[PATCH v2 0/3] KVM/arm64: timer fixes for 6.14
Marc Zyngier
maz at kernel.org
Tue Feb 4 03:00:47 PST 2025
It's been recently pointed out that the NV timer code that is
(hopefully) on its way upstream is marginally sub-optimal (read:
terminally broken). This short series attempts to fix things:
- Correctly arm a background timer in all situations
- Avoid corrupting the EL2 state by shoving the EL1 state into it, and
simplify the handling of emulated timers
- Drop the weird HV timer offset dance dance on E2H switch that never
happens and make HV timer correctly UNDEF on E2H==0.
Thanks to Volodymyr Babchuk and Wei-Lin Chang for their help.
Patches on top of kvmarm/fixes, and merged back on top of my
kvm-arm64/nv-next branch.
Marc Zyngier (3):
KVM: arm64: timer: Always evaluate the need for a soft timer
KVM: arm64: timer: Correctly handle EL1 timer emulation when !FEAT_ECV
KVM: arm64: timer: Don't adjust the EL2 virtual timer offset
arch/arm64/kvm/arch_timer.c | 49 +++++++++----------------------------
arch/arm64/kvm/sys_regs.c | 16 +++++++++---
2 files changed, 24 insertions(+), 41 deletions(-)
--
2.39.2
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