unsigned int root_level;
spinlock_t phyid_map_lock;
struct kvm_phyid_map *phyid_map;
+ /* Enabled PV features */
+ unsigned long pv_features;
s64 time_offset;
struct kvm_context __percpu *vmcs;
#define KVM_LARCH_SWCSR_LATEST (0x1 << 5)
#define KVM_LARCH_HWCSR_USABLE (0x1 << 6)
+#define LOONGARCH_PV_FEAT_UPDATED BIT_ULL(63)
+#define LOONGARCH_PV_FEAT_MASK (BIT(KVM_FEATURE_IPI) | \
+ BIT(KVM_FEATURE_STEAL_TIME) | \
+ BIT(KVM_FEATURE_VIRT_EXTIOI))
+
struct kvm_vcpu_arch {
/*
* Switch pointer-to-function type to unsigned long
#ifndef _ASM_LOONGARCH_KVM_PARA_H
#define _ASM_LOONGARCH_KVM_PARA_H
+#include <uapi/asm/kvm_para.h>
+
/*
* Hypercall code field
*/
return !!sched_info_on();
}
+static inline bool kvm_guest_has_pv_feature(struct kvm_vcpu *vcpu, unsigned int feature)
+{
+ return vcpu->kvm->arch.pv_features & BIT(feature);
+}
+
#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
/*
* CPUCFG index area: 0x40000000 -- 0x400000ff
- * SW emulation for KVM hypervirsor
+ * SW emulation for KVM hypervirsor, see arch/loongarch/include/uapi/asm/kvm_para.h
*/
-#define CPUCFG_KVM_BASE 0x40000000
-#define CPUCFG_KVM_SIZE 0x100
-
-#define CPUCFG_KVM_SIG (CPUCFG_KVM_BASE + 0)
-#define KVM_SIGNATURE "KVM\0"
-#define CPUCFG_KVM_FEATURE (CPUCFG_KVM_BASE + 4)
-#define KVM_FEATURE_IPI BIT(1)
-#define KVM_FEATURE_STEAL_TIME BIT(2)
#ifndef __ASSEMBLY__
# SPDX-License-Identifier: GPL-2.0
syscall-y += unistd_64.h
-
-generic-y += kvm_para.h
#define KVM_IOC_CPUCFG(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
/* Device Control API on vm fd */
-#define KVM_LOONGARCH_VM_FEAT_CTRL 0
-#define KVM_LOONGARCH_VM_FEAT_LSX 0
-#define KVM_LOONGARCH_VM_FEAT_LASX 1
-#define KVM_LOONGARCH_VM_FEAT_X86BT 2
-#define KVM_LOONGARCH_VM_FEAT_ARMBT 3
-#define KVM_LOONGARCH_VM_FEAT_MIPSBT 4
-#define KVM_LOONGARCH_VM_FEAT_PMU 5
+#define KVM_LOONGARCH_VM_FEAT_CTRL 0
+#define KVM_LOONGARCH_VM_FEAT_LSX 0
+#define KVM_LOONGARCH_VM_FEAT_LASX 1
+#define KVM_LOONGARCH_VM_FEAT_X86BT 2
+#define KVM_LOONGARCH_VM_FEAT_ARMBT 3
+#define KVM_LOONGARCH_VM_FEAT_MIPSBT 4
+#define KVM_LOONGARCH_VM_FEAT_PMU 5
+#define KVM_LOONGARCH_VM_FEAT_PV_IPI 6
+#define KVM_LOONGARCH_VM_FEAT_PV_STEALTIME 7
/* Device Control API on vcpu fd */
#define KVM_LOONGARCH_VCPU_CPUCFG 0
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_KVM_PARA_H
+#define _UAPI_ASM_KVM_PARA_H
+
+#include <linux/types.h>
+
+/*
+ * CPUCFG index area: 0x40000000 -- 0x400000ff
+ * SW emulation for KVM hypervirsor
+ */
+#define CPUCFG_KVM_BASE 0x40000000
+#define CPUCFG_KVM_SIZE 0x100
+#define CPUCFG_KVM_SIG (CPUCFG_KVM_BASE + 0)
+#define KVM_SIGNATURE "KVM\0"
+#define CPUCFG_KVM_FEATURE (CPUCFG_KVM_BASE + 4)
+#define KVM_FEATURE_IPI 1
+#define KVM_FEATURE_STEAL_TIME 2
