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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-12-02 07:57:33 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-01-23 21:31:15 +1100 |
| commit | e33ffc956b086675551b86f5f83cf50ca47aa71c (patch) | |
| tree | 2d26279494e7d9c33c35086b443a7b773f6b4bd1 /arch/powerpc/kernel/vdso32/gettimeofday.S | |
| parent | powerpc/vdso32: use LOAD_REG_IMMEDIATE() (diff) | |
| download | linux-dev-e33ffc956b086675551b86f5f83cf50ca47aa71c.tar.xz linux-dev-e33ffc956b086675551b86f5f83cf50ca47aa71c.zip | |
powerpc/vdso32: implement clock_getres entirely
clock_getres returns hrtimer_res for all clocks but coarse ones
for which it returns KTIME_LOW_RES.
return EINVAL for unknown clocks.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/37f94e47c91070b7606fb3ec3fe6fd2302a475a0.1575273217.git.christophe.leroy@c-s.fr
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kernel/vdso32/gettimeofday.S | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S index 9aafacea9c4a..20ae38f3a5a3 100644 --- a/arch/powerpc/kernel/vdso32/gettimeofday.S +++ b/arch/powerpc/kernel/vdso32/gettimeofday.S @@ -196,17 +196,20 @@ V_FUNCTION_END(__kernel_clock_gettime) V_FUNCTION_BEGIN(__kernel_clock_getres) .cfi_startproc /* Check for supported clock IDs */ - cmpwi cr0,r3,CLOCK_REALTIME - cmpwi cr1,r3,CLOCK_MONOTONIC - cror cr0*4+eq,cr0*4+eq,cr1*4+eq - bne cr0,99f + cmplwi cr0, r3, CLOCK_MAX + cmpwi cr1, r3, CLOCK_REALTIME_COARSE + cmpwi cr7, r3, CLOCK_MONOTONIC_COARSE + bgt cr0, 99f + LOAD_REG_IMMEDIATE(r5, KTIME_LOW_RES) + beq cr1, 1f + beq cr7, 1f mflr r12 .cfi_register lr,r12 get_datapage r3, r0 lwz r5, CLOCK_HRTIMER_RES(r3) mtlr r12 - li r3,0 +1: li r3,0 cmpli cr0,r4,0 crclr cr0*4+so beqlr @@ -215,11 +218,11 @@ V_FUNCTION_BEGIN(__kernel_clock_getres) blr /* - * syscall fallback + * invalid clock */ 99: - li r0,__NR_clock_getres - sc + li r3, EINVAL + crset so blr .cfi_endproc V_FUNCTION_END(__kernel_clock_getres) |