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Diffstat (limited to 'arch/riscv/kvm/vcpu_sbi.c')
-rw-r--r--arch/riscv/kvm/vcpu_sbi.c142
1 files changed, 110 insertions, 32 deletions
diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c
index a04ff98085..72a2ffb8dc 100644
--- a/arch/riscv/kvm/vcpu_sbi.c
+++ b/arch/riscv/kvm/vcpu_sbi.c
@@ -71,6 +71,10 @@ static const struct kvm_riscv_sbi_extension_entry sbi_ext[] = {
.ext_ptr = &vcpu_sbi_ext_dbcn,
},
{
+ .ext_idx = KVM_RISCV_SBI_EXT_STA,
+ .ext_ptr = &vcpu_sbi_ext_sta,
+ },
+ {
.ext_idx = KVM_RISCV_SBI_EXT_EXPERIMENTAL,
.ext_ptr = &vcpu_sbi_ext_experimental,
},
@@ -80,6 +84,34 @@ static const struct kvm_riscv_sbi_extension_entry sbi_ext[] = {
},
};
+static const struct kvm_riscv_sbi_extension_entry *
+riscv_vcpu_get_sbi_ext(struct kvm_vcpu *vcpu, unsigned long idx)
+{
+ const struct kvm_riscv_sbi_extension_entry *sext = NULL;
+
+ if (idx >= KVM_RISCV_SBI_EXT_MAX)
+ return NULL;
+
+ for (int i = 0; i < ARRAY_SIZE(sbi_ext); i++) {
+ if (sbi_ext[i].ext_idx == idx) {
+ sext = &sbi_ext[i];
+ break;
+ }
+ }
+
+ return sext;
+}
+
+bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx)
+{
+ struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context;
+ const struct kvm_riscv_sbi_extension_entry *sext;
+
+ sext = riscv_vcpu_get_sbi_ext(vcpu, idx);
+
+ return sext && scontext->ext_status[sext->ext_idx] != KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE;
+}
+
void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
struct kvm_cpu_context *cp = &vcpu->arch.guest_context;
@@ -140,28 +172,19 @@ static int riscv_vcpu_set_sbi_ext_single(struct kvm_vcpu *vcpu,
unsigned long reg_num,
unsigned long reg_val)
{
- unsigned long i;
- const struct kvm_riscv_sbi_extension_entry *sext = NULL;
struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context;
-
- if (reg_num >= KVM_RISCV_SBI_EXT_MAX)
- return -ENOENT;
+ const struct kvm_riscv_sbi_extension_entry *sext;
if (reg_val != 1 && reg_val != 0)
return -EINVAL;
- for (i = 0; i < ARRAY_SIZE(sbi_ext); i++) {
- if (sbi_ext[i].ext_idx == reg_num) {
- sext = &sbi_ext[i];
- break;
- }
- }
- if (!sext)
+ sext = riscv_vcpu_get_sbi_ext(vcpu, reg_num);
+ if (!sext || scontext->ext_status[sext->ext_idx] == KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE)
return -ENOENT;
scontext->ext_status[sext->ext_idx] = (reg_val) ?
