Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh-latest

6 files changed, 60 insertions, 79 deletions

diff --git a/arch/powerpc/platforms/iseries/Kconfig b/arch/powerpc/platforms/iseries/Kconfig
index e5bc9f75d47..b57cda3a081 100644
--- a/arch/powerpc/platforms/iseries/Kconfig
+++ b/arch/powerpc/platforms/iseries/Kconfig
@@ -1,7 +1,9 @@
 config PPC_ISERIES
 	bool "IBM Legacy iSeries"
 	depends on PPC64 && PPC_BOOK3S
-	select PPC_INDIRECT_IO
+	select PPC_SMP_MUXED_IPI
+	select PPC_INDIRECT_PIO
+	select PPC_INDIRECT_MMIO
 	select PPC_PCI_CHOICE if EXPERT
 
 menu "iSeries device drivers"
diff --git a/arch/powerpc/platforms/iseries/exception.S b/arch/powerpc/platforms/iseries/exception.S
index 32a56c6dfa7..29c02f36b32 100644
--- a/arch/powerpc/platforms/iseries/exception.S
+++ b/arch/powerpc/platforms/iseries/exception.S
@@ -31,6 +31,7 @@
 #include <asm/thread_info.h>
 #include <asm/ptrace.h>
 #include <asm/cputable.h>
+#include <asm/mmu.h>
 
 #include "exception.h"
 
@@ -60,29 +61,31 @@ system_reset_iSeries:
 /* Spin on __secondary_hold_spinloop until it is updated by the boot cpu. */
 /* In the UP case we'll yield() later, and we will not access the paca anyway */
 #ifdef CONFIG_SMP
-1:
+iSeries_secondary_wait_paca:
 	HMT_LOW
 	LOAD_REG_ADDR(r23, __secondary_hold_spinloop)
 	ld	r23,0(r23)
-	sync
-	LOAD_REG_ADDR(r3,current_set)
-	sldi	r28,r24,3		/* get current_set[cpu#] */
-	ldx	r3,r3,r28
-	addi	r1,r3,THREAD_SIZE
-	subi	r1,r1,STACK_FRAME_OVERHEAD
 
-	cmpwi	0,r23,0			/* Keep poking the Hypervisor until */
-	bne	2f			/* we're released */
-	/* Let the Hypervisor know we are alive */
+	cmpdi	0,r23,0
+	bne	2f			/* go on when the master is ready */
+
+	/* Keep poking the Hypervisor until we're released */
 	/* 8002 is a call to HvCallCfg::getLps, a harmless Hypervisor function */
 	lis	r3,0x8002
 	rldicr	r3,r3,32,15		/* r0 = (r3 << 32) & 0xffff000000000000 */
 	li	r0,-1			/* r0=-1 indicates a Hypervisor call */
 	sc				/* Invoke the hypervisor via a system call */
-	b	1b
-#endif
+	b	iSeries_secondary_wait_paca
 
 2:
+	HMT_MEDIUM
+	sync
+
+	LOAD_REG_ADDR(r3, nr_cpu_ids)	/* get number of pacas allocated */
+	lwz	r3,0(r3)		/* nr_cpus= or NR_CPUS can limit */
+	cmpld	0,r24,r3		/* is our cpu number allocated? */
+	bge	iSeries_secondary_yield	/* no, yield forever */
+
 	/* Load our paca now that it's been allocated */
 	LOAD_REG_ADDR(r13, paca)
 	ld	r13,0(r13)
@@ -93,10 +96,24 @@ system_reset_iSeries:
 	ori	r23,r23,MSR_RI
 	mtmsrd	r23			/* RI on */
 
-	HMT_LOW
-#ifdef CONFIG_SMP
+iSeries_secondary_smp_loop:
 	lbz	r23,PACAPROCSTART(r13)	/* Test if this processor
 					 * should start */
+	cmpwi	0,r23,0
+	bne	3f			/* go on when we are told */
+
+	HMT_LOW
+	/* Let the Hypervisor know we are alive */
+	/* 8002 is a call to HvCallCfg::getLps, a harmless Hypervisor function */
+	lis	r3,0x8002
+	rldicr	r3,r3,32,15		/* r0 = (r3 << 32) & 0xffff000000000000 */
+	li	r0,-1			/* r0=-1 indicates a Hypervisor call */
+	sc				/* Invoke the hypervisor via a system call */
+	mfspr	r13,SPRN_SPRG_PACA	/* Put r13 back ???? */
+	b	iSeries_secondary_smp_loop /* wait for signal to start */
+
+3:
+	HMT_MEDIUM
 	sync
 	LOAD_REG_ADDR(r3,current_set)
 	sldi	r28,r24,3		/* get current_set[cpu#] */
@@ -104,27 +121,22 @@ system_reset_iSeries:
 	addi	r1,r3,THREAD_SIZE
 	subi	r1,r1,STACK_FRAME_OVERHEAD
 
