arm/arm64: KVM: Map the BSS at HYP

[cascardo/linux.git] / arch / arm / kvm / arm.c

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index c94b90d..08bb84f 100644 (file)
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -144,6 +144,16 @@ out_fail_alloc:
        return ret;
 }
 
+bool kvm_arch_has_vcpu_debugfs(void)
+{
+       return false;
+}
+
+int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
+{
+       return 0;
+}
+
 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 {
        return VM_FAULT_SIGBUS;
@@ -1176,6 +1186,10 @@ static int init_common_resources(void)
                return -ENOMEM;
        }
 
+       /* set size of VMID supported by CPU */
+       kvm_vmid_bits = kvm_get_vmid_bits();
+       kvm_info("%d-bit VMID\n", kvm_vmid_bits);
+
        return 0;
 }
 
@@ -1241,10 +1255,6 @@ static void teardown_hyp_mode(void)
 
 static int init_vhe_mode(void)
 {
-       /* set size of VMID supported by CPU */
-       kvm_vmid_bits = kvm_get_vmid_bits();
-       kvm_info("%d-bit VMID\n", kvm_vmid_bits);
-
        kvm_info("VHE mode initialized successfully\n");
        return 0;
 }
@@ -1302,6 +1312,13 @@ static int init_hyp_mode(void)
                goto out_err;
        }
 
+       err = create_hyp_mappings(kvm_ksym_ref(__bss_start),
+                                 kvm_ksym_ref(__bss_stop), PAGE_HYP_RO);
+       if (err) {
+               kvm_err("Cannot map bss section\n");
+               goto out_err;
+       }
+
        /*
         * Map the Hyp stack pages
         */
@@ -1328,10 +1345,6 @@ static int init_hyp_mode(void)
                }
        }
 
-       /* set size of VMID supported by CPU */
-       kvm_vmid_bits = kvm_get_vmid_bits();
-       kvm_info("%d-bit VMID\n", kvm_vmid_bits);
-
        kvm_info("Hyp mode initialized successfully\n");
 
        return 0;