diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 11:13:10 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 11:13:10 -0800 |
commit | 3591b19511ed88e2e82f64b7d7bf54a5f8d10363 (patch) | |
tree | d08896f1aeb2083960bdc5e8537ab9e8d56bd43c /arch/s390 | |
parent | 45f5532a2f65afeda9e8a02bf1aca15c2b4c9be8 (diff) | |
parent | fcc082f35c6d565d351b5b89bb03a82333e9ffe8 (diff) |
Merge tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky:
- A copy of Arnds compat wrapper generation series
- Pass information about the KVM guest to the host in form the control
program code and the control program version code
- Map IOV resources to support PCI physical functions on s390
- Add vector load and store alignment hints to improve performance
- Use the "jdd" constraint with gcc 9 to make jump labels working again
- Remove amode workaround for old z/VM releases from the DCSS code
- Add support for in-kernel performance measurements using the CPU
measurement counter facility
- Introduce a new PMU device cpum_cf_diag to capture counters and store
thenn as event raw data.
- Bug fixes and cleanups
* tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (54 commits)
Revert "s390/cpum_cf: Add kernel message exaplanations"
s390/dasd: fix read device characteristic with CONFIG_VMAP_STACK=y
s390/suspend: fix prefix register reset in swsusp_arch_resume
s390: warn about clearing als implied facilities
s390: allow overriding facilities via command line
s390: clean up redundant facilities list setup
s390/als: remove duplicated in-place implementation of stfle
s390/cio: Use cpa range elsewhere within vfio-ccw
s390/cio: Fix vfio-ccw handling of recursive TICs
s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem
s390/cpum_cf: Handle EBUSY return code from CPU counter facility reservation
s390/cpum_cf: Add kernel message exaplanations
s390/cpum_cf_diag: Add support for s390 counter facility diagnostic trace
s390/cpum_cf: add ctr_stcctm() function
s390/cpum_cf: move common functions into a separate file
s390/cpum_cf: introduce kernel_cpumcf_avail() function
s390/cpu_mf: replace stcctm5() with the stcctm() function
s390/cpu_mf: add store cpu counter multiple instruction support
s390/cpum_cf: Add minimal in-kernel interface for counter measurements
s390/cpum_cf: introduce kernel_cpumcf_alert() to obtain measurement alerts
...
Diffstat (limited to 'arch/s390')
53 files changed, 1693 insertions, 1022 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index ed554b09eb3f..b6e3d0653002 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -75,6 +75,7 @@ config S390 select ARCH_HAS_SET_MEMORY select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX + select ARCH_HAS_SYSCALL_WRAPPER select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK @@ -379,6 +380,7 @@ config COMPAT select COMPAT_BINFMT_ELF if BINFMT_ELF select ARCH_WANT_OLD_COMPAT_IPC select COMPAT_OLD_SIGACTION + select HAVE_UID16 depends on MULTIUSER help Select this option if you want to enable your system kernel to diff --git a/arch/s390/boot/als.c b/arch/s390/boot/als.c index d592e0d90d9f..f902215e9cd9 100644 --- a/arch/s390/boot/als.c +++ b/arch/s390/boot/als.c @@ -7,6 +7,7 @@ #include <asm/facility.h> #include <asm/lowcore.h> #include <asm/sclp.h> +#include "boot.h" /* * The code within this file will be called very early. It may _not_ @@ -58,7 +59,7 @@ static void u16_to_decimal(char *str, u16 val) *str = '\0'; } -static void print_missing_facilities(void) +void print_missing_facilities(void) { static char als_str[80] = "Missing facilities: "; unsigned long val; @@ -90,7 +91,6 @@ static void print_missing_facilities(void) } strcat(als_str, "\n"); sclp_early_printk(als_str); - sclp_early_printk("See Principles of Operations for facility bits\n"); } static void facility_mismatch(void) @@ -98,6 +98,7 @@ static void facility_mismatch(void) sclp_early_printk("The Linux kernel requires more recent processor hardware\n"); print_machine_type(); print_missing_facilities(); + sclp_early_printk("See Principles of