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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v5 10/11] arm/libxl: Emulated PCI device tree node in libxl
libxl will create an emulated PCI device tree node in the device tree to
enable the guest OS to discover the virtual PCI during guest boot.
Emulated PCI device tree node will only be created when there is any
device assigned to guest.
A new area has been reserved in the arm guest physical map at
which the VPCI bus is declared in the device tree (reg and ranges
parameters of the node).
Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
---
Change in v5:
- Move setting the arch_arm.vpci and XEN_DOMCTL_CDF_vpci to libxl_arm.c
Change in v4:
- Gate code for x86 for setting the XEN_DOMCTL_CDF_vpci for x86.
Change in v3:
- Make GUEST_VPCI_MEM_ADDR address 2MB aligned
Change in v2:
- enable doamin_vpci_init() when XEN_DOMCTL_CDF_vpci is set for domain.
---
---
tools/include/libxl.h | 6 ++
tools/libs/light/libxl_arm.c | 111 +++++++++++++++++++++++++++++++
tools/libs/light/libxl_types.idl | 1 +
xen/include/public/arch-arm.h | 10 +++
4 files changed, 128 insertions(+)
diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index b9ba16d698..3362073b21 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -358,6 +358,12 @@
*/
#define LIBXL_HAVE_BUILDINFO_ARM_VUART 1
+/*
+ * LIBXL_HAVE_BUILDINFO_ARM_VPCI indicates that the toolstack supports virtual
+ * PCI for ARM.
+ */
+#define LIBXL_HAVE_BUILDINFO_ARM_VPCI 1
+
/*
* LIBXL_HAVE_BUILDINFO_GRANT_LIMITS indicates that libxl_domain_build_info
* has the max_grant_frames and max_maptrack_frames fields.
diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c
index e3140a6e00..2be208b99b 100644
--- a/tools/libs/light/libxl_arm.c
+++ b/tools/libs/light/libxl_arm.c
@@ -101,6 +101,12 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc,
return ERROR_FAIL;
}
+ /* Enable VPCI support. */
+ if (d_config->num_pcidevs) {
+ config->flags |= XEN_DOMCTL_CDF_vpci;
+ libxl_defbool_set(&d_config->b_info.arch_arm.vpci, true);
+ }
+
return 0;
}
@@ -269,6 +275,58 @@ static int fdt_property_regs(libxl__gc *gc, void *fdt,
return fdt_property(fdt, "reg", regs, sizeof(regs));
}
+static int fdt_property_values(libxl__gc *gc, void *fdt,
+ const char *name, unsigned num_cells, ...)
+{
+ uint32_t prop[num_cells];
+ be32 *cells = &prop[0];
+ int i;
+ va_list ap;
+ uint32_t arg;
+
+ va_start(ap, num_cells);
+ for (i = 0 ; i < num_cells; i++) {
+ arg = va_arg(ap, uint32_t);
+ set_cell(&cells, 1, arg);
+ }
+ va_end(ap);
+
+ return fdt_property(fdt, name, prop, sizeof(prop));
+}
+
+static int fdt_property_vpci_ranges(libxl__gc *gc, void *fdt,
+ unsigned addr_cells,
+ unsigned size_cells,
+ unsigned num_regs, ...)
+{
+ uint32_t regs[num_regs*((addr_cells*2)+size_cells+1)];
+ be32 *cells = ®s[0];
+ int i;
+ va_list ap;
+ uint64_t arg;
+
+ va_start(ap, num_regs);
+ for (i = 0 ; i < num_regs; i++) {
+ /* Set the memory bit field */
+ arg = va_arg(ap, uint32_t);
+ set_cell(&cells, 1, arg);
+
+ /* Set the vpci bus address */
+ arg = addr_cells ? va_arg(ap, uint64_t) : 0;
+ set_cell(&cells, addr_cells , arg);
+
+ /* Set the cpu bus address where vpci address is mapped */
+ set_cell(&cells, addr_cells, arg);
+
+ /* Set the vpci size requested */
+ arg = size_cells ? va_arg(ap, uint64_t) : 0;
+ set_cell(&cells, size_cells, arg);
+ }
+ va_end(ap);
+
+ return fdt_property(fdt, "ranges", regs, sizeof(regs));
+}
+
static int make_root_properties(libxl__gc *gc,
const libxl_version_info *vers,
void *fdt)
@@ -668,6 +726,53 @@ static int make_vpl011_uart_node(libxl__gc *gc, void *fdt,
return 0;
}
+static int make_vpci_node(libxl__gc *gc, void *fdt,
