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/*
 * 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_EMULATE_H__
#define __ARM_KVM_EMULATE_H__

#include <linux/kvm_host.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/kvm_arm.h>
#include <asm/cputype.h>

/* arm64 compatibility macros */
#define COMPAT_PSR_MODE_ABT	ABT_MODE
#define COMPAT_PSR_MODE_UND	UND_MODE
#define COMPAT_PSR_T_BIT	PSR_T_BIT
#define COMPAT_PSR_I_BIT	PSR_I_BIT
#define COMPAT_PSR_A_BIT	PSR_A_BIT
#define COMPAT_PSR_E_BIT	PSR_E_BIT
#define COMPAT_PSR_IT_MASK	PSR_IT_MASK

unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);

static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
{
	return vcpu_reg(vcpu, reg_num);
}

unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);

static inline unsigned long host_spsr_to_spsr32(unsigned long spsr)
{
	return spsr;
}

static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
					 u8 reg_num)
{
	return *vcpu_reg(vcpu, reg_num);
}

static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
				unsigned long val)
{
	*vcpu_reg(vcpu, reg_num) = val;
}

bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
void kvm_inject_undef32(struct kvm_vcpu *vcpu);
void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
void kvm_inject_vabt(struct kvm_vcpu *vcpu);

static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
{
	kvm_inject_undef32(vcpu);
}

static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
{
	kvm_inject_dabt32(vcpu, addr);
}

static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
{
	kvm_inject_pabt32(vcpu, addr);
}

static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
{
	return kvm_condition_valid32(vcpu);
}

static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
{
	kvm_skip_instr32(vcpu, is_wide_instr);
}

static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
{
	vcpu->arch.hcr = HCR_GUEST_MASK;
}

static inline unsigned long vcpu_get_hcr(const struct kvm_vcpu *vcpu)
{
	return vcpu->arch.hcr;
}

static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
{
	vcpu->arch.hcr = hcr;
}

static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
{
	return 1;
}

static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
{
	return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
}

static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
{
	return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
}

static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
{
	*vcpu_cpsr(vcpu) |= PSR_T_BIT;
}

static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
{
	unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
	return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
}

static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
{
	unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
	return cpsr_mode > USR_MODE;;
}

static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
{
	return vcpu->arch.fault.hsr;
}

static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
{
	u32 hsr = kvm_vcpu_get_hsr(vcpu);

	if (hsr & HSR_CV)
		return (hsr & HSR_COND) >> HSR_COND_SHIFT;

	return -1;
}

static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.fault.hxfar;
}

static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
{
	return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
}

static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
}

static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
}

static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
}

static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
{
	return false;
}

static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
{
	return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
}

static inline bool kvm_vcpu_abt_iss1tw(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
}

static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
}

/* Get Access Size from a data abort */
static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
{
	switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
	case 0:
		return 1;
	case 1:
		return 2;
	case 2:
		return 4;
	default:
		kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
		return -EFAULT;
	}
}

/* This one is not specific to Data Abort */
static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
}

static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
}

static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
}

static inline bool kvm_vcpu_trap_is_exec_fault(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_trap_is_iabt(vcpu) && !kvm_vcpu_abt_iss1tw(vcpu);
}

static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
}

static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
}

static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
{
	switch (kvm_vcpu_trap_get_fault(vcpu)) {
	case FSC_SEA:
	case FSC_SEA_TTW0:
	case FSC_SEA_TTW1:
	case FSC_SEA_TTW2:
	case FSC_SEA_TTW3:
	case FSC_SECC:
	case FSC_SECC_TTW0:
	case FSC_SECC_TTW1:
	case FSC_SECC_TTW2:
	case FSC_SECC_TTW3:
		return true;
	default:
		return false;
	}
}

static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
}

static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
{
	return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
}

static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
{
	*vcpu_cpsr(vcpu) |= PSR_E_BIT;
}

static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
{
	return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
}

static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
						    unsigned long data,
						    unsigned int len)
{
	if (kvm_vcpu_is_be(vcpu)) {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return be16_to_cpu(data & 0xffff);
		default:
			return be32_to_cpu(data);
		}
	} else {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return le16_to_cpu(data & 0xffff);
		default:
			return le32_to_cpu(data);
		}
	}
}

static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
						    unsigned long data,
						    unsigned int len)
{
	if (kvm_vcpu_is_be(vcpu)) {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return cpu_to_be16(data & 0xffff);
		default:
			return cpu_to_be32(data);
		}
	} else {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return cpu_to_le16(data & 0xffff);
		default:
			return cpu_to_le32(data);
		}
	}
}

