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-rw-r--r--hw/arm/virt.c203
1 files changed, 107 insertions, 96 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index ea2413a..ba47728 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -47,8 +47,10 @@
#include "sysemu/numa.h"
#include "sysemu/runstate.h"
#include "sysemu/tpm.h"
+#include "sysemu/tcg.h"
#include "sysemu/kvm.h"
#include "sysemu/hvf.h"
+#include "sysemu/qtest.h"
#include "hw/loader.h"
#include "qapi/error.h"
#include "qemu/bitops.h"
@@ -1343,7 +1345,7 @@ static void create_smmu(const VirtMachineState *vms,
return;
}
- dev = qdev_new("arm-smmuv3");
+ dev = qdev_new(TYPE_ARM_SMMUV3);
object_property_set_link(OBJECT(dev), "primary-bus", OBJECT(bus),
&error_abort);
@@ -1820,6 +1822,84 @@ static void virt_set_memmap(VirtMachineState *vms, int pa_bits)
}
}
+static VirtGICType finalize_gic_version_do(const char *accel_name,
+ VirtGICType gic_version,
+ int gics_supported,
+ unsigned int max_cpus)
+{
+ /* Convert host/max/nosel to GIC version number */
+ switch (gic_version) {
+ case VIRT_GIC_VERSION_HOST:
+ if (!kvm_enabled()) {
+ error_report("gic-version=host requires KVM");
+ exit(1);
+ }
+
+ /* For KVM, gic-version=host means gic-version=max */
+ return finalize_gic_version_do(accel_name, VIRT_GIC_VERSION_MAX,
+ gics_supported, max_cpus);
+ case VIRT_GIC_VERSION_MAX:
+ if (gics_supported & VIRT_GIC_VERSION_4_MASK) {
+ gic_version = VIRT_GIC_VERSION_4;
+ } else if (gics_supported & VIRT_GIC_VERSION_3_MASK) {
+ gic_version = VIRT_GIC_VERSION_3;
+ } else {
+ gic_version = VIRT_GIC_VERSION_2;
+ }
+ break;
+ case VIRT_GIC_VERSION_NOSEL:
+ if ((gics_supported & VIRT_GIC_VERSION_2_MASK) &&
+ max_cpus <= GIC_NCPU) {
+ gic_version = VIRT_GIC_VERSION_2;
+ } else if (gics_supported & VIRT_GIC_VERSION_3_MASK) {
+ /*
+ * in case the host does not support v2 emulation or
+ * the end-user requested more than 8 VCPUs we now default
+ * to v3. In any case defaulting to v2 would be broken.
+ */
+ gic_version = VIRT_GIC_VERSION_3;
+ } else if (max_cpus > GIC_NCPU) {
+ error_report("%s only supports GICv2 emulation but more than 8 "
+ "vcpus are requested", accel_name);
+ exit(1);
+ }
+ break;
+ case VIRT_GIC_VERSION_2:
+ case VIRT_GIC_VERSION_3:
+ case VIRT_GIC_VERSION_4:
+ break;
+ }
+
+ /* Check chosen version is effectively supported */
+ switch (gic_version) {
+ case VIRT_GIC_VERSION_2:
+ if (!(gics_supported & VIRT_GIC_VERSION_2_MASK)) {
+ error_report("%s does not support GICv2 emulation", accel_name);
+ exit(1);
+ }
+ break;
+ case VIRT_GIC_VERSION_3:
+ if (!(gics_supported & VIRT_GIC_VERSION_3_MASK)) {
+ error_report("%s does not support GICv3 emulation", accel_name);
+ exit(1);
+ }
+ break;
+ case VIRT_GIC_VERSION_4:
+ if (!(gics_supported & VIRT_GIC_VERSION_4_MASK)) {
+ error_report("%s does not support GICv4 emulation, is virtualization=on?",
+ accel_name);
+ exit(1);
+ }
+ break;
+ default:
+ error_report("logic error in finalize_gic_version");
+ exit(1);
+ break;
+ }
+
+ return gic_version;
+}
+
/*
* finalize_gic_version - Determines the final gic_version
* according to the gic-version property
@@ -1828,118 +1908,49 @@ static void virt_set_memmap(VirtMachineState *vms, int pa_bits)
*/
static void finalize_gic_version(VirtMachineState *vms)
{
+ const char *accel_name = current_accel_name();
unsigned int max_cpus = MACHINE(vms)->smp.max_cpus;
+ int gics_supported = 0;
- if (kvm_enabled()) {
- int probe_bitmap;
-
- if (!kvm_irqchip_in_kernel()) {
- switch (vms->gic_version) {
- case VIRT_GIC_VERSION_HOST:
- warn_report(
- "gic-version=host not relevant with kernel-irqchip=off "
- "as only userspace GICv2 is supported. Using v2 ...");
- return;
- case VIRT_GIC_VERSION_MAX:
- case VIRT_GIC_VERSION_NOSEL:
