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cleanup

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Marvin
2026-09-25 15:39:16 +02:00
committed by Marvin Friedrich
parent b9ee87aed4
commit 6e92817f3f
35 changed files with 271 additions and 157 deletions
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arch/x86_64/percpu.c
+16 -10
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@@ -8,6 +8,7 @@
#include <x86_64/gdt.h>
#include <x86_64/hpet.h>
#include <x86_64/idt.h>
#include <x86_64/percpu.h>
#include <x86_64/syscall.h>
#include <x86_64/tsc.h>
@@ -39,11 +40,16 @@ union ia32_star {
static_assert(sizeof(union ia32_star) == 8);
[[__percpu]]
struct arch_percpu arch_data = {0};
static void setup_cpu(struct percpu* cpu) {
asm_wrmsr(MSR_KERNEL_GS_BASE, 0);
asm_wrmsr(MSR_GS_BASE, (uint64_t)cpu);
asm_wrmsr(MSR_FS_BASE, 0);
struct arch_percpu* arch_cpu = percpu_ref(arch_data);
gdt_load();
// TODO: not if FRED
@@ -88,13 +94,13 @@ static void setup_cpu(struct percpu* cpu) {
asm_wrxcr(0, xcr0);
cpu->arch.fpu_size = cpuid13.ecx;
cpu->arch.fpu_save = asm_xsave;
cpu->arch.fpu_restore = asm_xrstor;
arch_cpu->fpu_size = cpuid13.ecx;
arch_cpu->fpu_save = asm_xsave;
arch_cpu->fpu_restore = asm_xrstor;
} else {
cpu->arch.fpu_size = 512;
cpu->arch.fpu_save = asm_fxsave;
cpu->arch.fpu_restore = asm_fxrstor;
arch_cpu->fpu_size = 512;
arch_cpu->fpu_save = asm_fxsave;
arch_cpu->fpu_restore = asm_fxrstor;
}
if (cpuid7.ecx & CPUID_7C_UMIP)
@@ -105,16 +111,16 @@ static void setup_cpu(struct percpu* cpu) {
if (cpuid7.ebx & CPUID_7B_SMAP) {
cr4 |= CR4_SMAP;
cpu->arch.can_smap = true;
arch_cpu->can_smap = true;
}
if (cpuid7.ebx & CPUID_7B_FSGSBASE)
cr4 |= CR4_FSGSBASE;
asm volatile("mov %0, cr0" : "=r"(cr0));
asm volatile("mov %0, cr4" : "=r"(cr4));
asm volatile("mov cr0, %0" ::"r"(cr0));
asm volatile("mov cr4, %0" ::"r"(cr4));
lapic_init(&cpu->arch.lapic);
lapic_init(&arch_cpu->lapic);
cpu->online = true;
}