pc-q35-4.2+ and pc-i440fx-4.2+ machine types report CPU topology info in the "etc/x86-smp-topology" fw_cfg file. Add a structure type for parsing this blob.
Cc: Ard Biesheuvel <ard.biesheu...@linaro.org> Cc: Igor Mammedov <imamm...@redhat.com> Cc: Jordan Justen <jordan.l.jus...@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1515 Signed-off-by: Laszlo Ersek <ler...@redhat.com> --- OvmfPkg/Include/IndustryStandard/QemuFwCfg.h | 22 ++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/OvmfPkg/Include/IndustryStandard/QemuFwCfg.h b/OvmfPkg/Include/IndustryStandard/QemuFwCfg.h index 7969aba3ca61..fe410d4a3fc2 100644 --- a/OvmfPkg/Include/IndustryStandard/QemuFwCfg.h +++ b/OvmfPkg/Include/IndustryStandard/QemuFwCfg.h @@ -95,4 +95,26 @@ typedef struct { } FW_CFG_DMA_ACCESS; #pragma pack () +// +// Structure describing the VCPU topology on IA32 and X64, in the fw_cfg file +// named "etc/x86-smp-topology". +// +// All fields are little endian. +// +// The number of sockets (aka packages) can be calculated by dividing +// MaxLogicalProcessors by (DiesPerSocket * CoresPerDie * ThreadsPerCore), and +// rounding up the quotient. +// +// APIC ID field widths and offsets can be derived with the standard method +// described in "Intel(R) 64 Architecture Processor Topology Enumeration" +// <http://software.intel.com/en-us/articles/intel-64-architecture-processor-topology-enumeration/>. +// +#pragma pack (1) +typedef struct { + UINT32 DiesPerSocket; + UINT32 CoresPerDie; + UINT32 ThreadsPerCore; + UINT32 MaxLogicalProcessors; +} FW_CFG_X86_TOPOLOGY; +#pragma pack () #endif -- 2.19.1.3.g30247aa5d201 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#48565): https://edk2.groups.io/g/devel/message/48565 Mute This Topic: https://groups.io/mt/34441230/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
