[PATCH v4 23/26] RFC: KVM: powerpc: Move processor compatibility check to hardware setup

[isaku . yamahata]

From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

Move processor compatibility check from kvm_arch_processor_compat() into
kvm_arch_hardware_setup().  The check does model name comparison with a
global variable, cur_cpu_spec.  There is no point to check it at run time
on all processors.

Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: Fabiano Rosas <farosas@xxxxxxxxxxxxx>
---
 arch/powerpc/kvm/powerpc.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 7b56d6ccfdfb..7e3a6659f107 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -444,12 +444,21 @@ int kvm_arch_hardware_enable(void)
 
 int kvm_arch_hardware_setup(void *opaque)
 {
-	return 0;
+	/*
+	 * kvmppc_core_check_processor_compat() checks the global variable.
+	 * No point to check on all processors or at runtime.
+	 * arch/powerpc/kvm/book3s.c: return 0
+	 * arch/powerpc/kvm/e500.c: strcmp(cur_cpu_spec->cpu_name, "e500v2")
+	 * arch/powerpc/kvm/e500mc.c: strcmp(cur_cpu_spec->cpu_name, "e500mc")
+	 *                            strcmp(cur_cpu_spec->cpu_name, "e5500")
+	 *                            strcmp(cur_cpu_spec->cpu_name, "e6500")
+	 */
+	return kvmppc_core_check_processor_compat();
 }
 
 int kvm_arch_check_processor_compat(void)
 {
-	return kvmppc_core_check_processor_compat();
+	return 0;
 }
 
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
-- 
2.25.1