67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* 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);
|
|
}
|
|
|
|
|
|
int kvm_init_nv_sysregs(struct kvm *kvm);
|
|
|
|
#endif /* __ARM64_KVM_NESTED_H */
|