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arch: x86_64: Populate the APIC Id

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Program the APIC ID (CPUID leaf 0x1 EBX) with the CPU id. This resolves
an issue where the EDKII firmware expects the APIC ID to vary per-CPU.

Fixes: #5475
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
(cherry picked from commit 57fdaa3a39fc9536ffd2665c470c33476dbdd931)
This commit is contained in:
Jianyong Wu 2023-06-15 11:41:59 +08:00 committed by Bo Chen
parent 574d86dd4d
commit ec56f07316
1 changed files with 7 additions and 0 deletions
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7
arch/src/x86_64/mod.rs
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@ -753,6 +753,13 @@ pub fn configure_vcpu(
CpuidPatch::set_cpuid_reg(&mut cpuid, 0xb, None, CpuidReg::EDX, u32::from(id));
CpuidPatch::set_cpuid_reg(&mut cpuid, 0x1f, None, CpuidReg::EDX, u32::from(id));
// Set ApicId in cpuid for each vcpu
// SAFETY: get host cpuid when eax=1
let mut cpu_ebx = unsafe { core::arch::x86_64::__cpuid(1) }.ebx;
cpu_ebx &= 0xffffff;
cpu_ebx |= (id as u32) << 24;
CpuidPatch::set_cpuid_reg(&mut cpuid, 0x1, None, CpuidReg::EBX, cpu_ebx);
// The TSC frequency CPUID leaf should not be included when running with HyperV emulation
if !kvm_hyperv {
if let Some(tsc_khz) = vcpu.tsc_khz().map_err(Error::GetTscFrequency)? {