pmap tlb shootdowns

2026-10-15 00:33:23 +02:00
parent d84232c394
commit 12e8331752
9 changed files with 189 additions and 13 deletions
@@ -1,5 +1,10 @@
+#include <zinnia/irq.h>
+#include <zinnia/percpu.h>
 #include <zinnia/pmap.h>
 #include <zinnia/types.h>
+#include <x86_64/apic.h>
+#include <x86_64/defs.h>
+#include <x86_64/percpu.h>
 #include <x86_64/pmap.h>

 void pte_clear(pte_t* pte) {
@@ -10,6 +15,26 @@ void pte_flush(uintptr_t vaddr) {
    asm volatile("invlpg [%0]" ::"r"(vaddr) : "memory");
 }

+void pte_flush_all() {
+    uint64_t cr3;
+    asm volatile("mov %0, cr3" : "=r"(cr3));
+    asm volatile("mov cr3, %0" ::"r"(cr3) : "memory");
+}
+
+void pte_shootdown_kick(struct percpu* cpu) {
+    irq_lock();
+    lapic_send_ipi(
+        &percpu_ref(arch_data)->lapic,
+        percpu_ref_on(cpu, arch_data)->lapic.id,
+        IDT_IPI_SHOOTDOWN,
+        APIC_DELIVERY_FIXED,
+        APIC_DEST_PHYSICAL,
+        APIC_LEVEL_ASSERT,
+        APIC_TRIGGER_EDGE
+    );
+    irq_unlock();
+}
+
 pte_t pte_build(phys_t addr, enum pte_flags flags, enum cache_mode cache) {
    pte_t result = ((pte_t)addr & ARCH_PTE_ADDR_MASK) | ARCH_FLAG_PRESENT;