KVM: arm64: vgic-its: Introduce new KVM ITS device

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

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 237d5d82f0afd6f1749a12f46872dc5170b2c3c6..fb4661cf896ecdb5558b5c29fd3d2fe732356178 100644 (file)
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -20,6 +20,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/kvm_host.h>
+#include <linux/list.h>
 #include <linux/module.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
@@ -122,7 +123,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
        if (ret)
                goto out_fail_alloc;
 
-       ret = create_hyp_mappings(kvm, kvm + 1);
+       ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP);
        if (ret)
                goto out_free_stage2_pgd;
 
@@ -201,7 +202,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
                r = KVM_MAX_VCPUS;
                break;
        default:
-               r = kvm_arch_dev_ioctl_check_extension(ext);
+               r = kvm_arch_dev_ioctl_check_extension(kvm, ext);
                break;
        }
        return r;
@@ -239,7 +240,7 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
        if (err)
                goto free_vcpu;
 
-       err = create_hyp_mappings(vcpu, vcpu + 1);
+       err = create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP);
        if (err)
                goto vcpu_uninit;
 
@@ -376,7 +377,7 @@ void force_vm_exit(const cpumask_t *mask)
 
 /**
  * need_new_vmid_gen - check that the VMID is still valid
- * @kvm: The VM's VMID to checkt
+ * @kvm: The VM's VMID to check
  *
  * return true if there is a new generation of VMIDs being used
  *
@@ -455,7 +456,7 @@ static void update_vttbr(struct kvm *kvm)
 static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
 {
        struct kvm *kvm = vcpu->kvm;
-       int ret;
+       int ret = 0;
 
        if (likely(vcpu->arch.has_run_once))
                return 0;
@@ -478,9 +479,9 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
         * interrupts from the virtual timer with a userspace gic.
         */
        if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))
-               kvm_timer_enable(kvm);
+               ret = kvm_timer_enable(vcpu);
 
-       return 0;
+       return ret;
 }
 
 bool kvm_arch_intc_initialized(struct kvm *kvm)
@@ -488,30 +489,37 @@ bool kvm_arch_intc_initialized(struct kvm *kvm)
        return vgic_initialized(kvm);
 }
 
-static void kvm_arm_halt_guest(struct kvm *kvm) __maybe_unused;
-static void kvm_arm_resume_guest(struct kvm *kvm) __maybe_unused;
-
-static void kvm_arm_halt_guest(struct kvm *kvm)
+void kvm_arm_halt_guest(struct kvm *kvm)
 {
        int i;
        struct kvm_vcpu *vcpu;
 
        kvm_for_each_vcpu(i, vcpu, kvm)
                vcpu->arch.pause = true;
-       force_vm_exit(cpu_all_mask);
+       kvm_make_all_cpus_request(kvm, KVM_REQ_VCPU_EXIT);
+}
+
+void kvm_arm_halt_vcpu(struct kvm_vcpu *vcpu)
+{
+       vcpu->arch.pause = true;
+       kvm_vcpu_kick(vcpu);
 }
 
-static void kvm_arm_resume_guest(struct kvm *kvm)
+void kvm_arm_resume_vcpu(struct kvm_vcpu *vcpu)
+{
+       struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu);
+
+       vcpu->arch.pause = false;
+       swake_up(wq);
+}
+
+void kvm_arm_resume_guest(struct kvm *kvm)
 {
        int i;
        struct kvm_vcpu *vcpu;
 
-       kvm_for_each_vcpu(i, vcpu, kvm) {
-               struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu);
-
-               vcpu->arch.pause = false;
-               swake_up(wq);
-       }
+       kvm_for_each_vcpu(i, vcpu, kvm)
+               kvm_arm_resume_vcpu(vcpu);
 }
 
 static void vcpu_sleep(struct kvm_vcpu *vcpu)
@@ -1031,7 +1039,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
 
 static void cpu_init_hyp_mode(void *dummy)
 {
-       phys_addr_t boot_pgd_ptr;
        phys_addr_t pgd_ptr;
        unsigned long hyp_stack_ptr;
        unsigned long stack_page;
@@ -1040,13 +1047,12 @@ static void cpu_init_hyp_mode(void *dummy)
        /* Switch from the HYP stub to our own HYP init vector */
        __hyp_set_vectors(kvm_get_idmap_vector());
 
-       boot_pgd_ptr = kvm_mmu_get_boot_httbr();
        pgd_ptr = kvm_mmu_get_httbr();
        stack_page = __this_cpu_read(kvm_arm_hyp_stack_page);
        hyp_stack_ptr = stack_page + PAGE_SIZE;
        vector_ptr = (unsigned long)kvm_ksym_ref(__kvm_hyp_vector);
 
-       __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr);
+       __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr);
        __cpu_init_stage2();
 
        kvm_arm_init_debug();
@@ -1068,15 +1074,9 @@ static void cpu_hyp_reinit(void)
 
 static void cpu_hyp_reset(void)
 {
-       phys_addr_t boot_pgd_ptr;
-       phys_addr_t phys_idmap_start;
-
-       if (!is_kernel_in_hyp_mode()) {
-               boot_pgd_ptr = kvm_mmu_get_boot_httbr();
-               phys_idmap_start = kvm_get_idmap_start();
-
-               __cpu_reset_hyp_mode(boot_pgd_ptr, phys_idmap_start);
-       }
+       if (!is_kernel_in_hyp_mode())
+               __cpu_reset_hyp_mode(hyp_default_vectors,
+                                    kvm_get_idmap_start());
 }
 
 static void _kvm_arch_hardware_enable(void *discard)
@@ -1286,14 +1286,14 @@ static int init_hyp_mode(void)
         * Map the Hyp-code called directly from the host
         */
        err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start),
-                                 kvm_ksym_ref(__hyp_text_end));
+                                 kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC);
        if (err) {
                kvm_err("Cannot map world-switch code\n");
                goto out_err;
        }
 
        err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
-                                 kvm_ksym_ref(__end_rodata));
+                                 kvm_ksym_ref(__end_rodata), PAGE_HYP_RO);
        if (err) {
                kvm_err("Cannot map rodata section\n");
                goto out_err;
@@ -1304,7 +1304,8 @@ static int init_hyp_mode(void)
         */
        for_each_possible_cpu(cpu) {
                char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
-               err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE);
+               err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE,
+                                         PAGE_HYP);
 
                if (err) {
                        kvm_err("Cannot map hyp stack\n");
@@ -1316,7 +1317,7 @@ static int init_hyp_mode(void)
                kvm_cpu_context_t *cpu_ctxt;
 
                cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu);
-               err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1);
+               err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP);
 
                if (err) {
                        kvm_err("Cannot map host CPU state: %d\n", err);
@@ -1324,10 +1325,6 @@ static int init_hyp_mode(void)
                }
        }
 
-#ifndef CONFIG_HOTPLUG_CPU
-       free_boot_hyp_pgd();
-#endif
-
        /* set size of VMID supported by CPU */
        kvm_vmid_bits = kvm_get_vmid_bits();
        kvm_info("%d-bit VMID\n", kvm_vmid_bits);