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| author | Keir Fraser <keir.fraser@citrix.com> | 2008-08-01 09:54:13 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2008-08-01 09:54:13 +0100 |
| commit | 8c715178a115fd4eab786653eb5fcc093a4a18fd (patch) | |
| tree | e8928dd9bfa125c22f553d97a99e31f6a08e73ac /tools | |
| parent | 37404be82b7448a4fb0d3136a65fc2421a33f8bc (diff) | |
| download | xen-8c715178a115fd4eab786653eb5fcc093a4a18fd.tar.gz xen-8c715178a115fd4eab786653eb5fcc093a4a18fd.tar.bz2 xen-8c715178a115fd4eab786653eb5fcc093a4a18fd.zip | |
ioemu, passthrough: fix corrupting register value in pt_pci_write_config().
I forgot to shift value read from real device. If the emulated
register offset is not aligned with 4 byte, the write emulation will
not be handled well because of corrupting register value read from
real device. The patch fixes this issue.
Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/ioemu/hw/pass-through.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/ioemu/hw/pass-through.c b/tools/ioemu/hw/pass-through.c index d1101addfd..428845f2c9 100644 --- a/tools/ioemu/hw/pass-through.c +++ b/tools/ioemu/hw/pass-through.c @@ -1101,7 +1101,8 @@ static void pt_pci_write_config(PCIDevice *d, uint32_t address, uint32_t val, if (reg_grp_entry == NULL) goto out; - /* adjust the write value to appropriate CFC-CFF window */ + /* adjust the read and write value to appropriate CFC-CFF window */ + read_val <<= ((address & 3) << 3); val <<= ((address & 3) << 3); emul_len = len; |