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Diffstat (limited to 'results/scraper/launchpad-without-comments/1879646')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1879646 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1879646 b/results/scraper/launchpad-without-comments/1879646 new file mode 100644 index 000000000..6bc3e61e3 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1879646 @@ -0,0 +1,30 @@ +[Feature request] x86: dump MSR features in human form + +QEMU might fail because host/guest cpu features are not properly configured: + +qemu-system-x86_64: error: failed to set MSR 0x48f to 0x7fefff00036dfb +qemu-system-x86_64: /root/qemu-master/target/i386/kvm.c:2695: +kvm_buf_set_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. + +To ease debugging, it the MSR features bit could be dumped. + +Example in this thread: + +https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg05593.html + + The high 32 bits are 0111 1111 1110 1111 1111 1111. + + The low 32 bits are 0000 0011 0110 1101 1111 1011. + + The features that are set are the xor, so 0111 1100 1000 0010 0000 0100: + + - bit 2, vmx-exit-nosave-debugctl + - bit 9, host address space size, is handled automatically by QEMU + - bit 15, vmx-exit-ack-intr + - bit 17, vmx-exit-save-pat + - bit 18, vmx-exit-load-pat + - bit 19, vmx-exit-save-efer + - bit 20, vmx-exit-load-efer + - bit 21, vmx-exit-save-preemption-timer + +This output ^^^ is easier to digest. \ No newline at end of file |