Provide functions to check for CPU topology information:
- the number of sockets on sbsa-ref platform.
- the number of clusters in one socket.
- the number of cores in one cluster.
- the number of threads in one core.
As SMC calls can return up to 4 return values. the number of
sockets, clusters and cores are read from TF-A using platform
specific SMC calls. And the number of threads is caluculated
using the total number of cpus and the number of sockets,
clusters and cores.
Signed-off-by: Xiong Yining <xiongyining1...@phytium.com.cn>
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org>
---
.../SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h | 1 +
.../Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h | 26 ++++++++++++++
.../SbsaQemuHardwareInfoLib.c | 36 ++++++++++++++++++++
3 files changed, 63 insertions(+)
diff --git a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
index af6b120561ad..b57573735ace 100644
--- a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
+++ b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
@@ -16,6 +16,7 @@
#define SIP_SVC_GET_GIC_ITS SMC_SIP_FUNCTION_ID(101)
#define SIP_SVC_GET_CPU_COUNT SMC_SIP_FUNCTION_ID(200)
#define SIP_SVC_GET_CPU_NODE SMC_SIP_FUNCTION_ID(201)
+#define SIP_SVC_GET_CPU_TOPOLOGY SMC_SIP_FUNCTION_ID(202)
#define SIP_SVC_GET_MEMORY_NODE_COUNT SMC_SIP_FUNCTION_ID(300)
#define SIP_SVC_GET_MEMORY_NODE SMC_SIP_FUNCTION_ID(301)
diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
b/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
index e5076274fa0a..cef6f6f58194 100644
--- a/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
+++ b/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
@@ -15,6 +15,19 @@ typedef struct {
UINT64 AddressSize;
} MemoryInfo;
+/**
+ Sockets: the number of sockets on sbsa-ref platform.
+ Clusters: the number of clusters in one socket.
+ Cores: the number of cores in one cluster.
+ Threads: the number of threads in one core.
+**/
+typedef struct {
+ UINT32 Sockets;
+ UINT32 Clusters;
+ UINT32 Cores;
+ UINT32 Threads;
+} CpuTopology;
+
/**
Get CPU count from information passed by Qemu.
@@ -83,4 +96,17 @@ GetNumaNodeCount (
VOID
);
+/**
+ Get cpu topology(sockets, clusters, cores, threads) from device tree passed
by Qemu.
+
+ @param [out] CpuTopo A pointer to the cpu topology.
+
+
+ @retval the information of cpu topology.
+**/
+VOID
+GetCpuTopology (
+ OUT CpuTopology *CpuTopo
+ );
+
#endif /* HARDWARE_INFO_LIB */
diff --git
a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
index 596a3453c70f..a2ea8a523625 100644
---
a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
+++
b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
@@ -181,3 +181,39 @@ GetNumaNodeCount (
return NumberNumaNodes;
}
+
+/**
+ Get CPU topology.
+**/
+VOID
+GetCpuTopology (
+ OUT CpuTopology *CpuTopo
+ )
+{
+ UINTN SmcResult;
+ UINTN Arg0;
+ UINTN Arg1;
+ UINTN Arg2;
+ UINT32 NumCores = GetCpuCount ();
+
+ SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_TOPOLOGY, &Arg0, &Arg1, &Arg2);
+ if (SmcResult != SMC_SIP_CALL_SUCCESS) {
+ DEBUG ((DEBUG_ERROR, "%a: SIP_SVC_GET_CPU_TOPOLOGY call failed. We have no
cpu topology information.\n", __FUNCTION__));
+ ResetShutdown ();
+ } else {
+ CpuTopo->Sockets = Arg0;
+ CpuTopo->Clusters = Arg1;
+ CpuTopo->Cores = Arg2;
+ CpuTopo->Threads = NumCores / (CpuTopo->Sockets * CpuTopo->Clusters *
CpuTopo->Cores);
+ }
+
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: CPU Topology: sockets: %d, clusters: %d, cores: %d, threads: %d\n",
+ __FUNCTION__,
+ CpuTopo->Sockets,
+ CpuTopo->Clusters,
+ CpuTopo->Cores,
+ CpuTopo->Threads
+ ));
+}
--
2.45.2
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