Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] boot cputime accounting [S390] add read_persistent_clock [S390] cpu hotplug and accounting values [S390] fix idle time accounting [S390] smp: fix cpu_possible_map initialization [S390] dasd: fix idaw boundary checking for track based ccw [S390] dasd: Use the new async framework for autoonlining. [S390] qdio: remove dead timeout handler [S390] appldata: Use new mod_virt_timer_periodic() function. [S390] extend virtual timer interface by mod_virt_timer_periodic [S390] stp synchronization retry timer [S390] call nmi_enter/nmi_exit on machine checks [S390] wire up preadv/pwritev system calls [S390] s390: move machine flags to lowcore
git-mirror · Apr 15, 2009 · 31712ee · 31712ee
2 parents 3ee8da8 + ab96e79
commit 31712ee
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Showing 26 changed files with 280 additions and 159 deletions.
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
@@ -176,7 +176,7 @@ static void __appldata_mod_vtimer_wrap(void *p) {
 		struct vtimer_list *timer;
 		u64    expires;
 	} *args = p;
-	mod_virt_timer(args->timer, args->expires);
+	mod_virt_timer_periodic(args->timer, args->expires);
 }
 
 #define APPLDATA_ADD_TIMER	0

diff --git a/arch/s390/include/asm/cpuid.h b/arch/s390/include/asm/cpuid.h
@@ -0,0 +1,25 @@
+/*
+ *    Copyright IBM Corp. 2000,2009
+ *    Author(s): Hartmut Penner <hp@de.ibm.com>,
+ *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *		 Christian Ehrhardt <ehrhardt@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_CPUID_H_
+#define _ASM_S390_CPUID_H_
+
+/*
+ *  CPU type and hardware bug flags. Kept separately for each CPU.
+ *  Members of this structure are referenced in head.S, so think twice
+ *  before touching them. [mj]
+ */
+
+typedef struct
+{
+	unsigned int version :	8;
+	unsigned int ident   : 24;
+	unsigned int machine : 16;
+	unsigned int unused  : 16;
+} __attribute__ ((packed)) cpuid_t;
+
+#endif /* _ASM_S390_CPUID_H_ */
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
@@ -15,6 +15,7 @@
 #define ASM_KVM_HOST_H
 #include <linux/kvm_host.h>
 #include <asm/debug.h>
+#include <asm/cpuid.h>
 
 #define KVM_MAX_VCPUS 64
 #define KVM_MEMORY_SLOTS 32

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
@@ -66,6 +66,7 @@
 #define __LC_USER_EXEC_ASCE		0x02ac
 #define __LC_CPUID			0x02b0
 #define __LC_INT_CLOCK			0x02c8
+#define __LC_MACHINE_FLAGS		0x02d8
 #define __LC_IRB			0x0300
 #define __LC_PFAULT_INTPARM		0x0080
 #define __LC_CPU_TIMER_SAVE_AREA	0x00d8
@@ -110,6 +111,7 @@
 #define __LC_CPUID			0x0320
 #define __LC_INT_CLOCK			0x0340
 #define __LC_VDSO_PER_CPU		0x0350
+#define __LC_MACHINE_FLAGS		0x0358
 #define __LC_IRB			0x0380
 #define __LC_PASTE			0x03c0
 #define __LC_PFAULT_INTPARM		0x11b8
@@ -127,9 +129,9 @@
 
 #ifndef __ASSEMBLY__
 
-#include <asm/processor.h>
+#include <asm/cpuid.h>
+#include <asm/ptrace.h>
 #include <linux/types.h>
-#include <asm/sigp.h>
 
 void restart_int_handler(void);
 void ext_int_handler(void);
@@ -277,7 +279,8 @@ struct _lowcore
 	__u32	ext_call_fast;			/* 0x02c4 */
 	__u64	int_clock;			/* 0x02c8 */
 	__u64	clock_comparator;		/* 0x02d0 */
-	__u8	pad_0x02d8[0x0300-0x02d8];	/* 0x02d8 */
+	__u32	machine_flags;			/* 0x02d8 */
+	__u8	pad_0x02dc[0x0300-0x02dc];	/* 0x02dc */
 
 	/* Interrupt response block */
 	__u8	irb[64];			/* 0x0300 */
@@ -381,7 +384,8 @@ struct _lowcore
 	__u64	int_clock;			/* 0x0340 */
 	__u64	clock_comparator;		/* 0x0348 */
 	__u64	vdso_per_cpu_data;		/* 0x0350 */
-	__u8	pad_0x0358[0x0380-0x0358];	/* 0x0358 */
+	__u64	machine_flags;			/* 0x0358 */
+	__u8	pad_0x0360[0x0380-0x0360];	/* 0x0360 */
 
