When kvm emulates repeation io read instruction, it can exit to user-space with 'count' > 1, we need to emulate io access for many times
Signed-off-by: Xiao Guangrong <[email protected]> --- tools/kvm/ioport.c | 17 +++++++++++------ 1 files changed, 11 insertions(+), 6 deletions(-) diff --git a/tools/kvm/ioport.c b/tools/kvm/ioport.c index 2d69ae4..6b0bd30 100644 --- a/tools/kvm/ioport.c +++ b/tools/kvm/ioport.c @@ -129,6 +129,7 @@ bool kvm__emulate_io(struct kvm *kvm, u16 port, void *data, int direction, int s struct ioport_operations *ops; bool ret = false; struct ioport *entry; + void *ptr = data; br_read_lock(); entry = ioport_search(&ioport_tree, port); @@ -137,12 +138,16 @@ bool kvm__emulate_io(struct kvm *kvm, u16 port, void *data, int direction, int s ops = entry->ops; - if (direction == KVM_EXIT_IO_IN) { - if (ops->io_in) - ret = ops->io_in(entry, kvm, port, data, size, count); - } else { - if (ops->io_out) - ret = ops->io_out(entry, kvm, port, data, size, count); + while (count--) { + if (direction == KVM_EXIT_IO_IN) { + if (ops->io_in) + ret = ops->io_in(entry, kvm, port, ptr, size, count); + } else { + if (ops->io_out) + ret = ops->io_out(entry, kvm, port, ptr, size, count); + } + + ptr += size; } br_read_unlock(); -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
