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13989b65eb
The math registers will be saved into vcpu->arch.fp/vr and corresponding vcpu->arch.fp_tm/vr_tm area. We flush or giveup the math regs into vcpu->arch.fp/vr before saving transaction. After transaction is restored, the math regs will be loaded back into regs. If there is a FP/VEC/VSX unavailable exception during transaction active state, the math checkpoint content might be incorrect and we need to do treclaim./load the correct checkpoint val/trechkpt. sequence to retry the transaction. That will make our solution complicated. To solve this issue, we always make the hardware guest MSR math bits (shadow_msr) consistent with the MSR val which guest sees (kvmppc_get_msr()) when guest msr is with tm enabled. Then all FP/VEC/VSX unavailable exception can be delivered to guest and guest handles the exception by itself. Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.