diff options
| author | Marc Zyngier <[email protected]> | 2024-10-23 15:53:14 +0100 |
|---|---|---|
| committer | Oliver Upton <[email protected]> | 2024-10-31 02:42:29 +0000 |
| commit | 164b5e20cdf6038f1b38867d2f6252ec6f10c356 (patch) | |
| tree | 6894bd0f2d469d83a822f07475999655825d4663 /lib/memory-notifier-error-inject.c | |
| parent | dfeb91686992f5a973d09b66ddedf458de1acf08 (diff) | |
KVM: arm64: nv: Handle CNTHCTL_EL2 specially
Accessing CNTHCTL_EL2 is fraught with danger if running with
HCR_EL2.E2H=1: half of the bits are held in CNTKCTL_EL1, and
thus can be changed behind our back, while the rest lives
in the CNTHCTL_EL2 shadow copy that is memory-based.
Yes, this is a lot of fun!
Make sure that we merge the two on read access, while we can
write to CNTKCTL_EL1 in a more straightforward manner.
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Oliver Upton <[email protected]>
Diffstat (limited to 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions