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-rw-r--r--arch/s390/hypfs/hypfs_vm.c2
-rw-r--r--arch/s390/include/asm/irqflags.h2
-rw-r--r--arch/s390/include/asm/timex.h10
-rw-r--r--arch/s390/include/uapi/asm/unistd.h3
-rw-r--r--arch/s390/kernel/module.c10
-rw-r--r--arch/s390/kernel/syscalls.S1
-rw-r--r--arch/s390/kernel/uprobes.c69
-rw-r--r--arch/s390/kernel/vtime.c2
-rw-r--r--arch/s390/mm/fault.c6
-rw-r--r--arch/s390/mm/pgtable.c5
-rw-r--r--arch/s390/net/bpf_jit.S28
-rw-r--r--arch/s390/net/bpf_jit_comp.c17
12 files changed, 106 insertions, 49 deletions
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index 32040ace00ea..afbe07907c10 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -231,7 +231,7 @@ failed:
struct dbfs_d2fc_hdr {
u64 len; /* Length of d2fc buffer without header */
u16 version; /* Version of header */
- char tod_ext[16]; /* TOD clock for d2fc */
+ char tod_ext[STORE_CLOCK_EXT_SIZE]; /* TOD clock for d2fc */
u64 count; /* Number of VM guests in d2fc buffer */
char reserved[30];
} __attribute__ ((packed));
diff --git a/arch/s390/include/asm/irqflags.h b/arch/s390/include/asm/irqflags.h
index 37b9091ab8c0..16aa0c779e07 100644
--- a/arch/s390/include/asm/irqflags.h
+++ b/arch/s390/include/asm/irqflags.h
@@ -36,7 +36,7 @@ static inline notrace void __arch_local_irq_ssm(unsigned long flags)
static inline notrace unsigned long arch_local_save_flags(void)
{
- return __arch_local_irq_stosm(0x00);
+ return __arch_local_irq_stnsm(0xff);
}
static inline notrace unsigned long arch_local_irq_save(void)
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 8beee1cceba4..98eb2a579223 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -67,20 +67,22 @@ static inline void local_tick_enable(unsigned long long comp)
set_clock_comparator(S390_lowcore.clock_comparator);
}
-#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
+#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
+#define STORE_CLOCK_EXT_SIZE 16 /* stcke writes 16 bytes */
typedef unsigned long long cycles_t;
-static inline void get_tod_clock_ext(char clk[16])
+static inline void get_tod_clock_ext(char *clk)
{
- typedef struct { char _[sizeof(clk)]; } addrtype;
+ typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
}
static inline unsigned long long get_tod_clock(void)
{
- unsigned char clk[16];
+ unsigned char clk[STORE_CLOCK_EXT_SIZE];
+
get_tod_clock_ext(clk);
return *((unsigned long long *)&clk[1]);
}
diff --git a/arch/s390/include/uapi/asm/unistd.h b/arch/s390/include/uapi/asm/unistd.h
index 2b446cf0cc65..67878af257a0 100644
--- a/arch/s390/include/uapi/asm/unistd.h
+++ b/arch/s390/include/uapi/asm/unistd.h
@@ -289,7 +289,8 @@
#define __NR_bpf 351
#define __NR_s390_pci_mmio_write 352
#define __NR_s390_pci_mmio_read 353
-#define NR_syscalls 354
+#define __NR_execveat 354
+#define NR_syscalls 355
/*
* There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index b89b59158b95..409d152585be 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -55,14 +55,10 @@ void *module_alloc(unsigned long size)
}
#endif
-/* Free memory returned from module_alloc */
-void module_free(struct module *mod, void *module_region)
+void module_arch_freeing_init(struct module *mod)
{
- if (mod) {
- vfree(mod->arch.syminfo);
- mod->arch.syminfo = NULL;
- }
