located at /usr/share/kvm/cpu-flags-understood-$arch
This file can be read by qemu-server's "query_understood_cpu_flags"
function, avoiding a more expensive call to QEMU.
For now, only x86_64 is implemented, since aarch64 doesn't print any flags when
called this way.
Signed-off-by: Stefan Reiter <s.rei...@proxmox.com>
---
v5: check for empty file
debian/rules | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/debian/rules b/debian/rules
index 8f428c7..bc43ade 100755
--- a/debian/rules
+++ b/debian/rules
@@ -21,6 +21,8 @@ ARCH ?= $(shell dpkg-architecture -qDEB_HOST_GNU_CPU)
PACKAGE=pve-qemu-kvm
destdir := $(CURDIR)/debian/$(PACKAGE)
+flagfile := $(destdir)/usr/share/kvm/cpu-flags-understood-x86_64
+
CFLAGS = -Wall
ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
@@ -128,6 +130,18 @@ install: build
rm -Rf $(destdir)/usr/include
rm -Rf $(destdir)/usr/lib*
+ # write files for understood CPU flags, since these are static for every
+ # version (saves a QEMU call in qemu-server at runtime)
+ $(destdir)/usr/bin/qemu-system-x86_64 -cpu help \
+ | perl -0777 -pe ' \
+ s/^.*Recognized CPUID flags://s; # remove up to flags \
+ s/\n{2,}.*$$//s; # remove any trailing text \
+ s/\s{2,}|\n/\s/g; # remove unnecessary whitespace \
+ ' > $(flagfile)
+
+ # check that file is not empty
+ [ -s $(flagfile) ]
+
# Build architecture-independent files here.
binary-indep: build install
# We have nothing to do by default.
--
2.20.1
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