kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2023-01-13	x86/gsseg: Use the LKGS instruction if available for load_gs_index()	H. Peter Anvin (Intel)	1	-4/+29
	The LKGS instruction atomically loads a segment descriptor into the %gs descriptor registers, except that %gs.base is unchanged, and the base is instead loaded into MSR_IA32_KERNEL_GS_BASE, which is exactly what we want this function to do. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Xin Li <xin3.li@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20230112072032.35626-6-xin3.li@intel.com Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org>
2023-01-12	x86/gsseg: Move load_gs_index() to its own new header file	H. Peter Anvin (Intel)	1	-0/+41
	GS is a special segment on x86_64, move load_gs_index() to its own new header file to simplify header inclusion. No change in functionality. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Xin Li <xin3.li@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20230112072032.35626-5-xin3.li@intel.com