-	cmpwi	0,r23,0
-	beq	iSeries_secondary_smp_loop	/* Loop until told to go */
 	b	__secondary_start		/* Loop until told to go */
-iSeries_secondary_smp_loop:
-	/* Let the Hypervisor know we are alive */
-	/* 8002 is a call to HvCallCfg::getLps, a harmless Hypervisor function */
-	lis	r3,0x8002
-	rldicr	r3,r3,32,15		/* r0 = (r3 << 32) & 0xffff000000000000 */
-#else /* CONFIG_SMP */
+#endif /* CONFIG_SMP */
+
+iSeries_secondary_yield:
 	/* Yield the processor.  This is required for non-SMP kernels
 		which are running on multi-threaded machines. */
+	HMT_LOW
 	lis	r3,0x8000
 	rldicr	r3,r3,32,15		/* r3 = (r3 << 32) & 0xffff000000000000 */
 	addi	r3,r3,18		/* r3 = 0x8000000000000012 which is "yield" */
 	li	r4,0			/* "yield timed" */
 	li	r5,-1			/* "yield forever" */
-#endif /* CONFIG_SMP */
 	li	r0,-1			/* r0=-1 indicates a Hypervisor call */
 	sc				/* Invoke the hypervisor via a system call */
 	mfspr	r13,SPRN_SPRG_PACA	/* Put r13 back ???? */
-	b	2b			/* If SMP not configured, secondaries
+	b	iSeries_secondary_yield	/* If SMP not configured, secondaries
 					 * loop forever */
 
 /***  ISeries-LPAR interrupt handlers ***/
@@ -157,7 +169,7 @@ BEGIN_FTR_SECTION
 FTR_SECTION_ELSE
 	EXCEPTION_PROLOG_1(PACA_EXGEN)
 	EXCEPTION_PROLOG_ISERIES_1
-ALT_FTR_SECTION_END_IFCLR(CPU_FTR_SLB)
+ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_SLB)
 	b	data_access_common
 
 .do_stab_bolted_iSeries:
diff --git a/arch/powerpc/platforms/iseries/irq.c b/arch/powerpc/platforms/iseries/irq.c
index 52a6889832c..b2103453eb0 100644
--- a/arch/powerpc/platforms/iseries/irq.c
+++ b/arch/powerpc/platforms/iseries/irq.c
@@ -42,7 +42,6 @@
 #include "irq.h"
 #include "pci.h"
 #include "call_pci.h"
-#include "smp.h"
 
 #ifdef CONFIG_PCI
 
@@ -171,7 +170,7 @@ static void iseries_enable_IRQ(struct irq_data *d)
 {
 	u32 bus, dev_id, function, mask;
 	const u32 sub_bus = 0;
-	unsigned int rirq = (unsigned int)irq_map[d->irq].hwirq;
+	unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
 
 	/* The IRQ has already been locked by the caller */
 	bus = REAL_IRQ_TO_BUS(rirq);
@@ -188,7 +187,7 @@ static unsigned int iseries_startup_IRQ(struct irq_data *d)
 {
 	u32 bus, dev_id, function, mask;
 	const u32 sub_bus = 0;
-	unsigned int rirq = (unsigned int)irq_map[d->irq].hwirq;
+	unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
 
 	bus = REAL_IRQ_TO_BUS(rirq);
 	function = REAL_IRQ_TO_FUNC(rirq);
@@ -234,7 +233,7 @@ static void iseries_shutdown_IRQ(struct irq_data *d)
 {
 	u32 bus, dev_id, function, mask;
 	const u32 sub_bus = 0;
-	unsigned int rirq = (unsigned int)irq_map[d->irq].hwirq;
+	unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
 
 	/* irq should be locked by the caller */
 	bus = REAL_IRQ_TO_BUS(rirq);
@@ -257,7 +256,7 @@ static void iseries_disable_IRQ(struct irq_data *d)
 {
 	u32 bus, dev_id, function, mask;
 	const u32 sub_bus = 0;
-	unsigned int rirq = (unsigned int)irq_map[d->irq].hwirq;
+	unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
 
 	/* The IRQ has already been locked by the caller */
 	bus = REAL_IRQ_TO_BUS(rirq);
@@ -271,7 +270,7 @@ static void iseries_disable_IRQ(struct irq_data *d)
 
 static void iseries_end_IRQ(struct irq_data *d)
 {
-	unsigned int rirq = (unsigned int)irq_map[d->irq].hwirq;
+	unsigned int rirq = (unsigned int)irqd_to_hwirq(d);
 
 	HvCallPci_eoi(REAL_IRQ_TO_BUS(rirq), REAL_IRQ_TO_SUBBUS(rirq),
 		(REAL_IRQ_TO_IDSEL(rirq) << 4) + REAL_IRQ_TO_FUNC(rirq));
@@ -316,7 +315,7 @@ unsigned int iSeries_get_irq(void)
 #ifdef CONFIG_SMP
 	if (get_lppaca()->int_dword.fields.ipi_cnt) {
 		get_lppaca()->int_dword.fields.ipi_cnt = 0;
-		iSeries_smp_message_recv();
+		smp_ipi_demux();
 	}
 #endif /* CONFIG_SMP */
 	if (hvlpevent_is_pending())
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index 2946ae10fbf..c25a0815c26 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -249,7 +249,7 @@ static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
 	unsigned long i;
 	unsigned long mem_blocks = 0;
 
