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powerpc: Move update_power8_hid0() into its only user 

update_power8_hid0() is used only by powernv platform subcore.c

Move it there.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/37f41d74faa0c66f90b373e243e8b1ee37a1f6fa.1623219019.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-06-09 06:10:29 +00:00 committed by Michael Ellerman
parent 77b0bed742
commit ab3aab292c
2 changed files with 10 additions and 10 deletions
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10
arch/powerpc/include/asm/reg.h
View File

@ -1446,16 +1446,6 @@ extern void scom970_write(unsigned int address, unsigned long value);
struct pt_regs;
extern void ppc_save_regs(struct pt_regs *regs);
static inline void update_power8_hid0(unsigned long hid0)
{
/*
* The HID0 update on Power8 should at the very least be
* preceded by a SYNC instruction followed by an ISYNC
* instruction
*/
asm volatile("sync; mtspr %0,%1; isync":: "i"(SPRN_HID0), "r"(hid0));
}
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_REG_H */

10
arch/powerpc/platforms/powernv/subcore.c
View File

@ -169,6 +169,16 @@ static void update_hid_in_slw(u64 hid0)
}
}
static inline void update_power8_hid0(unsigned long hid0)
{
/*
* The HID0 update on Power8 should at the very least be
* preceded by a SYNC instruction followed by an ISYNC
* instruction
*/
asm volatile("sync; mtspr %0,%1; isync":: "i"(SPRN_HID0), "r"(hid0));
}
static void unsplit_core(void)
{
u64 hid0, mask;