[ kvm-Bugs-2905358 ] Doesn't support MS-DOS compatibility FPU mode

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Bugs item #2905358, was opened at 2009-11-28 16:37
Message generated for change (Comment added) made by jessorensen
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https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2905358&group_id=180599

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Category: None
Group: None
>Status: Closed
>Resolution: Later
Priority: 5
Private: No
Submitted By: Samuel Thibault (youpi_486)
Assigned to: Nobody/Anonymous (nobody)
Summary: Doesn't support MS-DOS compatibility FPU mode

Initial Comment:
Hello,

Apparently, KVM always enables CR0_NE, i.e. FPU errors are always
reported via the EXCP10_COPR exception rather than via the FPU
interrupt. This breaks operating systems which assume MS-DOS
compatability mode, i.e. exceptions are always reported via the FPU
interrupt (like GNU Mach).

Samuel


----------------------------------------------------------------------

>Comment By: Jes Sorensen (jessorensen)
Date: 2010-11-29 17:17

Message:
Hi,

I checked with Avi, this is still not supported but patches are welcome,
so I have opened an RFE in bugzilla.kernel.org and migrated the bug there:

https://bugzilla.kernel.org/show_bug.cgi?id=23992

Please use the bugzilla thread for further discussions of this problem.

Thanks,
Jes


----------------------------------------------------------------------

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