8d37b1bdba
- kvm-scsi-adjust-error_prepend-formatting.patch [RHEL-158243] - kvm-scsi-always-send-valid-PREEMPT-TYPE-field.patch [RHEL-158243] - kvm-scsi-register-again-after-PREEMPT-without-reservatio.patch [RHEL-158243] - kvm-accel-mshv-Remove-remap-overlapping-mappings-code.patch [RHEL-177969] - kvm-accel-mshv-implement-cpu_thread_is_idle-hook.patch [RHEL-177969] - Resolves: RHEL-158243 (live migration failed the VM just register key only [rhel-9.9]) - Resolves: RHEL-177969 (MSHV backport onto QEMU 10.1.0 is not able to launch MSHV guests)
59 lines
2.2 KiB
Diff
59 lines
2.2 KiB
Diff
From 4356c4191e1b7ba491a2dd6d8c6167f7eb9a3de1 Mon Sep 17 00:00:00 2001
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From: Magnus Kulke <magnuskulke@linux.microsoft.com>
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Date: Tue, 21 Apr 2026 05:21:54 +0000
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Subject: [PATCH 5/5] accel/mshv: implement cpu_thread_is_idle() hook
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RH-Author: Magnus Kulke <None>
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RH-MergeRequest: 491: accel/mshv: backport required patches for mshv guests
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RH-Jira: RHEL-177969
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Commit: [2/2] 4880ec9edc01fda07186687f9d19159f3afd0689 (mkulke/qemu-kvm)
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In MSHV the hypervisor APIC is always used, so we to implement this hook
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to make sure the AP's vcpu thread is not blocked waiting for an INIT SIPI
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by the BSP. Without this change soft reboots with -smp cpus>=2 will
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hang.
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Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
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Reviewed-by: Mohamed Mediouni <mohamed@unpredictable.fr>
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Link: https://lore.kernel.org/r/20260421-mshv_accel_arm64_supp-v3-9-469f544778ba@linux.microsoft.com
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[Make comment not x86 specific. - Paolo]
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit dbfb680772d5184544f7c0a8bba96bec229c96e6)
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---
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accel/mshv/mshv-all.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/accel/mshv/mshv-all.c b/accel/mshv/mshv-all.c
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index 88b66f2992..d7df89dbd2 100644
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--- a/accel/mshv/mshv-all.c
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+++ b/accel/mshv/mshv-all.c
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@@ -699,11 +699,23 @@ static const TypeInfo mshv_accel_type = {
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.instance_size = sizeof(MshvState),
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};
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+/*
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+ * MSHV manages secondary processors in the hypervisor. SIPI for x86 and
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+ * PSCI for Arm are handled internally. Halted vCPUs must still enter
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+ * mshv_cpu_exec() so that MSHV_RUN_VP is called and the hypervisor will
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+ * wake APs.
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+ */
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+static bool mshv_vcpu_thread_is_idle(CPUState *cpu)
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+{
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+ return false;
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+}
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+
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static void mshv_accel_ops_class_init(ObjectClass *oc, const void *data)
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{
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AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
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ops->create_vcpu_thread = mshv_start_vcpu_thread;
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+ ops->cpu_thread_is_idle = mshv_vcpu_thread_is_idle;
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ops->synchronize_post_init = mshv_cpu_synchronize_post_init;
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ops->synchronize_post_reset = mshv_cpu_synchronize_post_reset;
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ops->synchronize_state = mshv_cpu_synchronize;
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--
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2.52.0
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