#endif /* __ARM_KVM_EMULATE_H__ */

Filemanager

Name Type Size Permission Actions
hardware Folder 0755
mach Folder 0755
xen Folder 0755
Kbuild File 568 B 0644
arch_gicv3.h File 9.05 KB 0644
arch_timer.h File 2.48 KB 0644
arm-cci.h File 1.05 KB 0644
asm-offsets.h File 35 B 0644
assembler.h File 10.46 KB 0644
atomic.h File 13.22 KB 0644
auxvec.h File 29 B 0644
bL_switcher.h File 2.28 KB 0644
barrier.h File 2.84 KB 0644
bitops.h File 8.62 KB 0644
bitrev.h File 451 B 0644
bug.h File 2.46 KB 0644
bugs.h File 546 B 0644
cache.h File 813 B 0644
cacheflush.h File 15.54 KB 0644
cachetype.h File 2.71 KB 0644
checksum.h File 3.71 KB 0644
clocksource.h File 153 B 0644
cmpxchg.h File 6.14 KB 0644
compiler.h File 978 B 0644
cp15.h File 3.84 KB 0644
cpu.h File 533 B 0644
cpufeature.h File 1.4 KB 0644
cpuidle.h File 1.33 KB 0644
cputype.h File 8.42 KB 0644
cti.h File 3.62 KB 0644
dcc.h File 1.01 KB 0644
delay.h File 2.83 KB 0644
device.h File 771 B 0644
div64.h File 3.17 KB 0644
dma-contiguous.h File 265 B 0644
dma-iommu.h File 1.01 KB 0644
dma-mapping.h File 7.44 KB 0644
dma.h File 4.18 KB 0644
dmi.h File 528 B 0644
domain.h File 3.65 KB 0644
ecard.h File 5.98 KB 0644
edac.h File 1.51 KB 0644
efi.h File 3.04 KB 0644
elf.h File 4.52 KB 0644
entry-macro-multi.S File 726 B 0644
exception.h File 571 B 0644
fb.h File 375 B 0644
fiq.h File 1.36 KB 0644
firmware.h File 1.82 KB 0644
fixmap.h File 1.84 KB 0644
flat.h File 915 B 0644
floppy.h File 3.61 KB 0644
fncpy.h File 3.08 KB 0644
fpstate.h File 1.73 KB 0644
ftrace.h File 1.92 KB 0644
futex.h File 4.24 KB 0644
glue-cache.h File 3.51 KB 0644
glue-df.h File 2.2 KB 0644
glue-pf.h File 1.12 KB 0644
glue-proc.h File 4.46 KB 0644
glue.h File 759 B 0644
gpio.h File 693 B 0644
hardirq.h File 803 B 0644
highmem.h File 2.15 KB 0644
hugetlb-3level.h File 2.03 KB 0644
hugetlb.h File 1.78 KB 0644
hw_breakpoint.h File 3.53 KB 0644
hw_irq.h File 349 B 0644
hwcap.h File 378 B 0644
hypervisor.h File 140 B 0644
ide.h File 566 B 0644
idmap.h File 355 B 0644
insn.h File 636 B 0644
io.h File 15.96 KB 0644
irq.h File 1015 B 0644
irq_work.h File 234 B 0644
irqflags.h File 3.88 KB 0644
jump_label.h File 1009 B 0644
kexec-internal.h File 272 B 0644
kexec.h File 2.3 KB 0644
kgdb.h File 2.72 KB 0644
kmap_types.h File 190 B 0644
kprobes.h File 2.65 KB 0644
kvm_arm.h File 7.6 KB 0644
kvm_asm.h File 2.84 KB 0644
kvm_coproc.h File 1.99 KB 0644
kvm_emulate.h File 7.84 KB 0644
kvm_host.h File 10.31 KB 0644
kvm_hyp.h File 4.49 KB 0644
kvm_mmio.h File 1.34 KB 0644
kvm_mmu.h File 7.27 KB 0644
limits.h File 166 B 0644
linkage.h File 216 B 0644
mc146818rtc.h File 720 B 0644
mcpm.h File 11.92 KB 0644
mcs_spinlock.h File 570 B 0644
memblock.h File 248 B 0644
memory.h File 9.95 KB 0644
mmu.h File 953 B 0644
mmu_context.h File 3.94 KB 0644
module.h File 1.57 KB 0644
mpu.h File 2.15 KB 0644
mtd-xip.h File 666 B 0644
neon.h File 1.16 KB 0644
nwflash.h File 252 B 0644
opcodes-sec.h File 742 B 0644
opcodes-virt.h File 1.32 KB 0644
opcodes.h File 8.07 KB 0644
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page.h File 3.61 KB 0644
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pgtable-2level.h File 8.51 KB 0644
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sections.h File 189 B 0644
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setup.h File 934 B 0644
shmparam.h File 419 B 0644
signal.h File 500 B 0644
smp.h File 3.1 KB 0644
smp_plat.h File 2.48 KB 0644
smp_scu.h File 1.32 KB 0644
smp_twd.h File 908 B 0644
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spectre.h File 906 B 0644
spinlock.h File 5.49 KB 0644
spinlock_types.h File 541 B 0644
stackprotector.h File 1.09 KB 0644
stacktrace.h File 742 B 0644
stage2_pgtable.h File 2.12 KB 0644
string.h File 1.43 KB 0644
suspend.h File 369 B 0644
swab.h File 1005 B 0644
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sync_bitops.h File 1.03 KB 0644
syscall.h File 2.48 KB 0644
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thread_notify.h File 1.2 KB 0644
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tlb.h File 7.37 KB 0644
tlbflush.h File 17.88 KB 0644
tls.h File 3.09 KB 0644
topology.h File 1.18 KB 0644
traps.h File 1.17 KB 0644
trusted_foundations.h File 2.29 KB 0644
uaccess-asm.h File 2.83 KB 0644
uaccess.h File 16.22 KB 0644
ucontext.h File 2.98 KB 0644
unaligned.h File 846 B 0644
unified.h File 1.61 KB 0644
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v7m.h File 2.93 KB 0644
vdso.h File 507 B 0644
vdso_datapage.h File 1.69 KB 0644
vfp.h File 2.86 KB 0644
vfpmacros.h File 2.1 KB 0644
vga.h File 305 B 0644
virt.h File 2.9 KB 0644
word-at-a-time.h File 2.08 KB 0644
xor.h File 5.22 KB 0644