x86-32: Rework cache flush denied handler

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The cache flush denied error is an erratum on some AMD 486 clones.  If an invd
instruction is executed in userspace, the processor calls exception 19 (13 hex)
instead of #GP (13 decimal).  On cpus where XMM is not supported, redirect
exception 19 to do_general_protection().  Also, remove die_if_kernel(), since
this was the last user.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1269176446-2489-2-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Brian Gerst 2010-03-21 09:00:43 -04:00 • committed by H. Peter Anvin

parent be1066bbcd

commit 40d2e76315

3 changed files with 26 additions and 28 deletions

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4

arch/x86/Kconfig.cpu

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19

arch/x86/kernel/entry_32.S

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31

arch/x86/kernel/traps.c

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