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Kernel: List all CPUs in /proc/cpuinfo

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Tom 2020-06-27 17:06:33 -06:00 • committed by Andreas Kling
parent fb41d89384
commit d98edb3171
12 changed files with 229 additions and 64 deletions
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25
Kernel/Arch/i386/CPU.h
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@ -28,6 +28,7 @@
#include <AK/Badge.h>
#include <AK/Noncopyable.h>
#include <AK/Vector.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VirtualAddress.h>
@ -609,6 +610,8 @@ struct TrapFrame;
#define GDT_SELECTOR_PROC 0x30
#define GDT_SELECTOR_TSS 0x38
class ProcessorInfo;
class Processor {
Processor* m_self; // must be first field (%fs offset 0x0)
@ -622,11 +625,14 @@ class Processor {
TSS32 m_tss;
static FPUState s_clean_fpu_state;
ProcessorInfo* m_info;
bool m_invoke_scheduler_async;
void gdt_init();
void write_raw_gdt_entry(u16 selector, u32 low, u32 high);
void write_gdt_entry(u16 selector, Descriptor& descriptor);
static Vector<Processor*>& processors();
public:
void initialize(u32 cpu);
@ -634,15 +640,30 @@ public:
Descriptor& get_gdt_entry(u16 selector);
void flush_gdt();
const DescriptorTablePointer& get_gdtr();
static Processor& by_id(u32 cpu);
template <typename Callback>
static inline IterationDecision for_each(Callback callback)
{
auto& procs = processors();
for (auto it = procs.begin(); it != procs.end(); ++it) {
if (callback(**it) == IterationDecision::Break)
return IterationDecision::Break;
}
return IterationDecision::Continue;
}
ALWAYS_INLINE ProcessorInfo& info() { return *m_info; }
ALWAYS_INLINE static Processor& current()
{
return *(Processor*)read_fs_u32(0);
}
ALWAYS_INLINE static u32 id()
ALWAYS_INLINE u32 id()
{
return current().m_cpu;
return m_cpu;
}
ALWAYS_INLINE u32& in_irq()