Operations for facility bits\n"); disabled_wait(0x8badcccc); } @@ -105,20 +106,7 @@ void verify_facilities(void) { int i; - for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++) - S390_lowcore.stfle_fac_list[i] = 0; - asm volatile( - " stfl 0(0)\n" - : "=m" (S390_lowcore.stfl_fac_list)); - S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32; - if (S390_lowcore.stfl_fac_list & 0x01000000) { - register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1; - - asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */ - : "+d" (reg0) - : "a" (&S390_lowcore.stfle_fac_list) - : "memory", "cc"); - } + __stfle(S390_lowcore.stfle_fac_list, ARRAY_SIZE(S390_lowcore.stfle_fac_list)); for (i = 0; i < ARRAY_SIZE(als); i++) { if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i]) facility_mismatch(); diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h index fc41e2277ea8..82bc06346e05 100644 --- a/arch/s390/boot/boot.h +++ b/arch/s390/boot/boot.h @@ -6,6 +6,8 @@ void startup_kernel(void); void detect_memory(void); void store_ipl_parmblock(void); void setup_boot_command_line(void); +void parse_boot_command_line(void); void setup_memory_end(void); +void print_missing_facilities(void); #endif /* BOOT_BOOT_H */ diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 9dab596be98e..36beb56de021 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -1,10 +1,12 @@ // SPDX-License-Identifier: GPL-2.0 +#include <linux/kernel.h> #include <linux/init.h> #include <linux/ctype.h> #include <asm/ebcdic.h> #include <asm/sclp.h> #include <asm/sections.h> #include <asm/boot_data.h> +#include <asm/facility.h> #include "boot.h" char __bootdata(early_command_line)[COMMAND_LINE_SIZE]; @@ -143,8 +145,66 @@ void setup_boot_command_line(void) append_ipl_block_parm(); } +static void modify_facility(unsigned long nr, bool clear) +{ + if (clear) + __clear_facility(nr, S390_lowcore.stfle_fac_list); + else + __set_facility(nr, S390_lowcore.stfle_fac_list); +} + +static void check_cleared_facilities(void) +{ + unsigned long als[] = { FACILITIES_ALS }; + int i; + + for (i = 0; i < ARRAY_SIZE(als); i++) { + if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i]) { + sclp_early_printk("Warning: The Linux kernel requires facilities cleared via command line option\n"); + print_missing_facilities(); + break; + } + } +} + +static void modify_fac_list(char *str) +{ + unsigned long val, endval; + char *endp; + bool clear; + + while (*str) { + clear = false; + if (*str == '!') { + clear = true; + str++; + } + val = simple_strtoull(str, &endp, 0); + if (str == endp) + break; + str = endp; + if (*str == '-') { + str++; + endval = simple_strtoull(str, &endp, 0); + if (str == endp) + break; + str = endp; + while (val <= endval) { + modify_facility(val, clear); + val++; + } + } else { + modify_facility(val, clear); + } + if (*str != ',') + break; + str++; + } + check_cleared_facilities(); +} + static char command_line_buf[COMMAND_LINE_SIZE] __section(.data); -static void parse_mem_opt(void) +void parse_boot_command_line(void) { char *param, *val; bool enabled; @@ -165,12 +225,14 @@ static void parse_mem_opt(void) if (!rc && !enabled) noexec_disabled = 1; } + + if (!strcmp(param, "facilities")) + modify_fac_list(val); } } void setup_memory_end(void) { - parse_mem_opt(); #ifdef CONFIG_CRASH_DUMP if (!OLDMEM_BASE && early_ipl_block_valid && early_ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP && diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 4d441317cdeb..bdfc5549a299 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -53,6 +53,7 @@ void startup_kernel(void) sclp_early_read_info(); store_ipl_parmblock(); setup_boot_command_line(); + parse_boot_command_line(); setup_memory_end(); detect_memory(); if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { diff --git a/arch/s390/boot/string.c b/arch/s390/boot/string.c index 25aca07898ba..b11e8108773a 100644 --- a/arch/s390/boot/string.c +++ b/arch/s390/boot/string.c @@ -2,6 +2,7 @@ #include <linux/ctype.h> #include <linux/kernel.h> #include <linux/errno.h> +#undef CONFIG_KASAN #include "../lib/string.c" int strncmp(const char *cs, const char *ct, size_t count) diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h index 52348e0a812e..05f3f9aee5fc 100644 --- a/arch/s390/hypfs/hypfs.h +++ b/arch/s390/hypfs/hypfs.h @@ -43,7 +43,7 @@ int hypfs_diag0c_init(void); void hypfs_diag0c_exit(void); /* Set Partition-Resource Parameter */ -int hypfs_sprp_init(void); +void hypfs_sprp_init(void); void hypfs_sprp_exit(void); /* debugfs interface */ @@ -69,9 +69,9 @@ struct hypfs_dbfs_file { struct dentry *dentry; }; -extern int hypfs_dbfs_init(void); +extern void hypfs_dbfs_init(void); extern void hypfs_dbfs_exit(void); -extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); +extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); #endif /* _HYPFS_H_ */ diff --git a/arch/s390/hypfs/hypfs_dbfs.c b/arch/s390/hypfs/hypfs_dbfs.c index b9bdf5c1918e..f4c7dbfaf8ee 100644 --- a/arch/s390/hypfs/hypfs_dbfs.c +++ b/arch/s390/hypfs/hypfs_dbfs.c @@ -78,14 +78,11 @@ static const struct file_operations dbfs_ops = { .unlocked_ioctl = dbfs_ioctl, }; -int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df) +void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df) { df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df, &dbfs_ops); - if (IS_ERR(df->dentry)) - return PTR_ERR(df->dentry); mutex_init(&df->lock); - return 0; } void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df) @@ -93,10 +90,9 @@ void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df) debugfs_remove(df->dentry); } -int hypfs_dbfs_init(void) +void hypfs_dbfs_init(void) { dbfs_dir = debugfs_create_dir("s390_hypfs", NULL); - return PTR_ERR_OR_ZERO(dbfs_dir); } void hypfs_dbfs_exit(void) diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c index 3452e18bb1ca..f0bc4dc3e9bf 100644 --- a/arch/s390/hypfs/hypfs_diag.c +++ b/arch/s390/hypfs/hypfs_diag.c @@ -440,11 +440,10 @@ __init int hypfs_diag_init(void) pr_err("The hardware system does not support hypfs\n"); return -ENODATA; } - if (diag204_info_type == DIAG204_INFO_EXT) { - rc = hypfs_dbfs_create_file(&dbfs_file_d204); - if (rc) - return rc; - } + + if (diag204_info_type == DIAG204_INFO_EXT) + hypfs_dbfs_create_file(&dbfs_file_d204); + if (MACHINE_IS_LPAR) { rc = diag224_get_name_table(); if (rc) { diff --git a/arch/s390/hypfs/hypfs_diag0c.c b/arch/s390/hypfs/hypfs_diag0c.c index cebf05150cc1..72e3140fafb5 100644 --- a/arch/s390/hypfs/hypfs_diag0c.c +++ b/arch/s390/hypfs/hypfs_diag0c.c @@ -54,8 +54,7 @@ static void *diag0c_store(unsigned int *count) if (!cpu_vec) goto fail_put_online_cpus; /* Note: Diag 0c needs 8 byte alignment and real storage */ - diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) + - cpu_count * sizeof(struct hypfs_diag0c_entry), + diag0c_data = kzalloc(struct_size(diag0c_data, entry, cpu_count), GFP_KERNEL | GFP_DMA); if (!diag0c_data) goto fail_kfree_cpu_vec; @@ -125,7 +124,8 @@ int __init hypfs_diag0c_init(void) { if (!MACHINE_IS_VM) return 0; - return hypfs_dbfs_create_file(&dbfs_file_0c); + hypfs_dbfs_create_file(&dbfs_file_0c); + return 0; } /* diff --git a/arch/s390/hypfs/hypfs_sprp.c b/arch/s390/hypfs/hypfs_sprp.c index 601b70786dc8..7d9fb496d155 100644 --- a/arch/s390/hypfs/hypfs_sprp.c +++ b/arch/s390/hypfs/hypfs_sprp.c @@ -137,11 +137,11 @@ static struct hypfs_dbfs_file hypfs_sprp_file = { .unlocked_ioctl = hypfs_sprp_ioctl, }; -int hypfs_sprp_init(void) +void hypfs_sprp_init(void) { if (!sclp.has_sprp) - return 0; - return hypfs_dbfs_create_file(&hypfs_sprp_file); + return; + hypfs_dbfs_create_file(&hypfs_sprp_file); } void hypfs_sprp_exit(void) diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c index c4b7b681e055..42f2375c203e 100644 --- a/arch/s390/hypfs/hypfs_vm.c +++ b/arch/s390/hypfs/hypfs_vm.c @@ -279,7 +279,8 @@ int hypfs_vm_init(void) guest_query = local_guest; else return -EACCES; - return hypfs_dbfs_create_file(&dbfs_file_2fc); + hypfs_dbfs_create_file(&dbfs_file_2fc); + return 0; } void