| Subject | Re: [PATCH v2 12/30] s390/pci: get SHM information from list pci | From | Niklas Schnelle <> | Date | Thu, 27 Jan 2022 11:29:02 +0100 |
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On Fri, 2022-01-14 at 15:31 -0500, Matthew Rosato wrote: > KVM will need information on the special handle mask used to indicate > emulated devices. In order to obtain this, a new type of list pci call > must be made to gather the information. Extend clp_list_pci_req to > also fetch the model-dependent-data field that holds this mask. > > Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> > --- > arch/s390/include/asm/pci.h | 1 + > arch/s390/include/asm/pci_clp.h | 2 +- > arch/s390/pci/pci_clp.c | 28 +++++++++++++++++++++++++--- > 3 files changed, 27 insertions(+), 4 deletions(-) > ---8<--- > > +int zpci_get_mdd(u32 *mdd) > +{ > + struct clp_req_rsp_list_pci *rrb; > + u64 resume_token = 0; > + int nentries, rc; > + > + if (!mdd) > + return -EINVAL; > + > + rrb = clp_alloc_block(GFP_KERNEL); > + if (!rrb) > + return -ENOMEM; > + > + rc = clp_list_pci_req(rrb, &resume_token, &nentries, mdd); > + > + clp_free_block(rrb); > + return rc; > +} > +EXPORT_SYMBOL_GPL(zpci_get_mdd); > + > static int clp_base_slpc(struct clp_req *req, struct clp_req_rsp_slpc *lpcb) > { > unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
Looks good.
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
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