[PATCH 0/5] loglevel=pci:7,acpi:6 support v3

[PATCH 0/5] loglevel=pci:7,acpi:6 support v3

[Yinghai Lu]

usage:
	in .h to have
		#define KERN_PCI "<pci>"
	in .c to have
		DEFINE_LOGLEVEL_SETUP(pci, KERN_PCI, "pci:");
	then could use
		printk(KERN_DEBUG KERN_PCI fmt, ...);
	and command line
		loglevel=pci:8

you can add different printk to different files of one subsys if you like
not just one susbsys one tag, and don't need to update kernel.h to add more tags

YH

[PATCH 1/5] add DEFINE_LOGLEVEL_SETUP v4

[Yinghai Lu]

so could make subsys easy to add loglevel and xxx_printk
v2: make it more genric, so subsys user only need to two line macro
v3: add back nameStr, so could find out iommu: and iommu_gart: and etc
v4: use printk intead of pci_printk

usage:
	in .h to have
		#define KERN_PCI "<pci>"
	in .c to have
		DEFINE_LOGLEVEL_SETUP(pci, KERN_PCI, "pci:");
	then could use
		printk(KERN_DEBUG KERN_PCI fmt, ...);
	and command line
		loglevel=pci:8

you can add different printk to different files of one subsys if you like

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
---
 arch/x86/kernel/vmlinux_32.lds.S  |    1 
 arch/x86/kernel/vmlinux_64.lds.S  |    2 +
 include/asm-generic/vmlinux.lds.h |    8 ++++
 include/linux/init.h              |   17 ++++++++
 include/linux/kernel.h            |    9 ++++
 init/main.c                       |   74 +++++++++++++++++++++++++++++++++++++-
 kernel/printk.c                   |   27 +++++++++++--
 7 files changed, 133 insertions(+), 5 deletions(-)

Index: linux-2.6/arch/x86/kernel/vmlinux_32.lds.S
===================================================================
--- linux-2.6.orig/arch/x86/kernel/vmlinux_32.lds.S
+++ linux-2.6/arch/x86/kernel/vmlinux_32.lds.S
@@ -145,6 +145,7 @@ SECTIONS
 	*(.x86_cpu_dev.init)
 	__x86_cpu_dev_end = .;
   }
+  LOGLEVEL_SETUP_INIT(8)
   DYN_ARRAY_INIT(8)
   SECURITY_INIT
   . = ALIGN(4);
Index: linux-2.6/arch/x86/kernel/vmlinux_64.lds.S
===================================================================
--- linux-2.6.orig/arch/x86/kernel/vmlinux_64.lds.S
+++ linux-2.6/arch/x86/kernel/vmlinux_64.lds.S
@@ -174,6 +174,8 @@ SECTIONS
   }
   __x86_cpu_dev_end = .;
 
+  LOGLEVEL_SETUP_INIT(8)
+
   DYN_ARRAY_INIT(8)
 
   SECURITY_INIT
Index: linux-2.6/include/asm-generic/vmlinux.lds.h
===================================================================
--- linux-2.6.orig/include/asm-generic/vmlinux.lds.h
+++ linux-2.6/include/asm-generic/vmlinux.lds.h
@@ -222,6 +222,14 @@
  * All archs are supposed to use RO_DATA() */
 #define RODATA RO_DATA(4096)
 
+#define LOGLEVEL_SETUP_INIT(align)					\
+	. = ALIGN((align));						\
+	.loglevel_setup.init : AT(ADDR(.loglevel_setup.init) - LOAD_OFFSET) {	\
+		VMLINUX_SYMBOL(__loglevel_setup_start) = .;		\
+		*(.loglevel_setup.init)					\
+		VMLINUX_SYMBOL(__loglevel_setup_end) = .;		\
+	}
+
 #define DYN_ARRAY_INIT(align)							\
 	. = ALIGN((align));						\
 	.dyn_array.init : AT(ADDR(.dyn_array.init) - LOAD_OFFSET) {	\
Index: linux-2.6/include/linux/init.h
===================================================================
--- linux-2.6.orig/include/linux/init.h
+++ linux-2.6/include/linux/init.h
@@ -251,6 +251,23 @@ struct obs_kernel_param {
 /* Relies on boot_command_line being set */
 void __init parse_early_param(void);
 