-	if (cpu_has_feature(CPU_FTR_SLB))
+	if (mmu_has_feature(MMU_FTR_SLB))
 		mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
 				max_entries);
 	else
@@ -634,7 +634,7 @@ static int __init iseries_probe(void)
 
 	hpte_init_iSeries();
 	/* iSeries does not support 16M pages */
-	cur_cpu_spec->cpu_features &= ~CPU_FTR_16M_PAGE;
+	cur_cpu_spec->mmu_features &= ~MMU_FTR_16M_PAGE;
 
 	return 1;
 }
@@ -685,6 +685,11 @@ void * __init iSeries_early_setup(void)
 	powerpc_firmware_features |= FW_FEATURE_ISERIES;
 	powerpc_firmware_features |= FW_FEATURE_LPAR;
 
+#ifdef CONFIG_SMP
+	/* On iSeries we know we can never have more than 64 cpus */
+	nr_cpu_ids = max(nr_cpu_ids, 64);
+#endif
+
 	iSeries_fixup_klimit();
 
 	/*
diff --git a/arch/powerpc/platforms/iseries/smp.c b/arch/powerpc/platforms/iseries/smp.c
index 6c6029914db..e3265adde5d 100644
--- a/arch/powerpc/platforms/iseries/smp.c
+++ b/arch/powerpc/platforms/iseries/smp.c
@@ -42,57 +42,23 @@
 #include <asm/cputable.h>
 #include <asm/system.h>
 
-#include "smp.h"
-
-static unsigned long iSeries_smp_message[NR_CPUS];
-
-void iSeries_smp_message_recv(void)
-{
-	int cpu = smp_processor_id();
-	int msg;
-
-	if (num_online_cpus() < 2)
-		return;
-
-	for (msg = 0; msg < 4; msg++)
-		if (test_and_clear_bit(msg, &iSeries_smp_message[cpu]))
-			smp_message_recv(msg);
-}
-
-static inline void smp_iSeries_do_message(int cpu, int msg)
+static void smp_iSeries_cause_ipi(int cpu, unsigned long data)
 {
-	set_bit(msg, &iSeries_smp_message[cpu]);
 	HvCall_sendIPI(&(paca[cpu]));
 }
 
-static void smp_iSeries_message_pass(int target, int msg)
-{
-	int i;
-
-	if (target < NR_CPUS)
-		smp_iSeries_do_message(target, msg);
-	else {
-		for_each_online_cpu(i) {
-			if ((target == MSG_ALL_BUT_SELF) &&
-					(i == smp_processor_id()))
-				continue;
-			smp_iSeries_do_message(i, msg);
-		}
-	}
-}
-
 static int smp_iSeries_probe(void)
 {
 	return cpumask_weight(cpu_possible_mask);
 }
 
-static void smp_iSeries_kick_cpu(int nr)
+static int smp_iSeries_kick_cpu(int nr)
 {
 	BUG_ON((nr < 0) || (nr >= NR_CPUS));
 
 	/* Verify that our partition has a processor nr */
 	if (lppaca_of(nr).dyn_proc_status >= 2)
-		return;
+		return -ENOENT;
 
 	/* The processor is currently spinning, waiting
 	 * for the cpu_start field to become non-zero
@@ -100,6 +66,8 @@ static void smp_iSeries_kick_cpu(int nr)
 	 * continue on to secondary_start in iSeries_head.S
 	 */
 	paca[nr].cpu_start = 1;
+
+	return 0;
 }
 
 static void __devinit smp_iSeries_setup_cpu(int nr)
@@ -107,7 +75,8 @@ static void __devinit smp_iSeries_setup_cpu(int nr)
 }
 
 static struct smp_ops_t iSeries_smp_ops = {
-	.message_pass = smp_iSeries_message_pass,
+	.message_pass = smp_muxed_ipi_message_pass,
+	.cause_ipi    = smp_iSeries_cause_ipi,
 	.probe        = smp_iSeries_probe,
 	.kick_cpu     = smp_iSeries_kick_cpu,
 	.setup_cpu    = smp_iSeries_setup_cpu,
diff --git a/arch/powerpc/platforms/iseries/smp.h b/arch/powerpc/platforms/iseries/smp.h
deleted file mode 100644
index d501f7de01e..00000000000
--- a/arch/powerpc/platforms/iseries/smp.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _PLATFORMS_ISERIES_SMP_H
-#define _PLATFORMS_ISERIES_SMP_H
-
-extern void iSeries_smp_message_recv(void);
-
-#endif	/* _PLATFORMS_ISERIES_SMP_H */