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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-05-28 11:07:29 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-10 14:12:12 +0200 |
| commit | 413679e73bdfc2720dc2fa2172b65b7411185fa7 (patch) | |
| tree | 6157e508faebd07186bab68cf7e2187c2fb92a02 /arch/powerpc/kernel/time.c | |
| parent | KVM: PPC: Book3S HV P9: implement kvmppc_xive_pull_vcpu in C (diff) | |
| download | linux-413679e73bdfc2720dc2fa2172b65b7411185fa7.tar.xz linux-413679e73bdfc2720dc2fa2172b65b7411185fa7.zip | |
KVM: PPC: Book3S HV P9: Move setting HDEC after switching to guest LPCR
LPCR[HDICE]=0 suppresses hypervisor decrementer exceptions on some
processors, so it must be enabled before HDEC is set.
Rather than set it in the host LPCR then setting HDEC, move the HDEC
update to after the guest MMU context (including LPCR) is loaded.
There shouldn't be much concern with delaying HDEC by some 10s or 100s
of nanoseconds by setting it a bit later.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210528090752.3542186-10-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/time.c')
0 files changed, 0 insertions, 0 deletions