mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
8a14849b4a
So far, we configured the world-switch by having a small array of pointers to the save and restore functions, depending on the GIC used on the platform. Loading these values each time is a bit silly (they never change), and it makes sense to rely on the instruction patching instead. This leads to a nice cleanup of the code. Acked-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
235 lines
6.6 KiB
C
235 lines
6.6 KiB
C
/*
|
|
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
|
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __ARM_KVM_HOST_H__
|
|
#define __ARM_KVM_HOST_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kvm_types.h>
|
|
#include <asm/kvm.h>
|
|
#include <asm/kvm_asm.h>
|
|
#include <asm/kvm_mmio.h>
|
|
#include <asm/fpstate.h>
|
|
#include <kvm/arm_arch_timer.h>
|
|
|
|
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
|
|
|
|
#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
|
|
#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
|
|
#else
|
|
#define KVM_MAX_VCPUS 0
|
|
#endif
|
|
|
|
#define KVM_USER_MEM_SLOTS 32
|
|
#define KVM_PRIVATE_MEM_SLOTS 4
|
|
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
|
|
#define KVM_HAVE_ONE_REG
|
|
|
|
#define KVM_VCPU_MAX_FEATURES 2
|
|
|
|
#include <kvm/arm_vgic.h>
|
|
|
|
u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
|
|
int __attribute_const__ kvm_target_cpu(void);
|
|
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
|
|
void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
|
|
|
|
struct kvm_arch {
|
|
/* VTTBR value associated with below pgd and vmid */
|
|
u64 vttbr;
|
|
|
|
/* Timer */
|
|
struct arch_timer_kvm timer;
|
|
|
|
/*
|
|
* Anything that is not used directly from assembly code goes
|
|
* here.
|
|
*/
|
|
|
|
/* The VMID generation used for the virt. memory system */
|
|
u64 vmid_gen;
|
|
u32 vmid;
|
|
|
|
/* Stage-2 page table */
|
|
pgd_t *pgd;
|
|
|
|
/* Interrupt controller */
|
|
struct vgic_dist vgic;
|
|
int max_vcpus;
|
|
};
|
|
|
|
#define KVM_NR_MEM_OBJS 40
|
|
|
|
/*
|
|
* We don't want allocation failures within the mmu code, so we preallocate
|
|
* enough memory for a single page fault in a cache.
|
|
*/
|
|
struct kvm_mmu_memory_cache {
|
|
int nobjs;
|
|
void *objects[KVM_NR_MEM_OBJS];
|
|
};
|
|
|
|
struct kvm_vcpu_fault_info {
|
|
u32 hsr; /* Hyp Syndrome Register */
|
|
u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
|
|
u32 hpfar; /* Hyp IPA Fault Address Register */
|
|
u32 hyp_pc; /* PC when exception was taken from Hyp mode */
|
|
};
|
|
|
|
typedef struct vfp_hard_struct kvm_cpu_context_t;
|
|
|
|
struct kvm_vcpu_arch {
|
|
struct kvm_regs regs;
|
|
|
|
int target; /* Processor target */
|
|
DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
|
|
|
|
/* System control coprocessor (cp15) */
|
|
u32 cp15[NR_CP15_REGS];
|
|
|
|
/* The CPU type we expose to the VM */
|
|
u32 midr;
|
|
|
|
/* HYP trapping configuration */
|
|
u32 hcr;
|
|
|
|
/* Interrupt related fields */
|
|
u32 irq_lines; /* IRQ and FIQ levels */
|
|
|
|
/* Exception Information */
|
|
struct kvm_vcpu_fault_info fault;
|
|
|
|
/* Floating point registers (VFP and Advanced SIMD/NEON) */
|
|
struct vfp_hard_struct vfp_guest;
|
|
|
|
/* Host FP context */
|
|
kvm_cpu_context_t *host_cpu_context;
|
|
|
|
/* VGIC state */
|
|
struct vgic_cpu vgic_cpu;
|
|
struct arch_timer_cpu timer_cpu;
|
|
|
|
/*
|
|
* Anything that is not used directly from assembly code goes
|
|
* here.
|
|
*/
|
|
|
|
/* Don't run the guest on this vcpu */
|
|
bool pause;
|
|
|
|
/* IO related fields */
|
|
struct kvm_decode mmio_decode;
|
|
|
|
/* Cache some mmu pages needed inside spinlock regions */
|
|
struct kvm_mmu_memory_cache mmu_page_cache;
|
|
|
|
/* Detect first run of a vcpu */
|
|
bool has_run_once;
|
|
};
|
|
|
|
struct kvm_vm_stat {
|
|
u32 remote_tlb_flush;
|
|
};
|
|
|
|
struct kvm_vcpu_stat {
|
|
u32 halt_successful_poll;
|
|
u32 halt_wakeup;
|
|
};
|
|
|
|
int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
|
|
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
|
|
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
|
|
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
|
|
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
|
|
u64 kvm_call_hyp(void *hypfn, ...);
|
|
void force_vm_exit(const cpumask_t *mask);
|
|
|
|
#define KVM_ARCH_WANT_MMU_NOTIFIER
|
|
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
|
|
int kvm_unmap_hva_range(struct kvm *kvm,
|
|
unsigned long start, unsigned long end);
|
|
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
|
|
|
|
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
|
|
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
|
|
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
|
|
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
|
|
|
|
/* We do not have shadow page tables, hence the empty hooks */
|
|
static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
|
|
unsigned long address)
|
|
{
|
|
}
|
|
|
|
struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
|
|
struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
|
|
|
|
int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
|
|
unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
|
|
int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
|
|
int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
|
|
|
|
int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
|
|
int exception_index);
|
|
|
|
static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
|
|
phys_addr_t pgd_ptr,
|
|
unsigned long hyp_stack_ptr,
|
|
unsigned long vector_ptr)
|
|
{
|
|
/*
|
|
* Call initialization code, and switch to the full blown HYP
|
|
* code. The init code doesn't need to preserve these
|
|
* registers as r0-r3 are already callee saved according to
|
|
* the AAPCS.
|
|
* Note that we slightly misuse the prototype by casing the
|
|
* stack pointer to a void *.
|
|
*
|
|
* We don't have enough registers to perform the full init in
|
|
* one go. Install the boot PGD first, and then install the
|
|
* runtime PGD, stack pointer and vectors. The PGDs are always
|
|
* passed as the third argument, in order to be passed into
|
|
* r2-r3 to the init code (yes, this is compliant with the
|
|
* PCS!).
|
|
*/
|
|
|
|
kvm_call_hyp(NULL, 0, boot_pgd_ptr);
|
|
|
|
kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
|
|
}
|
|
|
|
static inline int kvm_arch_dev_ioctl_check_extension(long ext)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int kvm_perf_init(void);
|
|
int kvm_perf_teardown(void);
|
|
|
|
void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
|
|
|
|
struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
|
|
|
|
static inline void kvm_arch_hardware_disable(void) {}
|
|
static inline void kvm_arch_hardware_unsetup(void) {}
|
|
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
|
|
static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
|
|
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
|
|
|
|
#endif /* __ARM_KVM_HOST_H__ */
|