brain-hackers_pepepper-mirror
/
linux-brain
mirror of https://github.com/brain-hackers/linux-brain.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

xen: set cpu capabilities from xen_start_kernel() 

There is no need to set the same capabilities for each cpu
individually. This can easily be done for all cpus when starting the
kernel.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2017-04-13 08:55:41 +02:00
parent 31d47266c6
commit 0808e80cb7
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/x86/xen/enlighten_pv.c
View File

@ -327,6 +327,12 @@ static void __init xen_init_cpuid_mask(void)
cpuid_leaf1_ecx_set_mask = (1 << (X86_FEATURE_MWAIT % 32));
}
static void __init xen_init_capabilities(void)
{
setup_clear_cpu_cap(X86_BUG_SYSRET_SS_ATTRS);
setup_force_cpu_cap(X86_FEATURE_XENPV);
}
static void xen_set_debugreg(int reg, unsigned long val)
{
HYPERVISOR_set_debugreg(reg, val);
@ -1318,6 +1324,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_init_irq_ops();
xen_init_cpuid_mask();
xen_init_capabilities();
#ifdef CONFIG_X86_LOCAL_APIC
/*
@ -1506,16 +1513,9 @@ static uint32_t __init xen_platform_pv(void)
return 0;
}
static void xen_set_cpu_features(struct cpuinfo_x86 *c)
{
clear_cpu_bug(c, X86_BUG_SYSRET_SS_ATTRS);
set_cpu_cap(c, X86_FEATURE_XENPV);
}
const struct hypervisor_x86 x86_hyper_xen_pv = {
.name = "Xen PV",
.detect = xen_platform_pv,
.set_cpu_features = xen_set_cpu_features,
.pin_vcpu = xen_pin_vcpu,
};
EXPORT_SYMBOL(x86_hyper_xen_pv);