qemu-kvm/kvm-i386-topology-Introduce-helpers-for-various-topology.patch

From 693fa1348914dfa37ce5fa4a654e67d573e4941a Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 18 Jul 2025 18:03:44 +0200
Subject: [PATCH 011/115] i386/topology: Introduce helpers for various topology
 info of different level

RH-Author: Paolo Bonzini <pbonzini@redhat.com>
RH-MergeRequest: 391: TDX support, including attestation and device assignment
RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728
RH-Acked-by: Yash Mankad <None>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [11/115] 52179ff6718bd4bfd9eac78efd20e7e5337d3b07 (bonzini/rhel-qemu-kvm)

Introduce various helpers for getting the topology info of different
semantics. Using the helper is more self-explanatory.

Besides, the semantic of the helper will stay unchanged even when new
topology is added in the future. At that time, updating the
implementation of the helper without affecting the callers.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20241219110125.1266461-6-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit e60cbeec190d349682bf97cf55446e8ae260b11a)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 12b80c6f6e6edf61c998aa5bac9d0c44a81144a0)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/i386/topology.h | 25 +++++++++++++++++++++++++
 target/i386/cpu.c          | 11 ++++-------
 2 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/include/hw/i386/topology.h b/include/hw/i386/topology.h
index 1880df621a..e533a117c3 100644
--- a/include/hw/i386/topology.h
+++ b/include/hw/i386/topology.h
@@ -217,4 +217,29 @@ static inline bool x86_has_extended_topo(unsigned long *topo_bitmap)
            test_bit(CPU_TOPO_LEVEL_DIE, topo_bitmap);
 }
 
+static inline unsigned x86_module_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->modules_per_die * topo_info->dies_per_pkg;
+}
+
+static inline unsigned x86_cores_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->cores_per_module * x86_module_per_pkg(topo_info);
+}
+
+static inline unsigned x86_threads_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->threads_per_core * x86_cores_per_pkg(topo_info);
+}
+
+static inline unsigned x86_threads_per_module(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->threads_per_core * topo_info->cores_per_module;
+}
+
+static inline unsigned x86_threads_per_die(X86CPUTopoInfo *topo_info)
+{
+    return x86_threads_per_module(topo_info) * topo_info->modules_per_die;
+}
+
 #endif /* HW_I386_TOPOLOGY_H */
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index b639769ef3..1c79eb9a06 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -312,13 +312,11 @@ static uint32_t num_threads_by_topo_level(X86CPUTopoInfo *topo_info,
     case CPU_TOPO_LEVEL_CORE:
         return topo_info->threads_per_core;
     case CPU_TOPO_LEVEL_MODULE:
-        return topo_info->threads_per_core * topo_info->cores_per_module;
+        return x86_threads_per_module(topo_info);
     case CPU_TOPO_LEVEL_DIE:
-        return topo_info->threads_per_core * topo_info->cores_per_module *
-               topo_info->modules_per_die;
+        return x86_threads_per_die(topo_info);
     case CPU_TOPO_LEVEL_PACKAGE:
-        return topo_info->threads_per_core * topo_info->cores_per_module *
-               topo_info->modules_per_die * topo_info->dies_per_pkg;
+        return x86_threads_per_pkg(topo_info);
     default:
         g_assert_not_reached();
     }
@@ -6957,8 +6955,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
     topo_info.cores_per_module = cs->nr_cores / env->nr_dies / env->nr_modules;
     topo_info.threads_per_core = cs->nr_threads;
 
-    threads_per_pkg = topo_info.threads_per_core * topo_info.cores_per_module *
-                      topo_info.modules_per_die * topo_info.dies_per_pkg;
+    threads_per_pkg = x86_threads_per_pkg(&topo_info);
 
     /* Calculate & apply limits for different index ranges */
     if (index >= 0xC0000000) {
-- 
2.50.1