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Diffstat (limited to 'arch/arm/kvm/arm.c')
-rw-r--r--arch/arm/kvm/arm.c194
1 files changed, 4 insertions, 190 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 842098d78f5..a0dfc2a53f9 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -30,11 +30,9 @@
#define CREATE_TRACE_POINTS
#include "trace.h"
-#include <asm/unified.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
#include <asm/mman.h>
-#include <asm/cputype.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <asm/virt.h>
@@ -44,14 +42,13 @@
#include <asm/kvm_emulate.h>
#include <asm/kvm_coproc.h>
#include <asm/kvm_psci.h>
-#include <asm/opcodes.h>
#ifdef REQUIRES_VIRT
__asm__(".arch_extension virt");
#endif
static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
-static struct vfp_hard_struct __percpu *kvm_host_vfp_state;
+static kvm_kernel_vfp_t __percpu *kvm_host_vfp_state;
static unsigned long hyp_default_vectors;
/* Per-CPU variable containing the currently running vcpu. */
@@ -304,22 +301,6 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
return 0;
}
-int __attribute_const__ kvm_target_cpu(void)
-{
- unsigned long implementor = read_cpuid_implementor();
- unsigned long part_number = read_cpuid_part_number();
-
- if (implementor != ARM_CPU_IMP_ARM)
- return -EINVAL;
-
- switch (part_number) {
- case ARM_CPU_PART_CORTEX_A15:
- return KVM_ARM_TARGET_CORTEX_A15;
- default:
- return -EINVAL;
- }
-}
-
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
int ret;
@@ -482,163 +463,6 @@ static void update_vttbr(struct kvm *kvm)
spin_unlock(&kvm_vmid_lock);
}
-static int handle_svc_hyp(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- /* SVC called from Hyp mode should never get here */
- kvm_debug("SVC called from Hyp mode shouldn't go here\n");
- BUG();
- return -EINVAL; /* Squash warning */
-}
-
-static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- trace_kvm_hvc(*vcpu_pc(vcpu), *vcpu_reg(vcpu, 0),
- vcpu->arch.hsr & HSR_HVC_IMM_MASK);
-
- if (kvm_psci_call(vcpu))
- return 1;
-
- kvm_inject_undefined(vcpu);
- return 1;
-}
-
-static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- if (kvm_psci_call(vcpu))
- return 1;
-
- kvm_inject_undefined(vcpu);
- return 1;
-}
-
-static int handle_pabt_hyp(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- /* The hypervisor should never cause aborts */
- kvm_err("Prefetch Abort taken from Hyp mode at %#08x (HSR: %#08x)\n",
- vcpu->arch.hxfar, vcpu->arch.hsr);
- return -EFAULT;
-}
-
-static int handle_dabt_hyp(struct kvm_vcpu *vcpu, struct kvm_run *run)
-{
- /* This is either an error in the ws. code or an external abort */
- kvm_err("Data Abort taken from Hyp mode at %#08x (HSR: %#08x)\n",
- vcpu->arch.hxfar, vcpu->arch.hsr);
- return -EFAULT;
-}
-
-typedef int (*exit_handle_fn)(struct kvm_vcpu *, struct kvm_run *);
-static exit_handle_fn arm_exit_handlers[] = {
- [HSR_EC_WFI] = kvm_handle_wfi,
- [HSR_EC_CP15_32] = kvm_handle_cp15_32,
- [HSR_EC_CP15_64] = kvm_handle_cp15_64,
- [HSR_EC_CP14_MR] = kvm_handle_cp14_access,
- [HSR_EC_CP14_LS] = kvm_handle_cp14_load_store,
- [HSR_EC_CP14_64] = kvm_handle_cp14_access,
- [HSR_EC_CP_0_13] = kvm_handle_cp_0_13_access,
- [HSR_EC_CP10_ID] = kvm_handle_cp10_id,
- [HSR_EC_SVC_HYP] = handle_svc_hyp,
- [HSR_EC_HVC] = handle_hvc,
- [HSR_EC_SMC] = handle_smc,
- [HSR_EC_IABT] = kvm_handle_guest_abort,
- [HSR_EC_IABT_HYP] = handle_pabt_hyp,
- [HSR_EC_DABT] = kvm_handle_guest_abort,
- [HSR_EC_DABT_HYP] = handle_dabt_hyp,
-};
-
-/*
- * A conditional instruction is allowed to trap, even though it
- * wouldn't be executed. So let's re-implement the hardware, in
- * software!
- */
-static bool kvm_condition_valid(struct kvm_vcpu *vcpu)
-{
- unsigned long cpsr, cond, insn;
-
- /*
- * Exception Code 0 can only happen if we set HCR.TGE to 1, to
- * catch undefined instructions, and then we won't get past
- * the arm_exit_handlers test anyway.
