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[kernel] Make IDT per-cpu, not global

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Since we modify IST entries while handling interrupts, the IDT cannot be
a global data structure. Allocate new ones for each CPU.
This commit is contained in:
Justin C. Miller
2021-02-19 21:51:25 -08:00
parent 2d6987341c
commit 6a41446185
7 changed files with 28 additions and 19 deletions
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9
src/kernel/interrupts.cpp
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@@ -85,9 +85,10 @@ isr_handler(cpu_state *regs)
// Clear out the IST for this vector so we just keep using
// this stack
uint8_t old_ist = IDT::get().get_ist(vector);
IDT &idt = IDT::current();
uint8_t old_ist = idt.get_ist(vector);
if (old_ist)
IDT::get().set_ist(vector, 0);
idt.set_ist(vector, 0);
switch (static_cast<isr>(vector)) {
@@ -152,7 +153,7 @@ isr_handler(cpu_state *regs)
case 1:
case 3:
cons->printf(" IDT[%x]\n", index);
IDT::get().dump(index);
IDT::current().dump(index);
break;
default:
@@ -274,7 +275,7 @@ isr_handler(cpu_state *regs)
// Return the IST for this vector to what it was
if (old_ist)
IDT::get().set_ist(vector, old_ist);
idt.set_ist(vector, old_ist);
*reinterpret_cast<uint32_t *>(apic_eoi_addr) = 0;
}