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Fix included in qemu-kvm-rhev-2.1.0-5.el7
reproduce this bug with unfix version: qemu-kvm-rhev-2.1.0-4.el7.x86_64 use command : /usr/libexec/qemu-kvm -cpu SandyBridge,+oooo,enforce result: guest can boot,qemu-kvm-rhev not quit and outputs the following info: (qemu) CPU feature oooo not found so, this bug is reproduced. verify with version : qemu-kvm-rhev-2.1.2-4.el7.x86_64 steps: intel linux guest: 1.boot guest with /usr/libexec/qemu-kvm -cpu SandyBridge,+oooo,enforce 2.boot guest with /usr/libexec/qemu-kvm -cpu SandyBridge,+adx,enforce result: 1.qemu-kvm-rhev quit and outputs the following info: (qemu) qemu-kvm: CPU feature oooo not found 2.qemu-kvm-rhev quit and outputs the following info: (qemu) warning: host doesn't support requested feature: CPUID.07H:EBX.adx [bit 19] qemu-kvm: Host doesn't support requested features AMD linux guest: 1.boot guest with /usr/libexec/qemu-kvm -cpu Opteron_G2,+oooo,enforce 2.boot guest with /usr/libexec/qemu-kvm -cpu Opteron_G2,+tbm,enforce result: 1.qemu-kvm-rhev quit and outputs the following info: (qemu) qemu-kvm: CPU feature oooo not found 2.qemu-kvm-rhev quit and outputs the following info: (qemu) warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2] warning: host doesn't support requested feature: CPUID.80000001H:ECX.tbm [bit 21] qemu-kvm: Host doesn't support requested features according to above test result. this bug is fixed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2015-0624.html