Revision 9855d8ce41a7801548a05d844db2f46c3e810166 authored by Stefan Bader on 22 January 2013, 12:37:21 UTC, committed by Rafael J. Wysocki on 22 January 2013, 12:37:21 UTC
To fix incorrect P-state frequencies which can happen on some AMD systems f594065faf4f9067c2283a34619fc0714e79a98d "ACPI: Add fixups for AMD P-state figures" introduced a quirk to obtain the correct values by reading from AMD specific MSRs. This did cause a regression when running a kernel using that quirk under Xen which does (currently) not pass through MSR reads to the HW. Instead the guest gets a 0 in return. And this seems to cause a failure to initialize the ondemand governour (hard to say for sure as all P-states appear to run at the same frequency). While this should also be fixed in the hypervisor (to allow a guest to read that MSR), this patch is intended to work around the issue in the meantime. In discussion it turned out that indeed real HW/BIOSes may choose to not set the valid bit and thus mark the P-state as invalid. So this could be considered a fix for broken BIOSes that also works around the issue on Xen. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Cc: 3.7+ <stable@vger.kernel.org> Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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| File | Mode | Size |
|---|---|---|
| blocklayout | ||
| objlayout | ||
| Kconfig | -rw-r--r-- | 5.1 KB |
| Makefile | -rw-r--r-- | 1.1 KB |
| cache_lib.c | -rw-r--r-- | 3.9 KB |
| cache_lib.h | -rw-r--r-- | 1.1 KB |
| callback.c | -rw-r--r-- | 11.6 KB |
| callback.h | -rw-r--r-- | 5.2 KB |
| callback_proc.c | -rw-r--r-- | 15.3 KB |
| callback_xdr.c | -rw-r--r-- | 25.0 KB |
| client.c | -rw-r--r-- | 36.9 KB |
| delegation.c | -rw-r--r-- | 18.4 KB |
| delegation.h | -rw-r--r-- | 2.4 KB |
| dir.c | -rw-r--r-- | 55.9 KB |
| direct.c | -rw-r--r-- | 27.8 KB |
| dns_resolve.c | -rw-r--r-- | 9.6 KB |
| dns_resolve.h | -rw-r--r-- | 812 bytes |
| file.c | -rw-r--r-- | 24.6 KB |
| fscache-index.c | -rw-r--r-- | 9.3 KB |
| fscache.c | -rw-r--r-- | 13.8 KB |
| fscache.h | -rw-r--r-- | 6.8 KB |
| getroot.c | -rw-r--r-- | 3.5 KB |
| idmap.c | -rw-r--r-- | 21.4 KB |
| inode.c | -rw-r--r-- | 48.4 KB |
| internal.h | -rw-r--r-- | 18.7 KB |
| iostat.h | -rw-r--r-- | 1.6 KB |
| mount_clnt.c | -rw-r--r-- | 11.8 KB |
| namespace.c | -rw-r--r-- | 6.9 KB |
| netns.h | -rw-r--r-- | 813 bytes |
| nfs.h | -rw-r--r-- | 993 bytes |
| nfs2super.c | -rw-r--r-- | 569 bytes |
| nfs2xdr.c | -rw-r--r-- | 25.5 KB |
| nfs3acl.c | -rw-r--r-- | 10.2 KB |
| nfs3client.c | -rw-r--r-- | 1.7 KB |
| nfs3proc.c | -rw-r--r-- | 24.2 KB |
| nfs3super.c | -rw-r--r-- | 569 bytes |
| nfs3xdr.c | -rw-r--r-- | 54.3 KB |
| nfs4_fs.h | -rw-r--r-- | 13.9 KB |
| nfs4client.c | -rw-r--r-- | 23.2 KB |
| nfs4file.c | -rw-r--r-- | 3.1 KB |
| nfs4filelayout.c | -rw-r--r-- | 36.0 KB |
| nfs4filelayout.h | -rw-r--r-- | 4.7 KB |
| nfs4filelayoutdev.c | -rw-r--r-- | 20.1 KB |
| nfs4getroot.c | -rw-r--r-- | 1.2 KB |
| nfs4namespace.c | -rw-r--r-- | 9.2 KB |
| nfs4proc.c | -rw-r--r-- | 181.2 KB |
| nfs4renewd.c | -rw-r--r-- | 4.1 KB |
| nfs4session.c | -rw-r--r-- | 14.4 KB |
| nfs4session.h | -rw-r--r-- | 3.9 KB |
| nfs4state.c | -rw-r--r-- | 57.4 KB |
| nfs4super.c | -rw-r--r-- | 8.6 KB |
| nfs4sysctl.c | -rw-r--r-- | 1.4 KB |
| nfs4xdr.c | -rw-r--r-- | 189.4 KB |
| nfsroot.c | -rw-r--r-- | 9.5 KB |
| pagelist.c | -rw-r--r-- | 12.0 KB |
| pnfs.c | -rw-r--r-- | 46.7 KB |
| pnfs.h | -rw-r--r-- | 15.6 KB |
| pnfs_dev.c | -rw-r--r-- | 8.0 KB |
| proc.c | -rw-r--r-- | 19.7 KB |
| read.c | -rw-r--r-- | 17.4 KB |
| super.c | -rw-r--r-- | 70.7 KB |
| symlink.c | -rw-r--r-- | 1.6 KB |
| sysctl.c | -rw-r--r-- | 1.2 KB |
| unlink.c | -rw-r--r-- | 14.3 KB |
| write.c | -rw-r--r-- | 48.0 KB |
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