Commit 162bdafa authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 fixes from Martin Schwidefsky:
 "A couple of bux fixes, notable are the regression with ptrace vs
  restarting system calls and the patch for kdump to be able to copy
  from virtual memory"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: fix system call restart after inferior call
  s390: Allow vmalloc target buffers for copy_from_oldmem()
  s390/sclp: properly detect line mode console
  s390/kprobes: add exrl to list of prohibited opcodes
  s390/3270: fix return value check in tty3270_resize_work()
parents d0e639c9 dbbfe487

arch/s390/kernel/crash_dump.c

+20 −22
Original line number Diff line number Diff line
@@ -40,28 +40,26 @@ static inline void *load_real_addr(void *addr) 
}



/*

 * Copy up to one page to vmalloc or real memory

 * Copy real to virtual or real memory

 */

static ssize_t copy_page_real(void *buf, void *src, size_t csize)

static int copy_from_realmem(void *dest, void *src, size_t count)

{

	size_t size;

	unsigned long size;

	int rc;



	if (is_vmalloc_addr(buf)) {

		BUG_ON(csize >= PAGE_SIZE);

		/* If buf is not page aligned, copy first part */

		size = min(roundup(__pa(buf), PAGE_SIZE) - __pa(buf), csize);

		if (size) {

			if (memcpy_real(load_real_addr(buf), src, size))

	if (!count)

		return 0;

	if (!is_vmalloc_or_module_addr(dest))

		return memcpy_real(dest, src, count);

	do {

		size = min(count, PAGE_SIZE - (__pa(dest) & ~PAGE_MASK));

		if (memcpy_real(load_real_addr(dest), src, size))

			return -EFAULT;

			buf += size;

		count -= size;

		dest += size;

		src += size;

		}

		/* Copy second part */

		size = csize - size;

		return (size) ? memcpy_real(load_real_addr(buf), src, size) : 0;

	} else {

		return memcpy_real(buf, src, csize);

	}

	} while (count);

	return 0;

}



/*
@@ -114,7 +112,7 @@ static ssize_t copy_oldmem_page_kdump(char *buf, size_t csize, 
		rc = copy_to_user_real((void __force __user *) buf,

				       (void *) src, csize);

	else

		rc = copy_page_real(buf, (void *) src, csize);

		rc = copy_from_realmem(buf, (void *) src, csize);

	return (rc == 0) ? rc : csize;

}
@@ -210,7 +208,7 @@ int copy_from_oldmem(void *dest, void *src, size_t count) 
	if (OLDMEM_BASE) {

		if ((unsigned long) src < OLDMEM_SIZE) {

			copied = min(count, OLDMEM_SIZE - (unsigned long) src);

			rc = memcpy_real(dest, src + OLDMEM_BASE, copied);

			rc = copy_from_realmem(dest, src + OLDMEM_BASE, copied);

			if (rc)

				return rc;

		}
@@ -223,7 +221,7 @@ int copy_from_oldmem(void *dest, void *src, size_t count) 
				return rc;

		}

	}

	return memcpy_real(dest + copied, src + copied, count - copied);

	return copy_from_realmem(dest + copied, src + copied, count - copied);

}



/*

arch/s390/kernel/entry.S

+1 −0
Original line number Diff line number Diff line
@@ -266,6 +266,7 @@ sysc_sigpending: 
	tm	__TI_flags+3(%r12),_TIF_SYSCALL

	jno	sysc_return

	lm	%r2,%r7,__PT_R2(%r11)	# load svc arguments

	l	%r10,__TI_sysc_table(%r12)	# 31 bit system call table

	xr	%r8,%r8			# svc 0 returns -ENOSYS

	clc	__PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2)

	jnl	sysc_nr_ok		# invalid svc number -> do svc 0

arch/s390/kernel/entry64.S

+1 −0
Original line number Diff line number Diff line
@@ -297,6 +297,7 @@ sysc_sigpending: 
	tm	__TI_flags+7(%r12),_TIF_SYSCALL

	jno	sysc_return

	lmg	%r2,%r7,__PT_R2(%r11)	# load svc arguments

	lg	%r10,__TI_sysc_table(%r12)	# address of system call table

	lghi	%r8,0			# svc 0 returns -ENOSYS

	llgh	%r1,__PT_INT_CODE+2(%r11)	# load new svc number

	cghi	%r1,NR_syscalls

arch/s390/kernel/kprobes.c

+5 −1
Original line number Diff line number Diff line
@@ -67,6 +67,11 @@ static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn) 
	case 0xac:	/* stnsm */

	case 0xad:	/* stosm */

		return -EINVAL;

	case 0xc6:

		switch (insn[0] & 0x0f) {

		case 0x00: /* exrl   */

			return -EINVAL;

		}

	}

	switch (insn[0]) {

	case 0x0101:	/* pr	 */
@@ -180,7 +185,6 @@ static int __kprobes is_insn_relative_long(kprobe_opcode_t *insn) 
		break;

	case 0xc6:

		switch (insn[0] & 0x0f) {

		case 0x00: /* exrl   */

		case 0x02: /* pfdrl  */

		case 0x04: /* cghrl  */

		case 0x05: /* chrl   */

drivers/s390/char/sclp_cmd.c

+5 −3
Original line number Diff line number Diff line
@@ -145,9 +145,11 @@ bool __init sclp_has_linemode(void) 


	if (sccb->header.response_code != 0x20)

		return 0;

	if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK))

		return 1;

	if (!(sccb->sclp_send_mask & (EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK)))

		return 0;

	if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))

		return 0;

	return 1;

}



bool __init sclp_has_vt220(void)

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