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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-14 13:25:52 (GMT) |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-14 14:39:52 (GMT) |
| commit | b10d92a54dac25a6152f1aa1ffc95c12908035ce (patch) | |
| tree | a3b91faba082c51fcd49319ef355e3783494b832 /arch/frv | |
| parent | 25188b9986cf6b0cadcf1bc1d1693a2e9c50ed47 (diff) | |
| download | linux-b10d92a54dac25a6152f1aa1ffc95c12908035ce.tar.xz | |
KVM: x86: fix RSM into 64-bit protected mode
In order to get into 64-bit protected mode, you need to enable
paging while EFER.LMA=1. For this to work, CS.L must be 0.
Currently, we load the segments before CR0 and CR4, which means
that if RSM returns into 64-bit protected mode CS.L is already 1
and everything breaks.
Luckily, CS.L=0 is always the case when executing RSM, because it
is forbidden to execute RSM from 64-bit protected mode. Hence it
is enough to load CR0 and CR4 first, and only then the segments.
Fixes: 660a5d517aaab9187f93854425c4c63f4a09195c
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/frv')
0 files changed, 0 insertions, 0 deletions