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Message-ID: <20120105152035.GA11286@elte.hu>
Date: Thu, 5 Jan 2012 16:20:35 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/platform changes for v3.3
Linus,
Please pull the latest x86-platform-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-platform-for-linus
out-of-topic modifications in x86-platform-for-linus:
-----------------------------------------------------
drivers/platform/x86/Kconfig # c95aaef: x86/intel/scu/ipc: Match the chan
drivers/rtc/Kconfig # 933b946: x86/intel config: Revamp configur
init/calibrate.c # b565201: x86: Reduce clock calibration tim
Thanks,
Ingo
------------------>
Alan Cox (7):
x86/sfi: Kill the IRQ as id hack
x86/config: Revamp configuration for MID devices
x86: Fix INTEL_MID silly
x86/apb: Fix configuration constraints
x86/intel/scu/ipc: Match the changes in the x86 configuration
x86/intel config: Revamp configuration to allow for Moorestown and Medfield
x86/intel config: Fix the APB_TIMER selection
Alessandro Rubini (1):
x86/Kconfig: Cyclone-timer depends on x86-summit
Jack Steiner (1):
x86: Reduce clock calibration time during slave cpu startup
Michael Demeter (1):
x86/mrst: Add additional debug prints for pb_keys
arch/x86/Kconfig | 31 +++++++++++++++++++++++++++----
arch/x86/Kconfig.debug | 6 +++---
arch/x86/include/asm/fixmap.h | 2 +-
arch/x86/include/asm/setup.h | 2 +-
arch/x86/kernel/early_printk.c | 2 +-
arch/x86/kernel/smpboot.c | 16 +++++++++++-----
arch/x86/kernel/tsc.c | 20 ++++++++++++++++++++
arch/x86/pci/Makefile | 2 +-
arch/x86/platform/mrst/Makefile | 6 +++---
arch/x86/platform/mrst/mrst.c | 4 ++--
drivers/platform/x86/Kconfig | 2 +-
drivers/rtc/Kconfig | 6 +++---
init/calibrate.c | 15 +++++++++++++++
13 files changed, 89 insertions(+), 25 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index efb4294..78fbb34 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -409,12 +409,14 @@ config X86_MRST
depends on PCI
depends on PCI_GOANY
depends on X86_IO_APIC
+ select X86_INTEL_MID
+ select SFI
+ select DW_APB_TIMER
select APB_TIMER
select I2C
select SPI
select INTEL_SCU_IPC
select X86_PLATFORM_DEVICES
- select X86_INTEL_MID
---help---
Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
Internet Device(MID) platform. Moorestown consists of two chips:
@@ -423,6 +425,26 @@ config X86_MRST
nor standard legacy replacement devices/features. e.g. Moorestown does
not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
+config X86_MDFLD
+ bool "Medfield MID platform"
+ depends on PCI
+ depends on PCI_GOANY
+ depends on X86_IO_APIC
+ select X86_INTEL_MID
+ select SFI
+ select DW_APB_TIMER
+ select APB_TIMER
+ select I2C
+ select SPI
+ select INTEL_SCU_IPC
+ select X86_PLATFORM_DEVICES
+ ---help---
+ Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin
+ Internet Device(MID) platform.
+ Unlike standard x86 PCs, Medfield does not have many legacy devices
+ nor standard legacy replacement devices/features. e.g. Medfield does
+ not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
+
endif
config X86_RDC321X
@@ -620,7 +642,7 @@ config X86_SUMMIT_NUMA
config X86_CYCLONE_TIMER
def_bool y
- depends on X86_32_NON_STANDARD
+ depends on X86_SUMMIT
source "arch/x86/Kconfig.cpu"
@@ -648,9 +670,10 @@ config HPET_EMULATE_RTC
depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
config APB_TIMER
- def_bool y if MRST
- prompt "Langwell APB Timer Support" if X86_MRST
+ def_bool y if X86_INTEL_MID
+ prompt "Intel MID APB Timer Support" if X86_INTEL_MID
select DW_APB_TIMER
+ depends on X86_INTEL_MID && SFI
help
APB timer is the replacement for 8254, HPET on X86 MID platforms.
