Merge branch 'x86-fixes-for-linus' of...

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  Revert "x86: default to reboot via ACPI"
  x86: align DirectMap in /proc/meminfo
  AMD IOMMU: fix lazy IO/TLB flushing in unmap path
  x86: add smp_mb() before sending INVALIDATE_TLB_VECTOR
  x86: remove VISWS and PARAVIRT around NR_IRQS puzzle
  x86: mention ACPI in top-level Kconfig menu
  x86: size NR_IRQS on 32-bit systems the same way as 64-bit
  x86: don't allow nr_irqs > NR_IRQS
  x86/docs: remove noirqbalance param docs
  x86: don't use tsc_khz to calculate lpj if notsc is passed
  x86, voyager: fix smp_intr_init() compile breakage
  AMD IOMMU: fix detection of NP capable IOMMUs

Documentation/kernel-parameters.txt

@@ -1472,8 +1472,6 @@ and is between 256 and 4096 characters. It is defined in the file
 			Valid arguments: on, off
 			Default: on
 
-	noirqbalance	[X86-32,SMP,KNL] Disable kernel irq balancing
-
 	noirqdebug	[X86-32] Disables the code which attempts to detect and
 			disable unhandled interrupt sources.
 

arch/x86/Kconfig

@@ -1494,7 +1494,7 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
 	def_bool X86_64
 	depends on NUMA
 
-menu "Power management options"
+menu "Power management and ACPI options"
 	depends on !X86_VOYAGER
 
 config ARCH_HIBERNATION_HEADER

arch/x86/include/asm/irq_vectors.h

@@ -101,30 +101,22 @@
 #define LAST_VM86_IRQ		15
 #define invalid_vm86_irq(irq)	((irq) < 3 || (irq) > 15)
 
-#ifdef CONFIG_X86_64
+#if defined(CONFIG_X86_IO_APIC) && !defined(CONFIG_X86_VOYAGER)
 # if NR_CPUS < MAX_IO_APICS
 #  define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
 # else
 #  define NR_IRQS (NR_VECTORS + (32 * MAX_IO_APICS))
 # endif
 
-#elif !defined(CONFIG_X86_VOYAGER)
-
-# if defined(CONFIG_X86_IO_APIC) || defined(CONFIG_PARAVIRT) || defined(CONFIG_X86_VISWS)
+#elif defined(CONFIG_X86_VOYAGER)
 
 # define NR_IRQS		224
 
-# else /* IO_APIC || PARAVIRT */
+#else /* IO_APIC || VOYAGER */
 
 # define NR_IRQS		16
 
-# endif
-
-#else /* !VISWS && !VOYAGER */
-
-# define NR_IRQS		224
-
-#endif /* VISWS */
+#endif
 
 /* Voyager specific defines */
 /* These define the CPIs we use in linux */

arch/x86/include/asm/voyager.h

@@ -520,6 +520,7 @@ extern void voyager_restart(void);
 extern void voyager_cat_power_off(void);
 extern void voyager_cat_do_common_interrupt(void);
 extern void voyager_handle_nmi(void);
+extern void voyager_smp_intr_init(void);
 /* Commands for the following are */
 #define	VOYAGER_PSI_READ	0
 #define VOYAGER_PSI_WRITE	1

arch/x86/kernel/amd_iommu.c

@@ -50,7 +50,7 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
 /* returns !0 if the IOMMU is caching non-present entries in its TLB */
 static int iommu_has_npcache(struct amd_iommu *iommu)
 {
-	return iommu->cap & IOMMU_CAP_NPCACHE;
+	return iommu->cap & (1UL << IOMMU_CAP_NPCACHE);
 }
 
 /****************************************************************************
@@ -536,6 +536,9 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
 {
 	address >>= PAGE_SHIFT;
 	iommu_area_free(dom->bitmap, address, pages);
+
+	if (address + pages >= dom->next_bit)
+		dom->need_flush = true;
 }
 
