[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [XEN PATCH v10 4/5] tools: Add new function to get gsi from dev
On Mon, Jun 17, 2024 at 05:00:34PM +0800, Jiqian Chen wrote: > diff --git a/tools/include/xencall.h b/tools/include/xencall.h > index fc95ed0fe58e..750aab070323 100644 > --- a/tools/include/xencall.h > +++ b/tools/include/xencall.h > @@ -113,6 +113,8 @@ int xencall5(xencall_handle *xcall, unsigned int op, > uint64_t arg1, uint64_t arg2, uint64_t arg3, > uint64_t arg4, uint64_t arg5); > > +int xen_oscall_gsi_from_dev(xencall_handle *xcall, unsigned int sbdf); I don't think that an appropriate library for this new feature. libxencall is a generic lib to make hypercall. > /* Variant(s) of the above, as needed, returning "long" instead of "int". */ > long xencall2L(xencall_handle *xcall, unsigned int op, > uint64_t arg1, uint64_t arg2); > diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h > index 9ceca0cffc2f..a0381f74d24b 100644 > --- a/tools/include/xenctrl.h > +++ b/tools/include/xenctrl.h > @@ -1641,6 +1641,8 @@ int xc_physdev_unmap_pirq(xc_interface *xch, > uint32_t domid, > int pirq); > > +int xc_physdev_gsi_from_dev(xc_interface *xch, uint32_t sbdf); > + > /* > * LOGGING AND ERROR REPORTING > */ > diff --git a/tools/libs/call/core.c b/tools/libs/call/core.c > index 02c4f8e1aefa..6dae50c9a6ba 100644 > --- a/tools/libs/call/core.c > +++ b/tools/libs/call/core.c > @@ -173,6 +173,11 @@ int xencall5(xencall_handle *xcall, unsigned int op, > return osdep_hypercall(xcall, &call); > } > > +int xen_oscall_gsi_from_dev(xencall_handle *xcall, unsigned int sbdf) > +{ > + return osdep_oscall(xcall, sbdf); > +} > + > /* > * Local variables: > * mode: C > diff --git a/tools/libs/call/libxencall.map b/tools/libs/call/libxencall.map > index d18a3174e9dc..b92a0b5dc12c 100644 > --- a/tools/libs/call/libxencall.map > +++ b/tools/libs/call/libxencall.map > @@ -10,6 +10,8 @@ VERS_1.0 { > xencall4; > xencall5; > > + xen_oscall_gsi_from_dev; FYI, never change already released version of a library, this would add a new function to libxencall.1.0. Instead, when adding a new function to a library that is supposed to be stable (they have a *.map file in xen case), add it to a new section, that woud be VERS_1.4 in this case. But libxencall isn't approriate for this new function, so just for future reference. > xencall_alloc_buffer; > xencall_free_buffer; > xencall_alloc_buffer_pages; > diff --git a/tools/libs/call/linux.c b/tools/libs/call/linux.c > index 6d588e6bea8f..92c740e176f2 100644 > --- a/tools/libs/call/linux.c > +++ b/tools/libs/call/linux.c > @@ -85,6 +85,21 @@ long osdep_hypercall(xencall_handle *xcall, > privcmd_hypercall_t *hypercall) > return ioctl(xcall->fd, IOCTL_PRIVCMD_HYPERCALL, hypercall); > } > > +int osdep_oscall(xencall_handle *xcall, unsigned int sbdf) > +{ > + privcmd_gsi_from_dev_t dev_gsi = { > + .sbdf = sbdf, > + .gsi = -1, > + }; > + > + if (ioctl(xcall->fd, IOCTL_PRIVCMD_GSI_FROM_DEV, &dev_gsi)) { Looks like libxencall is only for hypercall, and so I don't think it's the right place to introducing another ioctl() call. > + PERROR("failed to get gsi from dev"); > + return -1; > + } > + > + return dev_gsi.gsi; > +} > + > static void *alloc_pages_bufdev(xencall_handle *xcall, size_t npages) > { > void *p; > diff --git a/tools/libs/call/private.h b/tools/libs/call/private.h > index 9c3aa432efe2..cd6eb5a3e66f 100644 > --- a/tools/libs/call/private.h > +++ b/tools/libs/call/private.h > @@ -57,6 +57,15 @@ int osdep_xencall_close(xencall_handle *xcall); > > long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall); > > +#if defined(__linux__) > +int osdep_oscall(xencall_handle *xcall, unsigned int sbdf); > +#else > +static inline int osdep_oscall(xencall_handle *xcall, unsigned int sbdf) > +{ > + return -1; > +} > +#endif > + > void *osdep_alloc_pages(xencall_handle *xcall, size_t nr_pages); > void osdep_free_pages(xencall_handle *xcall, void *p, size_t nr_pages); > > diff --git a/tools/libs/ctrl/xc_physdev.c b/tools/libs/ctrl/xc_physdev.c > index 460a8e779ce8..c1458f3a38b5 100644 > --- a/tools/libs/ctrl/xc_physdev.c > +++ b/tools/libs/ctrl/xc_physdev.c > @@ -111,3 +111,7 @@ int xc_physdev_unmap_pirq(xc_interface *xch, > return rc; > } > > +int xc_physdev_gsi_from_dev(xc_interface *xch, uint32_t sbdf) > +{ I'm not sure if this is the best place for this new function, but I can't find another one, so that will do. > + return xen_oscall_gsi_from_dev(xch->xcall, sbdf); > +} > diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile > index 37e4d1670986..6b616d5ee9b6 100644 > --- a/tools/libs/light/Makefile > +++ b/tools/libs/light/Makefile > @@ -40,7 +40,7 @@ OBJS-$(CONFIG_X86) += $(ACPI_OBJS) > > CFLAGS += -Wno-format-zero-length -Wmissing-declarations -Wformat-nonliteral > > -CFLAGS-$(CONFIG_X86) += -DCONFIG_PCI_SUPP_LEGACY_IRQ > +CFLAGS-$(CONFIG_X86) += -DCONFIG_PCI_SUPP_LEGACY_IRQ -DCONFIG_X86 > > OBJS-$(CONFIG_X86) += libxl_cpuid.o > OBJS-$(CONFIG_X86) += libxl_x86.o > diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c > index 96cb4da0794e..376f91759ac6 100644 > --- a/tools/libs/light/libxl_pci.c > +++ b/tools/libs/light/libxl_pci.c > @@ -1406,6 +1406,12 @@ static bool pci_supp_legacy_irq(void) > #endif > } > > +#define PCI_DEVID(bus, devfn)\ > + ((((uint16_t)(bus)) << 8) | ((devfn) & 0xff)) > + > +#define PCI_SBDF(seg, bus, devfn) \ > + ((((uint32_t)(seg)) << 16) | (PCI_DEVID(bus, devfn))) > + > static void pci_add_dm_done(libxl__egc *egc, > pci_add_state *pas, > int rc) > @@ -1418,6 +1424,10 @@ static void pci_add_dm_done(libxl__egc *egc, > unsigned long long start, end, flags, size; > int irq, i; > int r; > +#ifdef CONFIG_X86 > + int gsi; > + uint32_t sbdf; > +#endif > uint32_t flag = XEN_DOMCTL_DEV_RDM_RELAXED; > uint32_t domainid = domid; > bool isstubdom = libxl_is_stubdom(ctx, domid, &domainid); > @@ -1486,6 +1496,18 @@ static void pci_add_dm_done(libxl__egc *egc, > goto out_no_irq; > } > if ((fscanf(f, "%u", &irq) == 1) && irq) { > +#ifdef CONFIG_X86 Could you avoid these #ifdef, and move the new arch specific code (and maybe existing code) into libxl_x86.c ? There's already examples of arch specific code. > + sbdf = PCI_SBDF(pci->domain, pci->bus, > + (PCI_DEVFN(pci->dev, pci->func))); > + gsi = xc_physdev_gsi_from_dev(ctx->xch, sbdf); > + /* > + * Old kernel version may not support this function, > + * so if fail, keep using irq; if success, use gsi > + */ > + if (gsi > 0) { > + irq = gsi; > + } > +#endif > r = xc_physdev_map_pirq(ctx->xch, domid, irq, &irq); > if (r < 0) { > LOGED(ERROR, domainid, "xc_physdev_map_pirq irq=%d (error=%d)", > @@ -2172,6 +2194,10 @@ static void pci_remove_detached(libxl__egc *egc, > int irq = 0, i, stubdomid = 0; > const char *sysfs_path; > FILE *f; > +#ifdef CONFIG_X86 > + int gsi; > + uint32_t sbdf; > +#endif > uint32_t domainid = prs->domid; > bool isstubdom; > > @@ -2239,6 +2265,18 @@ skip_bar: > } > > if ((fscanf(f, "%u", &irq) == 1) && irq) { > +#ifdef CONFIG_X86 > + sbdf = PCI_SBDF(pci->domain, pci->bus, > + (PCI_DEVFN(pci->dev, pci->func))); > + gsi = xc_physdev_gsi_from_dev(ctx->xch, sbdf); > + /* > + * Old kernel version may not support this function, > + * so if fail, keep using irq; if success, use gsi > + */ > + if (gsi > 0) { > + irq = gsi; > + } > +#endif > rc = xc_physdev_unmap_pirq(ctx->xch, domid, irq); > if (rc < 0) { > /* Thanks, -- Anthony Perard | Vates XCP-ng Developer XCP-ng & Xen Orchestra - Vates solutions web: https://vates.tech
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