+/* BIT 24 - 31 are features configurable by user space vmm */
+#define KVM_FEATURE_VIRT_EXTIOI 24
+
+#endif /* _UAPI_ASM_KVM_PARA_H */
return 0;
feature = read_cpucfg(CPUCFG_KVM_FEATURE);
- if (!(feature & KVM_FEATURE_IPI))
+ if (!(feature & BIT(KVM_FEATURE_IPI)))
return 0;
#ifdef CONFIG_SMP
}
addr |= KVM_STEAL_PHYS_VALID;
- kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, KVM_FEATURE_STEAL_TIME, addr);
+ kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, BIT(KVM_FEATURE_STEAL_TIME), addr);
return 0;
}
static void pv_disable_steal_time(void)
{
if (has_steal_clock)
- kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, KVM_FEATURE_STEAL_TIME, 0);
+ kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, BIT(KVM_FEATURE_STEAL_TIME), 0);
}
#ifdef CONFIG_SMP
return 0;
feature = read_cpucfg(CPUCFG_KVM_FEATURE);
- if (!(feature & KVM_FEATURE_STEAL_TIME))
+ if (!(feature & BIT(KVM_FEATURE_STEAL_TIME)))
return 0;
has_steal_clock = 1;
vcpu->arch.gprs[rd] = *(unsigned int *)KVM_SIGNATURE;
break;
case CPUCFG_KVM_FEATURE:
- ret = KVM_FEATURE_IPI;
- if (kvm_pvtime_supported())
- ret |= KVM_FEATURE_STEAL_TIME;
+ ret = vcpu->kvm->arch.pv_features & LOONGARCH_PV_FEAT_MASK;
vcpu->arch.gprs[rd] = ret;
break;
default:
id = kvm_read_reg(vcpu, LOONGARCH_GPR_A1);
data = kvm_read_reg(vcpu, LOONGARCH_GPR_A2);
switch (id) {
- case KVM_FEATURE_STEAL_TIME:
- if (!kvm_pvtime_supported())
- return KVM_HCALL_INVALID_CODE;
-
+ case BIT(KVM_FEATURE_STEAL_TIME):
if (data & ~(KVM_STEAL_PHYS_MASK | KVM_STEAL_PHYS_VALID))
return KVM_HCALL_INVALID_PARAMETER;
vcpu->arch.st.guest_addr = data;
if (!(data & KVM_STEAL_PHYS_VALID))
- break;
+ return 0;
vcpu->arch.st.last_steal = current->sched_info.run_delay;
kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
- break;
+ return 0;
default:
- break;
+ return KVM_HCALL_INVALID_CODE;
};
- return 0;
+ return KVM_HCALL_INVALID_CODE;
};
/*
*/
static void kvm_handle_service(struct kvm_vcpu *vcpu)
{
+ long ret = KVM_HCALL_INVALID_CODE;
unsigned long func = kvm_read_reg(vcpu, LOONGARCH_GPR_A0);
- long ret;
switch (func) {
case KVM_HCALL_FUNC_IPI:
- kvm_send_pv_ipi(vcpu);
- ret = KVM_HCALL_SUCCESS;
+ if (kvm_guest_has_pv_feature(vcpu, KVM_FEATURE_IPI)) {
+ kvm_send_pv_ipi(vcpu);
+ ret = KVM_HCALL_SUCCESS;
+ }
break;
case KVM_HCALL_FUNC_NOTIFY:
- ret = kvm_save_notify(vcpu);
+ if (kvm_guest_has_pv_feature(vcpu, KVM_FEATURE_STEAL_TIME))
+ ret = kvm_save_notify(vcpu);
break;
default:
- ret = KVM_HCALL_INVALID_CODE;
break;
}
case LOONGARCH_CPUCFG2:
case LOONGARCH_CPUCFG6:
return 0;
+ case CPUCFG_KVM_FEATURE:
+ return 0;
default:
return -ENXIO;
}
static int kvm_loongarch_pvtime_has_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr)
{
- if (!kvm_pvtime_supported() ||
- attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
