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[PATCH v3 11/28] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUI
From: |
David Woodhouse |
Subject: |
[PATCH v3 11/28] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID |
Date: |
Wed, 25 Oct 2023 15:50:25 +0100 |
From: David Woodhouse <dwmw@amazon.co.uk>
This will allow Linux guests (since v6.0) to use the per-vCPU upcall
vector delivered as MSI through the local APIC.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
---
target/i386/kvm/kvm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index e7c054cc16..8f93a0b5fc 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1889,6 +1889,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
c->eax |= XEN_HVM_CPUID_VCPU_ID_PRESENT;
c->ebx = cs->cpu_index;
}
+
+ if (cs->kvm_state->xen_version >= XEN_VERSION(4, 17)) {
+ c->eax |= XEN_HVM_CPUID_UPCALL_VECTOR;
+ }
}
r = kvm_xen_init_vcpu(cs);
--
2.40.1
- Re: [PATCH v3 06/28] hw/xen: take iothread mutex in xen_evtchn_reset_op(), (continued)
- [PATCH v3 08/28] i386/xen: Ignore VCPU_SSHOTTMR_future flag in set_singleshot_timer(), David Woodhouse, 2023/10/25
- [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, David Woodhouse, 2023/10/25
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, Durrant, Paul, 2023/10/27
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, David Woodhouse, 2023/10/27
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, Durrant, Paul, 2023/10/27
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, David Woodhouse, 2023/10/27
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, Durrant, Paul, 2023/10/27
- Re: [PATCH v3 13/28] hw/xen: automatically assign device index to block devices, David Woodhouse, 2023/10/27
[PATCH v3 11/28] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID,
David Woodhouse <=
[PATCH v3 05/28] hw/xen: fix XenStore watch delivery to guest, David Woodhouse, 2023/10/25
[PATCH v3 16/28] hw/xen: update Xen console to XenDevice model, David Woodhouse, 2023/10/25
[PATCH v3 03/28] hw/xen: select kernel mode for per-vCPU event channel upcall vector, David Woodhouse, 2023/10/25
[PATCH v3 24/28] net: add qemu_create_nic_bus_devices(), David Woodhouse, 2023/10/25
[PATCH v3 19/28] hw/xen: update Xen PV NIC to XenDevice model, David Woodhouse, 2023/10/25
[PATCH v3 21/28] xen-platform: unplug AHCI disks, David Woodhouse, 2023/10/25