linux-kernel - Re: [PATCH v4 09/34] KVM: selftests: Add a selftest for guest prints and formatted asserts

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Date:   Mon, 31 Jul 2023 10:19:47 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Andrew Jones <ajones@...tanamicro.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Thomas Huth <thuth@...hat.com>,
        "Philippe Mathieu-Daudé" <philmd@...aro.org>,
        Aaron Lewis <aaronlewis@...gle.com>
Subject: Re: [PATCH v4 09/34] KVM: selftests: Add a selftest for guest prints
 and formatted asserts

On Mon, Jul 31, 2023, Sean Christopherson wrote:
> On Mon, Jul 31, 2023, Andrew Jones wrote:
> > diff --git a/tools/testing/selftests/kvm/include/ucall_common.h b/tools/testing/selftests/kvm/include/ucall_common.h
> > index 4cf69fa8bfba..4adf526dc378 100644
> > --- a/tools/testing/selftests/kvm/include/ucall_common.h
> > +++ b/tools/testing/selftests/kvm/include/ucall_common.h
> > @@ -6,8 +6,19 @@
> >   */
> >  #ifndef SELFTEST_KVM_UCALL_COMMON_H
> >  #define SELFTEST_KVM_UCALL_COMMON_H
> > +#include <linux/kvm.h>
> >  #include "test_util.h"
> >  
> > +#if defined(__aarch64__)
> > +#define UCALL_EXIT_REASON      KVM_EXIT_MMIO
> > +#elif defined(__x86_64__)
> > +#define UCALL_EXIT_REASON      KVM_EXIT_IO
> > +#elif defined(__s390x__)
> > +#define UCALL_EXIT_REASON      KVM_EXIT_S390_SIEIC
> > +#elif defined(__riscv)
> > +#define UCALL_EXIT_REASON      KVM_EXIT_RISCV_SBI
> > +#endif
> > +
> >  /* Common ucalls */
> >  enum {
> >         UCALL_NONE,
> > 
> > and then compiled the test for riscv and it passed. I also ran all other
> > riscv tests successfully.
> 
> Can I have your SoB for the ucall_common.h patch?  I'll write a changelog and fold
> in a separate prep patch for that change.

On second thought, I take that back.  I think it makes more sense to add a ucall.h
for each arch and #define the exit type there.  All then move all of the
ucall_arch_do_ucall() implementations to ucall.h (except maybe x86 while it has
the horrific save/restore GPRs hack...).  That way the #define is colocated with
the code that generates the exit reason.