hypfs_vm_exit(void) diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c index c681329fdeec..ccad1398abd4 100644 --- a/arch/s390/hypfs/inode.c +++ b/arch/s390/hypfs/inode.c @@ -456,9 +456,8 @@ static int __init hypfs_init(void) { int rc; - rc = hypfs_dbfs_init(); - if (rc) - return rc; + hypfs_dbfs_init(); + if (hypfs_diag_init()) { rc = -ENODATA; goto fail_dbfs_exit; @@ -467,10 +466,7 @@ static int __init hypfs_init(void) rc = -ENODATA; goto fail_hypfs_diag_exit; } - if (hypfs_sprp_init()) { - rc = -ENODATA; - goto fail_hypfs_vm_exit; - } + hypfs_sprp_init(); if (hypfs_diag0c_init()) { rc = -ENODATA; goto fail_hypfs_sprp_exit; @@ -489,7 +485,6 @@ fail_hypfs_diag0c_exit: hypfs_diag0c_exit(); fail_hypfs_sprp_exit: hypfs_sprp_exit(); -fail_hypfs_vm_exit: hypfs_vm_exit(); fail_hypfs_diag_exit: hypfs_diag_exit(); diff --git a/arch/s390/include/asm/cpu_mcf.h b/arch/s390/include/asm/cpu_mcf.h new file mode 100644 index 000000000000..649b9fc60685 --- /dev/null +++ b/arch/s390/include/asm/cpu_mcf.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Counter facility support definitions for the Linux perf + * + * Copyright IBM Corp. 2019 + * Author(s): Hendrik Brueckner <brueckner@linux.ibm.com> + */ +#ifndef _ASM_S390_CPU_MCF_H +#define _ASM_S390_CPU_MCF_H + +#include <linux/perf_event.h> +#include <asm/cpu_mf.h> + +enum cpumf_ctr_set { + CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */ + CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */ + CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */ + CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */ + CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */ + + /* Maximum number of counter sets */ + CPUMF_CTR_SET_MAX, +}; + +#define CPUMF_LCCTL_ENABLE_SHIFT 16 +#define CPUMF_LCCTL_ACTCTL_SHIFT 0 +static const u64 cpumf_ctr_ctl[CPUMF_CTR_SET_MAX] = { + [CPUMF_CTR_SET_BASIC] = 0x02, + [CPUMF_CTR_SET_USER] = 0x04, + [CPUMF_CTR_SET_CRYPTO] = 0x08, + [CPUMF_CTR_SET_EXT] = 0x01, + [CPUMF_CTR_SET_MT_DIAG] = 0x20, +}; + +static inline void ctr_set_enable(u64 *state, int ctr_set) +{ + *state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT; +} +static inline void ctr_set_disable(u64 *state, int ctr_set) +{ + *state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT); +} +static inline void ctr_set_start(u64 *state, int ctr_set) +{ + *state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT; +} +static inline void ctr_set_stop(u64 *state, int ctr_set) +{ + *state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT); +} + +static inline void ctr_set_multiple_enable(u64 *state, u64 ctrsets) +{ + *state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT; +} + +static inline void ctr_set_multiple_disable(u64 *state, u64 ctrsets) +{ + *state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT); +} + +static inline void ctr_set_multiple_start(u64 *state, u64 ctrsets) +{ + *state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT; +} + +static inline void ctr_set_multiple_stop(u64 *state, u64 ctrsets) +{ + *state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT); +} + +static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest) +{ + switch (set) { + case CPUMF_CTR_SET_BASIC: + return stcctm(BASIC, range, dest); + case CPUMF_CTR_SET_USER: + return stcctm(PROBLEM_STATE, range, dest); + case CPUMF_CTR_SET_CRYPTO: + return stcctm(CRYPTO_ACTIVITY, range, dest); + case CPUMF_CTR_SET_EXT: + return stcctm(EXTENDED, range, dest); + case CPUMF_CTR_SET_MT_DIAG: + return stcctm(MT_DIAG_CLEARING, range, dest); + case CPUMF_CTR_SET_MAX: + return 3; + } + return 3; +} + +struct cpu_cf_events { + struct cpumf_ctr_info info; + atomic_t ctr_set[CPUMF_CTR_SET_MAX]; + atomic64_t alert; + u64 state, tx_state; + unsigned int flags; + unsigned int txn_flags; +}; +DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events); + +bool kernel_cpumcf_avail(void); +int __kernel_cpumcf_begin(void); +unsigned long kernel_cpumcf_alert(int clear); +void __kernel_cpumcf_end(void); + +static inline int kernel_cpumcf_begin(void) +{ + if (!cpum_cf_avail()) + return -ENODEV; + + preempt_disable(); + return __kernel_cpumcf_begin(); +} +static inline void kernel_cpumcf_end(void) +{ + __kernel_cpumcf_end(); + preempt_enable(); +} + +/* Return true if store counter set multiple instruction is available */ +static inline int stccm_avail(void) +{ + return test_facility(142); +} + +#endif /* _ASM_S390_CPU_MCF_H */ diff --git a/arch/s390/include/asm/cpu_mf-insn.h b/arch/s390/include/asm/cpu_mf-insn.h new file mode 100644 index 000000000000..a68b362e0964 --- /dev/null +++ b/arch/s390/include/asm/cpu_mf-insn.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Support for CPU-MF instructions + * + * Copyright IBM Corp. 2019 + * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> + */ +#ifndef _ASM_S390_CPU_MF_INSN_H +#define _ASM_S390_CPU_MF_INSN_H + +#ifdef __ASSEMBLY__ + +/* Macro to generate the STCCTM instruction with a customized + * M3 field designating the counter set. + */ +.macro STCCTM r1 m3 db2 + .insn rsy,0xeb0000000017,\r1,\m3 & 0xf,\db2 +.endm + +#endif /* __ASSEMBLY__ */ + +#endif diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h index bf2cbff926ef..ae3e3221d4b5 100644 --- a/arch/s390/include/asm/cpu_mf.h +++ b/arch/s390/include/asm/cpu_mf.h @@ -12,6 +12,8 @@ #include <linux/errno.h> #include <asm/facility.h> +asm(".include \"asm/cpu_mf-insn.h\"\n"); + #define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */ #define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */ #define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */ @@ -209,17 +211,25 @@ static inline int ecctr(u64 ctr, u64 *val) return cc; } -/* Store CPU counter multiple for the MT utilization counter set */ -static inline int stcctm5(u64 num, u64 *val) +/* Store CPU counter multiple for a particular counter set */ +enum stcctm_ctr_set { + EXTENDED = 0, + BASIC = 1, + PROBLEM_STATE = 2, + CRYPTO_ACTIVITY = 3, + MT_DIAG = 5, + MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */ +}; +static inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest) { int cc; asm volatile ( - " .insn rsy,0xeb0000000017,%2,5,%1\n" + " STCCTM %2,%3,%1\n" " ipm %0\n" " srl %0,28\n" : "=d" (cc) - : "Q" (*val), "d" (num) + : "Q" (*dest), "d" (range), "i" (set) : "cc", "memory"); return cc; } diff --git a/arch/s390/include/asm/diag.h b/arch/s390/include/asm/diag.h index cdbaad50c7c7..19562be22b7e 100644 --- a/arch/s390/include/asm/diag.h +++ b/arch/s390/include/asm/diag.h @@ -32,6 +32,7 @@ enum diag_stat_enum { DIAG_STAT_X2FC, DIAG_STAT_X304, DIAG_STAT_X308, + DIAG_STAT_X318, DIAG_STAT_X500, NR_DIAG_STAT }; @@ -293,6 +294,17 @@ struct diag26c_mac_resp { u8 res[2]; } __aligned(8); +#define CPNC_LINUX 0x4 +union diag318_info { + unsigned long val; + struct { + unsigned int cpnc : 8; + unsigned int cpvc_linux : 24; + unsigned char cpvc_distro[3]; + unsigned char zero; + }; +}; + int diag204(unsigned long subcode, unsigned long size, void *addr); int diag224(void *ptr); int diag26c(void *req, void *resp, enum diag26c_sc subcode); diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h index 8ea270fdc7fb..5a3c95b11952 100644 --- a/arch/s390/include/asm/ftrace.h +++ b/arch/s390/include/asm/ftrace.h @@ -81,5 +81,30 @@ static inline void ftrace_generate_call_insn(struct ftrace_insn *insn, #endif } +/* + * Even though the system call numbers are identical for s390/s390x a + * different system call table is used for compat tasks. This may lead + * to e.g. incorrect or missing trace event sysfs files. + * Therefore simply do not trace compat system calls at all. + * See kernel/trace/trace_syscalls.c. + */ +#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS +static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) +{ + return is_compat_task(); +} + +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME +static inline bool arch_syscall_match_sym_name(const char *sym, + const char *name) +{ + /* + * Skip __s390_ and __s390x_ prefix - due to compat wrappers + * and aliasing some symbols of 64 bit syste |