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Re: [PATCH 1/2] kvm: replace fprintf with error_report() in kvm_init() f


From: Ani Sinha
Subject: Re: [PATCH 1/2] kvm: replace fprintf with error_report() in kvm_init() for error conditions
Date: Fri, 9 Aug 2024 10:33:23 +0530

On Fri, Aug 9, 2024 at 10:23 AM Ani Sinha <anisinha@redhat.com> wrote:
>
> error_report() is more appropriate for error situations. Replace fprintf with
> error_report. Cosmetic. No functional change.
>
> CC: qemu-trivial@nongnu.org
> CC: zhao1.liu@intel.com
> Signed-off-by: Ani Sinha <anisinha@redhat.com>
> ---
>  accel/kvm/kvm-all.c | 42 +++++++++++++++++++-----------------------
>  1 file changed, 19 insertions(+), 23 deletions(-)
>
> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index 75d11a07b2..899b5264e3 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -2427,7 +2427,7 @@ static int kvm_init(MachineState *ms)
>      QLIST_INIT(&s->kvm_parked_vcpus);
>      s->fd = qemu_open_old(s->device ?: "/dev/kvm", O_RDWR);
>      if (s->fd == -1) {
> -        fprintf(stderr, "Could not access KVM kernel module: %m\n");
> +        error_report("Could not access KVM kernel module: %m");
>          ret = -errno;
>          goto err;
>      }
> @@ -2437,13 +2437,13 @@ static int kvm_init(MachineState *ms)
>          if (ret >= 0) {
>              ret = -EINVAL;
>          }
> -        fprintf(stderr, "kvm version too old\n");
> +        error_report("kvm version too old");
>          goto err;
>      }
>
>      if (ret > KVM_API_VERSION) {
>          ret = -EINVAL;
> -        fprintf(stderr, "kvm version not supported\n");
> +        error_report("kvm version not supported");
>          goto err;
>      }
>
> @@ -2488,30 +2488,26 @@ static int kvm_init(MachineState *ms)
>      } while (ret == -EINTR);
>
>      if (ret < 0) {
> -        fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
> -                strerror(-ret));
> +        error_report("ioctl(KVM_CREATE_VM) failed: %d %s", -ret,
> +                    strerror(-ret));
>
>  #ifdef TARGET_S390X
>          if (ret == -EINVAL) {
> -            fprintf(stderr,
> -                    "Host kernel setup problem detected. Please verify:\n");
> -            fprintf(stderr, "- for kernels supporting the switch_amode or"
> -                    " user_mode parameters, whether\n");
> -            fprintf(stderr,
> -                    "  user space is running in primary address space\n");
> -            fprintf(stderr,
> -                    "- for kernels supporting the vm.allocate_pgste sysctl, "
> -                    "whether it is enabled\n");
> +            error_report("Host kernel setup problem detected. Please 
> verify:");
> +            error_report("- for kernels supporting the switch_amode or"
> +                        " user_mode parameters, whether");
> +            error_report("  user space is running in primary address space");
> +            error_report("- for kernels supporting the vm.allocate_pgste "
> +                        "sysctl, whether it is enabled");
>          }
>  #elif defined(TARGET_PPC)
>          if (ret == -EINVAL) {
> -            fprintf(stderr,
> -                    "PPC KVM module is not loaded. Try modprobe kvm_%s.\n",
> -                    (type == 2) ? "pr" : "hv");
> +            error_report("PPC KVM module is not loaded. Try modprobe 
> kvm_%s.",
> +                        (type == 2) ? "pr" : "hv");
>          }
>  #endif
> -        goto err;
>      }
> +        goto err;

Sorry, this is a bug. I will resend.

>
>      s->vmfd = ret;
>
> @@ -2526,9 +2522,9 @@ static int kvm_init(MachineState *ms)
>                          nc->name, nc->num, soft_vcpus_limit);
>
>              if (nc->num > hard_vcpus_limit) {
> -                fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
> -                        "the maximum cpus supported by KVM (%d)\n",
> -                        nc->name, nc->num, hard_vcpus_limit);
> +                error_report("Number of %s cpus requested (%d) exceeds "
> +                             "the maximum cpus supported by KVM (%d)",
> +                             nc->name, nc->num, hard_vcpus_limit);
>                  exit(1);
>              }
>          }
> @@ -2542,8 +2538,8 @@ static int kvm_init(MachineState *ms)
>      }
>      if (missing_cap) {
>          ret = -EINVAL;
> -        fprintf(stderr, "kvm does not support %s\n%s",
> -                missing_cap->name, upgrade_note);
> +        error_report("kvm does not support %s", missing_cap->name);
> +        error_report("%s", upgrade_note);
>          goto err;
>      }
>
> --
> 2.45.2
>




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