /* read scp info failed: set empty loadparm (EBCDIC blanks) */ - memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); + memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN); ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; /* VM PARM */ @@ -1251,9 +1270,16 @@ static int __init reipl_fcp_init(void) return rc; } - if (ipl_info.type == IPL_TYPE_FCP) + if (ipl_info.type == IPL_TYPE_FCP) { memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); - else { + /* + * Fix loadparm: There are systems where the (SCSI) LOADPARM + * is invalid in the SCSI IPL parameter block, so take it + * always from sclp_ipl_info. + */ + memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm, + LOADPARM_LEN); + } else { reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; @@ -1864,7 +1890,23 @@ static void __init shutdown_actions_init(void) static int __init s390_ipl_init(void) { + char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; + sclp_get_ipl_info(&sclp_ipl_info); + /* + * Fix loadparm: There are systems where the (SCSI) LOADPARM + * returned by read SCP info is invalid (contains EBCDIC blanks) + * when the system has been booted via diag308. In that case we use + * the value from diag308, if available. + * + * There are also systems where diag308 store does not work in + * case the system is booted from HMC. Fortunately in this case + * READ SCP info provides the correct value. + */ + if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && + diag308_set_works) + memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, + LOADPARM_LEN); shutdown_actions_init(); shutdown_triggers_init(); return 0; @@ -2060,6 +2102,13 @@ void s390_reset_system(void (*func)(void *), void *data) S390_lowcore.program_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; + /* + * Clear subchannel ID and number to signal new kernel that no CCW or + * SCSI IPL has been done (for kexec and kdump) + */ + S390_lowcore.subchannel_id = 0; + S390_lowcore.subchannel_nr = 0; + /* Store status at absolute zero */ store_status(); diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index ae1d5be7dd88..82bc113e8c1d 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -24,6 +24,7 @@ #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> +#include <linux/random.h> #include <linux/user.h> #include <linux/tty.h> #include <linux/ioport.h> @@ -61,6 +62,7 @@ #include <asm/diag.h> #include <asm/os_info.h> #include <asm/sclp.h> +#include <asm/sysinfo.h> #include "entry.h" /* @@ -766,6 +768,7 @@ static void __init setup_hwcaps(void) #endif get_cpu_id(&cpu_id); + add_device_randomness(&cpu_id, sizeof(cpu_id)); switch (cpu_id.machine) { case 0x9672: #if !defined(CONFIG_64BIT) @@ -804,6 +807,19 @@ static void __init setup_hwcaps(void) } /* + * Add system information as device randomness + */ +static void __init setup_randomness(void) +{ + struct sysinfo_3_2_2 *vmms; + + vmms = (struct sysinfo_3_2_2 *) alloc_page(GFP_KERNEL); + if (vmms && stsi(vmms, 3, 2, 2) == 0 && vmms->count) + add_device_randomness(&vmms, vmms->count); + free_page((unsigned long) vmms); +} + +/* * Setup function called from init/main.c just after the banner * was printed. */ @@ -901,6 +917,9 @@ void __init setup_arch(char **cmdline_p) /* Setup zfcpdump support */ setup_zfcpdump(); + + /* Add system specific data to the random pool */ + setup_randomness(); } #ifdef CONFIG_32BIT diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S index fe5cdf29a001..6fe886ac2db5 100644 --- a/arch/s390/kernel/syscalls.S +++ b/arch/s390/kernel/syscalls.S @@ -356,3 +356,6 @@ SYSCALL(sys_finit_module,sys_finit_module,compat_sys_finit_module) SYSCALL(sys_sched_setattr,sys_sched_setattr,compat_sys_sched_setattr) /* 345 */ SYSCALL(sys_sched_getattr,sys_sched_getattr,compat_sys_sched_getattr) SYSCALL(sys_renameat2,sys_renameat2,compat_sys_renameat2) +SYSCALL(sys_seccomp,sys_seccomp,compat_sys_seccomp) +SYSCALL(sys_getrandom,sys_getrandom,compat_sys_getrandom) +SYSCALL(sys_memfd_create,sys_memfd_create,compat_sys_memfd_create) /* 350 */ diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S index 65fc3979c2f1..7cf18f8d4cb4 100644 --- a/arch/s390/kernel/vdso32/clock_gettime.S +++ b/arch/s390/kernel/vdso32/clock_gettime.S @@ -22,13 +22,11 @@ __kernel_clock_gettime: basr %r5,0 0: al %r5,21f-0b(%r5) /* get &_vdso_data */ chi %r2,__CLOCK_REALTIME - je 10f + je 11f chi %r2,__CLOCK_MONOTONIC jne 19f /* CLOCK_MONOTONIC */ - ltr %r3,%r3 - jz 9f /* tp == NULL */ 1: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */ tml %r4,0x0001 /* pending update ? loop */ jnz 1b @@ -67,12 +65,10 @@ __kernel_clock_gettime: j 6b 8: st %r2,0(%r3) /* store tp->tv_sec */ st %r1,4(%r3) /* store tp->tv_nsec */ -9: lhi %r2,0 + lhi %r2,0 br %r14 /* CLOCK_REALTIME */ -10: ltr %r3,%r3 /* tp == NULL */ - jz 18f 11: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */ tml %r4,0x0001 /* pending update ? loop */ jnz 11b @@ -111,7 +107,7 @@ __kernel_clock_gettime: j 15b 17: st %r2,0(%r3) /* store tp->tv_sec */ st %r1,4(%r3) /* store tp->tv_nsec */ -18: lhi %r2,0 + lhi %r2,0 br %r14 /* Fallback to system call */ diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S index 91940ed33a4a..3f34e09db5f4 100644 --- a/arch/s390/kernel/vdso64/clock_gettime.S +++ b/arch/s390/kernel/vdso64/clock_gettime.S @@ -21,7 +21,7 @@ __kernel_clock_gettime: .cfi_startproc larl %r5,_vdso_data cghi %r2,__CLOCK_REALTIME - je 4f + je 5f cghi %r2,__CLOCK_THREAD_CPUTIME_ID je 9f cghi %r2,-2 /* Per-thread CPUCLOCK with PID=0, VIRT=1 */ @@ -30,8 +30,6 @@ __kernel_clock_gettime: jne 12f /* CLOCK_MONOTONIC */ - ltgr %r3,%r3 - jz 3f /* tp == NULL */ 0: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */ tmll %r4,0x0001 /* pending update ? loop */ jnz 0b @@ -53,12 +51,10 @@ __kernel_clock_gettime: j 1b 2: stg %r0,0(%r3) /* store tp->tv_sec */ stg %r1,8(%r3) /* store tp->tv_nsec */ -3: lghi %r2,0 + lghi %r2,0 br %r14 /* CLOCK_REALTIME */ -4: ltr %r3,%r3 /* tp == NULL */ - jz 8f 5: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */ tmll %r4,0x0001 /* pending update ? loop */ jnz 5b @@ -80,7 +76,7 @@ __kernel_clock_gettime: j 6b 7: stg %r0,0(%r3) /* store tp->tv_sec */ stg %r1,8(%r3) /* store tp->tv_nsec */ -8: lghi %r2,0 + lghi %r2,0 br %r14 /* CLOCK_THREAD_CPUTIME_ID for this thread */ |