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charset="utf-8" On guest reboot or on GBPA update, attach a nested HWPT based on the GPBA.ABORT bit which either aborts all incoming transactions or bypasses them. Reviewed-by: Eric Auger Reviewed-by: Nicolin Chen Tested-by: Eric Auger Tested-by: Zhangfei Gao Signed-off-by: Shameer Kolothum Reviewed-by: Jonathan Cameron --- hw/arm/smmuv3-accel.c | 36 ++++++++++++++++++++++++++++++++++++ hw/arm/smmuv3-accel.h | 9 +++++++++ hw/arm/smmuv3.c | 2 ++ 3 files changed, 47 insertions(+) diff --git a/hw/arm/smmuv3-accel.c b/hw/arm/smmuv3-accel.c index 877b7e0e17..c125974d12 100644 --- a/hw/arm/smmuv3-accel.c +++ b/hw/arm/smmuv3-accel.c @@ -499,6 +499,42 @@ static const PCIIOMMUOps smmuv3_accel_ops =3D { .unset_iommu_device =3D smmuv3_accel_unset_iommu_device, }; =20 +/* Based on SMUUv3 GPBA.ABORT configuration, attach a corresponding HWPT */ +bool smmuv3_accel_attach_gbpa_hwpt(SMMUv3State *s, Error **errp) +{ + SMMUv3AccelState *accel =3D s->s_accel; + SMMUv3AccelDevice *accel_dev; + Error *local_err =3D NULL; + bool all_ok =3D true; + uint32_t hwpt_id; + + if (!accel || !accel->viommu) { + return true; + } + + hwpt_id =3D smmuv3_accel_gbpa_hwpt(s, accel); + QLIST_FOREACH(accel_dev, &accel->device_list, next) { + if (!host_iommu_device_iommufd_attach_hwpt(accel_dev->idev, hwpt_i= d, + &local_err)) { + error_append_hint(&local_err, "Failed to attach GBPA hwpt %u f= or " + "idev devid %u", hwpt_id, accel_dev->idev->d= evid); + error_report_err(local_err); + local_err =3D NULL; + all_ok =3D false; + } + } + if (!all_ok) { + error_setg(errp, "Failed to attach all GBPA based HWPTs properly"); + } + return all_ok; +} + +void smmuv3_accel_reset(SMMUv3State *s) +{ + /* Attach a HWPT based on GBPA reset value */ + smmuv3_accel_attach_gbpa_hwpt(s, NULL); +} + static void smmuv3_accel_as_init(SMMUv3State *s) { =20 diff --git a/hw/arm/smmuv3-accel.h b/hw/arm/smmuv3-accel.h index 4e20b646dc..c7ed4dce3a 100644 --- a/hw/arm/smmuv3-accel.h +++ b/hw/arm/smmuv3-accel.h @@ -46,6 +46,8 @@ bool smmuv3_accel_install_ste(SMMUv3State *s, SMMUDevice = *sdev, int sid, Error **errp); bool smmuv3_accel_install_ste_range(SMMUv3State *s, SMMUSIDRange *range, Error **errp); +bool smmuv3_accel_attach_gbpa_hwpt(SMMUv3State *s, Error **errp); +void smmuv3_accel_reset(SMMUv3State *s); #else static inline void smmuv3_accel_init(SMMUv3State *s) { @@ -62,6 +64,13 @@ smmuv3_accel_install_ste_range(SMMUv3State *s, SMMUSIDRa= nge *range, { return true; } +static inline bool smmuv3_accel_attach_gbpa_hwpt(SMMUv3State *s, Error **e= rrp) +{ + return true; +} +static inline void smmuv3_accel_reset(SMMUv3State *s) +{ +} #endif =20 #endif /* HW_ARM_SMMUV3_ACCEL_H */ diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c index 7e29284267..7a32afd800 100644 --- a/hw/arm/smmuv3.c +++ b/hw/arm/smmuv3.c @@ -1600,6 +1600,7 @@ static MemTxResult smmu_writel(SMMUv3State *s, hwaddr= offset, if (data & R_GBPA_UPDATE_MASK) { /* Ignore update bit as write is synchronous. */ s->gbpa =3D data & ~R_GBPA_UPDATE_MASK; + smmuv3_accel_attach_gbpa_hwpt(s, &local_err); } break; case A_STRTAB_BASE: /* 64b */ @@ -1887,6 +1888,7 @@ static void smmu_reset_exit(Object *obj, ResetType ty= pe) } =20 smmuv3_init_regs(s); + smmuv3_accel_reset(s); } =20 static void smmu_realize(DeviceState *d, Error **errp) --=20 2.43.0