From: Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxxxxxxxx> Sent: Wednesday, November 10, 2021 11:45 AM
>
> Encapsulate arch dependencies in Hyper-V vPCI through a set of
> arch-dependent interfaces. Adding these arch specific interfaces will
> allow for an implementation for other architectures, such as arm64.
>
> There are no functional changes expected from this patch.
>
> Signed-off-by: Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxx>
> ---
> In v2, v3, v4 & v5:
> Changes are described in the cover letter. No change from v4 -> v5.
>
> arch/x86/include/asm/hyperv-tlfs.h | 33 ++++++++++++
> arch/x86/include/asm/mshyperv.h | 7 ---
> drivers/pci/controller/pci-hyperv.c | 79 ++++++++++++++++++++---------
> include/asm-generic/hyperv-tlfs.h | 33 ------------
> 4 files changed, 87 insertions(+), 65 deletions(-)
>
[snip]
> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
> index eaec915ffe62..03e07a4f0e3f 100644
> --- a/drivers/pci/controller/pci-hyperv.c
> +++ b/drivers/pci/controller/pci-hyperv.c
> @@ -43,9 +43,6 @@
> #include <linux/pci-ecam.h>
> #include <linux/delay.h>
> #include <linux/semaphore.h>
> -#include <linux/irqdomain.h>
> -#include <asm/irqdomain.h>
> -#include <asm/apic.h>
> #include <linux/irq.h>
> #include <linux/msi.h>
> #include <linux/hyperv.h>
> @@ -583,6 +580,42 @@ struct hv_pci_compl {
>
> static void hv_pci_onchannelcallback(void *context);
>
> +#ifdef CONFIG_X86
> +#define DELIVERY_MODE APIC_DELIVERY_MODE_FIXED
> +#define FLOW_HANDLER handle_edge_irq
> +#define FLOW_NAME "edge"
> +
> +static int hv_pci_irqchip_init(void)
> +{
> + return 0;
> +}
> +
> +static struct irq_domain *hv_pci_get_root_domain(void)
> +{
> + return x86_vector_domain;
> +}
> +
> +static unsigned int hv_msi_get_int_vector(struct irq_data *data)
> +{
> + struct irq_cfg *cfg = irqd_cfg(data);
> +
> + return cfg->vector;
> +}
> +
> +static void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry,
> + struct msi_desc *msi_desc)
> +{
> + msi_entry->address.as_uint32 = msi_desc->msg.address_lo;
> + msi_entry->data.as_uint32 = msi_desc->msg.data;
> +}
> +
> +static int hv_msi_prepare(struct irq_domain *domain, struct device *dev,
> + int nvec, msi_alloc_info_t *info)
> +{
> + return pci_msi_prepare(domain, dev, nvec, info);
> +}
> +#endif // CONFIG_X86
Nit: Use "C" style comments. I.e.:
#endif /* CONFIG_X86 */
Michael
