diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/Kconfig | 18 | ||||
| -rw-r--r-- | arch/x86_64/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/vsmp.c | 45 |
3 files changed, 64 insertions, 0 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index ee053e32a721..2efc4be22709 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -79,6 +79,24 @@ source "init/Kconfig" menu "Processor type and features" choice + prompt "Subarchitecture Type" + default X86_PC + +config X86_PC + bool "PC-compatible" + help + Choose this option if your computer is a standard PC or compatible. + +config X86_VSMP + bool "Support for ScaleMP vSMP" + help + Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is + supposed to run on these EM64T-based machines. Only choose this option + if you have one of these machines. + +endchoice + +choice prompt "Processor family" default MK8 diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile index 7df09edb36a1..72fe60c20d39 100644 --- a/arch/x86_64/kernel/Makefile +++ b/arch/x86_64/kernel/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_GART_IOMMU) += pci-gart.o aperture.o obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_X86_PM_TIMER) += pmtimer.o +obj-$(CONFIG_X86_VSMP) += vsmp.o obj-$(CONFIG_MODULES) += module.o diff --git a/arch/x86_64/kernel/vsmp.c b/arch/x86_64/kernel/vsmp.c new file mode 100644 index 000000000000..92f70c74965f --- /dev/null +++ b/arch/x86_64/kernel/vsmp.c @@ -0,0 +1,45 @@ +/* + * vSMPowered(tm) systems specific initialization + * Copyright (C) 2005 ScaleMP Inc. + * + * Use of this code is subject to the terms and conditions of the + * GNU general public license version 2. See "COPYING" or + * http://www.gnu.org/licenses/gpl.html + * + * Ravikiran Thirumalai <kiran@scalemp.com>, + * Shai Fultheim <shai@scalemp.com> + */ + +#include <linux/init.h> +#include <linux/pci_ids.h> +#include <linux/pci_regs.h> +#include <asm/pci-direct.h> + +static int __init vsmp_init(void) +{ + void *address; + unsigned int cap, ctl; + + /* Check if we are running on a ScaleMP vSMP box */ + if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) != PCI_VENDOR_ID_SCALEMP) || + (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) != PCI_DEVICE_ID_SCALEMP_VSMP_CTL)) + return 0; + + /* set vSMP magic bits to indicate vSMP capable kernel */ + address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8); + cap = readl(address); + ctl = readl(address + 4); + printk("vSMP CTL: capabilities:0x%08x control:0x%08x\n", cap, ctl); + if (cap & ctl & (1 << 4)) { + /* Turn on vSMP IRQ fastpath handling (see system.h) */ + ctl &= ~(1 << 4); + writel(ctl, address + 4); + ctl = readl(address + 4); + printk("vSMP CTL: control set to:0x%08x\n", ctl); + } + + iounmap(address); + return 0; +} + +core_initcall(vsmp_init); |
