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b=gLtSX46vXqVCSWpBUFa18qFiRTXY58lqoR9Pe/7Lo45bubE5ouCs9U5GyMoxDztVvpr/I5TYTBhWsIGY0jPq88BzYefpvUBMV5qeyyU5ha8SWE96ZnPvBEtgvvAZ+E2vgGIakZjUGuAFeoDwnZ/kY95ka6maiuGrXDGId+Q94lktCAoFw7qHP3vTKCSeFK2Y2n1kYUbQLcDe8xQa39NmyvXVw13vH8IX7gT4Eyy20WqZCorp/sW/xdTy+4bCK11DT4AId78gS2mWBfhHKk5bSHic/xLjIbHxMJ9JhBK3yZL2jomUlhCINzIkrR/R0rA9t3r8T+rjAS7BE7Vckh+x1Q== From: John Levon To: qemu-devel@nongnu.org Cc: Tony Krowiak , Stefano Garzarella , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Peter Xu , Thomas Huth , Matthew Rosato , David Hildenbrand , "Michael S. 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charset="utf-8" Instead of requesting region information on demand with VFIO_DEVICE_GET_REGION_INFO, maintain a cache: this will become necessary for performance for vfio-user, where this call becomes a message over the control socket, so is of higher overhead than the traditional path. We will also need it to generalize region accesses, as that means we can't use ->config_offset for configuration space accesses, but must look up the region offset (if relevant) each time. Originally-by: John Johnson Signed-off-by: Elena Ufimtseva Signed-off-by: Jagannathan Raman Signed-off-by: John Levon --- hw/vfio/ccw.c | 5 ----- hw/vfio/container.c | 10 ++++++++++ hw/vfio/device.c | 31 +++++++++++++++++++++++++++---- hw/vfio/igd.c | 8 ++++---- hw/vfio/pci.c | 6 +++--- hw/vfio/region.c | 2 +- include/hw/vfio/vfio-device.h | 1 + 7 files changed, 46 insertions(+), 17 deletions(-) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index dac8769925..14dee7cd19 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -504,7 +504,6 @@ static bool vfio_ccw_get_region(VFIOCCWDevice *vcdev, E= rror **errp) =20 vcdev->io_region_offset =3D info->offset; vcdev->io_region =3D g_malloc0(info->size); - g_free(info); =20 /* check for the optional async command region */ ret =3D vfio_device_get_region_info_type(vdev, VFIO_REGION_TYPE_CCW, @@ -517,7 +516,6 @@ static bool vfio_ccw_get_region(VFIOCCWDevice *vcdev, E= rror **errp) } vcdev->async_cmd_region_offset =3D info->offset; vcdev->async_cmd_region =3D g_malloc0(info->size); - g_free(info); } =20 ret =3D vfio_device_get_region_info_type(vdev, VFIO_REGION_TYPE_CCW, @@ -530,7 +528,6 @@ static bool vfio_ccw_get_region(VFIOCCWDevice *vcdev, E= rror **errp) } vcdev->schib_region_offset =3D info->offset; vcdev->schib_region =3D g_malloc(info->size); - g_free(info); } =20 ret =3D vfio_device_get_region_info_type(vdev, VFIO_REGION_TYPE_CCW, @@ -544,7 +541,6 @@ static bool vfio_ccw_get_region(VFIOCCWDevice *vcdev, E= rror **errp) } vcdev->crw_region_offset =3D info->offset; vcdev->crw_region =3D g_malloc(info->size); - g_free(info); } =20 return true; @@ -554,7 +550,6 @@ out_err: g_free(vcdev->schib_region); g_free(vcdev->async_cmd_region); g_free(vcdev->io_region); - g_free(info); return false; } =20 diff --git a/hw/vfio/container.c b/hw/vfio/container.c index 37b1217fd8..61333d7fc4 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -857,6 +857,16 @@ static bool vfio_device_get(VFIOGroup *group, const ch= ar *name, =20 static void vfio_device_put(VFIODevice *vbasedev) { + if (vbasedev->reginfo !=3D NULL) { + int i; + + for (i =3D 0; i < vbasedev->num_regions; i++) { + g_free(vbasedev->reginfo[i]); + } + g_free(vbasedev->reginfo); + vbasedev->reginfo =3D NULL; + } + if (!vbasedev->group) { return; } diff --git a/hw/vfio/device.c b/hw/vfio/device.c index 2966171118..102fa5a9b4 100644 --- a/hw/vfio/device.c +++ b/hw/vfio/device.c @@ -205,6 +205,17 @@ int vfio_device_get_region_info(VFIODevice *vbasedev, = int index, { size_t argsz =3D sizeof(struct vfio_region_info); =20 + /* create region info cache */ + if (vbasedev->reginfo =3D=3D NULL) { + vbasedev->reginfo =3D g_new0(struct vfio_region_info *, + vbasedev->num_regions); + } + /* check cache */ + if (vbasedev->reginfo[index] !