diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-08-18 11:06:54 +0800 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2011-08-19 13:41:55 +0300 |
| commit | 540f0ff98c14e03d098bbde2586cdcd27284809d (patch) | |
| tree | edcfe3120827603cf3fe95ae031858fd9f47485c /tools | |
| parent | a66148aa576dbd1ffd69694343cedf8adc332930 (diff) | |
kvm tools: fix repeated io emulation
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 <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | 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 2d69ae4c3397..6b0bd30ce751 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(); |