Commit c951ab8f authored by Long Li's avatar Long Li Committed by Wei Liu
Browse files

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: 95096f2f ("uio-hv-generic: new userspace i/o driver for VMBus")
Signed-off-by: default avatarLong Li <longli@microsoft.com>
Reviewed-by: default avatarMichael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1746492997-4599-3-git-send-email-longli@linuxonhyperv.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
Message-ID: <1746492997-4599-3-git-send-email-longli@linuxonhyperv.com>
parent 09eea7ad

drivers/uio/uio_hv_generic.c

+2 −2
Original line number Diff line number Diff line
@@ -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) {