From: longli@linuxonhyperv.com longli@linuxonhyperv.com Sent: Monday, May 5, 2025 5:57 PM
Interrupt and monitor pages should be in Hyper-V page size (4k bytes). This can be different from the system page size.
This size is read and used by the user-mode program to determine the mapped data region. An example of such user-mode program is the VMBus driver in DPDK.
Cc: stable@vger.kernel.org Fixes: 95096f2fbd10 ("uio-hv-generic: new userspace i/o driver for VMBus") Signed-off-by: Long Li longli@microsoft.com
drivers/uio/uio_hv_generic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 1b19b5647495..08385b04c4ab 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -287,13 +287,13 @@ hv_uio_probe(struct hv_device *dev, pdata->info.mem[INT_PAGE_MAP].name = "int_page"; pdata->info.mem[INT_PAGE_MAP].addr = (uintptr_t)vmbus_connection.int_page;
- pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE;
pdata->info.mem[INT_PAGE_MAP].size = HV_HYP_PAGE_SIZE; pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
pdata->info.mem[MON_PAGE_MAP].name = "monitor_page"; pdata->info.mem[MON_PAGE_MAP].addr = (uintptr_t)vmbus_connection.monitor_pages[1];
- pdata->info.mem[MON_PAGE_MAP].size = PAGE_SIZE;
pdata->info.mem[MON_PAGE_MAP].size = HV_HYP_PAGE_SIZE; pdata->info.mem[MON_PAGE_MAP].memtype = UIO_MEM_LOGICAL;
if (channel->device_id == HV_NIC) {
-- 2.34.1
Reviewed-by: Michael Kelley mhklinux@outlook.com