diff options
author | Eric Auger <eric.auger@redhat.com> | 2019-03-04 11:13:37 +0100 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2019-03-05 15:55:09 +0000 |
commit | c9650222b8fda66e5e9e5110a0dc76c3b30eb70a (patch) | |
tree | 232f0fc628bf497461c699e09232887fbadf417c /hw/arm/virt.c | |
parent | 957e32cffa57e2578abbf7c1ec6e84db48921a18 (diff) | |
download | qemu-c9650222b8fda66e5e9e5110a0dc76c3b30eb70a.zip |
hw/arm/virt: Implement kvm_type function for 4.0 machine
This patch implements the machine class kvm_type() callback.
It returns the number of bits requested to implement the whole GPA
range including the RAM and IO regions located beyond.
The returned value is passed though the KVM_CREATE_VM ioctl and
this allows KVM to set the stage2 tables dynamically.
To compute the highest GPA used in the memory map, kvm_type()
must freeze the memory map by calling virt_set_memmap().
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20190304101339.25970-9-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/arm/virt.c')
-rw-r--r-- | hw/arm/virt.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 2e788a0361..3ac6b152f5 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1440,7 +1440,13 @@ static void machvirt_init(MachineState *machine) bool firmware_loaded = bios_name || drive_get(IF_PFLASH, 0, 0); bool aarch64 = true; - virt_set_memmap(vms); + /* + * In accelerated mode, the memory map is computed earlier in kvm_type() + * to create a VM with the right number of IPA bits. + */ + if (!vms->memmap) { + virt_set_memmap(vms); + } /* We can probe only here because during property set * KVM is not available yet @@ -1829,6 +1835,36 @@ static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine, return NULL; } +/* + * for arm64 kvm_type [7-0] encodes the requested number of bits + * in the IPA address space + */ +static int virt_kvm_type(MachineState *ms, const char *type_str) +{ + VirtMachineState *vms = VIRT_MACHINE(ms); + int max_vm_pa_size = kvm_arm_get_max_vm_ipa_size(ms); + int requested_pa_size; + + /* we freeze the memory map to compute the highest gpa */ + virt_set_memmap(vms); + + requested_pa_size = 64 - clz64(vms->highest_gpa); + + if (requested_pa_size > max_vm_pa_size) { + error_report("-m and ,maxmem option values " + "require an IPA range (%d bits) larger than " + "the one supported by the host (%d bits)", + requested_pa_size, max_vm_pa_size); + exit(1); + } + /* + * By default we return 0 which corresponds to an implicit legacy + * 40b IPA setting. Otherwise we return the actual requested PA + * logsize + */ + return requested_pa_size > 40 ? requested_pa_size : 0; +} + static void virt_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); @@ -1853,6 +1889,7 @@ static void virt_machine_class_init(ObjectClass *oc, void *data) mc->cpu_index_to_instance_props = virt_cpu_index_to_props; mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a15"); mc->get_default_cpu_node_id = virt_get_default_cpu_node_id; + mc->kvm_type = virt_kvm_type; assert(!mc->get_hotplug_handler); mc->get_hotplug_handler = virt_machine_get_hotplug_handler; hc->plug = virt_machine_device_plug_cb; |