This implements a few helpers that help manipulate the AVIC's physical and logical id table entries.
Signed-off-by: Maxim Levitsky mlevitsk@redhat.com --- arch/x86/kvm/svm/svm.h | 45 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 6fcb164a6ee4a..dfca4c06e2071 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -628,6 +628,51 @@ void avic_vcpu_unblocking(struct kvm_vcpu *vcpu); void avic_ring_doorbell(struct kvm_vcpu *vcpu); unsigned long avic_vcpu_get_apicv_inhibit_reasons(struct kvm_vcpu *vcpu);
+#define INVALID_BACKING_PAGE (~(u64)0) + +static inline u64 physid_entry_get_backing_table(u64 entry) +{ + if (!(entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK)) + return INVALID_BACKING_PAGE; + return entry & AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK; +} + +static inline int physid_entry_get_apicid(u64 entry) +{ + if (!(entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK)) + return -1; + if (!(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)) + return -1; + + return entry & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK; +} + +static inline int logid_get_physid(u64 entry) +{ + if (!(entry & AVIC_LOGICAL_ID_ENTRY_VALID_BIT)) + return -1; + return entry & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK; +} + +static inline void physid_entry_set_backing_table(u64 *entry, u64 value) +{ + *entry &= ~AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK; + *entry |= (AVIC_PHYSICAL_ID_ENTRY_VALID_MASK | value); +} + +static inline void physid_entry_set_apicid(u64 *entry, int value) +{ + WARN_ON(!(*entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK)); + + *entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK; + + if (value == -1) + *entry &= ~(AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK); + else + *entry |= (AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK | value); +} + + /* sev.c */
#define GHCB_VERSION_MAX 1ULL