# HG changeset patch
# User Christian Ehrhardt <[EMAIL PROTECTED]>
# Date 1229005383 -3600
# Node ID d788f32f8f60f3a0d86ab218459089e5186632ca
# Parent f7dc67cd9b74c5d7ad322686e58325f879d93468
[PATCH] qemu: report issues causing the kvm probe to fail
From: Christian Ehrhardt <[EMAIL PROTECTED]>
I ran into the issue of a failign KVM Probe of the qemu configure script three
times this week always needing "set -x", inserting an exit, masking the cleanup
trap and compiling the c file by hand until I knew what the reason is. I think
we could make easier for developers and end users.
Therefore this patch keeps the qemu style configure output which is a list of
"$Feature $Status", but extend the "no" result like "KVM Support no" with some
more information.
There might be a lot of things going wrong with that probe and I don't want
to handle all of them, but if it is one of the known checks e.g. for
KVM_API_VERSION then we could grep/awk that out and report it. The patch
reports in case of a known case in the style
"KVM support no - (Missing KVM capability KVM_CAP_DESTROY_MEMORY_REGION_WORKS)"
In case more than one #error is triggered it creates a comma separated list in
those brackets and in case it is something else than an #error it just reports
plain old "no".
Signed-off-by: Christian Ehrhardt <[EMAIL PROTECTED]>
---
[diffstat]
configure | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)
[diff]
diff --git a/qemu/configure b/qemu/configure
--- a/qemu/configure
+++ b/qemu/configure
@@ -1037,12 +1037,14 @@ if test "$kvm" = "yes" ; then
if test "$kvm" = "yes" ; then
cat > $TMPC <<EOF
#include <linux/kvm.h>
-#if !defined(KVM_API_VERSION) || \
- KVM_API_VERSION < 12 || \
- KVM_API_VERSION > 12 || \
- !defined(KVM_CAP_USER_MEMORY) || \
- !defined(KVM_CAP_SET_TSS_ADDR)
+#if !defined(KVM_API_VERSION) || KVM_API_VERSION < 12 || KVM_API_VERSION > 12
#error Invalid KVM version
+#endif
+#if !defined(KVM_CAP_USER_MEMORY)
+#error Missing KVM capability KVM_CAP_USER_MEMORY
+#endif
+#if !defined(KVM_CAP_SET_TSS_ADDR)
+#error Missing KVM capability KVM_CAP_SET_TSS_ADDR
#endif
int main(void) { return 0; }
EOF
@@ -1055,7 +1057,12 @@ EOF
2>/dev/null ; then
:
else
- kvm="no"
+ kvmprobeerr=`$cc $ARCH_CFLAGS -o $TMPE ${OS_CFLAGS} $kvm_cflags $TMPC 2>&1
| grep "error: #error " | awk --field-separator "error: #error " '{if (NR>1)
printf(", "); printf("%s",$2);}'`
+ if test "$kvmprobeerr" != "" ; then
+ kvm="no - (${kvmprobeerr})"
+ else
+ kvm="no"
+ fi
fi
fi
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