 	/* Interrupt response block. */
 	__u8	irb[64];			/* 0x0380 */

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
@@ -14,7 +14,10 @@
 #define __ASM_S390_PROCESSOR_H
 
 #include <linux/linkage.h>
+#include <asm/cpuid.h>
+#include <asm/page.h>
 #include <asm/ptrace.h>
+#include <asm/setup.h>
 
 #ifdef __KERNEL__
 /*
@@ -23,20 +26,6 @@
  */
 #define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
 
-/*
- *  CPU type and hardware bug flags. Kept separately for each CPU.
- *  Members of this structure are referenced in head.S, so think twice
- *  before touching them. [mj]
- */
-
-typedef struct
-{
-        unsigned int version :  8;
-        unsigned int ident   : 24;
-        unsigned int machine : 16;
-        unsigned int unused  : 16;
-} __attribute__ ((packed)) cpuid_t;
-
 static inline void get_cpu_id(cpuid_t *ptr)
 {
 	asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));

diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
@@ -313,8 +313,6 @@ typedef struct
 
 
 #ifdef __KERNEL__
-#include <asm/setup.h>
-#include <asm/page.h>
 
 /*
  * The pt_regs struct defines the way the registers are stored on

diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
@@ -14,6 +14,7 @@
 
 #ifdef __KERNEL__
 
+#include <asm/lowcore.h>
 #include <asm/types.h>
 
 #define PARMAREA		0x10400
@@ -63,7 +64,6 @@ extern unsigned int s390_noexec;
 /*
  * Machine features detected in head.S
  */
-extern unsigned long machine_flags;
 
 #define MACHINE_FLAG_VM		(1UL << 0)
 #define MACHINE_FLAG_IEEE	(1UL << 1)
@@ -77,28 +77,28 @@ extern unsigned long machine_flags;
 #define MACHINE_FLAG_HPAGE	(1UL << 10)
 #define MACHINE_FLAG_PFMF	(1UL << 11)
 
-#define MACHINE_IS_VM		(machine_flags & MACHINE_FLAG_VM)
-#define MACHINE_IS_KVM		(machine_flags & MACHINE_FLAG_KVM)
-#define MACHINE_HAS_DIAG9C	(machine_flags & MACHINE_FLAG_DIAG9C)
+#define MACHINE_IS_VM		(S390_lowcore.machine_flags & MACHINE_FLAG_VM)
+#define MACHINE_IS_KVM		(S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
+#define MACHINE_HAS_DIAG9C	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
 
 #ifndef __s390x__
-#define MACHINE_HAS_IEEE	(machine_flags & MACHINE_FLAG_IEEE)
-#define MACHINE_HAS_CSP		(machine_flags & MACHINE_FLAG_CSP)
+#define MACHINE_HAS_IEEE	(S390_lowcore.machine_flags & MACHINE_FLAG_IEEE)
+#define MACHINE_HAS_CSP		(S390_lowcore.machine_flags & MACHINE_FLAG_CSP)
 #define MACHINE_HAS_IDTE	(0)
 #define MACHINE_HAS_DIAG44	(1)
-#define MACHINE_HAS_MVPG	(machine_flags & MACHINE_FLAG_MVPG)
+#define MACHINE_HAS_MVPG	(S390_lowcore.machine_flags & MACHINE_FLAG_MVPG)
 #define MACHINE_HAS_MVCOS	(0)
 #define MACHINE_HAS_HPAGE	(0)
 #define MACHINE_HAS_PFMF	(0)
 #else /* __s390x__ */
 #define MACHINE_HAS_IEEE	(1)
 #define MACHINE_HAS_CSP		(1)
-#define MACHINE_HAS_IDTE	(machine_flags & MACHINE_FLAG_IDTE)
-#define MACHINE_HAS_DIAG44	(machine_flags & MACHINE_FLAG_DIAG44)
+#define MACHINE_HAS_IDTE	(S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
+#define MACHINE_HAS_DIAG44	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44)
 #define MACHINE_HAS_MVPG	(1)
-#define MACHINE_HAS_MVCOS	(machine_flags & MACHINE_FLAG_MVCOS)
-#define MACHINE_HAS_HPAGE	(machine_flags & MACHINE_FLAG_HPAGE)
-#define MACHINE_HAS_PFMF	(machine_flags & MACHINE_FLAG_PFMF)
+#define MACHINE_HAS_MVCOS	(S390_lowcore.machine_flags & MACHINE_FLAG_MVCOS)
+#define MACHINE_HAS_HPAGE	(S390_lowcore.machine_flags & MACHINE_FLAG_HPAGE)
+#define MACHINE_HAS_PFMF	(S390_lowcore.machine_flags & MACHINE_FLAG_PFMF)
 #endif /* __s390x__ */
 
