From: Michael Neuling Date: Thu, 25 Apr 2013 15:30:57 +0000 (+0000) Subject: powerpc: Fix hardware IRQs with MMU on exceptions when HV=0 X-Git-Url: https://rtime.felk.cvut.cz/gitweb/linux-imx.git/commitdiff_plain/3e96ca7f007ddb06b82a74a68585d1dbafa85ff1 powerpc: Fix hardware IRQs with MMU on exceptions when HV=0 POWER8 allows us to take interrupts with the MMU on. This gives us a second set of vectors offset at 0x4000. Unfortunately when coping these vectors we missed checking for MSR HV for hardware interrupts (0x500). This results in us trying to use HSRR0/1 when HV=0, rather than SRR0/1 on HW IRQs The below fixes this to check CPU_FTR_HVMODE when patching the code at 0x4500. Also we remove the check for CPU_FTR_ARCH_206 since relocation on IRQs are only available in arch 2.07 and beyond. Thanks to benh for helping find this. Signed-off-by: Michael Neuling CC: Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index e789ee7acbaf..82ceab4d895f 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -797,7 +797,7 @@ hardware_interrupt_relon_hv: _MASKABLE_RELON_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV, SOFTEN_TEST_HV) FTR_SECTION_ELSE _MASKABLE_RELON_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD, SOFTEN_TEST_PR) - ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_206) + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE) STD_RELON_EXCEPTION_PSERIES(0x4600, 0x600, alignment) STD_RELON_EXCEPTION_PSERIES(0x4700, 0x700, program_check) STD_RELON_EXCEPTION_PSERIES(0x4800, 0x800, fp_unavailable)