+struct loglevel_setup {
+	char *name;
+	char *tag;
+};
+
+extern struct loglevel_setup *__loglevel_setup_start[], *__loglevel_setup_end[];
+
+#define DEFINE_LOGLEVEL_SETUP(nameX, tagX, nameStr)				\
+	static struct loglevel_setup __loglevel_setup_##nameX __initdata = \
+	{							\
+		.tag = tagX,				\
+		.name = nameStr,				\
+	};							\
+	static struct loglevel_setup *__loglevel_setup_ptr_##nameX __used \
+	__attribute__((__section__(".loglevel_setup.init"))) =	\
+		&__loglevel_setup_##nameX
+
 struct dyn_array {
 	void **name;
 	unsigned long size;
Index: linux-2.6/include/linux/kernel.h
===================================================================
--- linux-2.6.orig/include/linux/kernel.h
+++ linux-2.6/include/linux/kernel.h
@@ -104,6 +104,15 @@ extern int console_printk[];
 #define minimum_console_loglevel (console_printk[2])
 #define default_console_loglevel (console_printk[3])
 
+struct tag_console_loglevel {
+	char tag[32];
+	char name[32];
+	int level;
+};
+
+extern struct tag_console_loglevel tag_level[];
+extern int tag_level_nr;
+
 struct completion;
 struct pt_regs;
 struct user;
Index: linux-2.6/init/main.c
===================================================================
--- linux-2.6.orig/init/main.c
+++ linux-2.6/init/main.c
@@ -248,9 +248,81 @@ static int __init quiet_kernel(char *str
 early_param("debug", debug_kernel);
 early_param("quiet", quiet_kernel);
 
+struct tag_console_loglevel tag_level[32];
+int tag_level_nr;
+
+static int __init save_tag_name_level(const char *tag, const char *name, int level)
+{
+	int len;
+
+	if (tag_level_nr > 32)
+		return -1;
+
+	len = sizeof(tag_level[tag_level_nr].tag);
+	strncpy(tag_level[tag_level_nr].tag, tag, len - 1);
+	len = sizeof(tag_level[tag_level_nr].name);
+	strncpy(tag_level[tag_level_nr].name, name, len - 1);
+	tag_level[tag_level_nr].level = level;
+
+	tag_level_nr++;
+
+	return 0;
+}
+
+static void __init tag_name_level_setup(void)
+{
+	struct loglevel_setup **la;
+	int level = default_console_loglevel;
+
+	if (level != console_loglevel)
+		level = console_loglevel;
+
+	for (la = __loglevel_setup_start ; la < __loglevel_setup_end; la++) {
+		struct loglevel_setup *l = *la;
+
+
+		save_tag_name_level(l->tag, l->name, level);
+	}
+
+}
+
+static char __init *real_loglevel_setup(char *str)
+{
+	int i;
+
+	for (i = 0; i < tag_level_nr; i++) {
+		struct tag_console_loglevel *tl;
+		int len;
+
+		tl = &tag_level[i];
+		len = strlen(tl->name);
+		if (!strncmp(str, tl->name, len)) {
+			int level;
+
+			str += len;
+			get_option(&str, &level);
+			tl->level = level;
+			str = NULL;
+			break;
+		}
+	}
+
+	return str;
+}
+
 static int __init loglevel(char *str)
 {
-	get_option(&str, &console_loglevel);
+	tag_name_level_setup();
+
+	while (str) {
+		char *k = strchr(str, ',');
+		if (k)
+			*k++ = 0;
+		if (*str && (str = real_loglevel_setup(str)) && *str) {
+			get_option(&str, &console_loglevel);
+		}
+		str = k;
+	}
 	return 0;
 }
 
Index: linux-2.6/kernel/printk.c
===================================================================
--- linux-2.6.orig/kernel/printk.c
+++ linux-2.6/kernel/printk.c
@@ -457,9 +457,9 @@ early_param("ignore_loglevel", ignore_lo
  * Write out chars from start to end - 1 inclusive
  */
 static void _call_console_drivers(unsigned start,
-				unsigned end, int msg_log_level)
+				unsigned end, int msg_log_level, int level)
 {
-	if ((msg_log_level < console_loglevel || ignore_loglevel) &&
+	if ((msg_log_level < level || ignore_loglevel) &&
 			console_drivers && start != end) {
 		if ((start & LOG_BUF_MASK) > (end & LOG_BUF_MASK)) {
 			/* wrapped write */
@@ -481,21 +481,40 @@ static void call_console_drivers(unsigne
 {
 	unsigned cur_index, start_print;
 	static int msg_level = -1;
+	int level = console_loglevel;
 
