github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: TDX: Implement hook to get max mapping level of private pages

Browse Source 
Implement hook private_max_mapping_level for TDX to let TDP MMU core get
max mapping level of private pages.

The value is hard coded to 4K for no huge page support for now.

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Co-developed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Co-developed-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241112073816.22256-1-yan.y.zhao@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Isaku Yamahata 2024-11-12 15:38:16 +08:00 committed by Paolo Bonzini
parent 02ab57707b
commit 0036b87a95
3 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kvm/vmx/main.c
View File

@ -174,6 +174,14 @@ static int vt_vcpu_mem_enc_ioctl(struct kvm_vcpu *vcpu, void __user *argp)
return tdx_vcpu_ioctl(vcpu, argp);
}
static int vt_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn)
{
if (is_td(kvm))
return tdx_gmem_private_max_mapping_level(kvm, pfn);
return 0;
}
#define VMX_REQUIRED_APICV_INHIBITS \
(BIT(APICV_INHIBIT_REASON_DISABLED) | \
BIT(APICV_INHIBIT_REASON_ABSENT) | \
@ -331,6 +339,8 @@ struct kvm_x86_ops vt_x86_ops __initdata = {
.mem_enc_ioctl = vt_mem_enc_ioctl,
.vcpu_mem_enc_ioctl = vt_vcpu_mem_enc_ioctl,
.private_max_mapping_level = vt_gmem_private_max_mapping_level
};
struct kvm_x86_init_ops vt_init_ops __initdata = {

5
arch/x86/kvm/vmx/tdx.c
View File

@ -1636,6 +1636,11 @@ int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp)
return ret;
}
int tdx_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn)
{
return PG_LEVEL_4K;
}
static int tdx_online_cpu(unsigned int cpu)
{
unsigned long flags;

2
arch/x86/kvm/vmx/x86_ops.h
View File

@ -144,6 +144,7 @@ int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn,
void tdx_flush_tlb_current(struct kvm_vcpu *vcpu);
void tdx_flush_tlb_all(struct kvm_vcpu *vcpu);
void tdx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, int root_level);
int tdx_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn);
#else
static inline int tdx_vm_init(struct kvm *kvm) { return -EOPNOTSUPP; }
static inline void tdx_mmu_release_hkid(struct kvm *kvm) {}
@ -186,6 +187,7 @@ static inline int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn,
static inline void tdx_flush_tlb_current(struct kvm_vcpu *vcpu) {}
static inline void tdx_flush_tlb_all(struct kvm_vcpu *vcpu) {}
static inline void tdx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, int root_level) {}
static inline int tdx_gmem_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn) { return 0; }
#endif
#endif /* __KVM_X86_VMX_X86_OPS_H */