- vms->gic_version = VIRT_GIC_VERSION_2;
- return;
- case VIRT_GIC_VERSION_2:
- return;
- case VIRT_GIC_VERSION_3:
- error_report(
- "gic-version=3 is not supported with kernel-irqchip=off");
- exit(1);
- case VIRT_GIC_VERSION_4:
- error_report(
- "gic-version=4 is not supported with kernel-irqchip=off");
- exit(1);
- }
- }
+ /* Determine which GIC versions the current environment supports */
+ if (kvm_enabled() && kvm_irqchip_in_kernel()) {
+ int probe_bitmap = kvm_arm_vgic_probe();
- probe_bitmap = kvm_arm_vgic_probe();
if (!probe_bitmap) {
error_report("Unable to determine GIC version supported by host");
exit(1);
}
- switch (vms->gic_version) {
- case VIRT_GIC_VERSION_HOST:
- case VIRT_GIC_VERSION_MAX:
- if (probe_bitmap & KVM_ARM_VGIC_V3) {
- vms->gic_version = VIRT_GIC_VERSION_3;
- } else {
- vms->gic_version = VIRT_GIC_VERSION_2;
- }
- return;
- case VIRT_GIC_VERSION_NOSEL:
- if ((probe_bitmap & KVM_ARM_VGIC_V2) && max_cpus <= GIC_NCPU) {
- vms->gic_version = VIRT_GIC_VERSION_2;
- } else if (probe_bitmap & KVM_ARM_VGIC_V3) {
- /*
- * in case the host does not support v2 in-kernel emulation or
- * the end-user requested more than 8 VCPUs we now default
- * to v3. In any case defaulting to v2 would be broken.
- */
- vms->gic_version = VIRT_GIC_VERSION_3;
- } else if (max_cpus > GIC_NCPU) {
- error_report("host only supports in-kernel GICv2 emulation "
- "but more than 8 vcpus are requested");
- exit(1);
- }
- break;
- case VIRT_GIC_VERSION_2:
- case VIRT_GIC_VERSION_3:
- break;
- case VIRT_GIC_VERSION_4:
- error_report("gic-version=4 is not supported with KVM");
- exit(1);
+ if (probe_bitmap & KVM_ARM_VGIC_V2) {
+ gics_supported |= VIRT_GIC_VERSION_2_MASK;
}
-
- /* Check chosen version is effectively supported by the host */
- if (vms->gic_version == VIRT_GIC_VERSION_2 &&
- !(probe_bitmap & KVM_ARM_VGIC_V2)) {
- error_report("host does not support in-kernel GICv2 emulation");
- exit(1);
- } else if (vms->gic_version == VIRT_GIC_VERSION_3 &&
- !(probe_bitmap & KVM_ARM_VGIC_V3)) {
- error_report("host does not support in-kernel GICv3 emulation");
- exit(1);
+ if (probe_bitmap & KVM_ARM_VGIC_V3) {
+ gics_supported |= VIRT_GIC_VERSION_3_MASK;
}
- return;
- }
-
- /* TCG mode */
- switch (vms->gic_version) {
- case VIRT_GIC_VERSION_NOSEL:
- vms->gic_version = VIRT_GIC_VERSION_2;
- break;
- case VIRT_GIC_VERSION_MAX:
+ } else if (kvm_enabled() && !kvm_irqchip_in_kernel()) {
+ /* KVM w/o kernel irqchip can only deal with GICv2 */
+ gics_supported |= VIRT_GIC_VERSION_2_MASK;
+ accel_name = "KVM with kernel-irqchip=off";
+ } else if (tcg_enabled() || hvf_enabled() || qtest_enabled()) {
+ gics_supported |= VIRT_GIC_VERSION_2_MASK;
if (module_object_class_by_name("arm-gicv3")) {
- /* CONFIG_ARM_GICV3_TCG was set */
+ gics_supported |= VIRT_GIC_VERSION_3_MASK;
if (vms->virt) {
/* GICv4 only makes sense if CPU has EL2 */
- vms->gic_version = VIRT_GIC_VERSION_4;
- } else {
- vms->gic_version = VIRT_GIC_VERSION_3;
+ gics_supported |= VIRT_GIC_VERSION_4_MASK;
}
- } else {
- vms->gic_version = VIRT_GIC_VERSION_2;
}
- break;
- case VIRT_GIC_VERSION_HOST:
- error_report("gic-version=host requires KVM");
+ } else {
+ error_report("Unsupported accelerator, can not determine GIC support");
exit(1);
- case VIRT_GIC_VERSION_4:
- if (!vms->virt) {
- error_report("gic-version=4 requires virtualization enabled");
- exit(1);
- }
- break;
- case VIRT_GIC_VERSION_2:
- case VIRT_GIC_VERSION_3:
- break;
}
+
+ /*
+ * Then convert helpers like host/max to concrete GIC versions and ensure
+ * the desired version is supported
+ */
+ vms->gic_version = finalize_gic_version_do(accel_name, vms->gic_version,
+ gics_supported, max_cpus);
}
/*
generated by cgit v1.1 at 2024-12-24 02:08:12 +0000