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Diffstat (limited to 'arch/arm64/kvm/sys_regs.h')
-rw-r--r--arch/arm64/kvm/sys_regs.h106
1 files changed, 84 insertions, 22 deletions
diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h
index cc0cc95a0280..b3f904472fac 100644
--- a/arch/arm64/kvm/sys_regs.h
+++ b/arch/arm64/kvm/sys_regs.h
@@ -27,6 +27,13 @@ struct sys_reg_params {
bool is_write;
};
+#define encoding_to_params(reg) \
+ ((struct sys_reg_params){ .Op0 = sys_reg_Op0(reg), \
+ .Op1 = sys_reg_Op1(reg), \
+ .CRn = sys_reg_CRn(reg), \
+ .CRm = sys_reg_CRm(reg), \
+ .Op2 = sys_reg_Op2(reg) })
+
#define esr_sys64_to_params(esr) \
((struct sys_reg_params){ .Op0 = ((esr) >> 20) & 3, \
.Op1 = ((esr) >> 14) & 0x7, \
@@ -35,12 +42,19 @@ struct sys_reg_params {
.Op2 = ((esr) >> 17) & 0x7, \
.is_write = !((esr) & 1) })
+#define esr_cp1x_32_to_params(esr) \
+ ((struct sys_reg_params){ .Op1 = ((esr) >> 14) & 0x7, \
+ .CRn = ((esr) >> 10) & 0xf, \
+ .CRm = ((esr) >> 1) & 0xf, \
+ .Op2 = ((esr) >> 17) & 0x7, \
+ .is_write = !((esr) & 1) })
+
struct sys_reg_desc {
/* Sysreg string for debug */
const char *name;
enum {
- AA32_ZEROHIGH,
+ AA32_DIRECT,
AA32_LO,
AA32_HI,
} aarch32_map;
@@ -57,20 +71,23 @@ struct sys_reg_desc {
struct sys_reg_params *,
const struct sys_reg_desc *);
- /* Initialization for vcpu. */
- void (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *);
+ /*
+ * Initialization for vcpu. Return initialized value, or KVM
+ * sanitized value for ID registers.
+ */
+ u64 (*reset)(struct kvm_vcpu *, const struct sys_reg_desc *);
/* Index into sys_reg[], or 0 if we don't need to save it. */
int reg;
- /* Value (usually reset value) */
+ /* Value (usually reset value), or write mask for idregs */
u64 val;
/* Custom get/set_user functions, fallback to generic if NULL */
int (*get_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
- const struct kvm_one_reg *reg, void __user *uaddr);
+ u64 *val);
int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
- const struct kvm_one_reg *reg, void __user *uaddr);
+ u64 val);
/* Return mask of REG_* runtime visibility overrides */
unsigned int (*visibility)(const struct kvm_vcpu *vcpu,
@@ -79,6 +96,7 @@ struct sys_reg_desc {
#define REG_HIDDEN (1 << 0) /* hidden from userspace and guest */
#define REG_RAZ (1 << 1) /* RAZ from userspace and guest */
+#define REG_USER_WI (1 << 2) /* WI from userspace only */
static __printf(2, 3)
inline void print_sys_reg_msg(const struct sys_reg_params *p,
@@ -90,7 +108,7 @@ inline void print_sys_reg_msg(const struct sys_reg_params *p,
/* Look, we even formatted it for you to paste into the table! */
kvm_pr_unimpl("%pV { Op0(%2u), Op1(%2u), CRn(%2u), CRm(%2u), Op2(%2u), func_%s },\n",
&(struct va_format){ fmt, &va },
- p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, p->is_write ? "write" : "read");
+ p->Op0, p->Op1, p->CRn, p->CRm, p->Op2, str_write_read(p->is_write));
va_end(va);
}
@@ -114,37 +132,48 @@ static inline bool read_zero(struct kvm_vcpu *vcpu,
}
/* Reset functions */
-static inline void reset_unknown(struct kvm_vcpu *vcpu,
+static inline u64 reset_unknown(struct kvm_vcpu *vcpu,
const struct sys_reg_desc *r)
{
BUG_ON(!r->reg);
BUG_ON(r->reg >= NR_SYS_REGS);
- __vcpu_sys_reg(vcpu, r->reg) = 0x1de7ec7edbadc0deULL;
