arch,traps: handle APIC spurious interrupt

Add dummy spurious interrupt handler. Signed-off-by: Pawel Wieczorkiewicz <[email protected]>
KernelTestFramework · Nov 7, 2023 · 2c37feb · 2c37feb
1 parent 6f9a740
commit 2c37feb
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Showing 4 changed files with 10 additions and 1 deletion.
diff --git a/arch/x86/apic.c b/arch/x86/apic.c
@@ -164,7 +164,7 @@ void init_apic(unsigned int cpu_id, apic_mode_t mode) {
         vmap_4k(apic_get_base(apic_base), apic_base.base, L1_PROT_NOCACHE);
 
     spiv.reg = apic_read(APIC_SPIV);
-    spiv.vector = 0xFF;
+    spiv.vector = APIC_SPI_VECTOR;
     spiv.apic_enable = 1;
     apic_write(APIC_SPIV, spiv.reg);
 }

diff --git a/arch/x86/entry.S b/arch/x86/entry.S
@@ -115,6 +115,10 @@ ENTRY(asm_interrupt_handler_\sym)
 END_FUNC(asm_interrupt_handler_\sym)
 .endm
 
+ENTRY(asm_interrupt_handler_dummy)
+    IRET
+END_FUNC(asm_interrupt_handler_dummy)
+
 ENTRY(handle_exception)
     SAVE_ALL_REGS
 

diff --git a/arch/x86/traps.c b/arch/x86/traps.c
@@ -43,6 +43,7 @@ extern void asm_interrupt_handler_uart1(void);
 extern void asm_interrupt_handler_uart2(void);
 extern void asm_interrupt_handler_keyboard(void);
 extern void asm_interrupt_handler_timer(void);
+extern void asm_interrupt_handler_dummy(void);
 
 extern void terminate_user_task(void);
 
@@ -165,6 +166,8 @@ void init_traps(const cpu_t *cpu) {
                   _ul(asm_interrupt_handler_keyboard), GATE_DPL0, GATE_PRESENT, 0);
     set_intr_gate(&percpu->idt[APIC_TIMER_IRQ], __KERN_CS,
                   _ul(asm_interrupt_handler_timer), GATE_DPL0, GATE_PRESENT, 0);
+    set_intr_gate(&percpu->idt[APIC_SPI_VECTOR], __KERN_CS,
+                  _ul(asm_interrupt_handler_dummy), GATE_DPL0, GATE_PRESENT, 0);
 
     barrier();
     lidt(&percpu->idt_ptr);

diff --git a/include/arch/x86/traps.h b/include/arch/x86/traps.h
@@ -48,6 +48,8 @@
 #define KB_PORT2_IRQ    KEYBOARD_PORT2_IRQ_VECTOR
 #define APIC_TIMER_IRQ  APIC_TIMER_IRQ_VECTOR
 
+#define APIC_SPI_VECTOR 0xFF
+
 extern void init_traps(const cpu_t *cpu);
 extern void init_boot_traps(void);
 extern void init_rmode_traps(void);