 #define ZFCPDUMP_HSA_SIZE	(32UL<<20)

diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
@@ -31,8 +31,9 @@
 #define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)
 
 #ifndef __ASSEMBLY__
-#include <asm/processor.h>
 #include <asm/lowcore.h>
+#include <asm/page.h>
+#include <asm/processor.h>
 
 /*
  * low level task data that entry.S needs immediate access to

diff --git a/arch/s390/include/asm/timer.h b/arch/s390/include/asm/timer.h
@@ -41,6 +41,7 @@ extern void init_virt_timer(struct vtimer_list *timer);
 extern void add_virt_timer(void *new);
 extern void add_virt_timer_periodic(void *new);
 extern int mod_virt_timer(struct vtimer_list *timer, __u64 expires);
+extern int mod_virt_timer_periodic(struct vtimer_list *timer, __u64 expires);
 extern int del_virt_timer(struct vtimer_list *timer);
 
 extern void init_cpu_vtimer(void);

diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
@@ -11,6 +11,9 @@
 #ifndef _ASM_S390_TIMEX_H
 #define _ASM_S390_TIMEX_H
 
+/* The value of the TOD clock for 1.1.1970. */
+#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
+
 /* Inline functions for clock register access. */
 static inline int set_clock(__u64 time)
 {
@@ -85,4 +88,6 @@ int get_sync_clock(unsigned long long *clock);
 void init_cpu_timer(void);
 unsigned long long monotonic_clock(void);
 
+extern u64 sched_clock_base_cc;
+
 #endif
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
@@ -265,7 +265,9 @@
 #define __NR_pipe2		325
 #define __NR_dup3		326
 #define __NR_epoll_create1	327
-#define NR_syscalls 328
+#define	__NR_preadv		328
+#define	__NR_pwritev		329
+#define NR_syscalls 330
 
 /* 
  * There are some system calls that are not present on 64 bit, some

diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
@@ -27,6 +27,8 @@ int main(void)
 	DEFINE(__TI_flags, offsetof(struct thread_info, flags));
 	DEFINE(__TI_cpu, offsetof(struct thread_info, cpu));
 	DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count));
+	DEFINE(__TI_user_timer, offsetof(struct thread_info, user_timer));
+	DEFINE(__TI_system_timer, offsetof(struct thread_info, system_timer));
 	BLANK();
 	DEFINE(__PT_ARGS, offsetof(struct pt_regs, args));
 	DEFINE(__PT_PSW, offsetof(struct pt_regs, psw));

diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
@@ -1805,3 +1805,21 @@ compat_sys_keyctl_wrapper:
 	llgfr	%r5,%r5			# u32
 	llgfr	%r6,%r6			# u32
 	jg	compat_sys_keyctl	# branch to system call
+
+	.globl	compat_sys_preadv_wrapper
+compat_sys_preadv_wrapper:
+	llgfr	%r2,%r2			# unsigned long
+	llgtr	%r3,%r3			# compat_iovec *
+	llgfr	%r4,%r4			# unsigned long
+	llgfr	%r5,%r5			# u32
+	llgfr	%r6,%r6			# u32
+	jg	compat_sys_preadv	# branch to system call
+
+	.globl	compat_sys_pwritev_wrapper
+compat_sys_pwritev_wrapper:
+	llgfr	%r2,%r2			# unsigned long
+	llgtr	%r3,%r3			# compat_iovec *
+	llgfr	%r4,%r4			# unsigned long
+	llgfr	%r5,%r5			# u32
+	llgfr	%r6,%r6			# u32
+	jg	compat_sys_pwritev	# branch to system call
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
@@ -34,8 +34,25 @@
 
 char kernel_nss_name[NSS_NAME_SIZE + 1];
 
+static unsigned long machine_flags;
+
 static void __init setup_boot_command_line(void);
 
+/*
+ * Get the TOD clock running.
+ */
+static void __init reset_tod_clock(void)
+{
+	u64 time;
+
+	if (store_clock(&time) == 0)
+		return;
+	/* TOD clock not running. Set the clock to Unix Epoch. */
+	if (set_clock(TOD_UNIX_EPOCH) != 0 || store_clock(&time) != 0)
+		disabled_wait(0);
+
+	sched_clock_base_cc = TOD_UNIX_EPOCH;
+}
 
