Michael Kelley 6941f67ad3 hv_netvsc: Calculate correct ring size when PAGE_SIZE is not 4 Kbytes ... Current code in netvsc_drv_init() incorrectly assumes that PAGE_SIZE is 4 Kbytes, which is wrong on ARM64 with 16K or 64K page size. As a result, the default VMBus ring buffer size on ARM64 with 64K page size is 8 Mbytes instead of the expected 512 Kbytes. While this doesn't break anything, a typical VM with 8 vCPUs and 8 netvsc channels wastes 120 Mbytes (8 channels * 2 ring buffers/channel * 7.5 Mbytes/ring buffer). Unfortunately, the module parameter specifying the ring buffer size is in units of 4 Kbyte pages. Ideally, it should be in units that are independent of PAGE_SIZE, but backwards compatibility prevents changing that now. Fix this by having netvsc_drv_init() hardcode 4096 instead of using PAGE_SIZE when calculating the ring buffer size in bytes. Also use the VMBUS_RING_SIZE macro to ensure proper alignment when running with page size larger than 4K. Cc: <stable@vger.kernel.org> # 5.15.x Fixes: 7aff79e297 ("Drivers: hv: Enable Hyper-V code to be built on ARM64") Signed-off-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/20240122162028.348885-1-mhklinux@outlook.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2024-01-23 17:19:42 -08:00
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hyperv_net.h	eth: add missing xdp.h includes in drivers	2023-08-03 08:38:07 -07:00
Kconfig	hv_netvsc: rndis_filter needs to select NLS	2023-12-01 20:12:24 -08:00
Makefile	hv_netvsc: Add XDP support	2020-01-25 10:43:19 +01:00
netvsc_bpf.c	hv_netvsc: Add support for XDP_REDIRECT	2022-04-11 18:25:47 -07:00
netvsc_drv.c	hv_netvsc: Calculate correct ring size when PAGE_SIZE is not 4 Kbytes	2024-01-23 17:19:42 -08:00
netvsc_trace.c
netvsc_trace.h
netvsc.c	hv_netvsc: fix netvsc_send_completion to avoid multiple message length checks	2023-10-11 09:19:01 +01:00
rndis_filter.c	hv_netvsc: remove duplicated including of slab.h	2023-12-15 12:19:00 +00:00