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| author | Matt Borgerson <contact@mborgerson.com> | 2023-07-13 00:29:01 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-08-04 11:42:18 +0200 |
| commit | b2ea6450d8e1336a33eb958ccc64604bc35a43dd (patch) | |
| tree | 5c4e49ab60b305c6e9cc8fc8040ecf08b210a970 /tests | |
| parent | c26d005e62f4fd177dae0cd70c24cb96761edebc (diff) | |
| download | qemu-b2ea6450d8e1336a33eb958ccc64604bc35a43dd.zip qemu-b2ea6450d8e1336a33eb958ccc64604bc35a43dd.tar.gz qemu-b2ea6450d8e1336a33eb958ccc64604bc35a43dd.tar.bz2 | |
target/i386: Check CR0.TS before enter_mmx
When CR0.TS=1, execution of x87 FPU, MMX, and some SSE instructions will
cause a Device Not Available (DNA) exception (#NM). System software uses
this exception event to lazily context switch FPU state.
Before this patch, enter_mmx helpers may be generated just before #NM
generation, prematurely resetting FPU state before the guest has a
chance to save it.
Signed-off-by: Matt Borgerson <contact@mborgerson.com>
Message-ID: <CADc=-s5F10muEhLs4f3mxqsEPAHWj0XFfOC2sfFMVHrk9fcpMg@mail.gmail.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tests')
0 files changed, 0 insertions, 0 deletions