From b92a66a65cb4480774066d9a3080c77eb34b7232 Mon Sep 17 00:00:00 2001 From: Michael Neuling Date: Mon, 10 Sep 2012 00:35:26 +0000 Subject: powerpc: Add denormalisation exception handling for POWER6/7 On POWER6 and POWER7 if the input operand to an instruction is a denormalised single precision binary floating point value we can take a denormalisation exception where it's expected that the hypervisor (HV=1) will fix up the inputs before the instruction is run. This adds code to handle this denormalisation exception for POWER6 and POWER7. It also add a CONFIG_PPC_DENORMALISATION option and sets it in pseries/ppc64_defconfig. This is useful on bare metal systems only. Based on patch from Milton Miller. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/configs/ppc64_defconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/configs/ppc64_defconfig') diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig index db27c82e0542..e263e6a5aca1 100644 --- a/arch/powerpc/configs/ppc64_defconfig +++ b/arch/powerpc/configs/ppc64_defconfig @@ -51,6 +51,7 @@ CONFIG_KEXEC=y CONFIG_IRQ_ALL_CPUS=y CONFIG_MEMORY_HOTREMOVE=y CONFIG_SCHED_SMT=y +CONFIG_PPC_DENORMALISATION=y CONFIG_PCCARD=y CONFIG_ELECTRA_CF=y CONFIG_HOTPLUG_PCI=m -- cgit v1.2.3