Commit 033dbbde 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 updates from Martin Schwidefsky:
 "One performance improvement and a few bug fixes.  Two of the fixes
  deal with the clock related problems we have seen on recent kernels"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/mm: handle asce-type exceptions as normal page fault
  s390,time: revert direct ktime path for s390 clockevent device
  s390/time,vdso: convert to the new update_vsyscall interface
  s390/uaccess: add missing page table walk range check
  s390/mm: optimize copy_page
  s390/dasd: validate request size before building CCW/TCW request
  s390/signal: always restore saved runtime instrumentation psw bit
parents dc418f6e 127581b6

arch/s390/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -101,7 +101,7 @@ config S390 
	select GENERIC_CPU_DEVICES if !SMP

	select GENERIC_FIND_FIRST_BIT

	select GENERIC_SMP_IDLE_THREAD

	select GENERIC_TIME_VSYSCALL_OLD

	select GENERIC_TIME_VSYSCALL

	select HAVE_ALIGNED_STRUCT_PAGE if SLUB

	select HAVE_ARCH_JUMP_LABEL if !MARCH_G5

	select HAVE_ARCH_SECCOMP_FILTER

arch/s390/include/asm/page.h

+13 −25
Original line number Diff line number Diff line
@@ -48,33 +48,21 @@ static inline void clear_page(void *page) 
		: "memory", "cc");

}



/*

 * copy_page uses the mvcl instruction with 0xb0 padding byte in order to

 * bypass caches when copying a page. Especially when copying huge pages

 * this keeps L1 and L2 data caches alive.

 */

static inline void copy_page(void *to, void *from)

{

	if (MACHINE_HAS_MVPG) {

		register unsigned long reg0 asm ("0") = 0;

		asm volatile(

			"	mvpg	%0,%1"

			: : "a" (to), "a" (from), "d" (reg0)

			: "memory", "cc");

	} else

	register void *reg2 asm ("2") = to;

	register unsigned long reg3 asm ("3") = 0x1000;

	register void *reg4 asm ("4") = from;

	register unsigned long reg5 asm ("5") = 0xb0001000;

	asm volatile(

			"	mvc	0(256,%0),0(%1)\n"

			"	mvc	256(256,%0),256(%1)\n"

			"	mvc	512(256,%0),512(%1)\n"

			"	mvc	768(256,%0),768(%1)\n"

			"	mvc	1024(256,%0),1024(%1)\n"

			"	mvc	1280(256,%0),1280(%1)\n"

			"	mvc	1536(256,%0),1536(%1)\n"

			"	mvc	1792(256,%0),1792(%1)\n"

			"	mvc	2048(256,%0),2048(%1)\n"

			"	mvc	2304(256,%0),2304(%1)\n"

			"	mvc	2560(256,%0),2560(%1)\n"

			"	mvc	2816(256,%0),2816(%1)\n"

			"	mvc	3072(256,%0),3072(%1)\n"

			"	mvc	3328(256,%0),3328(%1)\n"

			"	mvc	3584(256,%0),3584(%1)\n"

			"	mvc	3840(256,%0),3840(%1)\n"

			: : "a" (to), "a" (from) : "memory");

		"	mvcl	2,4"

		: "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5)

		: : "memory", "cc");

}



#define clear_user_page(page, vaddr, pg)	clear_page(page)

arch/s390/include/asm/vdso.h

+3 −2
Original line number Diff line number Diff line
@@ -26,8 +26,9 @@ struct vdso_data { 
	__u64 wtom_clock_nsec;		/*				0x28 */

	__u32 tz_minuteswest;		/* Minutes west of Greenwich	0x30 */

	__u32 tz_dsttime;		/* Type of dst correction	0x34 */

	__u32 ectg_available;

	__u32 ntp_mult;			/* NTP adjusted multiplier	0x3C */

	__u32 ectg_available;		/* ECTG instruction present	0x38 */

	__u32 tk_mult;			/* Mult. used for xtime_nsec	0x3c */

	__u32 tk_shift;			/* Shift used for xtime_nsec	0x40 */

};



struct vdso_per_cpu_data {

arch/s390/kernel/asm-offsets.c

+2 −1
Original line number Diff line number Diff line
@@ -65,7 +65,8 @@ int main(void) 
	DEFINE(__VDSO_WTOM_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));

	DEFINE(__VDSO_TIMEZONE, offsetof(struct vdso_data, tz_minuteswest));

	DEFINE(__VDSO_ECTG_OK, offsetof(struct vdso_data, ectg_available));

	DEFINE(__VDSO_NTP_MULT, offsetof(struct vdso_data, ntp_mult));

	DEFINE(__VDSO_TK_MULT, offsetof(struct vdso_data, tk_mult));

	DEFINE(__VDSO_TK_SHIFT, offsetof(struct vdso_data, tk_shift));

	DEFINE(__VDSO_ECTG_BASE, offsetof(struct vdso_per_cpu_data, ectg_timer_base));

	DEFINE(__VDSO_ECTG_USER, offsetof(struct vdso_per_cpu_data, ectg_user_time));

	/* constants used by the vdso */

arch/s390/kernel/compat_signal.c

+1 −1
Original line number Diff line number Diff line
@@ -194,7 +194,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) 
		return -EINVAL;



	/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */

	regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |

	regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |

		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 |

		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_RI) << 32 |

		(__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_AMODE);

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