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Subject: RE: [PATCH 08/11] transport-pci: Introduce virtio extended capability
> From: Michael S. Tsirkin <mst@redhat.com> > Sent: Wednesday, April 5, 2023 1:11 AM > > > > +struct virtio_pcie_ext_cap { > > > > + struct pcie_ext_cap pcie_ecap; > > > > + u8 cfg_type; /* Identifies the structure. */ > > > > + u8 bar; /* Index of the BAR where its located */ > > > > + u8 id; /* Multiple capabilities of the same type */ > > > > + u8 zero_padding[1]; > > > > + le64 offset; /* Offset with the bar */ > > > > + le64 length; /* Length of the structure, in bytes. */ > > > > + u8 data[]; /* Optional variable length data */ > > > > > > Maybe le64 data[], for alignment? > > > > > It gets harder to decode (typecasting ..) if its string with le64 data type. > > In what language? In C you have to cast anyway, string is char *, often signed, > not u8. > > > I will extend the comment, > > > > + u8 data[]; /* Optional variable length data, must be aligned > > + to 8 bytes */ > > I'd keep it le64 or u64, it is highly unlikely we'll pass strings through this > interface anyway. Ok. will change. What about rest of the patches? If we proceed using MMR interface, rest of the patches are fine?
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