+ if (!kvm_guest_has_pv_feature(vcpu, KVM_FEATURE_STEAL_TIME)
+ || attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
return -ENXIO;
return 0;
uint64_t val;
uint64_t __user *uaddr = (uint64_t __user *)attr->addr;
- ret = _kvm_get_cpucfg_mask(attr->attr, &val);
- if (ret)
- return ret;
+ switch (attr->attr) {
+ case 0 ... (KVM_MAX_CPUCFG_REGS - 1):
+ ret = _kvm_get_cpucfg_mask(attr->attr, &val);
+ if (ret)
+ return ret;
+ break;
+ case CPUCFG_KVM_FEATURE:
+ val = vcpu->kvm->arch.pv_features & LOONGARCH_PV_FEAT_MASK;
+ break;
+ default:
+ return -ENXIO;
+ }
put_user(val, uaddr);
u64 gpa;
u64 __user *user = (u64 __user *)attr->addr;
- if (!kvm_pvtime_supported() ||
- attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
+ if (!kvm_guest_has_pv_feature(vcpu, KVM_FEATURE_STEAL_TIME)
+ || attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
return -ENXIO;
gpa = vcpu->arch.st.guest_addr;
static int kvm_loongarch_cpucfg_set_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr)
{
- return -ENXIO;
+ u64 val, valid;
+ u64 __user *user = (u64 __user *)attr->addr;
+ struct kvm *kvm = vcpu->kvm;
+
+ switch (attr->attr) {
+ case CPUCFG_KVM_FEATURE:
+ if (get_user(val, user))
+ return -EFAULT;
+
+ valid = LOONGARCH_PV_FEAT_MASK;
+ if (val & ~valid)
+ return -EINVAL;
+
+ /* All vCPUs need set the same PV features */
+ if ((kvm->arch.pv_features & LOONGARCH_PV_FEAT_UPDATED)
+ && ((kvm->arch.pv_features & valid) != val))
+ return -EINVAL;
+ kvm->arch.pv_features = val | LOONGARCH_PV_FEAT_UPDATED;
+ return 0;
+ default:
+ return -ENXIO;
+ }
}
static int kvm_loongarch_pvtime_set_attr(struct kvm_vcpu *vcpu,
u64 gpa, __user *user = (u64 __user *)attr->addr;
struct kvm *kvm = vcpu->kvm;
- if (!kvm_pvtime_supported() ||
- attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
+ if (!kvm_guest_has_pv_feature(vcpu, KVM_FEATURE_STEAL_TIME)
+ || attr->attr != KVM_LOONGARCH_VCPU_PVTIME_GPA)
return -ENXIO;
if (get_user(gpa, user))
#include <linux/kvm_host.h>
#include <asm/kvm_mmu.h>
+#include <asm/kvm_vcpu.h>
const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
KVM_GENERIC_VM_STATS(),
spin_lock_init(&kvm->arch.phyid_map_lock);
kvm_init_vmcs(kvm);
+
+ /* Enable all PV features by default */
+ kvm->arch.pv_features = BIT(KVM_FEATURE_IPI);
+ if (kvm_pvtime_supported())
+ kvm->arch.pv_features |= BIT(KVM_FEATURE_STEAL_TIME);
+
kvm->arch.gpa_size = BIT(cpu_vabits - 1);
kvm->arch.root_level = CONFIG_PGTABLE_LEVELS - 1;
kvm->arch.invalid_ptes[0] = 0;
if (cpu_has_pmp)
return 0;
return -ENXIO;
+ case KVM_LOONGARCH_VM_FEAT_PV_IPI:
+ return 0;
+ case KVM_LOONGARCH_VM_FEAT_PV_STEALTIME:
+ if (kvm_pvtime_supported())
+ return 0;
+ return -ENXIO;
default:
return -ENXIO;
}
projects / linux-2.6-block.git / commitdiff