Commit f1d84b59 authored by Borislav Petkov (AMD)'s avatar Borislav Petkov (AMD)
Browse files

x86/mm: Carve out INVLPG inline asm for use by others 



No functional changes.

Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/ZyulbYuvrkshfsd2@antipodes
parent d9bb4054

arch/x86/include/asm/tlb.h

+4 −0
Original line number Diff line number Diff line
@@ -34,4 +34,8 @@ static inline void __tlb_remove_table(void *table) 
	free_page_and_swap_cache(table);

}



static inline void invlpg(unsigned long addr)

{

	asm volatile("invlpg (%0)" ::"r" (addr) : "memory");

}

#endif /* _ASM_X86_TLB_H */

arch/x86/mm/tlb.c

+2 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <asm/cacheflush.h>

#include <asm/apic.h>

#include <asm/perf_event.h>

#include <asm/tlb.h>



#include "mm_internal.h"
@@ -1140,7 +1141,7 @@ STATIC_NOPV void native_flush_tlb_one_user(unsigned long addr) 
	bool cpu_pcide;



	/* Flush 'addr' from the kernel PCID: */

	asm volatile("invlpg (%0)" ::"r" (addr) : "memory");

	invlpg(addr);



	/* If PTI is off there is no user PCID and nothing to flush. */

	if (!static_cpu_has(X86_FEATURE_PTI))