163 lines
5.9 KiB
C
163 lines
5.9 KiB
C
/*
|
|
* Copyright (C) 2015 - ARM Ltd
|
|
* Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __ARM64_KVM_HYP_H__
|
|
#define __ARM64_KVM_HYP_H__
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/kvm_host.h>
|
|
#include <asm/sysreg.h>
|
|
|
|
#define __hyp_text __section(.hyp.text) notrace
|
|
|
|
#define read_sysreg_elx(r,nvh,vh) \
|
|
({ \
|
|
u64 reg; \
|
|
asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##nvh),\
|
|
__mrs_s("%0", r##vh), \
|
|
ARM64_HAS_VIRT_HOST_EXTN) \
|
|
: "=r" (reg)); \
|
|
reg; \
|
|
})
|
|
|
|
#define write_sysreg_elx(v,r,nvh,vh) \
|
|
do { \
|
|
u64 __val = (u64)(v); \
|
|
asm volatile(ALTERNATIVE("msr " __stringify(r##nvh) ", %x0",\
|
|
__msr_s(r##vh, "%x0"), \
|
|
ARM64_HAS_VIRT_HOST_EXTN) \
|
|
: : "rZ" (__val)); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Unified accessors for registers that have a different encoding
|
|
* between VHE and non-VHE. They must be specified without their "ELx"
|
|
* encoding.
|
|
*/
|
|
#define read_sysreg_el2(r) \
|
|
({ \
|
|
u64 reg; \
|
|
asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##_EL2),\
|
|
"mrs %0, " __stringify(r##_EL1),\
|
|
ARM64_HAS_VIRT_HOST_EXTN) \
|
|
: "=r" (reg)); \
|
|
reg; \
|
|
})
|
|
|
|
#define write_sysreg_el2(v,r) \
|
|
do { \
|
|
u64 __val = (u64)(v); \
|
|
asm volatile(ALTERNATIVE("msr " __stringify(r##_EL2) ", %x0",\
|
|
"msr " __stringify(r##_EL1) ", %x0",\
|
|
ARM64_HAS_VIRT_HOST_EXTN) \
|
|
: : "rZ" (__val)); \
|
|
} while (0)
|
|
|
|
#define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02)
|
|
#define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02)
|
|
#define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12)
|
|
#define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12)
|
|
|
|
/* The VHE specific system registers and their encoding */
|
|
#define sctlr_EL12 sys_reg(3, 5, 1, 0, 0)
|
|
#define cpacr_EL12 sys_reg(3, 5, 1, 0, 2)
|
|
#define ttbr0_EL12 sys_reg(3, 5, 2, 0, 0)
|
|
#define ttbr1_EL12 sys_reg(3, 5, 2, 0, 1)
|
|
#define tcr_EL12 sys_reg(3, 5, 2, 0, 2)
|
|
#define afsr0_EL12 sys_reg(3, 5, 5, 1, 0)
|
|
#define afsr1_EL12 sys_reg(3, 5, 5, 1, 1)
|
|
#define esr_EL12 sys_reg(3, 5, 5, 2, 0)
|
|
#define far_EL12 sys_reg(3, 5, 6, 0, 0)
|
|
#define mair_EL12 sys_reg(3, 5, 10, 2, 0)
|
|
#define amair_EL12 sys_reg(3, 5, 10, 3, 0)
|
|
#define vbar_EL12 sys_reg(3, 5, 12, 0, 0)
|
|
#define contextidr_EL12 sys_reg(3, 5, 13, 0, 1)
|
|
#define cntkctl_EL12 sys_reg(3, 5, 14, 1, 0)
|
|
#define cntp_tval_EL02 sys_reg(3, 5, 14, 2, 0)
|
|
#define cntp_ctl_EL02 sys_reg(3, 5, 14, 2, 1)
|
|
#define cntp_cval_EL02 sys_reg(3, 5, 14, 2, 2)
|
|
#define cntv_tval_EL02 sys_reg(3, 5, 14, 3, 0)
|
|
#define cntv_ctl_EL02 sys_reg(3, 5, 14, 3, 1)
|
|
#define cntv_cval_EL02 sys_reg(3, 5, 14, 3, 2)
|
|
#define spsr_EL12 sys_reg(3, 5, 4, 0, 0)
|
|
#define elr_EL12 sys_reg(3, 5, 4, 0, 1)
|
|
|
|
/**
|
|
* hyp_alternate_select - Generates patchable code sequences that are
|
|
* used to switch between two implementations of a function, depending
|
|
* on the availability of a feature.
|
|
*
|
|
* @fname: a symbol name that will be defined as a function returning a
|
|
* function pointer whose type will match @orig and @alt
|
|
* @orig: A pointer to the default function, as returned by @fname when
|
|
* @cond doesn't hold
|
|
* @alt: A pointer to the alternate function, as returned by @fname
|
|
* when @cond holds
|
|
* @cond: a CPU feature (as described in asm/cpufeature.h)
|
|
*/
|
|
#define hyp_alternate_select(fname, orig, alt, cond) \
|
|
typeof(orig) * __hyp_text fname(void) \
|
|
{ \
|
|
typeof(alt) *val = orig; \
|
|
asm volatile(ALTERNATIVE("nop \n", \
|
|
"mov %0, %1 \n", \
|
|
cond) \
|
|
: "+r" (val) : "r" (alt)); \
|
|
return val; \
|
|
}
|
|
|
|
int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu);
|
|
|
|
void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
|
|
void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
|
|
void __vgic_v3_activate_traps(struct kvm_vcpu *vcpu);
|
|
void __vgic_v3_deactivate_traps(struct kvm_vcpu *vcpu);
|
|
void __vgic_v3_save_aprs(struct kvm_vcpu *vcpu);
|
|
void __vgic_v3_restore_aprs(struct kvm_vcpu *vcpu);
|
|
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
|
|
|
|
void __timer_enable_traps(struct kvm_vcpu *vcpu);
|
|
void __timer_disable_traps(struct kvm_vcpu *vcpu);
|
|
|
|
void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt);
|
|
void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt);
|
|
void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt);
|
|
void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt);
|
|
void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt);
|
|
void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt);
|
|
void __sysreg32_save_state(struct kvm_vcpu *vcpu);
|
|
void __sysreg32_restore_state(struct kvm_vcpu *vcpu);
|
|
|
|
void __debug_switch_to_guest(struct kvm_vcpu *vcpu);
|
|
void __debug_switch_to_host(struct kvm_vcpu *vcpu);
|
|
void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu);
|
|
void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu);
|
|
|
|
|
|
void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
|
|
void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
|
|
bool __fpsimd_enabled(void);
|
|
|
|
void activate_traps_vhe_load(struct kvm_vcpu *vcpu);
|
|
void deactivate_traps_vhe_put(void);
|
|
|
|
u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
|
|
void __noreturn __hyp_do_panic(unsigned long, ...);
|
|
|
|
#endif /* __ARM64_KVM_HYP_H__ */
|
|
|