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[Qemu-devel] [PATCH for-2.10 v2] kvm: Print MSR information if KVM_{GET,
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PATCH for-2.10 v2] kvm: Print MSR information if KVM_{GET, SET}_MSRS failed |
Date: |
Thu, 9 Mar 2017 16:46:34 -0300 |
When a KVM_{GET,SET}_MSRS ioctl() fails, it is difficult to find
out which MSR caused the problem. Print an error message for
debugging, before we trigger the (ret == cpu->kvm_msr_buf->nmsrs)
assert.
Suggested-by: Dr. David Alan Gilbert <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
Changes v1 -> v2:
* Print error message on KVM_GET_MSRS too
* Suggested-by: Dr. David Alan Gilbert <address@hidden>
---
target/i386/kvm.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 887a81268f..705e971a63 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1807,6 +1807,12 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
return ret;
}
+ if (ret < cpu->kvm_msr_buf->nmsrs) {
+ struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret];
+ error_report("error: failed to set MSR 0x%" PRIx32 " to 0x%" PRIx64,
+ (uint32_t)e->index, (uint64_t)e->data);
+ }
+
assert(ret == cpu->kvm_msr_buf->nmsrs);
return 0;
}
@@ -2172,6 +2178,12 @@ static int kvm_get_msrs(X86CPU *cpu)
return ret;
}
+ if (ret < cpu->kvm_msr_buf->nmsrs) {
+ struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret];
+ error_report("error: failed to get MSR 0x%" PRIx32,
+ (uint32_t)e->index);
+ }
+
assert(ret == cpu->kvm_msr_buf->nmsrs);
/*
* MTRR masks: Each mask consists of 5 parts
--
2.11.0.259.g40922b1
- [Qemu-devel] [PATCH for-2.10 v2] kvm: Print MSR information if KVM_{GET, SET}_MSRS failed,
Eduardo Habkost <=