lkml.org 
[lkml]   [2022]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectRe: [PATCH v2 26/50] KVM: PPC: Move processor compatibility check to module init
Date
Sean Christopherson <seanjc@google.com> writes:
> Move KVM PPC's compatibility checks to their respective module_init()
> hooks, there's no need to wait until KVM's common compat check, nor is
> there a need to perform the check on every CPU (provided by common KVM's
> hook), as the compatibility checks operate on global data.
>
> arch/powerpc/include/asm/cputable.h: extern struct cpu_spec *cur_cpu_spec;
> 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")

I'm not sure that output is really useful in the change log unless you
explain more about what it is.

> diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c
> index 57e0ad6a2ca3..795667f7ebf0 100644
> --- a/arch/powerpc/kvm/e500mc.c
> +++ b/arch/powerpc/kvm/e500mc.c
> @@ -388,6 +388,10 @@ static int __init kvmppc_e500mc_init(void)
> {
> int r;
>
> + r = kvmppc_e500mc_check_processor_compat();
> + if (r)
> + return kvmppc_e500mc;

This doesn't build:

linux/arch/powerpc/kvm/e500mc.c: In function ‘kvmppc_e500mc_init’:
linux/arch/powerpc/kvm/e500mc.c:391:13: error: implicit declaration of function ‘kvmppc_e500mc_check_processor_compat’; did you mean ‘kvmppc_core_check_processor_compat’? [-Werror=implicit-function-declaration]
391 | r = kvmppc_e500mc_check_processor_compat();
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| kvmppc_core_check_processor_compat
linux/arch/powerpc/kvm/e500mc.c:393:24: error: ‘kvmppc_e500mc’ undeclared (first use in this function); did you mean ‘kvm_ops_e500mc’?
393 | return kvmppc_e500mc;
| ^~~~~~~~~~~~~
| kvm_ops_e500mc
linux/arch/powerpc/kvm/e500mc.c:393:24: note: each undeclared identifier is reported only once for each function it appears in


It needs the delta below to compile.

With that:

Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

cheers


diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c
index 795667f7ebf0..4564aa27edcf 100644
--- a/arch/powerpc/kvm/e500mc.c
+++ b/arch/powerpc/kvm/e500mc.c
@@ -168,7 +168,7 @@ static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu)
kvmppc_booke_vcpu_put(vcpu);
}

-int kvmppc_core_check_processor_compat(void)
+int kvmppc_e500mc_check_processor_compat(void)
{
int r;

@@ -390,7 +390,7 @@ static int __init kvmppc_e500mc_init(void)

r = kvmppc_e500mc_check_processor_compat();
if (r)
- return kvmppc_e500mc;
+ goto err_out;

r = kvmppc_booke_init();
if (r)
\
 
 \ /
  Last update: 2022-12-01 06:22    [W:0.393 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site