| Message ID | 20220303053315.1056880-1-npiggin@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: PPC: Book3S HV interrupt fixes | expand |
On Thu, 3 Mar 2022 15:33:09 +1000, Nicholas Piggin wrote: > This series fixes up a bunch of little interrupt issues which were found > by inspection haven't seem to have caused big problems but possibly > could or could cause the occasional latency spike from a temporarily lost > interrupt. > > The big thing is the xive context change. Currently we run an L2 with > its L1's xive OS context pushed. I'm proposing that we instead treat > that as an escalation similar to cede. > > [...] Patches 2-6 applied to powerpc/topic/ppc-kvm. [2/6] KVM: PPC: Book3S HV P9: Inject pending xive interrupts at guest entry https://git.kernel.org/powerpc/c/026728dc5d41f830e8194fe01e432dd4eb9b3d9a [3/6] KVM: PPC: Book3S HV P9: Move cede logic out of XIVE escalation rearming https://git.kernel.org/powerpc/c/ad5ace91c55e7bd16813617f67bcb7619d51a295 [4/6] KVM: PPC: Book3S HV P9: Split !nested case out from guest entry https://git.kernel.org/powerpc/c/42b4a2b347b09e7ee4c86f7121e3b45214b63e69 [5/6] KVM: PPC: Book3S HV Nested: L2 must not run with L1 xive context https://git.kernel.org/powerpc/c/11681b79b1ab52e7625844d7ce52c4d5201a43b2 [6/6] KVM: PPC: Book3S HV Nested: L2 LPCR should inherit L1 LPES setting https://git.kernel.org/powerpc/c/2852ebfa10afdcefff35ec72c8da97141df9845c cheers
This series fixes up a bunch of little interrupt issues which were found by inspection haven't seem to have caused big problems but possibly could or could cause the occasional latency spike from a temporarily lost interrupt. The big thing is the xive context change. Currently we run an L2 with its L1's xive OS context pushed. I'm proposing that we instead treat that as an escalation similar to cede. Thanks, Nick Nicholas Piggin (6): KVM: PPC: Book3S HV P9: Fix "lost kick" race KVM: PPC: Book3S HV P9: Inject pending xive interrupts at guest entry KVM: PPC: Book3S HV P9: Move cede logic out of XIVE escalation rearming KVM: PPC: Book3S HV P9: Split !nested case out from guest entry KVM: PPC: Book3S HV Nested: L2 must not run with L1 xive context KVM: PPC: Book3S HV Nested: L2 LPCR should inherit L1 LPES setting arch/powerpc/include/asm/kvm_ppc.h | 4 +- arch/powerpc/kvm/book3s_hv.c | 97 ++++++++++++++++++++++++----- arch/powerpc/kvm/book3s_hv_nested.c | 3 +- arch/powerpc/kvm/book3s_xive.c | 11 ++-- 4 files changed, 90 insertions(+), 25 deletions(-)