From e1b4932b5a133351e9d4aefee9c9f7280f86412f Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 13 Aug 2025 00:06:02 -0400 Subject: kernel/amd64: cpu: Add detection of invariant TSC This commit introduces the 'CPU_FEAT_TSCINV' feature bit to indicate whether or not the CPU supports an invariant TSC. Signed-off-by: Ian Moffett --- sys/include/arch/amd64/cpu.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'sys/include/arch/amd64/cpu.h') diff --git a/sys/include/arch/amd64/cpu.h b/sys/include/arch/amd64/cpu.h index 3dadebd..6ed675e 100644 --- a/sys/include/arch/amd64/cpu.h +++ b/sys/include/arch/amd64/cpu.h @@ -42,9 +42,10 @@ #define CPU_IRQ(IRQ_N) (BIT((IRQ_N)) & 0xFF) /* Feature bits */ -#define CPU_FEAT_SMAP BIT(0) -#define CPU_FEAT_SMEP BIT(1) -#define CPU_FEAT_UMIP BIT(2) +#define CPU_FEAT_SMAP BIT(0) +#define CPU_FEAT_SMEP BIT(1) +#define CPU_FEAT_UMIP BIT(2) +#define CPU_FEAT_TSCINV BIT(3) /* TSC invariant */ /* CPU vendors */ #define CPU_VENDOR_OTHER 0x00000000 -- cgit v1.2.3