vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_FSGSBASE_H
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#define _ASM_FSGSBASE_H
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#ifndef __ASSEMBLER__
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#ifdef CONFIG_X86_64
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#include <asm/msr.h>
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/*
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* Read/write a task's FSBASE or GSBASE. This returns the value that
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* the FS/GS base would have (if the task were to be resumed). These
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* work on the current task or on a non-running (typically stopped
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* ptrace child) task.
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*/
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extern unsigned long x86_fsbase_read_task(struct task_struct *task);
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extern unsigned long x86_gsbase_read_task(struct task_struct *task);
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extern void x86_fsbase_write_task(struct task_struct *task, unsigned long fsbase);
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extern void x86_gsbase_write_task(struct task_struct *task, unsigned long gsbase);
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/* Must be protected by X86_FEATURE_FSGSBASE check. */
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static __always_inline unsigned long rdfsbase(void)
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{
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unsigned long fsbase;
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asm volatile("rdfsbase %0" : "=r" (fsbase) :: "memory");
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return fsbase;
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}
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static __always_inline unsigned long rdgsbase(void)
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{
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unsigned long gsbase;
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asm volatile("rdgsbase %0" : "=r" (gsbase) :: "memory");
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return gsbase;
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}
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static __always_inline void wrfsbase(unsigned long fsbase)
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{
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asm volatile("wrfsbase %0" :: "r" (fsbase) : "memory");
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}
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static __always_inline void wrgsbase(unsigned long gsbase)
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{
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asm volatile("wrgsbase %0" :: "r" (gsbase) : "memory");
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}
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#include <asm/cpufeature.h>
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/* Helper functions for reading/writing FS/GS base */
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static inline unsigned long x86_fsbase_read_cpu(void)
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{
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unsigned long fsbase;
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if (boot_cpu_has(X86_FEATURE_FSGSBASE))
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fsbase = rdfsbase();
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else
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rdmsrq(MSR_FS_BASE, fsbase);
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return fsbase;
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}
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static inline void x86_fsbase_write_cpu(unsigned long fsbase)
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{
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if (boot_cpu_has(X86_FEATURE_FSGSBASE))
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wrfsbase(fsbase);
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else
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wrmsrq(MSR_FS_BASE, fsbase);
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}
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extern unsigned long x86_gsbase_read_cpu_inactive(void);
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extern void x86_gsbase_write_cpu_inactive(unsigned long gsbase);
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extern unsigned long x86_fsgsbase_read_task(struct task_struct *task,
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unsigned short selector);
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#endif /* CONFIG_X86_64 */
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#endif /* __ASSEMBLER__ */
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#endif /* _ASM_FSGSBASE_H */
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