+ const struct arch_info *ainfo,
+ struct xc_dom_image *dom)
+{
+ int res;
+ const uint64_t vpci_ecam_base = GUEST_VPCI_ECAM_BASE;
+ const uint64_t vpci_ecam_size = GUEST_VPCI_ECAM_SIZE;
+ const char *name = GCSPRINTF("pcie@%"PRIx64, vpci_ecam_base);
+
+ res = fdt_begin_node(fdt, name);
+ if (res) return res;
+
+ res = fdt_property_compat(gc, fdt, 1, "pci-host-ecam-generic");
+ if (res) return res;
+
+ res = fdt_property_string(fdt, "device_type", "pci");
+ if (res) return res;
+
+ res = fdt_property_regs(gc, fdt, GUEST_ROOT_ADDRESS_CELLS,
+ GUEST_ROOT_SIZE_CELLS, 1, vpci_ecam_base, vpci_ecam_size);
+ if (res) return res;
+
+ res = fdt_property_values(gc, fdt, "bus-range", 2, 0, 255);
+ if (res) return res;
+
+ res = fdt_property_cell(fdt, "#address-cells", 3);
+ if (res) return res;
+
+ res = fdt_property_cell(fdt, "#size-cells", 2);
+ if (res) return res;
+
+ res = fdt_property_string(fdt, "status", "okay");
+ if (res) return res;
+
+ res = fdt_property_vpci_ranges(gc, fdt, GUEST_ROOT_ADDRESS_CELLS,
+ GUEST_ROOT_SIZE_CELLS, 2,
+ GUEST_VPCI_ADDR_TYPE_MEM, GUEST_VPCI_MEM_ADDR, GUEST_VPCI_MEM_SIZE,
+ GUEST_VPCI_ADDR_TYPE_PREFETCH_MEM, GUEST_VPCI_PREFETCH_MEM_ADDR,
+ GUEST_VPCI_PREFETCH_MEM_SIZE);
+ if (res) return res;
+
+ res = fdt_end_node(fdt);
+ if (res) return res;
+
+ return 0;
+}
+
static const struct arch_info *get_arch_info(libxl__gc *gc,
const struct xc_dom_image *dom)
{
@@ -971,6 +1076,9 @@ next_resize:
if (info->tee == LIBXL_TEE_TYPE_OPTEE)
FDT( make_optee_node(gc, fdt) );
+ if (libxl_defbool_val(info->arch_arm.vpci))
+ FDT( make_vpci_node(gc, fdt, ainfo, dom) );
+
if (pfdt)
FDT( copy_partial_fdt(gc, fdt, pfdt) );
@@ -1189,6 +1297,9 @@ void libxl__arch_domain_build_info_setdefault(libxl__gc
*gc,
/* ACPI is disabled by default */
libxl_defbool_setdefault(&b_info->acpi, false);
+ /* VPCI is disabled by default */
+ libxl_defbool_setdefault(&b_info->arch_arm.vpci, false);
+
if (b_info->type != LIBXL_DOMAIN_TYPE_PV)
return;
diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl
index 3f9fff653a..78b1ddf0b8 100644
--- a/tools/libs/light/libxl_types.idl
+++ b/tools/libs/light/libxl_types.idl
@@ -644,6 +644,7 @@ libxl_domain_build_info = Struct("domain_build_info",[
("arch_arm", Struct(None, [("gic_version", libxl_gic_version),
("vuart", libxl_vuart_type),
+ ("vpci", libxl_defbool),
])),
("arch_x86", Struct(None, [("msr_relaxed", libxl_defbool),
])),
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 44be337dec..45aac5d18f 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -433,6 +433,11 @@ typedef uint64_t xen_callback_t;
#define GUEST_PL011_BASE xen_mk_ullong(0x22000000)
#define GUEST_PL011_SIZE xen_mk_ullong(0x00001000)
+/* Guest PCI-PCIe memory space where config space and BAR will be available.*/
+#define GUEST_VPCI_ADDR_TYPE_MEM xen_mk_ullong(0x02000000)
+#define GUEST_VPCI_MEM_ADDR xen_mk_ullong(0x23000000)
+#define GUEST_VPCI_MEM_SIZE xen_mk_ullong(0x10000000)
+
/*
* 16MB == 4096 pages reserved for guest to use as a region to map its
* grant table in.
@@ -448,6 +453,11 @@ typedef uint64_t xen_callback_t;
#define GUEST_RAM0_BASE xen_mk_ullong(0x40000000) /* 3GB of low RAM @ 1GB */
#define GUEST_RAM0_SIZE xen_mk_ullong(0xc0000000)
+/* 4GB @ 4GB Prefetch Memory for VPCI */
+#define GUEST_VPCI_ADDR_TYPE_PREFETCH_MEM xen_mk_ullong(0x42000000)
+#define GUEST_VPCI_PREFETCH_MEM_ADDR xen_mk_ullong(0x100000000)
+#define GUEST_VPCI_PREFETCH_MEM_SIZE xen_mk_ullong(0x100000000)
+
#define GUEST_RAM1_BASE xen_mk_ullong(0x0200000000) /* 1016GB of RAM @ 8GB */
#define GUEST_RAM1_SIZE xen_mk_ullong(0xfe00000000)
--
2.25.1
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