- */
- BUG_ON(((vcpu->arch.hsr & HSR_EC) >> HSR_EC_SHIFT) == 0);
-
- /* Top two bits non-zero? Unconditional. */
- if (vcpu->arch.hsr >> 30)
- return true;
-
- cpsr = *vcpu_cpsr(vcpu);
-
- /* Is condition field valid? */
- if ((vcpu->arch.hsr & HSR_CV) >> HSR_CV_SHIFT)
- cond = (vcpu->arch.hsr & HSR_COND) >> HSR_COND_SHIFT;
- else {
- /* This can happen in Thumb mode: examine IT state. */
- unsigned long it;
-
- it = ((cpsr >> 8) & 0xFC) | ((cpsr >> 25) & 0x3);
-
- /* it == 0 => unconditional. */
- if (it == 0)
- return true;
-
- /* The cond for this insn works out as the top 4 bits. */
- cond = (it >> 4);
- }
-
- /* Shift makes it look like an ARM-mode instruction */
- insn = cond << 28;
- return arm_check_condition(insn, cpsr) != ARM_OPCODE_CONDTEST_FAIL;
-}
-
-/*
- * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on
- * proper exit to QEMU.
- */
-static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
- int exception_index)
-{
- unsigned long hsr_ec;
-
- switch (exception_index) {
- case ARM_EXCEPTION_IRQ:
- return 1;
- case ARM_EXCEPTION_UNDEFINED:
- kvm_err("Undefined exception in Hyp mode at: %#08x\n",
- vcpu->arch.hyp_pc);
- BUG();
- panic("KVM: Hypervisor undefined exception!\n");
- case ARM_EXCEPTION_DATA_ABORT:
- case ARM_EXCEPTION_PREF_ABORT:
- case ARM_EXCEPTION_HVC:
- hsr_ec = (vcpu->arch.hsr & HSR_EC) >> HSR_EC_SHIFT;
-
- if (hsr_ec >= ARRAY_SIZE(arm_exit_handlers)
- || !arm_exit_handlers[hsr_ec]) {
- kvm_err("Unknown exception class: %#08lx, "
- "hsr: %#08x\n", hsr_ec,
- (unsigned int)vcpu->arch.hsr);
- BUG();
- }
-
- /*
- * See ARM ARM B1.14.1: "Hyp traps on instructions
- * that fail their condition code check"
- */
- if (!kvm_condition_valid(vcpu)) {
- bool is_wide = vcpu->arch.hsr & HSR_IL;
- kvm_skip_instr(vcpu, is_wide);
- return 1;
- }
-
- return arm_exit_handlers[hsr_ec](vcpu, run);
- default:
- kvm_pr_unimpl("Unsupported exception type: %d",
- exception_index);
- run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
- return 0;
- }
-}
-
static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
{
if (likely(vcpu->arch.has_run_once))
@@ -973,7 +797,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
static void cpu_init_hyp_mode(void *vector)
{
unsigned long long pgd_ptr;
- unsigned long pgd_low, pgd_high;
unsigned long hyp_stack_ptr;
unsigned long stack_page;
unsigned long vector_ptr;
@@ -982,20 +805,11 @@ static void cpu_init_hyp_mode(void *vector)
__hyp_set_vectors((unsigned long)vector);
pgd_ptr = (unsigned long long)kvm_mmu_get_httbr();
- pgd_low = (pgd_ptr & ((1ULL << 32) - 1));
- pgd_high = (pgd_ptr >> 32ULL);
stack_page = __get_cpu_var(kvm_arm_hyp_stack_page);
hyp_stack_ptr = stack_page + PAGE_SIZE;
vector_ptr = (unsigned long)__kvm_hyp_vector;
- /*
- * Call initialization code, and switch to the full blown
- * HYP code. The init code doesn't need to preserve these registers as
- * r1-r3 and r12 are already callee save according to the AAPCS.
- * Note that we slightly misuse the prototype by casing the pgd_low to
- * a void *.
- */
- kvm_call_hyp((void *)pgd_low, pgd_high, hyp_stack_ptr, vector_ptr);
+ __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr);
}
/**
@@ -1078,7 +892,7 @@ static int init_hyp_mode(void)
/*
* Map the host VFP structures
*/
- kvm_host_vfp_state = alloc_percpu(struct vfp_hard_struct);
+ kvm_host_vfp_state = alloc_percpu(kvm_kernel_vfp_t);
if (!kvm_host_vfp_state) {
err = -ENOMEM;
kvm_err("Cannot allocate host VFP state\n");
@@ -1086,7 +900,7 @@ static int init_hyp_mode(void)
}
for_each_possible_cpu(cpu) {
- struct vfp_hard_struct *vfp;
+ kvm_kernel_vfp_t *vfp;
vfp = per_cpu_ptr(kvm_host_vfp_state, cpu);
err = create_hyp_mappings(vfp, vfp + 1);