summaryrefslogtreecommitdiff
path: root/arch/powerpc/kvm/book3s_rtas.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kvm/book3s_rtas.c')
-rw-r--r--arch/powerpc/kvm/book3s_rtas.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_rtas.c b/arch/powerpc/kvm/book3s_rtas.c
index 7a053157483b..edb14ba992b3 100644
--- a/arch/powerpc/kvm/book3s_rtas.c
+++ b/arch/powerpc/kvm/book3s_rtas.c
@@ -205,6 +205,32 @@ int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp)
return rc;
}
+static void kvmppc_rtas_swap_endian_in(struct rtas_args *args)
+{
+#ifdef __LITTLE_ENDIAN__
+ int i;
+
+ args->token = be32_to_cpu(args->token);
+ args->nargs = be32_to_cpu(args->nargs);
+ args->nret = be32_to_cpu(args->nret);
+ for (i = 0; i < args->nargs; i++)
+ args->args[i] = be32_to_cpu(args->args[i]);
+#endif
+}
+
+static void kvmppc_rtas_swap_endian_out(struct rtas_args *args)
+{
+#ifdef __LITTLE_ENDIAN__
+ int i;
+
+ for (i = 0; i < args->nret; i++)
+ args->args[i] = cpu_to_be32(args->args[i]);
+ args->token = cpu_to_be32(args->token);
+ args->nargs = cpu_to_be32(args->nargs);
+ args->nret = cpu_to_be32(args->nret);
+#endif
+}
+
int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
{
struct rtas_token_definition *d;
@@ -223,6 +249,8 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
if (rc)
goto fail;
+ kvmppc_rtas_swap_endian_in(&args);
+
/*
* args->rets is a pointer into args->args. Now that we've
* copied args we need to fix it up to point into our copy,
@@ -247,6 +275,7 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
if (rc == 0) {
args.rets = orig_rets;
+ kvmppc_rtas_swap_endian_out(&args);
rc = kvm_write_guest(vcpu->kvm, args_phys, &args, sizeof(args));
if (rc)
goto fail;