X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fmm%2Fmmio-mod.c;h=e7397e108beb2d55c192eee9413a28468ac66fb6;hb=6d889724332e875ac07b6c88e08d9564c180824d;hp=ab2bb776d3105cbf4537c9b5ad74a28f06aef8d8;hpb=e4b37ee68609037ffcaa2fcfae47cd31a605bb9e;p=linux-2.6-omap-h63xx.git

diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index ab2bb776d31..e7397e108be 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -24,7 +24,7 @@
 #include <linux/module.h>
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <linux/version.h>
 #include <linux/kallsyms.h>
 #include <asm/pgtable.h>
@@ -32,6 +32,7 @@
 #include <asm/e820.h> /* for ISA_START_ADDRESS */
 #include <asm/atomic.h>
 #include <linux/percpu.h>
+#include <linux/cpu.h>
 
 #include "pf_in.h"
 
@@ -47,7 +48,7 @@ struct trap_reason {
 struct remap_trace {
 	struct list_head list;
 	struct kmmio_probe probe;
-	unsigned long phys;
+	resource_size_t phys;
 	unsigned long id;
 };
 
@@ -136,7 +137,7 @@ static ssize_t write_marker(struct file *file, const char __user *buffer,
 
 static void print_pte(unsigned long address)
 {
-	int level;
+	unsigned int level;
 	pte_t *pte = lookup_address(address, &level);
 
 	if (!pte) {
@@ -150,8 +151,9 @@ static void print_pte(unsigned long address)
 							"0x%08lx\n", address);
 		BUG();
 	}
-	pr_info(NAME "pte for 0x%lx: 0x%lx 0x%lx\n", address, pte_val(*pte),
-						pte_val(*pte) & _PAGE_PRESENT);
+	pr_info(NAME "pte for 0x%lx: 0x%llx 0x%llx\n", address,
+		(unsigned long long)pte_val(*pte),
+		(unsigned long long)pte_val(*pte) & _PAGE_PRESENT);
 }
 
 /*
@@ -189,7 +191,7 @@ static void pre(struct kmmio_probe *p, struct pt_regs *regs,
 	struct mmiotrace_rw *my_trace = &get_cpu_var(cpu_trace);
 	const unsigned long instptr = instruction_pointer(regs);
 	const enum reason_type type = get_ins_type(instptr);
-	struct remap_trace *trace = p->user_data;
+	struct remap_trace *trace = p->private;
 
 	/* it doesn't make sense to have more than one active trace per cpu */
 	if (my_reason->active_traces)
@@ -273,11 +275,12 @@ static void post(struct kmmio_probe *p, unsigned long condition,
 	put_cpu_var(pf_reason);
 }
 
-static void ioremap_trace_core(unsigned long offset, unsigned long size,
+static void ioremap_trace_core(resource_size_t offset, unsigned long size,
 							void __iomem *addr)
 {
 	static atomic_t next_id;
 	struct remap_trace *trace = kmalloc(sizeof(*trace), GFP_KERNEL);
+	/* These are page-unaligned. */
 	struct mmiotrace_map map = {
 		.phys = offset,
 		.virt = (unsigned long)addr,
@@ -296,7 +299,7 @@ static void ioremap_trace_core(unsigned long offset, unsigned long size,
 			.len = size,
 			.pre_handler = pre,
 			.post_handler = post,
-			.user_data = trace
+			.private = trace
 		},
 		.phys = offset,
 		.id = atomic_inc_return(&next_id)
@@ -316,13 +319,14 @@ not_enabled:
 	spin_unlock_irq(&trace_lock);
 }
 
-void
-mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr)
+void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
+						void __iomem *addr)
 {
 	if (!is_enabled()) /* recheck and proper locking in *_core() */
 		return;
 
-	pr_debug(NAME "ioremap_*(0x%lx, 0x%lx) = %p\n", offset, size, addr);
+	pr_debug(NAME "ioremap_*(0x%llx, 0x%lx) = %p\n",
+				(unsigned long long)offset, size, addr);
 	if ((filter_offset) && (offset != filter_offset))
 		return;
 	ioremap_trace_core(offset, size, addr);
@@ -399,6 +403,63 @@ static void clear_trace_list(void)
 	}
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+static cpumask_t downed_cpus;
+
+static void enter_uniprocessor(void)
+{
+	int cpu;
+	int err;
+
+	get_online_cpus();
+	downed_cpus = cpu_online_map;
+	cpu_clear(first_cpu(cpu_online_map), downed_cpus);
+	if (num_online_cpus() > 1)
+		pr_notice(NAME "Disabling non-boot CPUs...\n");
+	put_online_cpus();
+
+	for_each_cpu_mask(cpu, downed_cpus) {
+		err = cpu_down(cpu);
+		if (!err)
+			pr_info(NAME "CPU%d is down.\n", cpu);
+		else
+			pr_err(NAME "Error taking CPU%d down: %d\n", cpu, err);
+	}
+	if (num_online_cpus() > 1)
+		pr_warning(NAME "multiple CPUs still online, "
+						"may miss events.\n");
+}
+
+static void leave_uniprocessor(void)
+{
+	int cpu;
+	int err;
+
+	if (cpus_weight(downed_cpus) == 0)
+		return;
+	pr_notice(NAME "Re-enabling CPUs...\n");
+	for_each_cpu_mask(cpu, downed_cpus) {
+		err = cpu_up(cpu);
+		if (!err)
+			pr_info(NAME "enabled CPU%d.\n", cpu);
+		else
+			pr_err(NAME "cannot re-enable CPU%d: %d\n", cpu, err);
+	}
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+static void enter_uniprocessor(void)
+{
+	if (num_online_cpus() > 1)
+		pr_warning(NAME "multiple CPUs are online, may miss events. "
+			"Suggest booting with maxcpus=1 kernel argument.\n");
+}
+
+static void leave_uniprocessor(void)
+{
+}
+#endif
+
 #if 0 /* XXX: out of order */
 static struct file_operations fops_marker = {
 	.owner =	THIS_MODULE,
@@ -421,6 +482,7 @@ void enable_mmiotrace(void)
 
 	if (nommiotrace)
 		pr_info(NAME "MMIO tracing disabled.\n");
+	enter_uniprocessor();
 	spin_lock_irq(&trace_lock);
 	atomic_inc(&mmiotrace_enabled);
 	spin_unlock_irq(&trace_lock);
@@ -441,6 +503,7 @@ void disable_mmiotrace(void)
 	spin_unlock_irq(&trace_lock);
 
 	clear_trace_list(); /* guarantees: no more kmmio callbacks */
+	leave_uniprocessor();
 	if (marker_file) {
 		debugfs_remove(marker_file);
 		marker_file = NULL;