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| author | Matthew Rosato <mjrosato@linux.ibm.com> | 2022-06-06 23:33:12 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@linux.ibm.com> | 2022-07-11 10:54:22 +0300 |
| commit | c68468ed3416ea88d7b14dabb1fa584c3a90cd85 (patch) | |
| tree | bba38e5590cc20f3c5ca1ebe93f3a72c5222addb /arch/s390/pci/pci_clp.c | |
| parent | 062f002485d4d5f26f9e8fbce831fd28c4b75ca5 (diff) | |
| download | linux-c68468ed3416ea88d7b14dabb1fa584c3a90cd85.tar.xz | |
s390/pci: stash associated GISA designation
For passthrough devices, we will need to know the GISA designation of the
guest if interpretation facilities are to be used. Setup to stash this in
the zdev and set a default of 0 (no GISA designation) for now; a subsequent
patch will set a valid GISA designation for passthrough devices.
Also, extend mpcific routines to specify this stashed designation as part
of the mpcific command.
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220606203325.110625-9-mjrosato@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci_clp.c')
| -rw-r--r-- | arch/s390/pci/pci_clp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 375e0a5120bc..d058c83467ef 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -229,12 +229,16 @@ static int clp_set_pci_fn(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as, u8 comma { struct clp_req_rsp_set_pci *rrb; int rc, retries = 100; + u32 gisa = 0; *fh = 0; rrb = clp_alloc_block(GFP_KERNEL); if (!rrb) return -ENOMEM; + if (command != CLP_SET_DISABLE_PCI_FN) + gisa = zdev->gisa; + do { memset(rrb, 0, sizeof(*rrb)); rrb->request.hdr.len = sizeof(rrb->request); @@ -243,6 +247,7 @@ static int clp_set_pci_fn(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as, u8 comma rrb->request.fh = zdev->fh; rrb->request.oc = command; rrb->request.ndas = nr_dma_as; + rrb->request.gisa = gisa; rc = clp_req(rrb, CLP_LPS_PCI); if (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY) { |