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[Qemu-devel] [PATCH 2/3] S390: Tell user why VM creation failed
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 2/3] S390: Tell user why VM creation failed |
Date: |
Wed, 24 Mar 2010 18:30:39 +0100 |
The KVM kernel module on S390 refuses to create a VM when the switch_amode
kernel parameter is not used.
Since that is not exactly obvious, let's give the user a nice warning.
Signed-off-by: Alexander Graf <address@hidden>
---
kvm-all.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 534ead0..acf7e31 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -609,8 +609,13 @@ int kvm_init(int smp_cpus)
}
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
- if (s->vmfd < 0)
+ if (s->vmfd < 0) {
+#ifdef TARGET_S390X
+ fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
+ "your host kernel command line\n");
+#endif
goto err;
+ }
/* initially, KVM allocated its own memory and we had to jump through
* hooks to make phys_ram_base point to this. Modern versions of KVM
--
1.6.0.2