shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 03:40:35 +09:00
Code Issues Packages Projects Releases Wiki Activity

xen: set cpu capabilities from xen_start_kernel()

Browse Source 
Upstream commit: 0808e80cb7 ("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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Juergen Gross
2018-05-30 13:09:57 +02:00
committed by Greg Kroah-Hartman
parent 474928b8f0
commit bb70de1f99
1 changed files with 9 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/x86/xen/enlighten.c
View File

@@ -472,6 +472,14 @@ 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)
{
if (xen_pv_domain()) {
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);
@@ -1634,6 +1642,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_init_irq_ops();
xen_init_cpuid_mask();
xen_init_capabilities();
#ifdef CONFIG_X86_LOCAL_APIC
/*
@@ -1978,14 +1987,6 @@ bool xen_hvm_need_lapic(void)
}
EXPORT_SYMBOL_GPL(xen_hvm_need_lapic);
static void xen_set_cpu_features(struct cpuinfo_x86 *c)
{
if (xen_pv_domain()) {
clear_cpu_bug(c, X86_BUG_SYSRET_SS_ATTRS);
set_cpu_cap(c, X86_FEATURE_XENPV);
}
}
static void xen_pin_vcpu(int cpu)
{
static bool disable_pinning;
@@ -2032,7 +2033,6 @@ const struct hypervisor_x86 x86_hyper_xen = {
.init_platform = xen_hvm_guest_init,
#endif
.x2apic_available = xen_x2apic_para_available,
.set_cpu_features = xen_set_cpu_features,
.pin_vcpu = xen_pin_vcpu,
};
EXPORT_SYMBOL(x86_hyper_xen);