 	BUG_ON(((int)(start - end)) > 0);
 
 	cur_index = start;
 	start_print = start;
 	while (cur_index != end) {
+		int i;
+
 		if (msg_level < 0 && ((end - cur_index) > 2) &&
 				LOG_BUF(cur_index + 0) == '<' &&
 				LOG_BUF(cur_index + 1) >= '0' &&
 				LOG_BUF(cur_index + 1) <= '7' &&
 				LOG_BUF(cur_index + 2) == '>') {
 			msg_level = LOG_BUF(cur_index + 1) - '0';
+			level = console_loglevel;
 			cur_index += 3;
 			start_print = cur_index;
 		}
+		/* handle tag here */
+		for (i = 0; i < tag_level_nr; i++) {
+			struct tag_console_loglevel *tl = NULL;
+			int len;
+
+			tl = &tag_level[i];
+			len = strlen(tl->tag);
+			if ((end - cur_index) > (len - 1) &&
+			    !strncmp(&LOG_BUF(cur_index), tl->tag, len)) {
+				level = tl->level;
+				cur_index += len;
+				start_print = cur_index;
+				break;
+			}
+		}
 		while (cur_index != end) {
 			char c = LOG_BUF(cur_index);
 
@@ -510,14 +529,14 @@ static void call_console_drivers(unsigne
 					 */
 					msg_level = default_message_loglevel;
 				}
-				_call_console_drivers(start_print, cur_index, msg_level);
+				_call_console_drivers(start_print, cur_index, msg_level, level);
 				msg_level = -1;
 				start_print = cur_index;
 				break;
 			}
 		}
 	}
-	_call_console_drivers(start_print, end, msg_level);
+	_call_console_drivers(start_print, end, msg_level, level);
 }
 
 static void emit_log_char(char c)

[PATCH 2/5] pci: add pci_printk v4

[Yinghai Lu]

use DEFINE_LOGLEVEL_SETUP to set loglevel for pci
v2: two lines only
v3: use <pci, "pci:"> instead
v4: use KERN_PCI

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
---
 drivers/pci/pci.c   |    2 ++
 include/linux/pci.h |    2 ++
 2 files changed, 4 insertions(+)

Index: linux-2.6/drivers/pci/pci.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci.c
+++ linux-2.6/drivers/pci/pci.c
@@ -1953,6 +1953,8 @@ static int __devinit pci_setup(char *str
 }
 early_param("pci", pci_setup);
 
+DEFINE_LOGLEVEL_SETUP(pci, KERN_PCI, "pci:");
+
 device_initcall_sync(pci_init);
 
 EXPORT_SYMBOL(pci_reenable_device);
Index: linux-2.6/include/linux/pci.h
===================================================================
--- linux-2.6.orig/include/linux/pci.h
+++ linux-2.6/include/linux/pci.h
@@ -55,6 +55,8 @@
 /* Include the ID list */
 #include <linux/pci_ids.h>
 
+#define KERN_PCI "<pci>"
+
 /* pci_slot represents a physical slot */
 struct pci_slot {
 	struct pci_bus *bus;		/* The bus this slot is on */

[PATCH 3/5] pci: using pci_printk v2

[Yinghai Lu]

v2: use printk(KERN_DEBUG KERN_PCI ...

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
 drivers/pci/probe.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

Index: linux-2.6/drivers/pci/probe.c
===================================================================
--- linux-2.6.orig/drivers/pci/probe.c
+++ linux-2.6/drivers/pci/probe.c
@@ -304,7 +304,7 @@ static int __pci_read_base(struct pci_de
 		} else {
 			res->start = l64;
 			res->end = l64 + sz64;
-			printk(KERN_DEBUG "PCI: %s reg %x 64bit mmio: [%llx, %llx]\n",
+			printk(KERN_DEBUG KERN_PCI "PCI: %s reg %x 64bit mmio: [%llx, %llx]\n",
 				 pci_name(dev), pos, res->start, res->end);
 		}
 	} else {
@@ -315,7 +315,7 @@ static int __pci_read_base(struct pci_de
 