=3D NULL) { + *info =3D vbasedev->reginfo[index]; + return 0; + } + *info =3D g_malloc0(argsz); =20 (*info)->index =3D index; @@ -224,6 +235,9 @@ retry: goto retry; } =20 + /* fill cache */ + vbasedev->reginfo[index] =3D *info; + return 0; } =20 @@ -242,7 +256,6 @@ int vfio_device_get_region_info_type(VFIODevice *vbased= ev, uint32_t type, =20 hdr =3D vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE); if (!hdr) { - g_free(*info); continue; } =20 @@ -254,8 +267,6 @@ int vfio_device_get_region_info_type(VFIODevice *vbased= ev, uint32_t type, if (cap_type->type =3D=3D type && cap_type->subtype =3D=3D subtype= ) { return 0; } - - g_free(*info); } =20 *info =3D NULL; @@ -264,7 +275,7 @@ int vfio_device_get_region_info_type(VFIODevice *vbased= ev, uint32_t type, =20 bool vfio_device_has_region_cap(VFIODevice *vbasedev, int region, uint16_t= cap_type) { - g_autofree struct vfio_region_info *info =3D NULL; + struct vfio_region_info *info =3D NULL; bool ret =3D false; =20 if (!vfio_device_get_region_info(vbasedev, region, &info)) { @@ -427,6 +438,16 @@ void vfio_device_detach(VFIODevice *vbasedev) VFIO_IOMMU_GET_CLASS(vbasedev->bcontainer)->detach_device(vbasedev); } =20 +static void vfio_device_get_all_region_info(VFIODevice *vbasedev) +{ + struct vfio_region_info *info; + int i; + + for (i =3D 0; i < vbasedev->num_regions; i++) { + vfio_device_get_region_info(vbasedev, i, &info); + } +} + void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainerBase *bcontain= er, struct vfio_device_info *info) { @@ -439,4 +460,6 @@ void vfio_device_prepare(VFIODevice *vbasedev, VFIOCont= ainerBase *bcontainer, QLIST_INSERT_HEAD(&bcontainer->device_list, vbasedev, container_next); =20 QLIST_INSERT_HEAD(&vfio_device_list, vbasedev, global_next); + + vfio_device_get_all_region_info(vbasedev); } diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c index e1cba16399..d70da1ce38 100644 --- a/hw/vfio/igd.c +++ b/hw/vfio/igd.c @@ -198,7 +198,7 @@ static bool vfio_pci_igd_opregion_init(VFIOPCIDevice *v= dev, =20 static bool vfio_pci_igd_setup_opregion(VFIOPCIDevice *vdev, Error **errp) { - g_autofree struct vfio_region_info *opregion =3D NULL; + struct vfio_region_info *opregion =3D NULL; int ret; =20 /* Hotplugging is not supported for opregion access */ @@ -361,8 +361,8 @@ static int vfio_pci_igd_lpc_init(VFIOPCIDevice *vdev, =20 static bool vfio_pci_igd_setup_lpc_bridge(VFIOPCIDevice *vdev, Error **err= p) { - g_autofree struct vfio_region_info *host =3D NULL; - g_autofree struct vfio_region_info *lpc =3D NULL; + struct vfio_region_info *host =3D NULL; + struct vfio_region_info *lpc =3D NULL; PCIDevice *lpc_bridge; int ret; =20 @@ -526,7 +526,7 @@ static bool vfio_pci_igd_config_quirk(VFIOPCIDevice *vd= ev, Error **errp) * - OpRegion * - Same LPC bridge and Host bridge VID/DID/SVID/SSID as host */ - g_autofree struct vfio_region_info *rom =3D NULL; + struct vfio_region_info *rom =3D NULL; =20 legacy_mode_enabled =3D true; info_report("IGD legacy mode enabled, " diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index c3842d2f8d..b40d5abdfd 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -882,8 +882,8 @@ static void vfio_update_msi(VFIOPCIDevice *vdev) =20 static void vfio_pci_load_rom(VFIOPCIDevice *vdev) { - g_autofree struct vfio_region_info *reg_info =3D NULL; VFIODevice *vbasedev =3D &vdev->vbasedev; + struct vfio_region_info *reg_info =3D NULL; uint64_t size; off_t off =3D 0; ssize_t bytes; @@ -2721,7 +2721,7 @@ static VFIODeviceOps vfio_pci_ops =3D { bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp) { VFIODevice *vbasedev =3D &vdev->vbasedev; - g_autofree struct vfio_region_info *reg_info =3D NULL; + struct vfio_region_info *reg_info =3D NULL; int ret; =20 ret =3D vfio_device_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDE= X, ®_info); @@ -2786,7 +2786,7 @@ bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **e= rrp) static bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) { VFIODevice *vbasedev =3D &vdev->vbasedev; - g_autofree struct vfio_region_info *reg_info =3D NULL; + struct vfio_region_info *reg_info =3D NULL; struct vfio_irq_info irq_info; int i, ret =3D -1; =20 diff --git a/hw/vfio/region.c b/hw/vfio/region.c index 04bf9eb098..ef2630cac3 100644 --- a/hw/vfio/region.c +++ b/hw/vfio/region.c @@ -182,7 +182,7 @@ static int vfio_setup_region_sparse_mmaps(VFIORegion *r= egion, int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *regio= n, int index, const char *name) { - g_autofree struct vfio_region_info *info =3D NULL; + struct vfio_region_info *info =3D NULL; int ret; =20 ret =3D vfio_device_get_region_info(vbasedev, index, &info); diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h index 9522a09c48..967b07cd89 100644 --- a/include/hw/vfio/vfio-device.h +++ b/include/hw/vfio/vfio-device.h @@ -81,6 +81,7 @@ typedef struct VFIODevice { IOMMUFDBackend *iommufd; VFIOIOASHwpt *hwpt; QLIST_ENTRY(VFIODevice) hwpt_next; + struct vfio_region_info **reginfo; } VFIODevice; =20 struct VFIODeviceOps { --=20 2.34.1