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Subject[PATCH v5 26/30] KVM: x86: Make x86 processor compat check callback empty
Date
From: Isaku Yamahata <isaku.yamahata@intel.com>

Move processor compatibility check on all processors into
kvm_arch_hardware_setup() and make kvm_arch_check_processor_compat{,_all}()
empty. This is a preparation step to eliminate them.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
arch/x86/kvm/x86.c | 45 +++++++++++++++++++++++++++++----------------
1 file changed, 29 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index aa6594de1fc1..00cc74276819 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -129,6 +129,8 @@ static int kvm_vcpu_do_singlestep(struct kvm_vcpu *vcpu);
static int __set_sregs2(struct kvm_vcpu *vcpu, struct kvm_sregs2 *sregs2);
static void __get_sregs2(struct kvm_vcpu *vcpu, struct kvm_sregs2 *sregs2);

+static int kvm_check_processor_compatibility(void);
+
struct kvm_x86_ops kvm_x86_ops __read_mostly;

#define KVM_X86_OP(func) \
@@ -12033,21 +12035,8 @@ int kvm_arch_del_vm(int usage_count)
return 0;
}

-static void check_processor_compat(void *rtn)
-{
- *(int *)rtn = kvm_arch_check_processor_compat();
-}
-
int kvm_arch_check_processor_compat_all(void)
{
- int cpu;
- int r;
-
- for_each_online_cpu(cpu) {
- smp_call_function_single(cpu, check_processor_compat, &r, 1);
- if (r < 0)
- return r;
- }
return 0;
}

@@ -12055,7 +12044,7 @@ int kvm_arch_online_cpu(unsigned int cpu, int usage_count)
{
int ret;

- ret = kvm_arch_check_processor_compat();
+ ret = kvm_check_processor_compatibility();
if (ret)
return ret;

@@ -12125,6 +12114,24 @@ static inline void kvm_ops_update(struct kvm_x86_init_ops *ops)
kvm_pmu_ops_update(ops->pmu_ops);
}

+static void check_processor_compat(void *rtn)
+{
+ *(int *)rtn = kvm_check_processor_compatibility();
+}
+
+static int kvm_check_processor_compatibility_all(void)
+{
+ int cpu;
+ int r;
+
+ for_each_online_cpu(cpu) {
+ smp_call_function_single(cpu, check_processor_compat, &r, 1);
+ if (r < 0)
+ return r;
+ }
+ return 0;
+}
+
int kvm_arch_hardware_setup(void *opaque)
{
struct kvm_x86_init_ops *ops = opaque;
@@ -12165,7 +12172,8 @@ int kvm_arch_hardware_setup(void *opaque)
}
kvm_caps.default_tsc_scaling_ratio = 1ULL << kvm_caps.tsc_scaling_ratio_frac_bits;
kvm_init_msr_list();
- return 0;
+
+ return kvm_check_processor_compatibility_all();
}

void kvm_arch_hardware_unsetup(void)
@@ -12175,7 +12183,7 @@ void kvm_arch_hardware_unsetup(void)
static_call(kvm_x86_hardware_unsetup)();
}

-int kvm_arch_check_processor_compat(void)
+static int kvm_check_processor_compatibility(void)
{
int cpu = smp_processor_id();
struct cpuinfo_x86 *c = &cpu_data(cpu);
@@ -12195,6 +12203,11 @@ int kvm_arch_check_processor_compat(void)
return static_call(kvm_x86_check_processor_compatibility)();
}

+int kvm_arch_check_processor_compat(void)
+{
+ return 0;
+}
+
bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
{
return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id;
--
2.25.1
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