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Subject[PATCH v3 01/11] xen: set cpu capabilities from xen_start_kernel()
Date
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>
---
arch/x86/xen/enlighten_pv.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index b226f67fb741..6dc922e3848a 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -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);
--
2.12.0
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