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| author | Paul Mackerras <paulus@ozlabs.org> | 2017-08-25 11:52:12 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2017-08-31 04:36:44 +0200 |
| commit | a4faf2e77a565432278430deaaba2f3295b6a2df (patch) | |
| tree | f96031bb8a27ddab4a71daf97d25975437812c22 /include/uapi | |
| parent | KVM: PPC: Book3S HV: Fix invalid use of register expression (diff) | |
| download | linux-a4faf2e77a565432278430deaaba2f3295b6a2df.tar.xz linux-a4faf2e77a565432278430deaaba2f3295b6a2df.zip | |
KVM: PPC: Book3S HV: Fix case where HDEC is treated as 32-bit on POWER9
Commit 2f2724630f7a ("KVM: PPC: Book3S HV: Cope with host using large
decrementer mode", 2017-05-22) added code to treat the hypervisor
decrementer (HDEC) as a 64-bit value on POWER9 rather than 32-bit.
Unfortunately, that commit missed one place where HDEC is treated
as a 32-bit value. This fixes it.
This bug should not have any user-visible consequences that I can
think of, beyond an occasional unnecessary exit to the host kernel.
If the hypervisor decrementer has gone negative, then the bottom
32 bits will be negative for about 4 seconds after that, so as
long as we get out of the guest within those 4 seconds we won't
conclude that the HDEC interrupt is spurious.
Reported-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Fixes: 2f2724630f7a ("KVM: PPC: Book3S HV: Cope with host using large decrementer mode")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'include/uapi')
0 files changed, 0 insertions, 0 deletions