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feat(amd64): cpu-local on cpu0

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Loïc Grégoire
2026-03-31 19:39:15 -04:00
parent 55379d671f
commit c7c145f4e3
3 changed files with 20 additions and 6 deletions
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src/arch/amd64/root.zig
+10 -3
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@@ -110,6 +110,12 @@ pub inline fn wrmsr(msr: Msr, value: u64) void {
);
}
pub inline fn rdgsbase() usize {
return asm volatile ("rdgsbase %[ret]"
: [ret] "=r" (-> usize),
);
}
pub inline fn invlpg(addr: u64) void {
asm volatile ("invlpg (%[addr])"
:
@@ -204,7 +210,7 @@ pub const Cr4 = packed struct(u64) {
osxmmEex: bool,
umip: bool,
la57: bool,
reserved: u4,
reserved: u3,
fsgsbase: bool,
pcide: bool,
osxsave: bool,
@@ -213,16 +219,17 @@ pub const Cr4 = packed struct(u64) {
smap: bool,
pke: bool,
cet: bool,
reserved2: u40,
};
pub inline fn read_cr(comptime n: u2) u64 {
pub inline fn read_cr(comptime n: u8) u64 {
comptime std.debug.assert(n != 1);
return asm volatile (std.fmt.comptimePrint("mov %%cr{}, %[ret]", .{n})
: [ret] "=r" (-> u64),
);
}
pub inline fn write_cr(comptime n: u2, value: u64) void {
pub inline fn write_cr(comptime n: u8, value: u64) void {
comptime std.debug.assert(n != 1);
asm volatile (std.fmt.comptimePrint("mov %[value], %%cr{}", .{n})
: