blob: 5e0ab059624685d77683de046300beb4e76e2916 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ARM64_KVM_NESTED_H
#define __ARM64_KVM_NESTED_H
#include <linux/bitfield.h>
#include <linux/kvm_host.h>
#include <asm/kvm_emulate.h>
static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu)
{
return (!__is_defined(__KVM_NVHE_HYPERVISOR__) &&
cpus_have_final_cap(ARM64_HAS_NESTED_VIRT) &&
vcpu_has_feature(vcpu, KVM_ARM_VCPU_HAS_EL2));
}
/* Translation helpers from non-VHE EL2 to EL1 */
static inline u64 tcr_el2_ps_to_tcr_el1_ips(u64 tcr_el2)
{
return (u64)FIELD_GET(TCR_EL2_PS_MASK, tcr_el2) << TCR_IPS_SHIFT;
}
static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr)
{
return TCR_EPD1_MASK | /* disable TTBR1_EL1 */
((tcr & TCR_EL2_TBI) ? TCR_TBI0 : 0) |
tcr_el2_ps_to_tcr_el1_ips(tcr) |
(tcr & TCR_EL2_TG0_MASK) |
(tcr & TCR_EL2_ORGN0_MASK) |
(tcr & TCR_EL2_IRGN0_MASK) |
(tcr & TCR_EL2_T0SZ_MASK);
}
static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2)
{
u64 cpacr_el1 = 0;
if (cptr_el2 & CPTR_EL2_TTA)
cpacr_el1 |= CPACR_ELx_TTA;
if (!(cptr_el2 & CPTR_EL2_TFP))
cpacr_el1 |= CPACR_ELx_FPEN;
if (!(cptr_el2 & CPTR_EL2_TZ))
cpacr_el1 |= CPACR_ELx_ZEN;
return cpacr_el1;
}
static inline u64 translate_sctlr_el2_to_sctlr_el1(u64 val)
{
/* Only preserve the minimal set of bits we support */
val &= (SCTLR_ELx_M | SCTLR_ELx_A | SCTLR_ELx_C | SCTLR_ELx_SA |
SCTLR_ELx_I | SCTLR_ELx_IESB | SCTLR_ELx_WXN | SCTLR_ELx_EE);
val |= SCTLR_EL1_RES1;
return val;
}
static inline u64 translate_ttbr0_el2_to_ttbr0_el1(u64 ttbr0)
{
/* Clear the ASID field */
return ttbr0 & ~GENMASK_ULL(63, 48);
}
extern bool forward_smc_trap(struct kvm_vcpu *vcpu);
int kvm_init_nv_sysregs(struct kvm *kvm);
#ifdef CONFIG_ARM64_PTR_AUTH
bool kvm_auth_eretax(struct kvm_vcpu *vcpu, u64 *elr);
#else
static inline bool kvm_auth_eretax(struct kvm_vcpu *vcpu, u64 *elr)
{
/* We really should never execute this... */
WARN_ON_ONCE(1);
*elr = 0xbad9acc0debadbad;
return false;
}
#endif
#endif /* __ARM64_KVM_NESTED_H */
|