 #ifdef CONFIG_SHARED_KERNEL
 int __init savesys_ipl_nss(char *cmd, const int cmdlen);
@@ -370,6 +387,7 @@ static void __init setup_boot_command_line(void)
  */
 void __init startup_init(void)
 {
+	reset_tod_clock();
 	ipl_save_parameters();
 	rescue_initrd();
 	clear_bss_section();
@@ -391,5 +409,6 @@ void __init startup_init(void)
 	setup_hpage();
 	sclp_facilities_detect();
 	detect_memory_layout(memory_chunk);
+	S390_lowcore.machine_flags = machine_flags;
 	lockdep_on();
 }
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
@@ -837,16 +837,29 @@ mcck_return:
 	__CPUINIT
 	.globl restart_int_handler
 restart_int_handler:
+	basr	%r1,0
+restart_base:
+	spt	restart_vtime-restart_base(%r1)
+	stck	__LC_LAST_UPDATE_CLOCK
+	mvc	__LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1)
+	mvc	__LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1)
 	l	%r15,__LC_SAVE_AREA+60	# load ksp
 	lctl	%c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
 	lam	%a0,%a15,__LC_AREGS_SAVE_AREA
 	lm	%r6,%r15,__SF_GPRS(%r15) # load registers from clone
+	l	%r1,__LC_THREAD_INFO
+	mvc	__LC_USER_TIMER(8),__TI_user_timer(%r1)
+	mvc	__LC_SYSTEM_TIMER(8),__TI_system_timer(%r1)
+	xc	__LC_STEAL_TIMER(8),__LC_STEAL_TIMER
 	stosm	__SF_EMPTY(%r15),0x04	# now we can turn dat on
 	basr	%r14,0
 	l	%r14,restart_addr-.(%r14)
 	br	%r14			# branch to start_secondary
 restart_addr:
 	.long	start_secondary
+	.align	8
+restart_vtime:
+	.long	0x7fffffff,0xffffffff
 	.previous
 #else
 /*

diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
@@ -831,14 +831,27 @@ mcck_return:
 	__CPUINIT
 	.globl restart_int_handler
 restart_int_handler:
+	basr	%r1,0
+restart_base:
+	spt	restart_vtime-restart_base(%r1)
+	stck	__LC_LAST_UPDATE_CLOCK
+	mvc	__LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1)
+	mvc	__LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1)
 	lg	%r15,__LC_SAVE_AREA+120 # load ksp
 	lghi	%r10,__LC_CREGS_SAVE_AREA
 	lctlg	%c0,%c15,0(%r10) # get new ctl regs
 	lghi	%r10,__LC_AREGS_SAVE_AREA
 	lam	%a0,%a15,0(%r10)
 	lmg	%r6,%r15,__SF_GPRS(%r15) # load registers from clone
+	lg	%r1,__LC_THREAD_INFO
+	mvc	__LC_USER_TIMER(8),__TI_user_timer(%r1)
+	mvc	__LC_SYSTEM_TIMER(8),__TI_system_timer(%r1)
+	xc	__LC_STEAL_TIMER(8),__LC_STEAL_TIMER
 	stosm	__SF_EMPTY(%r15),0x04	# now we can turn dat on
 	jg	start_secondary
+	.align	8
+restart_vtime:
+	.long	0x7fffffff,0xffffffff
 	.previous
 #else
 /*

diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
@@ -471,7 +471,12 @@ startup:basr	%r13,0			# get base
 .LPG0:
 	xc	0x200(256),0x200	# partially clear lowcore
 	xc	0x300(256),0x300
-
+	l	%r1,5f-.LPG0(%r13)
+	stck	0(%r1)
+	spt	6f-.LPG0(%r13)
+	mvc	__LC_LAST_UPDATE_CLOCK(8),0(%r1)
+	mvc	__LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
+	mvc	__LC_EXIT_TIMER(8),5f-.LPG0(%r13)
 #ifndef CONFIG_MARCH_G5
 	# check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
 	stidp	__LC_CPUID		# store cpuid
@@ -496,9 +501,13 @@ startup:basr	%r13,0			# get base
 	brct	%r0,0b
 #endif
 
-	l	%r13,0f-.LPG0(%r13)
+	l	%r13,4f-.LPG0(%r13)
 	b	0(%r13)
-0:	.long	startup_continue
+	.align	4
+4:	.long	startup_continue
+5:	.long	sched_clock_base_cc
+	.align	8
+6:	.long	0x7fffffff,0xffffffff
 
 #
 # params at 10400 (setup.h)