08c7228c50f8b27acba312c4d2f0c07d0ab6a06b |
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03-Jan-2013 |
Tom Knych <thomaswk@google.com> |
x86-kvm: only sync SREGS when doing address translation cpu_synchronize_state is 10x or more expensive on AMD then on intel. This makes all nand read/writes extremely slow (eg: mounting /system takes over a minute when KVM is enabled on AMD). Looking at hw/goldfish* all callers of cpu_synchronize_state want to do is translate virtual to physical addresses. You can do that with 1 ioctl (KVM_GET_SREGS). Performance on AMD is significant improved (matching intel) and intel is not affected. Converted all callers of cpu_synchronize_state in hw/goldfish-* to sync over only KVM_GET_SREGS when running in KVM mode. Change-Id: Id15c4e99c0f541527684fba23d639c9dee3525c6 Signed-off-by: Tom Knych <thomaswk@google.com>
/external/qemu/hw/goldfish_vmem.c
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