The APBT provides a stable time base on SMP
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index bf56e17..28c3c73 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -43,9 +43,9 @@ config EARLY_PRINTK
with klogd/syslogd or the X server. You should normally N here,
unless you want to debug such a crash.
-config EARLY_PRINTK_MRST
- bool "Early printk for MRST platform support"
- depends on EARLY_PRINTK && X86_MRST
+config EARLY_PRINTK_INTEL_MID
+ bool "Early printk for Intel MID platform support"
+ depends on EARLY_PRINTK && X86_INTEL_MID
config EARLY_PRINTK_DBGP
bool "Early printk via EHCI debug port"
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index 460c74e..4da3c0c 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -117,7 +117,7 @@ enum fixed_addresses {
#endif
FIX_TEXT_POKE1, /* reserve 2 pages for text_poke() */
FIX_TEXT_POKE0, /* first page is last, because allocation is backward */
-#ifdef CONFIG_X86_MRST
+#ifdef CONFIG_X86_INTEL_MID
FIX_LNW_VRTC,
#endif
__end_of_permanent_fixed_addresses,
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 9756551..d0f19f9 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -47,7 +47,7 @@ extern void reserve_standard_io_resources(void);
extern void i386_reserve_resources(void);
extern void setup_default_timer_irq(void);
-#ifdef CONFIG_X86_MRST
+#ifdef CONFIG_X86_INTEL_MID
extern void x86_mrst_early_setup(void);
#else
static inline void x86_mrst_early_setup(void) { }
diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index cd28a35..7a53da0 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -240,7 +240,7 @@ static int __init setup_early_printk(char *buf)
if (!strncmp(buf, "xen", 3))
early_console_register(&xenboot_console, keep);
#endif
-#ifdef CONFIG_EARLY_PRINTK_MRST
+#ifdef CONFIG_EARLY_PRINTK_INTEL_MID
if (!strncmp(buf, "mrst", 4)) {
mrst_early_console_init();
early_console_register(&early_mrst_console, keep);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 9f548cb..00eef55 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -207,23 +207,29 @@ static void __cpuinit smp_callin(void)
* Need to setup vector mappings before we enable interrupts.
*/
setup_vector_irq(smp_processor_id());
+
+ /*
+ * Save our processor parameters. Note: this information
+ * is needed for clock calibration.
+ */
+ smp_store_cpu_info(cpuid);
+
/*
* Get our bogomips.
+ * Update loops_per_jiffy in cpu_data. Previous call to
+ * smp_store_cpu_info() stored a value that is close but not as
+ * accurate as the value just calculated.
*
* Need to enable IRQs because it can take longer and then
* the NMI watchdog might kill us.
*/
local_irq_enable();
calibrate_delay();
+ cpu_data(cpuid).loops_per_jiffy = loops_per_jiffy;
local_irq_disable();
pr_debug("Stack at about %p\n", &cpuid);
/*
- * Save our processor parameters
- */
- smp_store_cpu_info(cpuid);
-
- /*
* This must be done before setting cpu_online_mask
* or calling notify_cpu_starting.
*/
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index db48336..490fb33 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -995,3 +995,23 @@ void __init tsc_init(void)
check_system_tsc_reliable();
}
+#ifdef CONFIG_SMP
+/*
+ * If we have a constant TSC and are using the TSC for the delay loop,
+ * we can skip clock calibration if another cpu in the same socket has already
+ * been calibrated. This assumes that CONSTANT_TSC applies to all
+ * cpus in the socket - this should be a safe assumption.
