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linux/drivers/kvm
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Jeremy Fitzhardinge 464d1a78fb [PATCH] i386: Convert i386 PDA code to use %fs 
Convert the PDA code to use %fs rather than %gs as the segment for
per-processor data.  This is because some processors show a small but
measurable performance gain for reloading a NULL segment selector (as %fs
generally is in user-space) versus a non-NULL one (as %gs generally is).

On modern processors the difference is very small, perhaps undetectable.
Some old AMD "K6 3D+" processors are noticably slower when %fs is used
rather than %gs; I have no idea why this might be, but I think they're
sufficiently rare that it doesn't matter much.

This patch also fixes the math emulator, which had not been adjusted to
match the changed struct pt_regs.

[frederik.deweerdt@gmail.com: fixit with gdb]
[mingo@elte.hu: Fix KVM too]

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Ian Campbell <Ian.Campbell@XenSource.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Zachary Amsden <zach@vmware.com>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2007-02-13 13:26:20 +01:00
..
Kconfig [PATCH] KVM: Put KVM in a new Virtualization menu 2006-12-13 09:05:46 -08:00
kvm_main.c [PATCH] KVM: Host suspend/resume support 2007-02-12 09:48:41 -08:00
kvm_svm.h [PATCH] KVM: Replace __x86_64__ with CONFIG_X86_64 2006-12-13 09:05:46 -08:00
kvm_vmx.h [PATCH] KVM: Replace __x86_64__ with CONFIG_X86_64 2006-12-13 09:05:46 -08:00
kvm.h [PATCH] KVM: cpu hotplug support 2007-02-12 09:48:41 -08:00
Makefile [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00
mmu.c [PATCH] misc NULL noise removal 2007-02-09 09:14:07 -08:00
paging_tmpl.h [PATCH] kvm: Fix gva_to_gpa() 2007-02-12 09:48:40 -08:00
segment_descriptor.h [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00
svm.c [PATCH] KVM: cpu hotplug support 2007-02-12 09:48:41 -08:00
svm.h [PATCH] kvm: userspace interface 2006-12-10 09:57:22 -08:00
vmx.c [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
vmx.h [PATCH] kvm: vmx: handle triple faults by returning EXIT_REASON_SHUTDOWN to userspace 2007-02-12 09:48:40 -08:00
x86_emulate.c [PATCH] KVM: x86 emulator: fix bit string instructions 2007-01-23 07:52:06 -08:00
x86_emulate.h [PATCH] KVM: Replace __x86_64__ with CONFIG_X86_64 2006-12-13 09:05:46 -08:00