- KVM_RISCV_SBI_EXT_AVAILABLE :
- KVM_RISCV_SBI_EXT_UNAVAILABLE;
+ KVM_RISCV_SBI_EXT_STATUS_ENABLED :
+ KVM_RISCV_SBI_EXT_STATUS_DISABLED;
return 0;
}
@@ -170,24 +193,16 @@ static int riscv_vcpu_get_sbi_ext_single(struct kvm_vcpu *vcpu,
unsigned long reg_num,
unsigned long *reg_val)
{
- unsigned long i;
- const struct kvm_riscv_sbi_extension_entry *sext = NULL;
struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context;
+ const struct kvm_riscv_sbi_extension_entry *sext;
- if (reg_num >= KVM_RISCV_SBI_EXT_MAX)
- return -ENOENT;
-
- for (i = 0; i < ARRAY_SIZE(sbi_ext); i++) {
- if (sbi_ext[i].ext_idx == reg_num) {
- sext = &sbi_ext[i];
- break;
- }
- }
- if (!sext)
+ sext = riscv_vcpu_get_sbi_ext(vcpu, reg_num);
+ if (!sext || scontext->ext_status[sext->ext_idx] == KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE)
return -ENOENT;
*reg_val = scontext->ext_status[sext->ext_idx] ==
- KVM_RISCV_SBI_EXT_AVAILABLE;
+ KVM_RISCV_SBI_EXT_STATUS_ENABLED;
+
return 0;
}
@@ -310,6 +325,69 @@ int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
return 0;
}
+int kvm_riscv_vcpu_set_reg_sbi(struct kvm_vcpu *vcpu,
+ const struct kvm_one_reg *reg)
+{
+ unsigned long __user *uaddr =
+ (unsigned long __user *)(unsigned long)reg->addr;
+ unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
+ KVM_REG_SIZE_MASK |
+ KVM_REG_RISCV_SBI_STATE);
+ unsigned long reg_subtype, reg_val;
+
+ if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
+ return -EINVAL;
+
+ if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
+ return -EFAULT;
+
+ reg_subtype = reg_num & KVM_REG_RISCV_SUBTYPE_MASK;
+ reg_num &= ~KVM_REG_RISCV_SUBTYPE_MASK;
+
+ switch (reg_subtype) {
+ case KVM_REG_RISCV_SBI_STA:
+ return kvm_riscv_vcpu_set_reg_sbi_sta(vcpu, reg_num, reg_val);
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int kvm_riscv_vcpu_get_reg_sbi(struct kvm_vcpu *vcpu,
+ const struct kvm_one_reg *reg)
+{
+ unsigned long __user *uaddr =
+ (unsigned long __user *)(unsigned long)reg->addr;
+ unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
+ KVM_REG_SIZE_MASK |
+ KVM_REG_RISCV_SBI_STATE);
+ unsigned long reg_subtype, reg_val;
+ int ret;
+
+ if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
+ return -EINVAL;
+
+ reg_subtype = reg_num & KVM_REG_RISCV_SUBTYPE_MASK;
+ reg_num &= ~KVM_REG_RISCV_SUBTYPE_MASK;
+
+ switch (reg_subtype) {
+ case KVM_REG_RISCV_SBI_STA:
+ ret = kvm_riscv_vcpu_get_reg_sbi_sta(vcpu, reg_num, &reg_val);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
+ return -EFAULT;
+
+ return 0;
+}
+
const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
struct kvm_vcpu *vcpu, unsigned long extid)
{
@@ -325,7 +403,7 @@ const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(
if (ext->extid_start <= extid && ext->extid_end >= extid) {
if (entry->ext_idx >= KVM_RISCV_SBI_EXT_MAX ||
scontext->ext_status[entry->ext_idx] ==
- KVM_RISCV_SBI_EXT_AVAILABLE)
+ KVM_RISCV_SBI_EXT_STATUS_ENABLED)
return ext;
return NULL;
@@ -413,12 +491,12 @@ void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu)
if (ext->probe && !ext->probe(vcpu)) {
scontext->ext_status[entry->ext_idx] =
- KVM_RISCV_SBI_EXT_UNAVAILABLE;
+ KVM_RISCV_SBI_EXT_STATUS_UNAVAILABLE;
continue;
}
- scontext->ext_status[entry->ext_idx] = ext->default_unavail ?
- KVM_RISCV_SBI_EXT_UNAVAILABLE :
- KVM_RISCV_SBI_EXT_AVAILABLE;
+ scontext->ext_status[entry->ext_idx] = ext->default_disabled ?
+ KVM_RISCV_SBI_EXT_STATUS_DISABLED :
+ KVM_RISCV_SBI_EXT_STATUS_ENABLED;
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 12:53:14 +0000