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[Qemu-arm] [PATCH v10 05/10] kvm: add kvm_arm_get_max_vm_ipa_size
From: |
Eric Auger |
Subject: |
[Qemu-arm] [PATCH v10 05/10] kvm: add kvm_arm_get_max_vm_ipa_size |
Date: |
Thu, 28 Feb 2019 16:03:19 +0100 |
Add the kvm_arm_get_max_vm_ipa_size() helper that returns the
number of bits in the IPA address space supported by KVM.
This capability needs to be known to create the VM with a
specific IPA max size (kvm_type passed along KVM_CREATE_VM ioctl.
Signed-off-by: Eric Auger <address@hidden>
---
v6 -> v7:
- s/kvm_arm_get_max_vm_phys_shift/kvm_arm_get_max_vm_ipa_size
- reword the comment
v4 -> v5:
- return 40 if the host does not support the capability
v3 -> v4:
- s/s/ms in kvm_arm_get_max_vm_phys_shift function comment
- check KVM_CAP_ARM_VM_IPA_SIZE extension
v1 -> v2:
- put this in ARM specific code
---
target/arm/kvm.c | 10 ++++++++++
target/arm/kvm_arm.h | 13 +++++++++++++
2 files changed, 23 insertions(+)
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index e00ccf9c98..79a79f0190 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -18,6 +18,7 @@
#include "qemu/error-report.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
+#include "sysemu/kvm_int.h"
#include "kvm_arm.h"
#include "cpu.h"
#include "trace.h"
@@ -162,6 +163,15 @@ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
env->features = arm_host_cpu_features.features;
}
+int kvm_arm_get_max_vm_ipa_size(MachineState *ms)
+{
+ KVMState *s = KVM_STATE(ms->accelerator);
+ int ret;
+
+ ret = kvm_check_extension(s, KVM_CAP_ARM_VM_IPA_SIZE);
+ return ret > 0 ? ret : 40;
+}
+
int kvm_arch_init(MachineState *ms, KVMState *s)
{
/* For ARM interrupt delivery is always asynchronous,
diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
index 6393455b1d..2a07333c61 100644
--- a/target/arm/kvm_arm.h
+++ b/target/arm/kvm_arm.h
@@ -207,6 +207,14 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures
*ahcf);
*/
void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu);
+/**
+ * kvm_arm_get_max_vm_ipa_size - Returns the number of bits in the
+ * IPA address space supported by KVM
+ *
+ * @ms: Machine state handle
+ */
+int kvm_arm_get_max_vm_ipa_size(MachineState *ms);
+
/**
* kvm_arm_sync_mpstate_to_kvm
* @cpu: ARMCPU
@@ -239,6 +247,11 @@ static inline void
kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
cpu->host_cpu_probe_failed = true;
}
+static inline int kvm_arm_get_max_vm_ipa_size(MachineState *ms)
+{
+ return -ENOENT;
+}
+
static inline int kvm_arm_vgic_probe(void)
{
return 0;
--
2.20.1
- [Qemu-arm] [PATCH v10 00/10] ARM virt: Initial RAM expansion and extended memory map, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 02/10] hw/arm/virt: Rename highmem IO regions, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 01/10] hw/arm/boot: introduce fdt_add_memory_node helper, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 04/10] hw/boards: Add a MachineState parameter to kvm_type callback, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 03/10] hw/arm/virt: Split the memory map description, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 06/10] vl: Set machine ram_size, maxram_size and ram_slots earlier, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 05/10] kvm: add kvm_arm_get_max_vm_ipa_size,
Eric Auger <=
- [Qemu-arm] [PATCH v10 07/10] hw/arm/virt: Dynamic memory map depending on RAM requirements, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 08/10] hw/arm/virt: Implement kvm_type function for 4.0 machine, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 10/10] hw/arm/virt: Bump the 255GB initial RAM limit, Eric Auger, 2019/02/28
- [Qemu-arm] [PATCH v10 09/10] hw/arm/virt: Check the VCPU PA range in TCG mode, Eric Auger, 2019/02/28