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Diffstat (limited to 'arch/arm64/kvm/arm.c')
-rw-r--r--arch/arm64/kvm/arm.c95
1 files changed, 56 insertions, 39 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 94d33e296e10..9c5573bc4614 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -37,6 +37,7 @@
#include <asm/kvm_arm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmu.h>
+#include <asm/kvm_pkvm.h>
#include <asm/kvm_emulate.h>
#include <asm/sections.h>
@@ -50,7 +51,6 @@ DEFINE_STATIC_KEY_FALSE(kvm_protected_mode_initialized);
DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector);
DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
-unsigned long kvm_arm_hyp_percpu_base[NR_CPUS];
DECLARE_KVM_NVHE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
static bool vgic_present;
@@ -138,24 +138,24 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
int ret;
- ret = kvm_arm_setup_stage2(kvm, type);
- if (ret)
- return ret;
-
- ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu);
+ ret = kvm_share_hyp(kvm, kvm + 1);
if (ret)
return ret;
- ret = kvm_share_hyp(kvm, kvm + 1);
+ ret = pkvm_init_host_vm(kvm);
if (ret)
- goto out_free_stage2_pgd;
+ goto err_unshare_kvm;
if (!zalloc_cpumask_var(&kvm->arch.supported_cpus, GFP_KERNEL)) {
ret = -ENOMEM;
- goto out_free_stage2_pgd;
+ goto err_unshare_kvm;
}
cpumask_copy(kvm->arch.supported_cpus, cpu_possible_mask);
+ ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu, type);
+ if (ret)
+ goto err_free_cpumask;
+
kvm_vgic_early_init(kvm);
/* The maximum number of VCPUs is limited by the host's GIC model */
@@ -164,9 +164,18 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
set_default_spectre(kvm);
kvm_arm_init_hypercalls(kvm);
- return ret;
-out_free_stage2_pgd:
- kvm_free_stage2_pgd(&kvm->arch.mmu);
+ /*
+ * Initialise the default PMUver before there is a chance to
+ * create an actual PMU.
+ */
+ kvm->arch.dfr0_pmuver.imp = kvm_arm_pmu_get_pmuver_limit();
+
+ return 0;
+
+err_free_cpumask:
+ free_cpumask_var(kvm->arch.supported_cpus);
+err_unshare_kvm:
+ kvm_unshare_hyp(kvm, kvm + 1);
return ret;
}
@@ -187,6 +196,9 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvm_vgic_destroy(kvm);
+ if (is_protected_kvm_enabled())
+ pkvm_destroy_hyp_vm(kvm);
+
kvm_destroy_vcpus(kvm);
kvm_unshare_hyp(kvm, kvm + 1);
@@ -569,6 +581,12 @@ int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
if (ret)
return ret;
+ if (is_protected_kvm_enabled()) {
+ ret = pkvm_create_hyp_vm(kvm);
+ if (ret)
+ return ret;
+ }
+
if (!irqchip_in_kernel(kvm)) {
/*
* Tell the rest of the code that there are userspace irqchip
@@ -746,6 +764,9 @@ static int check_vcpu_requests(struct kvm_vcpu *vcpu)
if (kvm_check_request(KVM_REQ_SUSPEND, vcpu))
return kvm_vcpu_suspend(vcpu);
+
+ if (kvm_dirty_ring_check_request(vcpu))
+ return 0;
}
return 1;
@@ -1518,7 +1539,7 @@ static int kvm_init_vector_slots(void)
return 0;
}
-static void cpu_prepare_hyp_mode(int cpu)
+static void cpu_prepare_hyp_mode(int cpu, u32 hyp_va_bits)
{
struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu);
unsigned long tcr;
@@ -1534,23 +1555,9 @@ static void cpu_prepare_hyp_mode(int cpu)
params->mair_el2 = read_sysreg(mair_el1);
- /*
- * The ID map may be configured to use an extended virtual address
- * range. This is only the case if system RAM is out of range for the
- * currently configured page size and VA_BITS, in which case we will
- * also need the extended virtual range for the HYP ID map, or we won't
- * be able to enable the EL2 MMU.
