71 	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;  in __show_regs()  local
100 		printk("%sFS:  %016lx GS:  %016lx\n",  in __show_regs()
108 	asm("movl %%gs,%0" : "=r" (gsindex));  in __show_regs()
111 	rdmsrl(MSR_GS_BASE, gs);  in __show_regs()
119 	printk("%sFS:  %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",  in __show_regs()
120 	       log_lvl, fs, fsindex, gs, gsindex, shadowgs);  in __show_regs()
153 	GS  enumerator
159  * the wrong GS.
173 	 * operate with its own GS base address:  in __rdgsbase_inactive()
175 	 *   the GS base address with the IA32_KERNEL_GS_BASE MSR.  in __rdgsbase_inactive()
177 	 *   the GS base address with the IA32_KERNEL_GS_BASE MSR.  in __rdgsbase_inactive()
179 	 * And the operating system can still setup the GS segment for a  in __rdgsbase_inactive()
180 	 * user thread without the need of loading a user thread GS with:  in __rdgsbase_inactive()
182 	 *   of the GS segment without compromising its ability always to  in __rdgsbase_inactive()
183 	 *   operate with its own GS base address.  in __rdgsbase_inactive()
184 	 * - Accessing the GS segment base address for a user thread as  in __rdgsbase_inactive()
187 	 * Note, LKGS loads the GS base address into the IA32_KERNEL_GS_BASE  in __rdgsbase_inactive()
188 	 * MSR instead of the GS segment’s descriptor cache. As such, the  in __rdgsbase_inactive()
189 	 * operating system never changes its runtime GS base address.  in __rdgsbase_inactive()
208  * the wrong GS.
230  * Saves the FS or GS base for an outgoing thread if FSGSBASE extensions are
277 	savesegment(gs, task->thread.gsindex);  in save_fsgs()
288 		save_base_legacy(task, task->thread.gsindex, GS);  in save_fsgs()
395 		/* Update the FS and GS selectors if they could have changed. */  in x86_fsgsbase_load()
399 			loadseg(GS, next->gsindex);  in x86_fsgsbase_load()
408 				next->gsindex, next->gsbase, GS);  in x86_fsgsbase_load()
603  * - could test fs/gs bitsliced
622 	/* We must save %fs and %gs before load_TLS() because  in __switch_to()
623 	 * %fs and %gs may be cleared by load_TLS().  in __switch_to()
882 			loadseg(GS, 0);  in do_arch_prctl_64()
901 		 * with %gs  in do_arch_prctl_64()
909 		 * as %gs above.  in do_arch_prctl_64()