uio_hv_generic: Use correct size for interrupt and monitor pages

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>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1746492997-4599-3-git-send-email-longli@linuxonhyperv.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1746492997-4599-3-git-send-email-longli@linuxonhyperv.com>

diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index 69c1df0f4ca541e631b186f94469ad19b2fd5539..cc3a350dbbd588448810adcec04fe22b6dec2b7d 100644 (file)
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -274,13 +274,13 @@ 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) {