linux-kernel - Re: [Patch v2 3/4] KVM: selftests: Add macro to generate KVM exit reason strings

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Date:   Mon, 6 Feb 2023 12:51:57 -0800
From:   Vipin Sharma <vipinsh@...gle.com>
To:     seanjc@...gle.com, pbonzini@...hat.com, maz@...nel.org,
        james.morse@....com, suzuki.poulose@....com,
        oliver.upton@...ux.dev, yuzenghui@...wei.com,
        borntraeger@...ux.ibm.com, frankja@...ux.ibm.com,
        imbrenda@...ux.ibm.com, david@...hat.com
Cc:     dmatlack@...gle.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Patch v2 3/4] KVM: selftests: Add macro to generate KVM exit
 reason strings

On Fri, Feb 3, 2023 at 5:46 PM Vipin Sharma <vipinsh@...gle.com> wrote:
>
> From: Sean Christopherson <seanjc@...gle.com>
>
> Add and use a macro to generate the KVM exit reason strings array
> instead of relying on developers to correctly copy+paste+edit each
> string.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  tools/testing/selftests/kvm/lib/kvm_util.c | 52 +++++++++++-----------
>  1 file changed, 27 insertions(+), 25 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 56d5ea949cbb..2413ce511d20 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -1815,37 +1815,39 @@ void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
>                 vcpu_dump(stream, vcpu, indent + 2);
>  }
>
> +#define KVM_EXIT_STRING(x) {KVM_EXIT_##x, #x}
> +
>  /* Known KVM exit reasons */
>  static struct exit_reason {
>         unsigned int reason;
>         const char *name;
>  } exit_reasons_known[] = {
> -       {KVM_EXIT_UNKNOWN, "UNKNOWN"},
> -       {KVM_EXIT_EXCEPTION, "EXCEPTION"},
> -       {KVM_EXIT_IO, "IO"},
> -       {KVM_EXIT_HYPERCALL, "HYPERCALL"},
> -       {KVM_EXIT_DEBUG, "DEBUG"},
> -       {KVM_EXIT_HLT, "HLT"},
> -       {KVM_EXIT_MMIO, "MMIO"},
> -       {KVM_EXIT_IRQ_WINDOW_OPEN, "IRQ_WINDOW_OPEN"},
> -       {KVM_EXIT_SHUTDOWN, "SHUTDOWN"},
> -       {KVM_EXIT_FAIL_ENTRY, "FAIL_ENTRY"},
> -       {KVM_EXIT_INTR, "INTR"},
> -       {KVM_EXIT_SET_TPR, "SET_TPR"},
> -       {KVM_EXIT_TPR_ACCESS, "TPR_ACCESS"},
> -       {KVM_EXIT_S390_SIEIC, "S390_SIEIC"},
> -       {KVM_EXIT_S390_RESET, "S390_RESET"},
> -       {KVM_EXIT_DCR, "DCR"},
> -       {KVM_EXIT_NMI, "NMI"},
> -       {KVM_EXIT_INTERNAL_ERROR, "INTERNAL_ERROR"},
> -       {KVM_EXIT_OSI, "OSI"},
> -       {KVM_EXIT_PAPR_HCALL, "PAPR_HCALL"},
> -       {KVM_EXIT_DIRTY_RING_FULL, "DIRTY_RING_FULL"},
> -       {KVM_EXIT_X86_RDMSR, "RDMSR"},
> -       {KVM_EXIT_X86_WRMSR, "WRMSR"},
> -       {KVM_EXIT_XEN, "XEN"},
> +       KVM_EXIT_STRING(UNKNOWN),
> +       KVM_EXIT_STRING(EXCEPTION),
> +       KVM_EXIT_STRING(IO),
> +       KVM_EXIT_STRING(HYPERCALL),
> +       KVM_EXIT_STRING(DEBUG),
> +       KVM_EXIT_STRING(HLT),
> +       KVM_EXIT_STRING(MMIO),
> +       KVM_EXIT_STRING(IRQ_WINDOW_OPEN),
> +       KVM_EXIT_STRING(SHUTDOWN),
> +       KVM_EXIT_STRING(FAIL_ENTRY),
> +       KVM_EXIT_STRING(INTR),
> +       KVM_EXIT_STRING(SET_TPR),
> +       KVM_EXIT_STRING(TPR_ACCESS),
> +       KVM_EXIT_STRING(S390_SIEIC),
> +       KVM_EXIT_STRING(S390_RESET),
> +       KVM_EXIT_STRING(DCR),
> +       KVM_EXIT_STRING(NMI),
> +       KVM_EXIT_STRING(INTERNAL_ERROR),
> +       KVM_EXIT_STRING(OSI),
> +       KVM_EXIT_STRING(PAPR_HCALL),
> +       KVM_EXIT_STRING(DIRTY_RING_FULL),
> +       KVM_EXIT_STRING(X86_RDMSR),
> +       KVM_EXIT_STRING(X86_WRMSR),
> +       KVM_EXIT_STRING(XEN),
>  #ifdef KVM_EXIT_MEMORY_NOT_PRESENT
> -       {KVM_EXIT_MEMORY_NOT_PRESENT, "MEMORY_NOT_PRESENT"},
> +       KVM_EXIT_STRING(MEMORY_NOT_PRESENT),
>  #endif
>  };
>
> --
> 2.39.1.519.gcb327c4b5f-goog
>

Sean,
I had to manually create this commit in my tree, your patch in the
email was complaining about some non-existent SHA.
https://lore.kernel.org/lkml/Y9r0q9cuK%2Fifu+OW@google.com/

Only difference from your patch is that KVM_EXIT_STRING(HYPERV) is not
present in the patch above. As this exit reason is not available in
kvm/queue.