On 2021-01-25 at 10:39, Greg Kroah-Hartman wrote:
From: Andy Lutomirski
commit 67de8dca50c027ca0fa3b62a488ee5035036a0da upstream.
The default kernel_fpu_begin() doesn't work on systems that support XMM but
haven't yet enabled CR4.OSFXSR. This causes crashes when _mmx_memcpy() is
called too
From: Andy Lutomirski
commit 67de8dca50c027ca0fa3b62a488ee5035036a0da upstream.
The default kernel_fpu_begin() doesn't work on systems that support XMM but
haven't yet enabled CR4.OSFXSR. This causes crashes when _mmx_memcpy() is
called too early because LDMXCSR generates #UD when the
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