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[RFC 6/8] i386/cpu: Update cache topology with machine's configuration
From: |
Zhao Liu |
Subject: |
[RFC 6/8] i386/cpu: Update cache topology with machine's configuration |
Date: |
Tue, 20 Feb 2024 17:25:02 +0800 |
From: Zhao Liu <zhao1.liu@intel.com>
User will configure SMP cache topology via -smp.
For this case, update the x86 CPUs' cache topology with user's
configuration in MachineState.
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
target/i386/cpu.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index d7cb0f1e49b4..4b5c551fe7f0 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -7582,6 +7582,27 @@ static void x86_cpu_realizefn(DeviceState *dev, Error
**errp)
#ifndef CONFIG_USER_ONLY
MachineState *ms = MACHINE(qdev_get_machine());
+
+ if (ms->smp_cache.l1d != CPU_TOPO_LEVEL_INVALID) {
+ env->cache_info_cpuid4.l1d_cache->share_level = ms->smp_cache.l1d;
+ env->cache_info_amd.l1d_cache->share_level = ms->smp_cache.l1d;
+ }
+
+ if (ms->smp_cache.l1i != CPU_TOPO_LEVEL_INVALID) {
+ env->cache_info_cpuid4.l1i_cache->share_level = ms->smp_cache.l1i;
+ env->cache_info_amd.l1i_cache->share_level = ms->smp_cache.l1i;
+ }
+
+ if (ms->smp_cache.l2 != CPU_TOPO_LEVEL_INVALID) {
+ env->cache_info_cpuid4.l2_cache->share_level = ms->smp_cache.l2;
+ env->cache_info_amd.l2_cache->share_level = ms->smp_cache.l2;
+ }
+
+ if (ms->smp_cache.l3 != CPU_TOPO_LEVEL_INVALID) {
+ env->cache_info_cpuid4.l3_cache->share_level = ms->smp_cache.l3;
+ env->cache_info_amd.l3_cache->share_level = ms->smp_cache.l3;
+ }
+
qemu_register_reset(x86_cpu_machine_reset_cb, cpu);
if (cpu->env.features[FEAT_1_EDX] & CPUID_APIC || ms->smp.cpus > 1) {
--
2.34.1
- Re: [RFC 4/8] hw/core: Add cache topology options in -smp, (continued)
RE: [RFC 4/8] hw/core: Add cache topology options in -smp, JeeHeng Sia, 2024/02/28
[RFC 5/8] i386/cpu: Support thread and module level cache topology, Zhao Liu, 2024/02/20
[RFC 6/8] i386/cpu: Update cache topology with machine's configuration,
Zhao Liu <=
[RFC 7/8] i386/pc: Support cache topology in -smp for PC machine, Zhao Liu, 2024/02/20
[RFC 8/8] qemu-options: Add the cache topology description of -smp, Zhao Liu, 2024/02/20
Re: [RFC 0/8] Introduce SMP Cache Topology, Philippe Mathieu-Daudé, 2024/02/20