mirrors/Astral
1
0
Fork 0
mirror of https://github.com/Mathewnd/Astral.git synced 2026-10-27 12:48:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

cpuid: better implementation

Browse Source
This commit is contained in:
Matheus
2024-09-29 11:21:21 -03:00
parent b8acbc5bcd
commit 11f76ab01d
2 changed files with 100 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel-src/arch/x86-64/cpu.c
+2 -34
View File
@@ -2,12 +2,8 @@
#include <arch/apic.h>
#include <cpuid.h>
#include <logging.h>
#include <arch/cpuid.h>
#define CPUID_VENDOR_AMD "AuthenticAMD"
#define CPUID_VENDOR_INTEL "GenuineIntel"
#define CPUID_SYSCALL (1 << 11)
#define CPUID_LEAF_1_EDX_HTT (1 << 28)
#define EFER_SYSCALLENABLE 1
void arch_syscall_entry();
@@ -43,34 +39,6 @@ static void x87isr(isr_t *self, context_t *ctx) {
}
}
static bool cpuid_leaf_0xb_available(void) {
if (current_cpu()->cpuid_max < 0xb)
return false;
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid_count(0xb, 0, &eax, &ebx, &ecx, &edx);
return ebx != 0;
}
static bool cpuid_leaf_0x80000008_available(void) {
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
if (eax < 0x80000008)
return false;
return true;
}
static bool cpuid_leaf_0x4_available(void) {
if (current_cpu()->cpuid_max < 0x4)
return false;
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid_count(0xb, 0, &eax, &ebx, &ecx, &edx);
return eax != 0;
}
#define TOPOLOGY_TYPE_THREAD 1
#define TOPOLOGY_TYPE_CORE 2
#define TOPOLOGY_TYPE_PACKAGE 0xffffffff
@@ -183,7 +151,7 @@ void cpu_initstate() {
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
__assert(edx & CPUID_SYSCALL);
__assert(edx & CPUID_LEAF_0x80000001_EDX_SYSCALL);
uint64_t efer = rdmsr(MSR_EFER);
efer |= EFER_SYSCALLENABLE;
wrmsr(MSR_EFER, efer);