https://wiki.stoney-cloud.org/w/index.php?action=history&feed=atom&title=Workaround_unhandled_rdmsr%2Fwrmsr 2026-04-14T22:28:48Z Revision history for this page on the wiki MediaWiki 1.39.6 https://wiki.stoney-cloud.org/w/index.php?title=Workaround_unhandled_rdmsr/wrmsr&diff=1087&oldid=prev 2013-09-01T06:36:05Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:36, 1 September 2013</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Since we use &lt;code&gt;cpu mode=&#039;host-model&#039;&lt;/code&gt; the guest kernel is probing for different CPU registers. Some of the registers are not (yet) implemented in Qemu/KVM and therefore generate the following warnings in the hosts kernel log when booting <del style="font-weight: bold; text-decoration: none;">the </del>VM:</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Since we use &lt;code&gt;cpu mode=&#039;host-model&#039;&lt;/code&gt; the guest kernel is probing for different CPU registers. Some of the registers are not (yet) implemented in Qemu/KVM and therefore generate the following warnings in the hosts kernel log when booting <ins style="font-weight: bold; text-decoration: none;">a </ins>VM:</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">&lt;pre&gt;</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.462538] kvm [30681]: vcpu0 unhandled rdmsr: 0x345</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465315] kvm_set_msr_common: 22 callbacks suppressed</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465318] kvm [30681]: vcpu0 unhandled wrmsr: 0x680 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465321] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c0 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465323] kvm [30681]: vcpu0 unhandled wrmsr: 0x681 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465325] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c1 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465328] kvm [30681]: vcpu0 unhandled wrmsr: 0x682 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465330] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c2 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465332] kvm [30681]: vcpu0 unhandled wrmsr: 0x683 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465334] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c3 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465336] kvm [30681]: vcpu0 unhandled wrmsr: 0x684 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[72699.465339] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c4 data 0</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">&lt;/pre&gt;</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">  [72699.462538] kvm [30681]: vcpu0 unhandled rdmsr: 0x345</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">  [72699.465315] kvm_set_msr_common: 22 callbacks suppressed  [72699.465318] kvm [30681]: vcpu0 unhandled wrmsr: 0x680 data 0  [72699.465321] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c0 data 0  [72699.465323] kvm [30681]: vcpu0 unhandled wrmsr: 0x681 data 0  [72699.465325] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c1 data 0  [72699.465328] kvm [30681]: vcpu0 unhandled wrmsr: 0x682 data 0  [72699.465330] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c2 data 0  [72699.465332] kvm [30681]: vcpu0 unhandled wrmsr: 0x683 data 0  [72699.465334] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c3 data 0  [72699.465336] kvm [30681]: vcpu0 unhandled wrmsr: 0x684 data 0  [72699.465339] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c4 data 0</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This is not an issue, see for example: https://bugs.launchpad.net/qemu/+bug/1208540</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This is not an issue, see for example: https://bugs.launchpad.net/qemu/+bug/1208540</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If the warnings should be suppressed, use:&lt;source lang=&#039;bash&#039;&gt;echo 1 &gt; /sys/module/kvm/parameters/ignore_msrs</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>If the warnings should be suppressed, use:&lt;source lang=&#039;bash&#039;&gt;echo 1 &gt; /sys/module/kvm/parameters/ignore_msrs</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/source&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/source&gt;</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Workarounds]]</ins></div></td></tr> </table>

Tiziano https://wiki.stoney-cloud.org/w/index.php?title=Workaround_unhandled_rdmsr/wrmsr&diff=1086&oldid=prev 2013-09-01T06:34:20Z

<p>Created page with &quot;Since we use &lt;code&gt;cpu mode=&#039;host-model&#039;&lt;/code&gt; the guest kernel is probing for different CPU registers. Some of the registers are not (yet) implemented in Qemu/KVM and theref...&quot;</p> <p><b>New page</b></p><div>Since we use &lt;code&gt;cpu mode=&#039;host-model&#039;&lt;/code&gt; the guest kernel is probing for different CPU registers. Some of the registers are not (yet) implemented in Qemu/KVM and therefore generate the following warnings in the hosts kernel log when booting the VM:<br /> <br /> [72699.462538] kvm [30681]: vcpu0 unhandled rdmsr: 0x345<br /> [72699.465315] kvm_set_msr_common: 22 callbacks suppressed [72699.465318] kvm [30681]: vcpu0 unhandled wrmsr: 0x680 data 0 [72699.465321] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c0 data 0 [72699.465323] kvm [30681]: vcpu0 unhandled wrmsr: 0x681 data 0 [72699.465325] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c1 data 0 [72699.465328] kvm [30681]: vcpu0 unhandled wrmsr: 0x682 data 0 [72699.465330] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c2 data 0 [72699.465332] kvm [30681]: vcpu0 unhandled wrmsr: 0x683 data 0 [72699.465334] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c3 data 0 [72699.465336] kvm [30681]: vcpu0 unhandled wrmsr: 0x684 data 0 [72699.465339] kvm [30681]: vcpu0 unhandled wrmsr: 0x6c4 data 0<br /> This is not an issue, see for example: https://bugs.launchpad.net/qemu/+bug/1208540<br /> If the warnings should be suppressed, use:&lt;source lang=&#039;bash&#039;&gt;echo 1 &gt; /sys/module/kvm/parameters/ignore_msrs<br /> &lt;/source&gt;</div>

Tiziano