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[Qemu-devel] [PULL 16/22] kvm: add kvm_arm_get_max_vm_ipa_size
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 16/22] kvm: add kvm_arm_get_max_vm_ipa_size |
Date: |
Tue, 5 Mar 2019 16:50:45 +0000 |
From: Eric Auger <address@hidden>
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>
Reviewed-by: Igor Mammedov <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
target/arm/kvm_arm.h | 13 +++++++++++++
target/arm/kvm.c | 10 ++++++++++
2 files changed, 23 insertions(+)
diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
index 6393455b1d0..2a07333c615 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;
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index e00ccf9c987..79a79f01905 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,
--
2.20.1
- [Qemu-devel] [PULL 07/22] target/arm: Rearrange disas_data_proc_reg, (continued)
- [Qemu-devel] [PULL 07/22] target/arm: Rearrange disas_data_proc_reg, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 10/22] target/arm: Restructure handle_fp_1src_{single, double}, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 12/22] hw/arm/boot: introduce fdt_add_memory_node helper, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 13/22] hw/arm/virt: Rename highmem IO regions, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 14/22] hw/arm/virt: Split the memory map description, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 15/22] hw/boards: Add a MachineState parameter to kvm_type callback, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 17/22] vl: Set machine ram_size, maxram_size and ram_slots earlier, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 18/22] hw/arm/virt: Dynamic memory map depending on RAM requirements, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 19/22] hw/arm/virt: Implement kvm_type function for 4.0 machine, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 20/22] hw/arm/virt: Check the VCPU PA range in TCG mode, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 16/22] kvm: add kvm_arm_get_max_vm_ipa_size,
Peter Maydell <=
- [Qemu-devel] [PULL 22/22] hw/arm/stellaris: Implement watchdog timer, Peter Maydell, 2019/03/05
- [Qemu-devel] [PULL 21/22] hw/arm/virt: Bump the 255GB initial RAM limit, Peter Maydell, 2019/03/05
- Re: [Qemu-devel] [PULL 00/22] target-arm queue, Peter Maydell, 2019/03/05