Re: [PATCH v5 1/2] xen/pci: Refactor PCI MSI intercept related code

[Jan Beulich <jbeulich@xxxxxxxx>]

On 10.05.2021 17:47, Rahul Singh wrote:
> --- /dev/null
> +++ b/xen/drivers/passthrough/msi-intercept.c
> @@ -0,0 +1,55 @@
> +/*
> + * Copyright (C) 2008,  Netronome Systems, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along 
> with
> + * this program; If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <xen/init.h>
> +#include <xen/pci.h>
> +#include <asm/msi.h>
> +#include <asm/hvm/io.h>
> +
> +int pdev_msix_assign(struct domain *d, struct pci_dev *pdev)
> +{
> +    int rc;
> +
> +    if ( pdev->msix )
> +    {
> +        rc = pci_reset_msix_state(pdev);
> +        if ( rc )
> +            return rc;
> +        msixtbl_init(d);
> +    }
> +
> +    return 0;
> +}
> +
> +void pdev_dump_msi(const struct pci_dev *pdev)
> +{
> +    const struct msi_desc *msi;
> +
> +    printk("- MSIs < ");
> +    list_for_each_entry ( msi, &pdev->msi_list, list )
> +        printk("%d ", msi->irq);
> +    printk(">");
> +}

I guess I didn't look closely enough in earlier versions: I don't
see how either of the two functions is intercept related. If they
need separating out, they want to go into a file named msi.c (and,
as said before on other similar changes in the following patch,
not be keyed to HAS_PCI_MSI_INTERCEPT).

I'm sorry for noticing this only now.

Jan