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charset="utf-8" From: Jagannathan Raman cache VFIO_DEVICE_GET_REGION_INFO results to reduce memory alloc/free cycles and as prep work for vfio-user 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/common.c | 12 ++++++++++++ hw/vfio/container.c | 10 ++++++++++ hw/vfio/helpers.c | 21 ++++++++++++++++----- hw/vfio/igd.c | 8 ++++---- hw/vfio/pci.c | 8 ++++---- include/hw/vfio/vfio-common.h | 1 + 7 files changed, 47 insertions(+), 18 deletions(-) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 67bc137f9b..22378d50bc 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -510,7 +510,6 @@ 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_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, @@ -523,7 +522,6 @@ 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_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, @@ -536,7 +534,6 @@ 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_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, @@ -550,7 +547,6 @@ 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; @@ -560,7 +556,6 @@ 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/common.c b/hw/vfio/common.c index a8243c0c58..c0a6263678 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1551,6 +1551,16 @@ retry: return info; } =20 +static void vfio_get_all_regions(VFIODevice *vbasedev) +{ + struct vfio_region_info *info; + int i; + + for (i =3D 0; i < vbasedev->num_regions; i++) { + vfio_get_region_info(vbasedev, i, &info); + } +} + void vfio_prepare_device(VFIODevice *vbasedev, VFIOContainerBase *bcontain= er, VFIOGroup *group, struct vfio_device_info *info) { @@ -1568,6 +1578,8 @@ void vfio_prepare_device(VFIODevice *vbasedev, VFIOCo= ntainerBase *bcontainer, } =20 QLIST_INSERT_HEAD(&vfio_device_list, vbasedev, global_next); + + vfio_get_all_regions(vbasedev); } =20 bool vfio_attach_device_by_iommu_type(const char *iommu_type, char *name, diff --git a/hw/vfio/container.c b/hw/vfio/container.c index b1a58b0579..e0fd5a153b 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -888,6 +888,16 @@ static bool vfio_get_device(VFIOGroup *group, const ch= ar *name, =20 static void vfio_put_base_device(VFIODevice *vbasedev) { + if (vbasedev->regions !=3D NULL) { + int i; + + for (i =3D 0; i < vbasedev->num_regions; i++) { + g_free(vbasedev->regions[i]); + } + g_free(vbasedev->regions); + vbasedev->regions =3D NULL; + } + if (!vbasedev->group) { return; } diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c index 913796f437..a8951176b8 100644 --- a/hw/vfio/helpers.c +++ b/hw/vfio/helpers.c @@ -344,7 +344,7 @@ 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_get_region_info(vbasedev, index, &info); @@ -561,6 +561,17 @@ int vfio_get_region_info(VFIODevice *vbasedev, int ind= ex, { size_t argsz =3D sizeof(struct vfio_region_info); =20 + /* create region cache */ + if (vbasedev->regions =3D=3D NULL) { + vbasedev->regions =3D g_new0(struct vfio_region_info *, + vbasedev->num_regions); + } + /* check cache */ + if (vbasedev->regions[index] !=3D NULL) { + *info =3D vbasedev->regions[index]; + return 0; + } + *info =3D g_malloc0(argsz); =20 (*info)->index =3D index; @@ -580,6 +591,9 @@ retry: goto retry; } =20 + /* fill cache */ + vbasedev->regions[index] =3D *info; + return 0; } =20 @@ -598,7 +612,6 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint= 32_t type, =20 hdr =3D vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE); if (!hdr) { - g_free(*info); continue; } =20 @@ -610,8 +623,6 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint= 32_t type, if (cap_type->type =3D=3D type && cap_type->subtype =3D=3D subtype= ) { return 0; } - - g_free(*info); } =20 *info =3D NULL; @@ -620,7 +631,7 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint= 32_t type, =20 bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_ty= pe) { - g_autofree struct vfio_region_info *info =3D NULL; + struct vfio_region_info *info =3D NULL; bool ret =3D false; =20 if (!vfio_get_region_info(vbasedev, region, &info)) { diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c index 0740a5dd8c..d2f9300e9a 100644 --- a/hw/vfio/igd.c +++ b/hw/vfio/igd.c @@ -553,10 +553,10 @@ void vfio_probe_igd_bar0_quirk(VFIOPCIDevice *vdev, i= nt nr) =20 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr) { - g_autofree struct vfio_region_info *rom =3D NULL; - g_autofree struct vfio_region_info *opregion =3D NULL; - g_autofree struct vfio_region_info *host =3D NULL; - g_autofree struct vfio_region_info *lpc =3D NULL; + struct vfio_region_info *rom =3D NULL; + struct vfio_region_info *opregion =3D NULL; + struct vfio_region_info *host =3D NULL; + struct vfio_region_info *lpc =3D NULL; VFIOQuirk *quirk; VFIOIGDQuirk *igd; PCIDevice *lpc_bridge; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 17080b9dc0..8e6f20b3ad 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -879,7 +879,7 @@ 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; + struct vfio_region_info *reg_info =3D NULL; uint64_t size; off_t off =3D 0; ssize_t bytes; @@ -2666,7 +2666,7 @@ 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_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDEX, ®= _info); @@ -2731,7 +2731,7 @@ 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 =3D { .argsz =3D sizeof(irq_info) }; int i, ret =3D -1; =20 @@ -3135,7 +3135,7 @@ static void vfio_realize(PCIDevice *pdev, Error **err= p) =20 if (!vdev->igd_opregion && vdev->features & VFIO_FEATURE_ENABLE_IGD_OPREGION) { - g_autofree struct vfio_region_info *opregion =3D NULL; + struct vfio_region_info *opregion =3D NULL; =20 if (vdev->pdev.qdev.hotplugged) { error_setg(errp, diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index da2c5947c4..59348b81aa 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -151,6 +151,7 @@ typedef struct VFIODevice { IOMMUFDBackend *iommufd; VFIOIOASHwpt *hwpt; QLIST_ENTRY(VFIODevice) hwpt_next; + struct vfio_region_info **regions; } VFIODevice; =20 struct VFIODeviceOps { --=20 2.34.1