From: David Matlack <dmatlack@google.com>
To: Vishal Annapurve <vannapurve@google.com>
Cc: Andrew Jones <andrew.jones@linux.dev>, x86 <x86@kernel.org>,
kvm list <kvm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-kselftest@vger.kernel.org,
Paolo Bonzini <pbonzini@redhat.com>, shuah <shuah@kernel.org>,
Ben Gardon <bgardon@google.com>,
Sean Christopherson <seanjc@google.com>,
oupton@google.com, peterx@redhat.com,
Vitaly Kuznetsov <vkuznets@redhat.com>,
drjones@redhat.com
Subject: Re: [V1 PATCH 2/5] selftests: kvm: Introduce kvm_arch_main and helpers
Date: Thu, 8 Sep 2022 14:21:52 -0700 [thread overview]
Message-ID: <Yxpc8NDdtdOl9wpH@google.com> (raw)
In-Reply-To: <CAGtprH9Kaemwupgoo_kgM-Ci2cnN2kpXa+ZwEymSnYNFhS9Fsg@mail.gmail.com>
On Tue, Sep 06, 2022 at 03:46:20PM -0700, Vishal Annapurve wrote:
> On Mon, Sep 5, 2022 at 12:46 AM Andrew Jones <andrew.jones@linux.dev> wrote:
> >
> > On Sat, Sep 03, 2022 at 01:28:46AM +0000, Vishal Annapurve wrote:
> > > Introduce following APIs:
> > > 1) kvm_arch_main : to be called at the startup of each test.
> >
> > With this, AArch64 can move the content of its constructor,
> > init_guest_modes(), into kvm_arch_main(). Or, instead of the
> >
> > main()
> > {
> > /* common main stuff */
> > kvm_arch_main();
> > __main();
> > }
> >
> > approach we could have each arch provide a constructor
> >
> > arch_init()
> > {
> > common_pre_main_stuff();
> > /* arch specific pre-main stuff */
> > }
> >
> > I personally prefer the latter.
> >
>
> I agree with your suggestion of using constructors here. This will
> help avoid changes in all the selftests.
> Maybe I can add a common constructor that can invoke arch specific
> init. I will add this change in the next series.
In case anyone else is confused like me: "constructor" refers to
__attribute__ ((constructor)), which causes the function to run before
main().
I have a slight preference for having as few constructors as possible,
since they are somewhat subtle. So how about one constructor for all
selftests, e.g.:
void __attribute__ ((constructor)) kvm_selftest_init(void)
{
/* Tell stdout not to buffer its content. */
setbuf(stdout, NULL);
kvm_selftest_arch_init();
}
Per-arch:
void kvm_selftest_arch_init(void)
{
/* arch-specific pre-main stuff */
}
next prev parent reply other threads:[~2022-09-08 21:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-03 1:28 [V1 PATCH 0/5] Execute hypercalls from guests according to cpu type Vishal Annapurve
2022-09-03 1:28 ` [V1 PATCH 1/5] selftests: kvm: move common startup logic to kvm_util.c Vishal Annapurve
2022-09-08 21:09 ` David Matlack
2022-09-14 19:09 ` Vishal Annapurve
2022-09-03 1:28 ` [V1 PATCH 2/5] selftests: kvm: Introduce kvm_arch_main and helpers Vishal Annapurve
2022-09-05 7:46 ` Andrew Jones
2022-09-06 22:46 ` Vishal Annapurve
2022-09-08 21:21 ` David Matlack [this message]
2022-09-09 7:01 ` Andrew Jones
2022-09-14 19:13 ` Vishal Annapurve
2022-09-08 21:27 ` David Matlack
2022-09-03 1:28 ` [V1 PATCH 3/5] selftests: kvm: x86: Execute vmcall/vmmcall according to CPU type Vishal Annapurve
2022-09-08 22:54 ` David Matlack
2022-09-08 22:57 ` David Matlack
2022-09-14 19:12 ` Vishal Annapurve
2022-09-03 1:28 ` [V1 PATCH 4/5] selftests: kvm: delete svm_vmcall_test Vishal Annapurve
2022-09-03 1:28 ` [V1 PATCH 5/5] selftests: kvm: Execute vmcall/vmmcall as per cpu type Vishal Annapurve
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