diff options
| author | Juergen Gross <jgross@suse.com> | 2021-03-11 15:23:13 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-03-11 19:51:49 +0100 |
| commit | 4e6292114c741221479046515b1aa8145cf1e3f6 (patch) | |
| tree | f3a8bb9b151d60b60c26f81872ebcc32cf55a94b /arch/x86/include/asm/paravirt.h | |
| parent | 2fe2a2c7a97c9bc32acc79154b75e754280f7867 (diff) | |
x86/paravirt: Add new features for paravirt patching
For being able to switch paravirt patching from special cased custom
code sequences to ALTERNATIVE handling some X86_FEATURE_* are needed
as new features. This enables to have the standard indirect pv call
as the default code and to patch that with the non-Xen custom code
sequence via ALTERNATIVE patching later.
Make sure paravirt patching is performed before alternatives patching.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210311142319.4723-9-jgross@suse.com
Diffstat (limited to 'arch/x86/include/asm/paravirt.h')
| -rw-r--r-- | arch/x86/include/asm/paravirt.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 6408fd0f55ab..def450f46097 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -45,6 +45,10 @@ static inline u64 paravirt_steal_clock(int cpu) return static_call(pv_steal_clock)(cpu); } +#ifdef CONFIG_PARAVIRT_SPINLOCKS +void __init paravirt_set_cap(void); +#endif + /* The paravirtualized I/O functions */ static inline void slow_down_io(void) { @@ -809,5 +813,11 @@ static inline void paravirt_arch_exit_mmap(struct mm_struct *mm) { } #endif + +#ifndef CONFIG_PARAVIRT_SPINLOCKS +static inline void paravirt_set_cap(void) +{ +} +#endif #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_PARAVIRT_H */ |