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Commit 920552b2 authored by David Hildenbrand's avatar David Hildenbrand Committed by Paolo Bonzini
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KVM: disable halt_poll_ns as default for s390x 



We observed some performance degradation on s390x with dynamic
halt polling. Until we can provide a proper fix, let's enable
halt_poll_ns as default only for supported architectures.

Architectures are now free to set their own halt_poll_ns
default value.

Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 58c95070

arch/arm/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#define KVM_PRIVATE_MEM_SLOTS 4

#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

#define KVM_HAVE_ONE_REG

#define KVM_HALT_POLL_NS_DEFAULT 500000



#define KVM_VCPU_MAX_FEATURES 2

arch/arm64/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#define KVM_USER_MEM_SLOTS 32

#define KVM_PRIVATE_MEM_SLOTS 4

#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

#define KVM_HALT_POLL_NS_DEFAULT 500000



#include <kvm/arm_vgic.h>

#include <kvm/arm_arch_timer.h>

arch/mips/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ 
#define KVM_PRIVATE_MEM_SLOTS 	0



#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

#define KVM_HALT_POLL_NS_DEFAULT 500000

arch/powerpc/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ 
#ifdef CONFIG_KVM_MMIO

#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

#endif

#define KVM_HALT_POLL_NS_DEFAULT 500000



/* These values are internal and can be increased later */

#define KVM_NR_IRQCHIPS          1

arch/s390/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
 */

#define KVM_NR_IRQCHIPS 1

#define KVM_IRQCHIP_NUM_PINS 4096

#define KVM_HALT_POLL_NS_DEFAULT 0



#define SIGP_CTRL_C		0x80

#define SIGP_CTRL_SCN_MASK	0x3f