From 2ffbb3f61e5b2648128f82fe7e506290702a9215 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:21 +0200 Subject: [PATCH] [S390] spp: remove KVM_AWARE_CMF config option This config option enables or disables three single instructions which aren't expensive. This is too fine grained. Besided that everybody who uses kvm would enable it anyway in order to debug performance problems. Just remove it. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/entry64.S | 2 +- arch/s390/kvm/Kconfig | 11 ----------- arch/s390/kvm/sie64a.S | 4 +--- 3 files changed, 2 insertions(+), 15 deletions(-) diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 178d92536d90..e7192e1cb678 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -65,7 +65,7 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ ltgr %r3,%r3 jz 0f basr %r14,%r3 - 0: +0: #endif .endm diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig index 2f4b687cc7fa..a7251580891c 100644 --- a/arch/s390/kvm/Kconfig +++ b/arch/s390/kvm/Kconfig @@ -33,17 +33,6 @@ config KVM If unsure, say N. -config KVM_AWARE_CMF - depends on KVM - bool "KVM aware sampling" - ---help--- - This option enhances the sampling data from the CPU Measurement - Facility with additional information, that allows to distinguish - guest(s) and host when using the kernel based virtual machine - functionality. - - If unsure, say N. - # OK, it's a little counter-intuitive to do this, but it puts it neatly under # the virtualization menu. source drivers/vhost/Kconfig diff --git a/arch/s390/kvm/sie64a.S b/arch/s390/kvm/sie64a.S index 31646bd0e469..7e9d30d567b0 100644 --- a/arch/s390/kvm/sie64a.S +++ b/arch/s390/kvm/sie64a.S @@ -32,12 +32,10 @@ SPI_PSW = STACK_FRAME_OVERHEAD + __PT_PSW .macro SPP newpp -#ifdef CONFIG_KVM_AWARE_CMF tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_SPP jz 0f .insn s,0xb2800000,\newpp - 0: -#endif +0: .endm sie_irq_handler: -- 2.20.1