- vfree(module_region);
+ vfree(mod->arch.syminfo);
+ mod->arch.syminfo = NULL;
}
static void check_rela(Elf_Rela *rela, struct module *me)
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index a2987243bc76..939ec474b1dd 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -362,3 +362,4 @@ SYSCALL(sys_memfd_create,sys_memfd_create,compat_sys_memfd_create) /* 350 */
SYSCALL(sys_bpf,sys_bpf,compat_sys_bpf)
SYSCALL(sys_ni_syscall,sys_s390_pci_mmio_write,compat_sys_s390_pci_mmio_write)
SYSCALL(sys_ni_syscall,sys_s390_pci_mmio_read,compat_sys_s390_pci_mmio_read)
+SYSCALL(sys_execveat,sys_execveat,compat_sys_execveat)
diff --git a/arch/s390/kernel/uprobes.c b/arch/s390/kernel/uprobes.c
index f6b3cd056ec2..cc7328080b60 100644
--- a/arch/s390/kernel/uprobes.c
+++ b/arch/s390/kernel/uprobes.c
@@ -48,6 +48,30 @@ bool arch_uprobe_xol_was_trapped(struct task_struct *tsk)
return false;
}
+static int check_per_event(unsigned short cause, unsigned long control,
+ struct pt_regs *regs)
+{
+ if (!(regs->psw.mask & PSW_MASK_PER))
+ return 0;
+ /* user space single step */
+ if (control == 0)
+ return 1;
+ /* over indication for storage alteration */
+ if ((control & 0x20200000) && (cause & 0x2000))
+ return 1;
+ if (cause & 0x8000) {
+ /* all branches */
+ if ((control & 0x80800000) == 0x80000000)
+ return 1;
+ /* branch into selected range */
+ if (((control & 0x80800000) == 0x80800000) &&
+ regs->psw.addr >= current->thread.per_user.start &&
+ regs->psw.addr <= current->thread.per_user.end)
+ return 1;
+ }
+ return 0;
+}
+
int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
{
int fixup = probe_get_fixup_type(auprobe->insn);
@@ -71,9 +95,13 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
if (regs->psw.addr - utask->xol_vaddr == ilen)
regs->psw.addr = utask->vaddr + ilen;
}
- /* If per tracing was active generate trap */
- if (regs->psw.mask & PSW_MASK_PER)
- do_per_trap(regs);
+ if (check_per_event(current->thread.per_event.cause,
+ current->thread.per_user.control, regs)) {
+ /* fix per address */
+ current->thread.per_event.address = utask->vaddr;
+ /* trigger per event */
+ set_pt_regs_flag(regs, PIF_PER_TRAP);
+ }
return 0;
}
@@ -106,6 +134,7 @@ void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
clear_thread_flag(TIF_UPROBE_SINGLESTEP);
regs->int_code = auprobe->saved_int_code;
regs->psw.addr = current->utask->vaddr;
+ current->thread.per_event.address = current->utask->vaddr;
}
unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline,
@@ -146,17 +175,20 @@ static void adjust_psw_addr(psw_t *psw, unsigned long len)
__rc; \
})
-#define emu_store_ril(ptr, input) \
+#define emu_store_ril(regs, ptr, input) \
({ \
unsigned int mask = sizeof(*(ptr)) - 1; \
+ __typeof__(ptr) __ptr = (ptr); \
int __rc = 0; \
\
if (!test_facility(34)) \
__rc = EMU_ILLEGAL_OP; \
- else if ((u64 __force)ptr & mask) \
+ else if ((u64 __force)__ptr & mask) \
__rc = EMU_SPECIFICATION; \
- else if (put_user(*(input), ptr)) \
+ else if (put_user(*(input), __ptr)) \
__rc = EMU_ADDRESSING; \
+ if (__rc == 0) \
+ sim_stor_event(regs, __ptr, mask + 1); \
__rc; \
})
@@ -198,6 +230,25 @@ union split_register {
};
/*
+ * If user per registers are setup to trace storage alterations and an
+ * emulated store took place on a fitting address a user trap is generated.
