#include <linux/kvm_host.h>
#include <uapi/linux/psci.h>

Include dependency graph for arm_psci.h:

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Macros
#define	KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)

#define	KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)

#define	KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)

#define	KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1)

#define	KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1

Functions
static int	kvm_psci_version (struct kvm_vcpu *vcpu)

int	kvm_psci_call (struct kvm_vcpu *vcpu)

Macro Definition Documentation

◆ KVM_ARM_PSCI_0_1

#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)

Definition at line 13 of file arm_psci.h.

◆ KVM_ARM_PSCI_0_2

#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)

Definition at line 14 of file arm_psci.h.

◆ KVM_ARM_PSCI_1_0

#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0)

Definition at line 15 of file arm_psci.h.

◆ KVM_ARM_PSCI_1_1

#define KVM_ARM_PSCI_1_1 PSCI_VERSION(1, 1)

Definition at line 16 of file arm_psci.h.

◆ KVM_ARM_PSCI_LATEST

#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_1

Definition at line 18 of file arm_psci.h.

Function Documentation

◆ kvm_psci_call()

int kvm_psci_call ( struct kvm_vcpu * vcpu )

kvm_psci_call - handle PSCI call if r0 value is in range @vcpu: Pointer to the VCPU struct

Handle PSCI calls from guests through traps from HVC instructions. The calling convention is similar to SMC calls to the secure world where the function number is placed in r0.

This function returns: > 0 (success), 0 (success but exit to user space), and < 0 (errors)

Errors: -EINVAL: Unrecognized PSCI function

Definition at line 439 of file psci.c.

 {
     u32 psci_fn = smccc_get_function(vcpu);
     int version = kvm_psci_version(vcpu);
     unsigned long val;
  
     val = kvm_psci_check_allowed_function(vcpu, psci_fn);
     if (val) {
         smccc_set_retval(vcpu, val, 0, 0, 0);
         return 1;
     }
  
     switch (version) {
     case KVM_ARM_PSCI_1_1:
         return kvm_psci_1_x_call(vcpu, 1);
     case KVM_ARM_PSCI_1_0:
         return kvm_psci_1_x_call(vcpu, 0);
     case KVM_ARM_PSCI_0_2:
         return kvm_psci_0_2_call(vcpu);
     case KVM_ARM_PSCI_0_1:
         return kvm_psci_0_1_call(vcpu);
     default:
         WARN_ONCE(1, "Unknown PSCI version %d", version);
         smccc_set_retval(vcpu, SMCCC_RET_NOT_SUPPORTED, 0, 0, 0);
         return 1;
     }
 }

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◆ kvm_psci_version()

static int kvm_psci_version ( struct kvm_vcpu * vcpu )

inlinestatic

Definition at line 20 of file arm_psci.h.

 {
     /*
      * Our PSCI implementation stays the same across versions from
      * v0.2 onward, only adding the few mandatory functions (such
      * as FEATURES with 1.0) that are required by newer
      * revisions. It is thus safe to return the latest, unless
      * userspace has instructed us otherwise.
      */
     if (vcpu_has_feature(vcpu, KVM_ARM_VCPU_PSCI_0_2)) {
         if (vcpu->kvm->arch.psci_version)
             return vcpu->kvm->arch.psci_version;
  
         return KVM_ARM_PSCI_LATEST;
     }
  
     return KVM_ARM_PSCI_0_1;
 }