linux

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Gautam Menghani 86abaf9d6c KVM: PPC: Book3S HV nestedv2: Fix doorbell emulation

commit 54ec2bd9e0173b75daf84675d07c56584f96564b upstream.

Doorbell emulation is broken for KVM on PAPR guests as support for DPDES
was not added in the initial patch series. Due to this, a KVM on PAPR
guest with SMT > 1 cannot be booted with the XICS interrupt controller
as doorbells are setup in the initial probe path when using XICS
(pSeries_smp_probe()).

Command to replicate the above bug:

qemu-system-ppc64 \
	-drive file=rhel.qcow2,format=qcow2 \
	-m 20G \
	-smp 8,cores=1,threads=8 \
	-cpu  host \
	-nographic \
	-machine pseries,ic-mode=xics -accel kvm

Add doorbell state handling support in the host KVM code to fix doorbell
emulation.

Fixes: 19d31c5f1157 ("KVM: PPC: Add support for nestedv2 guests")
Cc: stable@vger.kernel.org # v6.7+
Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240605113913.83715-3-gautam@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-08-03 09:00:41 +02:00

alpha

mseal: wire up mseal syscall

2024-05-23 19:40:26 -07:00

arc

bpf-for-netdev

2024-05-27 16:26:30 -07:00

arm

ARM: Remove address checking for MMUless devices

2024-08-03 08:59:30 +02:00

arm64

bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG