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Diffstat (limited to 'arch/arm64/include/asm/kvm_nested.h')
-rw-r--r--arch/arm64/include/asm/kvm_nested.h56
1 files changed, 50 insertions, 6 deletions
diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h
index 6cec8e9c6c..4882905357 100644
--- a/arch/arm64/include/asm/kvm_nested.h
+++ b/arch/arm64/include/asm/kvm_nested.h
@@ -2,8 +2,9 @@
#ifndef __ARM64_KVM_NESTED_H
#define __ARM64_KVM_NESTED_H
-#include <asm/kvm_emulate.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)
{
@@ -12,12 +13,55 @@ static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu)
vcpu_has_feature(vcpu, KVM_ARM_VCPU_HAS_EL2));
}
-extern bool __check_nv_sr_forward(struct kvm_vcpu *vcpu);
+/* 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;
-struct sys_reg_params;
-struct sys_reg_desc;
+ 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 __check_nv_sr_forward(struct kvm_vcpu *vcpu);
-void access_nested_id_reg(struct kvm_vcpu *v, struct sys_reg_params *p,
- const struct sys_reg_desc *r);
+int kvm_init_nv_sysregs(struct kvm *kvm);
#endif /* __ARM64_KVM_NESTED_H */