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Diffstat (limited to 'classification_output/02/instruction/55961334')
| -rw-r--r-- | classification_output/02/instruction/55961334 | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/classification_output/02/instruction/55961334 b/classification_output/02/instruction/55961334 deleted file mode 100644 index 4764ef49f..000000000 --- a/classification_output/02/instruction/55961334 +++ /dev/null @@ -1,40 +0,0 @@ -instruction: 0.803 -semantic: 0.775 -mistranslation: 0.718 -other: 0.715 -boot: 0.569 - -[Bug] "-ht" flag ignored under KVM - guest still reports HT - -Hi Community, -We have observed that the 'ht' feature bit cannot be disabled when QEMU runs -with KVM acceleration. -qemu-system-x86_64 \ - --enable-kvm \ - -machine q35 \ - -cpu host,-ht \ - -smp 4 \ - -m 4G \ - -drive file=rootfs.img,format=raw \ - -nographic \ - -append 'console=ttyS0 root=/dev/sda rw' -Because '-ht' is specified, the guest should expose no HT capability -(cpuid.1.edx[28] = 0), and /proc/cpuinfo shouldn't show HT feature, but we still -saw ht in linux guest when run 'cat /proc/cpuinfo'. -XiaoYao mentioned that: - -It has been the behavior of QEMU since - - commit 400281af34e5ee6aa9f5496b53d8f82c6fef9319 - Author: Andre Przywara <andre.przywara@amd.com> - Date: Wed Aug 19 15:42:42 2009 +0200 - - set CPUID bits to present cores and threads topology - -that we cannot remove HT CPUID bit from guest via "-cpu xxx,-ht" if the -VM has >= 2 vcpus. -I'd like to know whether there's a plan to address this issue, or if the current -behaviour is considered acceptable. -Best regards, -Ewan. - |