+ */
+unsigned long __cpuinit calibrate_delay_is_known(void)
+{
+ int i, cpu = smp_processor_id();
+
+ if (!tsc_disabled && !cpu_has(&cpu_data(cpu), X86_FEATURE_CONSTANT_TSC))
+ return 0;
+
+ for_each_online_cpu(i)
+ if (cpu_data(i).phys_proc_id == cpu_data(cpu).phys_proc_id)
+ return cpu_data(i).loops_per_jiffy;
+ return 0;
+}
+#endif
diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile
index 6b8759f..75b06f3 100644
--- a/arch/x86/pci/Makefile
+++ b/arch/x86/pci/Makefile
@@ -15,7 +15,7 @@ obj-$(CONFIG_X86_VISWS) += visws.o
obj-$(CONFIG_X86_NUMAQ) += numaq_32.o
-obj-$(CONFIG_X86_MRST) += mrst.o
+obj-$(CONFIG_X86_INTEL_MID) += mrst.o
obj-y += common.o early.o
obj-y += amd_bus.o bus_numa.o
diff --git a/arch/x86/platform/mrst/Makefile b/arch/x86/platform/mrst/Makefile
index 1ea3877..7baed51 100644
--- a/arch/x86/platform/mrst/Makefile
+++ b/arch/x86/platform/mrst/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_X86_MRST) += mrst.o
-obj-$(CONFIG_X86_MRST) += vrtc.o
-obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o
+obj-$(CONFIG_X86_INTEL_MID) += mrst.o
+obj-$(CONFIG_X86_INTEL_MID) += vrtc.o
+obj-$(CONFIG_EARLY_PRINTK_INTEL_MID) += early_printk_mrst.o
obj-$(CONFIG_X86_MRST) += pmu.o
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index ad4ec1c..475e2cd 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -848,8 +848,7 @@ static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *entry)
if (mrst_has_msic())
return;
- /* ID as IRQ is a hack that will go away */
- pdev = platform_device_alloc(entry->name, entry->irq);
+ pdev = platform_device_alloc(entry->name, 0);
if (pdev == NULL) {
pr_err("out of memory for SFI platform device '%s'.\n",
entry->name);
@@ -1030,6 +1029,7 @@ static int __init pb_keys_init(void)
num = sizeof(gpio_button) / sizeof(struct gpio_keys_button);
for (i = 0; i < num; i++) {
gb[i].gpio = get_gpio_by_name(gb[i].desc);
+ pr_debug("info[%2d]: name = %s, gpio = %d\n", i, gb[i].desc, gb[i].gpio);
if (gb[i].gpio == -1)
continue;
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 7f43cf8..f995e6e 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -639,7 +639,7 @@ config ACPI_CMPC
config INTEL_SCU_IPC
bool "Intel SCU IPC Support"
- depends on X86_MRST
+ depends on X86_INTEL_MID
default y
---help---
IPC is used to bridge the communications between kernel and SCU on
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 53eb4e5..3a125b8 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -498,9 +498,9 @@ config RTC_DRV_CMOS
will be called rtc-cmos.
config RTC_DRV_VRTC
- tristate "Virtual RTC for Moorestown platforms"
- depends on X86_MRST
- default y if X86_MRST
+ tristate "Virtual RTC for Intel MID platforms"
+ depends on X86_INTEL_MID
+ default y if X86_INTEL_MID
help
Say "yes" here to get direct support for the real time clock
diff --git a/init/calibrate.c b/init/calibrate.c
index 24df797..5f117ca 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -246,6 +246,19 @@ recalibrate:
static DEFINE_PER_CPU(unsigned long, cpu_loops_per_jiffy) = { 0 };
+/*
+ * Check if cpu calibration delay is already known. For example,
+ * some processors with multi-core sockets may have all cores
+ * with the same calibration delay.
+ *
+ * Architectures should override this function if a faster calibration
+ * method is available.
+ */
+unsigned long __attribute__((weak)) __cpuinit calibrate_delay_is_known(void)
+{
+ return 0;
+}
+
void __cpuinit calibrate_delay(void)
{
unsigned long lpj;
@@ -265,6 +278,8 @@ void __cpuinit calibrate_delay(void)
lpj = lpj_fine;
pr_info("Calibrating delay loop (skipped), "
"value calculated using timer frequency.. ");
+ } else if ((lpj = calibrate_delay_is_known())) {
+ ;
} else if ((lpj = calibrate_delay_direct()) != 0) {
if (!printed)
pr_info("Calibrating delay using timer "
--
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