+ __vcpu_assign_sys_reg(vcpu, r->reg, 0x1de7ec7edbadc0deULL);
+ return __vcpu_sys_reg(vcpu, r->reg);
}
-static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
+static inline u64 reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
{
BUG_ON(!r->reg);
BUG_ON(r->reg >= NR_SYS_REGS);
- __vcpu_sys_reg(vcpu, r->reg) = r->val;
+ __vcpu_assign_sys_reg(vcpu, r->reg, r->val);
+ return __vcpu_sys_reg(vcpu, r->reg);
}
-static inline bool sysreg_hidden(const struct kvm_vcpu *vcpu,
- const struct sys_reg_desc *r)
+static inline unsigned int sysreg_visibility(const struct kvm_vcpu *vcpu,
+ const struct sys_reg_desc *r)
{
if (likely(!r->visibility))
- return false;
+ return 0;
- return r->visibility(vcpu, r) & REG_HIDDEN;
+ return r->visibility(vcpu, r);
+}
+
+static inline bool sysreg_hidden(const struct kvm_vcpu *vcpu,
+ const struct sys_reg_desc *r)
+{
+ return sysreg_visibility(vcpu, r) & REG_HIDDEN;
}
static inline bool sysreg_visible_as_raz(const struct kvm_vcpu *vcpu,
const struct sys_reg_desc *r)
{
- if (likely(!r->visibility))
- return false;
+ return sysreg_visibility(vcpu, r) & REG_RAZ;
+}
- return r->visibility(vcpu, r) & REG_RAZ;
+static inline bool sysreg_user_write_ignore(const struct kvm_vcpu *vcpu,
+ const struct sys_reg_desc *r)
+{
+ return sysreg_visibility(vcpu, r) & REG_USER_WI;
}
static inline int cmp_sys_reg(const struct sys_reg_desc *i1,
@@ -183,10 +212,20 @@ find_reg(const struct sys_reg_params *params, const struct sys_reg_desc table[],
return __inline_bsearch((void *)pval, table, num, sizeof(table[0]), match_sys_reg);
}
-const struct sys_reg_desc *find_reg_by_id(u64 id,
- struct sys_reg_params *params,
- const struct sys_reg_desc table[],
- unsigned int num);
+const struct sys_reg_desc *get_reg_by_id(u64 id,
+ const struct sys_reg_desc table[],
+ unsigned int num);
+
+int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
+int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
+int kvm_sys_reg_get_user(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg,
+ const struct sys_reg_desc table[], unsigned int num);
+int kvm_sys_reg_set_user(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg,
+ const struct sys_reg_desc table[], unsigned int num);
+
+bool triage_sysreg_trap(struct kvm_vcpu *vcpu, int *sr_index);
+
+int kvm_finalize_sys_regs(struct kvm_vcpu *vcpu);
#define AA32(_x) .aarch32_map = AA32_##_x
#define Op0(_x) .Op0 = _x
@@ -201,4 +240,27 @@ const struct sys_reg_desc *find_reg_by_id(u64 id,
CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \
Op2(sys_reg_Op2(reg))
+#define CP15_SYS_DESC(reg) \
+ .name = #reg, \
+ .aarch32_map = AA32_DIRECT, \
+ Op0(0), Op1(sys_reg_Op1(reg)), \
+ CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)), \
+ Op2(sys_reg_Op2(reg))
+
+#define ID_REG_LIMIT_FIELD_ENUM(val, reg, field, limit) \
+({ \
+ u64 __f_val = FIELD_GET(reg##_##field##_MASK, val); \
+ (val) &= ~reg##_##field##_MASK; \
+ (val) |= FIELD_PREP(reg##_##field##_MASK, \
+ min(__f_val, \
+ (u64)SYS_FIELD_VALUE(reg, field, limit))); \
+ (val); \
+})
+
+#define TO_ARM64_SYS_REG(r) ARM64_SYS_REG(sys_reg_Op0(SYS_ ## r), \
+ sys_reg_Op1(SYS_ ## r), \
+ sys_reg_CRn(SYS_ ## r), \
+ sys_reg_CRm(SYS_ ## r), \
+ sys_reg_Op2(SYS_ ## r))
+
#endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */
generated by cgit (git 2.34.1) at 2025-12-26 20:08:59 +0000