[GIT PULL] x86 fixes

Ingo Molnar
2009-08-28T10:40:32Z

Linus,

Please pull the latest x86-fixes-for-linus git tree from:

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

Thanks,

Ingo

------------------>
H. Peter Anvin (1):
x86, xen: Initialize cx to suppress warning

Jeremy Fitzhardinge (1):
x86, xen: Suppress WP test on Xen

Yinghai Lu (1):
x86: Fix vSMP boot crash

arch/x86/kernel/apic/probe_64.c | 10 ++++++++++
arch/x86/xen/enlighten.c | 2 ++
2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
index bc3e880..fcec2f1 100644
--- a/arch/x86/kernel/apic/probe_64.c
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -44,6 +44,11 @@ static struct apic *apic_probe[] __initdata = {
NULL,
};

+static int apicid_phys_pkg_id(int initial_apic_id, int index_msb)
+{
+ return hard_smp_processor_id() >> index_msb;
+}
+
/*
* Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
*/
@@ -69,6 +74,11 @@ void __init default_setup_apic_routing(void)
printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
}

+ if (is_vsmp_box()) {
+ /* need to update phys_pkg_id */
+ apic->phys_pkg_id = apicid_phys_pkg_id;
+ }
+
/*
* Now that apic routing model is selected, configure the
* fault handling for intr remapping.
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index e90540a..eb33aaa 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -215,6 +215,7 @@ static __init void xen_init_cpuid_mask(void)
(1 << X86_FEATURE_ACPI)); /* disable ACPI */

ax = 1;
+ cx = 0;
xen_cpuid(&ax, &bx, &cx, &dx);

/* cpuid claims we support xsave; try enabling it to see what happens */
@@ -1059,6 +1060,7 @@ asmlinkage void __init xen_start_kernel(void)
/* set up basic CPUID stuff */
cpu_detect(&new_cpu_data);
new_cpu_data.hard_math = 1;
+ new_cpu_data.wp_works_ok = 1;
new_cpu_data.x86_capability[0] = cpuid_edx(1);
#endif