+ */
+static void sim_stor_event(struct pt_regs *regs, void *addr, int len)
+{
+ if (!(regs->psw.mask & PSW_MASK_PER))
+ return;
+ if (!(current->thread.per_user.control & PER_EVENT_STORE))
+ return;
+ if ((void *)current->thread.per_user.start > (addr + len))
+ return;
+ if ((void *)current->thread.per_user.end < addr)
+ return;
+ current->thread.per_event.address = regs->psw.addr;
+ current->thread.per_event.cause = PER_EVENT_STORE >> 16;
+ set_pt_regs_flag(regs, PIF_PER_TRAP);
+}
+
+/*
* pc relative instructions are emulated, since parameters may not be
* accessible from the xol area due to range limitations.
*/
@@ -249,13 +300,13 @@ static void handle_insn_ril(struct arch_uprobe *auprobe, struct pt_regs *regs)
rc = emu_load_ril((u32 __user *)uptr, &rx->u64);
break;
case 0x07: /* sthrl */
- rc = emu_store_ril((u16 __user *)uptr, &rx->u16[3]);
+ rc = emu_store_ril(regs, (u16 __user *)uptr, &rx->u16[3]);
break;
case 0x0b: /* stgrl */
- rc = emu_store_ril((u64 __user *)uptr, &rx->u64);
+ rc = emu_store_ril(regs, (u64 __user *)uptr, &rx->u64);
break;
case 0x0f: /* strl */
- rc = emu_store_ril((u32 __user *)uptr, &rx->u32[1]);
+ rc = emu_store_ril(regs, (u32 __user *)uptr, &rx->u32[1]);
break;
}
break;
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 7f0089d9a4aa..e34122e539a1 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -128,8 +128,6 @@ void vtime_account_irq_enter(struct task_struct *tsk)
struct thread_info *ti = task_thread_info(tsk);
u64 timer, system;
- WARN_ON_ONCE(!irqs_disabled());
-
timer = S390_lowcore.last_update_timer;
S390_lowcore.last_update_timer = get_vtimer();
S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 811937bb90be..9065d5aa3932 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -374,6 +374,12 @@ static noinline void do_fault_error(struct pt_regs *regs, int fault)
do_no_context(regs);
else
pagefault_out_of_memory();
+ } else if (fault & VM_FAULT_SIGSEGV) {
+ /* Kernel mode? Handle exceptions or die */
+ if (!user_mode(regs))
+ do_no_context(regs);
+ else
+ do_sigsegv(regs, SEGV_MAPERR);
} else if (fault & VM_FAULT_SIGBUS) {
/* Kernel mode? Handle exceptions or die */
if (!user_mode(regs))
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index be99357d238c..3cf8cc03fff6 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -322,11 +322,12 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
static unsigned long __gmap_segment_gaddr(unsigned long *entry)
{
struct page *page;
- unsigned long offset;
+ unsigned long offset, mask;
offset = (unsigned long) entry / sizeof(unsigned long);
offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE;
- page = pmd_to_page((pmd_t *) entry);
+ mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
+ page = virt_to_page((void *)((unsigned long) entry & mask));
return page->index + offset;
}
diff --git a/arch/s390/net/bpf_jit.S b/arch/s390/net/bpf_jit.S
index 7e45d13816c1..ba44c9f55346 100644
--- a/arch/s390/net/bpf_jit.S
+++ b/arch/s390/net/bpf_jit.S
@@ -22,8 +22,8 @@
* skb_copy_bits takes 4 parameters:
* %r2 = skb pointer
* %r3 = offset into skb data
- * %r4 = length to copy
- * %r5 = pointer to temp buffer
+ * %r4 = pointer to temp buffer
+ * %r5 = length to copy
*/
#define SKBDATA %r8
