diff options
Diffstat (limited to 'vnet')
| -rw-r--r-- | vnet/vnet/devices/virtio/vhost-user.c | 43 | ||||
| -rw-r--r-- | vnet/vnet/devices/virtio/vhost-user.h | 2 |
2 files changed, 45 insertions, 0 deletions
diff --git a/vnet/vnet/devices/virtio/vhost-user.c b/vnet/vnet/devices/virtio/vhost-user.c index 046a02e3..6182ffa2 100644 --- a/vnet/vnet/devices/virtio/vhost-user.c +++ b/vnet/vnet/devices/virtio/vhost-user.c @@ -153,6 +153,45 @@ static inline void * map_guest_mem (vhost_user_intf_t * vui, uword addr) { int i; +#if __SSE4_2__ + __m128i rl, rh, al, ah, r; + al = _mm_set1_epi64x (addr + 1); + ah = _mm_set1_epi64x (addr); + + rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]); + rl = _mm_cmpgt_epi64 (al, rl); + rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]); + rh = _mm_cmpgt_epi64 (rh, ah); + r = _mm_and_si128 (rl, rh); + + rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]); + rl = _mm_cmpgt_epi64 (al, rl); + rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]); + rh = _mm_cmpgt_epi64 (rh, ah); + r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22); + + rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]); + rl = _mm_cmpgt_epi64 (al, rl); + rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]); + rh = _mm_cmpgt_epi64 (rh, ah); + r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44); + + rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]); + rl = _mm_cmpgt_epi64 (al, rl); + rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]); + rh = _mm_cmpgt_epi64 (rh, ah); + r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88); + + r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800)); + i = __builtin_ctzll (_mm_movemask_epi8 (r)); + + if (i < vui->nregions) + { + return (void *) (vui->region_mmap_addr[i] + addr - + vui->regions[i].guest_phys_addr); + } + +#else for (i = 0; i < vui->nregions; i++) { if ((vui->regions[i].guest_phys_addr <= addr) && @@ -163,6 +202,7 @@ map_guest_mem (vhost_user_intf_t * vui, uword addr) vui->regions[i].guest_phys_addr); } } +#endif DBG_VQ ("failed to map guest mem addr %llx", addr); return 0; } @@ -463,6 +503,9 @@ vhost_user_socket_read (unix_file_t * uf) vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED, fds[i], 0); + vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr; + vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr + + vui->regions[i].memory_size; DBG_SOCK ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx " diff --git a/vnet/vnet/devices/virtio/vhost-user.h b/vnet/vnet/devices/virtio/vhost-user.h index 91369c33..af4eb644 100644 --- a/vnet/vnet/devices/virtio/vhost-user.h +++ b/vnet/vnet/devices/virtio/vhost-user.h @@ -232,6 +232,8 @@ typedef struct u32 num_vrings; vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS]; void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS]; + u64 region_guest_addr_lo[VHOST_MEMORY_MAX_NREGIONS]; + u64 region_guest_addr_hi[VHOST_MEMORY_MAX_NREGIONS]; u32 region_mmap_fd[VHOST_MEMORY_MAX_NREGIONS]; vhost_user_vring_t vrings[2]; int virtio_net_hdr_sz; |