 		res->start = l;
 		res->end = l + sz;
-		printk(KERN_DEBUG "PCI: %s reg %x %s: [%llx, %llx]\n", pci_name(dev),
+		printk(KERN_DEBUG KERN_PCI "PCI: %s reg %x %s: [%llx, %llx]\n", pci_name(dev),
 			 pos, (res->flags & IORESOURCE_IO) ? "io port":"32bit mmio",
 			 res->start, res->end);
 	}
@@ -388,7 +388,7 @@ void __devinit pci_read_bridge_bases(str
 			res->start = base;
 		if (!res->end)
 			res->end = limit + 0xfff;
-		printk(KERN_DEBUG "PCI: bridge %s io port: [%llx, %llx]\n",
+		printk(KERN_DEBUG KERN_PCI "PCI: bridge %s io port: [%llx, %llx]\n",
 				 pci_name(dev), res->start, res->end);
 	}
 
@@ -401,7 +401,7 @@ void __devinit pci_read_bridge_bases(str
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
 		res->start = base;
 		res->end = limit + 0xfffff;
-		printk(KERN_DEBUG "PCI: bridge %s 32bit mmio: [%llx, %llx]\n",
+		printk(KERN_DEBUG KERN_PCI "PCI: bridge %s 32bit mmio: [%llx, %llx]\n",
 				 pci_name(dev), res->start, res->end);
 	}
 
@@ -438,7 +438,7 @@ void __devinit pci_read_bridge_bases(str
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
 		res->start = base;
 		res->end = limit + 0xfffff;
-		printk(KERN_DEBUG "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n",
+		printk(KERN_DEBUG KERN_PCI "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n",
 				 pci_name(dev), (res->flags & PCI_PREF_RANGE_TYPE_64)?"64":"32",
 				 res->start, res->end);
 	}

[PATCH 4/5] acpi: add acpi_printk v3

[Yinghai Lu]

use DEFINE_LOGLEVEL_SETUP to set loglevel for acpi
v2: use <acpi, "acpi:"> instead
v3: use KERN_ACPI

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
 drivers/acpi/osl.c   |    2 ++
 include/linux/acpi.h |    1 +
 2 files changed, 3 insertions(+)

Index: linux-2.6/drivers/acpi/osl.c
===================================================================
--- linux-2.6.orig/drivers/acpi/osl.c
+++ linux-2.6/drivers/acpi/osl.c
@@ -75,6 +75,8 @@ EXPORT_SYMBOL(acpi_in_debugger);
 extern char line_buf[80];
 #endif				/*ENABLE_DEBUGGER */
 
+DEFINE_LOGLEVEL_SETUP(acpi, KERN_ACPI, "acpi:");
+
 static unsigned int acpi_irq_irq;
 static acpi_osd_handler acpi_irq_handler;
 static void *acpi_irq_context;
Index: linux-2.6/include/linux/acpi.h
===================================================================
--- linux-2.6.orig/include/linux/acpi.h
+++ linux-2.6/include/linux/acpi.h
@@ -43,6 +43,7 @@
 #include <asm/acpi.h>
 #include <linux/dmi.h>
 
+#define KERN_ACPI "<acpi>"
 
 enum acpi_irq_model_id {
 	ACPI_IRQ_MODEL_PIC = 0,

[PATCH 5/5] apci: dump slit v4

[Yinghai Lu]

v2: using boot_printk
v3: using acpi_printk
v4: using prink(KERN_DEBUG KERN_ACPI ... )

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
 drivers/acpi/numa.c |    8 ++++++++
 1 file changed, 8 insertions(+)

Index: linux-2.6/drivers/acpi/numa.c
===================================================================
--- linux-2.6.orig/drivers/acpi/numa.c
+++ linux-2.6/drivers/acpi/numa.c
@@ -150,6 +150,14 @@ static __init int slit_valid(struct acpi
 {
 	int i, j;
 	int d = slit->locality_count;
+	printk(KERN_DEBUG KERN_ACPI "ACPI: SLIT: nodes = %d\n", d);
+	for (i = 0; i < d; i++) {
+		for (j = 0; j < d; j++)  {
+			u8 val = slit->entry[d*i + j];
+			printk(KERN_CONT KERN_ACPI " %d", val);
+		}
+		printk(KERN_CONT KERN_ACPI "\n");
+	}
 	for (i = 0; i < d; i++) {
 		for (j = 0; j < d; j++)  {
 			u8 val = slit->entry[d*i + j];