Nicholas Piggin 59dc5bfca0 powerpc/64s: avoid reloading (H)SRR registers if they are still valid ... When an interrupt is taken, the SRR registers are set to return to where it left off. Unless they are modified in the meantime, or the return address or MSR are modified, there is no need to reload these registers when returning from interrupt. Introduce per-CPU flags that track the validity of SRR and HSRR registers. These are cleared when returning from interrupt, when using the registers for something else (e.g., OPAL calls), when adjusting the return address or MSR of a context, and when context switching (which changes the return address and MSR). This improves the performance of interrupt returns. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Fold in fixup patch from Nick] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210617155116.2167984-5-npiggin@gmail.com		2021-06-25 00:06:55 +10:00
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fabs.c
fadd.c
fadds.c
fcmpo.c
fcmpu.c
fctiw.c
fctiwz.c
fdiv.c
fdivs.c
fmadd.c
fmadds.c
fmr.c
fmsub.c
fmsubs.c
fmul.c
fmuls.c
fnabs.c
fneg.c
fnmadd.c
fnmadds.c
fnmsub.c
fnmsubs.c
fre.c
fres.c
frsp.c
frsqrte.c
frsqrtes.c
fsel.c
fsqrt.c
fsqrts.c
fsub.c
fsubs.c
lfd.c
lfs.c
Makefile	powerpc: math-emu: remove unneeded header search paths	2019-01-14 20:39:27 +11:00
math.c	powerpc/64s: avoid reloading (H)SRR registers if they are still valid	2021-06-25 00:06:55 +10:00
math_efp.c	powerpc/64s: avoid reloading (H)SRR registers if they are still valid	2021-06-25 00:06:55 +10:00
mcrfs.c
mffs.c
mtfsb0.c
mtfsb1.c
mtfsf.c
mtfsfi.c
stfd.c
stfiwx.c
stfs.c
udivmodti4.c