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[Qemu-devel] [PATCH v3 13/13] pc: require IRQ remapping and EIM if there
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH v3 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs |
Date: |
Thu, 13 Oct 2016 11:52:47 +0200 |
it would prevent starting guest with incorrect configs
where interrupts couldn't be delivered to CPUs with
APIC IDs > 254.
Signed-off-by: Igor Mammedov <address@hidden>
---
hw/i386/pc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 40eb43b..f7070e0 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -68,6 +68,7 @@
#include "qapi-visit.h"
#include "qom/cpu.h"
#include "hw/nmi.h"
+#include "hw/i386/intel_iommu.h"
/* debug PC/ISA interrupts */
//#define DEBUG_IRQ
@@ -1264,6 +1265,18 @@ void pc_machine_done(Notifier *notifier, void *data)
sizeof(pcms->boot_cpus_le));
}
}
+
+ if (pcms->apic_id_limit > 255) {
+ IntelIOMMUState *iommu = INTEL_IOMMU_DEVICE(x86_iommu_get_default());
+
+ if (!iommu || !iommu->x86_iommu.intr_supported ||
+ iommu->intr_eim != ON_OFF_AUTO_ON) {
+ error_report("current -smp configuration requires "
+ "Extended Interrupt Mode enabled. "
+ "IOMMU should have eim=on option set");
+ exit(EXIT_FAILURE);
+ }
+ }
}
void pc_guest_info_init(PCMachineState *pcms)
--
2.7.4
- [Qemu-devel] [PATCH v3 09/13] pc: kvm_apic: pass APIC ID depending on xAPIC/x2APIC mode, (continued)
[Qemu-devel] [PATCH v3 10/13] pc: clarify FW_CFG_MAX_CPUS usage comment, Igor Mammedov, 2016/10/13
[Qemu-devel] [PATCH v3 11/13] increase MAX_CPUMASK_BITS from 255 to 288, Igor Mammedov, 2016/10/13
[Qemu-devel] [PATCH v3 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs,
Igor Mammedov <=
- Re: [Qemu-devel] [PATCH v3 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Radim Krčmář, 2016/10/13
- [Qemu-devel] [PATCH v4 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Igor Mammedov, 2016/10/14
- Re: [Qemu-devel] [PATCH v4 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Eduardo Habkost, 2016/10/18
- Re: [Qemu-devel] [PATCH v4 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Igor Mammedov, 2016/10/18
- Re: [Qemu-devel] [PATCH v4 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Eduardo Habkost, 2016/10/18
- Re: [Qemu-devel] [PATCH v4 13/13] pc: require IRQ remapping and EIM if there could be x2APIC CPUs, Igor Mammedov, 2016/10/18
[Qemu-devel] [PATCH v3 12/13] pc: add 'etc/boot-cpus' fw_cfg file for machine with more than 255 CPUs, Igor Mammedov, 2016/10/13
Re: [Qemu-devel] [PATCH v3 00/13] pc: q35: x2APIC support in kvm_apic mode, Paolo Bonzini, 2016/10/13