- *
- * However, at EL2, there is only one TTBR register, and we can't switch
- * between translation tables *and* update TCR_EL2.T0SZ at the same
- * time. Bottom line: we need to use the extended range with *both* our
- * translation tables.
- *
- * So use the same T0SZ value we use for the ID map.
- */
tcr = (read_sysreg(tcr_el1) & TCR_EL2_MASK) | TCR_EL2_RES1;
tcr &= ~TCR_T0SZ_MASK;
- tcr |= (idmap_t0sz & GENMASK(TCR_TxSZ_WIDTH - 1, 0)) << TCR_T0SZ_OFFSET;
+ tcr |= TCR_T0SZ(hyp_va_bits);
params->tcr_el2 = tcr;
params->pgd_pa = kvm_mmu_get_httbr();
@@ -1844,13 +1851,13 @@ static void teardown_hyp_mode(void)
free_hyp_pgds();
for_each_possible_cpu(cpu) {
free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
- free_pages(kvm_arm_hyp_percpu_base[cpu], nvhe_percpu_order());
+ free_pages(kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu], nvhe_percpu_order());
}
}
static int do_pkvm_init(u32 hyp_va_bits)
{
- void *per_cpu_base = kvm_ksym_ref(kvm_arm_hyp_percpu_base);
+ void *per_cpu_base = kvm_ksym_ref(kvm_nvhe_sym(kvm_arm_hyp_percpu_base));
int ret;
preempt_disable();
@@ -1870,11 +1877,8 @@ static int do_pkvm_init(u32 hyp_va_bits)
return ret;
}
-static int kvm_hyp_init_protection(u32 hyp_va_bits)
+static void kvm_hyp_init_symbols(void)
{
- void *addr = phys_to_virt(hyp_mem_base);
- int ret;
-
kvm_nvhe_sym(id_aa64pfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
kvm_nvhe_sym(id_aa64pfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1);
kvm_nvhe_sym(id_aa64isar0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR0_EL1);
@@ -1883,6 +1887,14 @@ static int kvm_hyp_init_protection(u32 hyp_va_bits)
kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR2_EL1);
+ kvm_nvhe_sym(__icache_flags) = __icache_flags;
+ kvm_nvhe_sym(kvm_arm_vmid_bits) = kvm_arm_vmid_bits;
+}
+
+static int kvm_hyp_init_protection(u32 hyp_va_bits)
+{
+ void *addr = phys_to_virt(hyp_mem_base);
+ int ret;
ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP);
if (ret)
@@ -1950,7 +1962,7 @@ static int init_hyp_mode(void)
page_addr = page_address(page);
memcpy(page_addr, CHOOSE_NVHE_SYM(__per_cpu_start), nvhe_percpu_size());
- kvm_arm_hyp_percpu_base[cpu] = (unsigned long)page_addr;
+ kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu] = (unsigned long)page_addr;
}
/*
@@ -2043,7 +2055,7 @@ static int init_hyp_mode(void)
}
for_each_possible_cpu(cpu) {
- char *percpu_begin = (char *)kvm_arm_hyp_percpu_base[cpu];
+ char *percpu_begin = (char *)kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu];
char *percpu_end = percpu_begin + nvhe_percpu_size();
/* Map Hyp percpu pages */
@@ -2054,9 +2066,11 @@ static int init_hyp_mode(void)
}
/* Prepare the CPU initialization parameters */
- cpu_prepare_hyp_mode(cpu);
+ cpu_prepare_hyp_mode(cpu, hyp_va_bits);
}
+ kvm_hyp_init_symbols();
+
if (is_protected_kvm_enabled()) {
init_cpu_logical_map();
@@ -2064,9 +2078,7 @@ static int init_hyp_mode(void)
err = -ENODEV;
goto out_err;
}
- }
- if (is_protected_kvm_enabled()) {
err = kvm_hyp_init_protection(hyp_va_bits);
if (err) {
kvm_err("Failed to init hyp memory protection\n");
@@ -2130,6 +2142,11 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
return NULL;
}
+bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
+{
+ return irqchip_in_kernel(kvm);
+}
+
bool kvm_arch_has_irq_bypass(void)
{
return true;
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-15 06:57:17 +0300