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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741348444; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vP08kGh1gBxCAKNj7Mea7eFddJb1NSFNTaj+GwlfRgc=; b=cAbDG6R3DnI8lkF80ug7eTwfZbxbc88xmWerIwE7U4ta8DloVfJw3sBskWVNTSOqKZycYC kDE0UfIDhFG/kF9pY1t0hI+t2QBj6IlCJpsYKd0pLGrxqCk5c7UuKIajbfFUifUtu97CNL y93N45pCBIRRjeCeXJIQkeGE5xbm9ws= X-MC-Unique: BDwsAU0sNzqTptpSMzn6-A-1 X-Mimecast-MFC-AGG-ID: BDwsAU0sNzqTptpSMzn6-A_1741348441 From: Thomas Huth To: qemu-devel@nongnu.org Cc: Stefan Hajnoczi , Matthew Rosato , Niklas Schnelle Subject: [PULL 15/15] s390x/pci: indicate QEMU supports relaxed translation for passthrough Date: Fri, 7 Mar 2025 12:53:14 +0100 Message-ID: <20250307115314.1096373-16-thuth@redhat.com> In-Reply-To: <20250307115314.1096373-1-thuth@redhat.com> References: <20250307115314.1096373-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Matthew Rosato Specifying this bit in the guest CLP response indicates that the guest can optionally choose to skip translation and instead use identity-mapped operations. Tested-by: Niklas Schnelle Reviewed-by: Niklas Schnelle Signed-off-by: Matthew Rosato Message-ID: <20250226210013.238349-3-mjrosato@linux.ibm.com> Signed-off-by: Thomas Huth --- include/hw/s390x/s390-pci-clp.h | 1 + hw/s390x/s390-pci-vfio.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/include/hw/s390x/s390-pci-clp.h b/include/hw/s390x/s390-pci-cl= p.h index 03b7f9ba5f7..6a635d693ba 100644 --- a/include/hw/s390x/s390-pci-clp.h +++ b/include/hw/s390x/s390-pci-clp.h @@ -158,6 +158,7 @@ typedef struct ClpRspQueryPciGrp { #define CLP_RSP_QPCIG_MASK_NOI 0xfff uint16_t i; uint8_t version; +#define CLP_RSP_QPCIG_MASK_RTR 0x20 #define CLP_RSP_QPCIG_MASK_FRAME 0x2 #define CLP_RSP_QPCIG_MASK_REFRESH 0x1 uint8_t fr; diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c index 443e2229127..6236ac7f1e6 100644 --- a/hw/s390x/s390-pci-vfio.c +++ b/hw/s390x/s390-pci-vfio.c @@ -238,8 +238,11 @@ static void s390_pci_read_group(S390PCIBusDevice *pbde= v, pbdev->pci_group =3D s390_group_create(pbdev->zpci_fn.pfgid, start= _gid); =20 resgrp =3D &pbdev->pci_group->zpci_group; + if (pbdev->rtr_avail) { + resgrp->fr |=3D CLP_RSP_QPCIG_MASK_RTR; + } if (cap->flags & VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH) { - resgrp->fr =3D 1; + resgrp->fr |=3D CLP_RSP_QPCIG_MASK_REFRESH; } resgrp->dasm =3D cap->dasm; resgrp->msia =3D cap->msi_addr; --=20 2.48.1