Commit a27382e2 authored by Eric Auger's avatar Eric Auger Committed by Peter Maydell
Browse files

kvm: add kvm_arm_get_max_vm_ipa_size 



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: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarIgor Mammedov <imammedo@redhat.com>
Message-id: 20190304101339.25970-6-eric.auger@redhat.com
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent dc0ca80e

target/arm/kvm.c

+10 −0
Original line number Diff line number Diff line
@@ -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,

target/arm/kvm_arm.h

+13 −0
Original line number Diff line number Diff line
@@ -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;