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openSUSE:Leap:15.0:Rings:1-MinimalX
xen
5a5e459c-2-x86-report-domain-id-on-CPUID.patch
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File 5a5e459c-2-x86-report-domain-id-on-CPUID.patch of Package xen
# Commit 021e1b7c7a70c71f09c944d3e539dbf476fe48d9 # Date 2018-01-16 18:34:04 +0000 # Author Roger Pau Monne <roger.pau@citrix.com> # Committer Wei Liu <wei.liu2@citrix.com> xen/x86: report domain id on cpuid Use the ECX register of the hypervisor leaf 5. The EAX register on this leaf is a flags field that can be used to notice the presence of the domain id in ECX. Note that this is only available to HVM guests. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> --- a/xen/arch/x86/traps.c +++ b/xen/arch/x86/traps.c @@ -928,6 +928,11 @@ void cpuid_hypervisor_leaves(const struc /* Indicate presence of vcpu id and set it in ebx */ res->a |= XEN_HVM_CPUID_VCPU_ID_PRESENT; res->b = v->vcpu_id; + + /* Indicate presence of domain id and set it in ecx */ + res->a |= XEN_HVM_CPUID_DOMID_PRESENT; + res->c = d->domain_id; + break; case 5: /* PV-specific parameters */ --- a/xen/include/public/arch-x86/cpuid.h +++ b/xen/include/public/arch-x86/cpuid.h @@ -94,12 +94,14 @@ * HVM-specific features * Sub-leaf 0: EAX: Features * Sub-leaf 0: EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag) + * Sub-leaf 0: ECX: domain id (iff EAX has XEN_HVM_CPUID_DOMID_PRESENT flag) */ #define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0) /* Virtualized APIC registers */ #define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1) /* Virtualized x2APIC accesses */ /* Memory mapped from other domains has valid IOMMU entries */ #define XEN_HVM_CPUID_IOMMU_MAPPINGS (1u << 2) #define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3) /* vcpu id is present in EBX */ +#define XEN_HVM_CPUID_DOMID_PRESENT (1u << 4) /* domid is present in ECX */ /* * Leaf 6 (0x40000x05)
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