 /****************************************************************************
@@ -992,8 +995,10 @@ static void __unmap_single(struct amd_iommu *iommu,
 
 	dma_ops_free_addresses(dma_dom, dma_addr, pages);
 
-	if (amd_iommu_unmap_flush)
+	if (amd_iommu_unmap_flush || dma_dom->need_flush) {
 		iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);
+		dma_dom->need_flush = false;
+	}
 }
 
 /*

arch/x86/kernel/io_apic.c

@@ -3611,6 +3611,8 @@ int __init probe_nr_irqs(void)
 	/* something wrong ? */
 	if (nr < nr_min)
 		nr = nr_min;
+	if (WARN_ON(nr > NR_IRQS))
+		nr = NR_IRQS;
 
 	return nr;
 }

arch/x86/kernel/reboot.c

@@ -29,11 +29,7 @@ EXPORT_SYMBOL(pm_power_off);
 
 static const struct desc_ptr no_idt = {};
 static int reboot_mode;
-/*
- * Keyboard reset and triple fault may result in INIT, not RESET, which
- * doesn't work when we're in vmx root mode.  Try ACPI first.
- */
-enum reboot_type reboot_type = BOOT_ACPI;
+enum reboot_type reboot_type = BOOT_KBD;
 int reboot_force;
 
 #if defined(CONFIG_X86_32) && defined(CONFIG_SMP)

arch/x86/kernel/tlb_32.c

@@ -154,6 +154,12 @@ void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
 	flush_mm = mm;
 	flush_va = va;
 	cpus_or(flush_cpumask, cpumask, flush_cpumask);
+
+	/*
+	 * Make the above memory operations globally visible before
+	 * sending the IPI.
+	 */
+	smp_mb();
 	/*
 	 * We have to send the IPI only to
 	 * CPUs affected.

arch/x86/kernel/tlb_64.c

@@ -182,6 +182,11 @@ void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
 	f->flush_va = va;
 	cpus_or(f->flush_cpumask, cpumask, f->flush_cpumask);
 
+	/*
+	 * Make the above memory operations globally visible before
+	 * sending the IPI.
+	 */
+	smp_mb();
 	/*
 	 * We have to send the IPI only to
 	 * CPUs affected.

arch/x86/kernel/tsc.c

@@ -813,10 +813,6 @@ void __init tsc_init(void)
 		cpu_khz = calibrate_cpu();
 #endif
 
-	lpj = ((u64)tsc_khz * 1000);
-	do_div(lpj, HZ);
-	lpj_fine = lpj;
-
 	printk("Detected %lu.%03lu MHz processor.\n",
 			(unsigned long)cpu_khz / 1000,
 			(unsigned long)cpu_khz % 1000);
@@ -836,6 +832,10 @@ void __init tsc_init(void)
 	/* now allow native_sched_clock() to use rdtsc */
 	tsc_disabled = 0;
 
+	lpj = ((u64)tsc_khz * 1000);
+	do_div(lpj, HZ);
+	lpj_fine = lpj;
+
 	use_tsc_delay();
 	/* Check and install the TSC clocksource */
 	dmi_check_system(bad_tsc_dmi_table);

arch/x86/mach-voyager/setup.c

@@ -27,7 +27,7 @@ static struct irqaction irq2 = {
 void __init intr_init_hook(void)
 {
 #ifdef CONFIG_SMP
-	smp_intr_init();
+	voyager_smp_intr_init();
 #endif
 
 	setup_irq(2, &irq2);

arch/x86/mach-voyager/voyager_smp.c

@@ -1258,7 +1258,7 @@ static void handle_vic_irq(unsigned int irq, struct irq_desc *desc)
 #define QIC_SET_GATE(cpi, vector) \
 	set_intr_gate((cpi) + QIC_DEFAULT_CPI_BASE, (vector))
 
-void __init smp_intr_init(void)
+void __init voyager_smp_intr_init(void)
 {
 	int i;