Rajnesh Kanwal 1a4f36397e riscv/kvm: Fix VM hang in case of timer delta being zero. ... [ Upstream commit 6eff380489 ] In case when VCPU is blocked due to WFI, we schedule the timer from `kvm_riscv_vcpu_timer_blocking()` to keep timer interrupt ticking. But in case when delta_ns comes to be zero, we never schedule the timer and VCPU keeps sleeping indefinitely until any activity is done with VM console. This is easily reproduce-able using kvmtool. ./lkvm-static run -c1 --console virtio -p "earlycon root=/dev/vda" \ -k ./Image -d rootfs.ext4 Also, just add a print in kvm_riscv_vcpu_vstimer_expired() to check the interrupt delivery and run `top` or similar auto-upating cmd from guest. Within sometime one can notice that print from timer expiry routine stops and the `top` cmd output will stop updating. This change fixes this by making sure we schedule the timer even with delta_ns being zero to bring the VCPU out of sleep immediately. Fixes: 8f5cb44b1b ("RISC-V: KVM: Support sstc extension") Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-04-06 12:12:31 +02:00
..
boot	riscv: dts: sifive: fu740: fix size of pcie 32bit memory	2023-01-07 19:31:37 +00:00
configs	RISC-V Patches for the 6.2 Merge Window, Part 1	2022-12-14 15:23:49 -08:00
errata	RISC-V: fix taking the text_mutex twice during sifive errata patching	2023-03-17 08:58:03 +01:00
include	riscv: mm: Fix incorrect ASID argument when flushing TLB	2023-03-30 12:51:40 +02:00
kernel	RISC-V: take text_mutex during alternative patching	2023-03-17 08:58:00 +01:00
kvm	riscv/kvm: Fix VM hang in case of timer delta being zero.	2023-04-06 12:12:31 +02:00
lib	riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit	2022-08-10 14:06:31 -07:00
mm	riscv: mm: Fix incorrect ASID argument when flushing TLB	2023-03-30 12:51:40 +02:00
net	riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC	2022-12-06 20:59:27 +01:00
purgatory	riscv/purgatory: Omit use of bin2c	2022-08-11 09:32:34 -07:00
Kbuild	riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild	2022-06-01 22:26:32 -07:00
Kconfig	riscv: Handle zicsr/zifencei issues between clang and binutils	2023-03-30 12:51:40 +02:00
Kconfig.debug
Kconfig.erratas	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
Kconfig.socs	RISC-V Patches for the 6.2 Merge Window, Part 1	2022-12-14 15:23:49 -08:00
Makefile	riscv: Handle zicsr/zifencei issues between clang and binutils	2023-03-30 12:51:40 +02:00