@@ -44,8 +44,9 @@ ENTRY(sk_load_word)
sk_load_word_slow:
lgr %r9,%r2 # save %r2
- lhi %r4,4 # 4 bytes
- la %r5,160(%r15) # pointer to temp buffer
+ lgr %r3,%r1 # offset
+ la %r4,160(%r15) # pointer to temp buffer
+ lghi %r5,4 # 4 bytes
brasl %r14,skb_copy_bits # get data from skb
l %r5,160(%r15) # load result from temp buffer
ltgr %r2,%r2 # set cc to (%r2 != 0)
@@ -69,8 +70,9 @@ ENTRY(sk_load_half)
sk_load_half_slow:
lgr %r9,%r2 # save %r2
- lhi %r4,2 # 2 bytes
- la %r5,162(%r15) # pointer to temp buffer
+ lgr %r3,%r1 # offset
+ la %r4,162(%r15) # pointer to temp buffer
+ lghi %r5,2 # 2 bytes
brasl %r14,skb_copy_bits # get data from skb
xc 160(2,%r15),160(%r15)
l %r5,160(%r15) # load result from temp buffer
@@ -95,8 +97,9 @@ ENTRY(sk_load_byte)
sk_load_byte_slow:
lgr %r9,%r2 # save %r2
- lhi %r4,1 # 1 bytes
- la %r5,163(%r15) # pointer to temp buffer
+ lgr %r3,%r1 # offset
+ la %r4,163(%r15) # pointer to temp buffer
+ lghi %r5,1 # 1 byte
brasl %r14,skb_copy_bits # get data from skb
xc 160(3,%r15),160(%r15)
l %r5,160(%r15) # load result from temp buffer
@@ -104,11 +107,11 @@ sk_load_byte_slow:
lgr %r2,%r9 # restore %r2
br %r8
- /* A = (*(u8 *)(skb->data+K) & 0xf) << 2 */
+ /* X = (*(u8 *)(skb->data+K) & 0xf) << 2 */
ENTRY(sk_load_byte_msh)
llgfr %r1,%r3 # extend offset
clr %r11,%r3 # hlen < offset ?
- jle sk_load_byte_slow
+ jle sk_load_byte_msh_slow
lhi %r12,0
ic %r12,0(%r1,%r10) # get byte from skb
nill %r12,0x0f
@@ -118,8 +121,9 @@ ENTRY(sk_load_byte_msh)
sk_load_byte_msh_slow:
lgr %r9,%r2 # save %r2
- lhi %r4,2 # 2 bytes
- la %r5,162(%r15) # pointer to temp buffer
+ lgr %r3,%r1 # offset
+ la %r4,163(%r15) # pointer to temp buffer
+ lghi %r5,1 # 1 byte
brasl %r14,skb_copy_bits # get data from skb
xc 160(3,%r15),160(%r15)
l %r12,160(%r15) # load result from temp buffer
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index c52ac77408ca..bbd1981cc150 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -431,8 +431,8 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct sock_filter *filter,
EMIT4_DISP(0x88500000, K);
break;
case BPF_ALU | BPF_NEG: /* A = -A */
- /* lnr %r5,%r5 */
- EMIT2(0x1155);
+ /* lcr %r5,%r5 */
+ EMIT2(0x1355);
break;
case BPF_JMP | BPF_JA: /* ip += K */
offset = addrs[i + K] + jit->start - jit->prg;
@@ -448,15 +448,12 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct sock_filter *filter,
mask = 0x800000; /* je */
kbranch: /* Emit compare if the branch targets are different */
if (filter->jt != filter->jf) {
- if (K <= 16383)
- /* chi %r5,<K> */
- EMIT4_IMM(0xa75e0000, K);
- else if (test_facility(21))
+ if (test_facility(21))
/* clfi %r5,<K> */
EMIT6_IMM(0xc25f0000, K);
else
- /* c %r5,<d(K)>(%r13) */
- EMIT4_DISP(0x5950d000, EMIT_CONST(K));
+ /* cl %r5,<d(K)>(%r13) */
+ EMIT4_DISP(0x5550d000, EMIT_CONST(K));
}
branch: if (filter->jt == filter->jf) {
if (filter->jt == 0)
@@ -502,8 +499,8 @@ branch: if (filter->jt == filter->jf) {
xbranch: /* Emit compare if the branch targets are different */
if (filter->jt != filter->jf) {
jit->seen |= SEEN_XREG;
- /* cr %r5,%r12 */
- EMIT2(0x195c);
+ /* clr %r5,%r12 */
+ EMIT2(0x155c);
}
goto branch;
case BPF_JMP | BPF_JSET | BPF_X: /* ip += (A & X) ? jt : jf */
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