From 6180c8f19164a103c59184993b581858bc132df6 Mon Sep 17 00:00:00 2001 From: Long Li Date: Mon, 5 May 2025 17:56:34 -0700 Subject: [PATCH] uio_hv_generic: Use correct size for interrupt and monitor pages commit c951ab8fd3589cf6991ed4111d2130816f2e3ac2 upstream. 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 Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1746492997-4599-3-git-send-email-longli@linuxonhyperv.com Signed-off-by: Wei Liu Message-ID: <1746492997-4599-3-git-send-email-longli@linuxonhyperv.com> Signed-off-by: Greg Kroah-Hartman --- 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 3343cac607379..67cfe838a7874 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -288,13 +288,13 @@ 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; pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE); -- 2.47.3