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| author | Matthew Rosato <mjrosato@linux.ibm.com> | 2025-02-26 16:00:13 -0500 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2025-03-07 09:24:00 +0100 |
| commit | d9b5dfc7122559e5b5959ecf534788b90c3dd102 (patch) | |
| tree | 9019e1c3eff45f2ded45ac42417c82a3be152d0d | |
| parent | dfcee1ea4c52ac60e0a06221eafb7b6253eb10c3 (diff) | |
| download | focaccia-qemu-d9b5dfc7122559e5b5959ecf534788b90c3dd102.tar.gz focaccia-qemu-d9b5dfc7122559e5b5959ecf534788b90c3dd102.zip | |
s390x/pci: indicate QEMU supports relaxed translation for passthrough
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 <schnelle@linux.ibm.com> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> Message-ID: <20250226210013.238349-3-mjrosato@linux.ibm.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
| -rw-r--r-- | hw/s390x/s390-pci-vfio.c | 5 | ||||
| -rw-r--r-- | include/hw/s390x/s390-pci-clp.h | 1 |
2 files changed, 5 insertions, 1 deletions
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c index 443e222912..6236ac7f1e 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 *pbdev, pbdev->pci_group = s390_group_create(pbdev->zpci_fn.pfgid, start_gid); resgrp = &pbdev->pci_group->zpci_group; + if (pbdev->rtr_avail) { + resgrp->fr |= CLP_RSP_QPCIG_MASK_RTR; + } if (cap->flags & VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH) { - resgrp->fr = 1; + resgrp->fr |= CLP_RSP_QPCIG_MASK_REFRESH; } resgrp->dasm = cap->dasm; resgrp->msia = cap->msi_addr; diff --git a/include/hw/s390x/s390-pci-clp.h b/include/hw/s390x/s390-pci-clp.h index 03b7f9ba5f..6a635d693b 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; |