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Kernel: Implement CPUFeature as an ArbitrarySizedEnum

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This will make it possible to add many, many more CPU features - more
than the current limit 32 and later limit of 64 if we stick with an enum
class to be specific :^)
This commit is contained in:
Linus Groh 2022-03-27 12:49:20 +01:00 • committed by Andreas Kling
parent e284ee7dcf
commit bc7ec02a82
3 changed files with 69 additions and 74 deletions
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64
Kernel/Arch/x86/CPUID.h
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@ -1,13 +1,15 @@
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/EnumBits.h>
#include <AK/ArbitrarySizedEnum.h>
#include <AK/Types.h>
#include <AK/UFixedBigInt.h>
#include <AK/Platform.h>
VALIDATE_IS_X86()
@ -35,36 +37,34 @@ private:
u32 m_edx { 0xffffffff };
};
// FIXME: This can't hold every CPU feature as-is.
enum class CPUFeature : u32 {
NX = (1 << 0),
PAE = (1 << 1),
PGE = (1 << 2),
RDRAND = (1 << 3),
RDSEED = (1 << 4),
SMAP = (1 << 5),
SMEP = (1 << 6),
SSE = (1 << 7),
TSC = (1 << 8),
RDTSCP = (1 << 9),
CONSTANT_TSC = (1 << 10),
NONSTOP_TSC = (1 << 11),
UMIP = (1 << 12),
SEP = (1 << 13),
SYSCALL = (1 << 14),
MMX = (1 << 15),
SSE2 = (1 << 16),
SSE3 = (1 << 17),
SSSE3 = (1 << 18),
SSE4_1 = (1 << 19),
SSE4_2 = (1 << 20),
XSAVE = (1 << 21),
AVX = (1 << 22),
FXSR = (1 << 23),
LM = (1 << 24),
HYPERVISOR = (1 << 25),
PAT = (1 << 26),
};
AK_ENUM_BITWISE_OPERATORS(CPUFeature);
AK_MAKE_ARBITRARY_SIZED_ENUM(CPUFeature, u128,
NX = CPUFeature(1u) << 0u,
PAE = CPUFeature(1u) << 1u,
PGE = CPUFeature(1u) << 2u,
RDRAND = CPUFeature(1u) << 3u,
RDSEED = CPUFeature(1u) << 4u,
SMAP = CPUFeature(1u) << 5u,
SMEP = CPUFeature(1u) << 6u,
SSE = CPUFeature(1u) << 7u,
TSC = CPUFeature(1u) << 8u,
RDTSCP = CPUFeature(1u) << 9u,
CONSTANT_TSC = CPUFeature(1u) << 10u,
NONSTOP_TSC = CPUFeature(1u) << 11u,
UMIP = CPUFeature(1u) << 12u,
SEP = CPUFeature(1u) << 13u,
SYSCALL = CPUFeature(1u) << 14u,
MMX = CPUFeature(1u) << 15u,
SSE2 = CPUFeature(1u) << 16u,
SSE3 = CPUFeature(1u) << 17u,
SSSE3 = CPUFeature(1u) << 18u,
SSE4_1 = CPUFeature(1u) << 19u,
SSE4_2 = CPUFeature(1u) << 20u,
XSAVE = CPUFeature(1u) << 21u,
AVX = CPUFeature(1u) << 22u,
FXSR = CPUFeature(1u) << 23u,
LM = CPUFeature(1u) << 24u,
HYPERVISOR = CPUFeature(1u) << 25u,
PAT = CPUFeature(1u) << 26u,
__End = CPUFeature(1u) << 27u);
}