From 2b8819c6eee517c1582983773f8555bb3f9ed645 Mon Sep 17 00:00:00 2001 From: Victor Kaplansky Date: Wed, 11 Nov 2015 16:26:02 +0200 Subject: vhost-user: modify SET_LOG_BASE to pass mmap size and offset Unlike the kernel, vhost-user application accesses log table by mmaping it to its user space. This change adds two new fields to VhostUserMsg payload: mmap_size, and mmap_offset and make QEMU to pass the to vhost-user application in VHOST_USER_SET_LOG_BASE request. Signed-off-by: Victor Kaplansky Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- docs/specs/vhost-user.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'docs') diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt index e0d71e27e6..eb8f2b2020 100644 --- a/docs/specs/vhost-user.txt +++ b/docs/specs/vhost-user.txt @@ -98,6 +98,7 @@ typedef struct VhostUserMsg { struct vhost_vring_state state; struct vhost_vring_addr addr; VhostUserMemory memory; + VhostUserLog log; }; } QEMU_PACKED VhostUserMsg; @@ -282,7 +283,12 @@ Message types Master payload: u64 Slave payload: N/A - Sets the logging base address. + Sets logging shared memory space. + When slave has VHOST_USER_PROTOCOL_F_LOG_SHMFD protocol + feature, the log memory fd is provided in the ancillary data of + VHOST_USER_SET_LOG_BASE message, the size and offset of shared + memory area provided in the message. + * VHOST_USER_SET_LOG_FD -- cgit v1.2.3