[PATCH v4 05/12] x86: Replace arch-specific boot_domain with the common one

[Alejandro Vallejo <agarciav@xxxxxxx>]

Add the single arch-specific field in an "arch" subfield defined in
asm/bootfdt.h.

No functional change intended.

Signed-off-by: Alejandro Vallejo <agarciav@xxxxxxx>
Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/x86/hvm/dom0_build.c          |  2 +-
 xen/arch/x86/include/asm/boot-domain.h | 33 --------------------------
 xen/arch/x86/include/asm/bootfdt.h     |  6 +++++
 xen/arch/x86/include/asm/bootinfo.h    |  1 -
 xen/arch/x86/pv/dom0_build.c           |  2 +-
 xen/arch/x86/setup.c                   | 12 ++++++----
 xen/include/xen/bootfdt.h              |  4 ++++
 7 files changed, 19 insertions(+), 41 deletions(-)
 delete mode 100644 xen/arch/x86/include/asm/boot-domain.h

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 2bb8ef355c..8d2734f2b5 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -648,7 +648,7 @@ static int __init pvh_load_kernel(
 {
     struct domain *d = bd->d;
     struct boot_module *image = bd->kernel;
-    struct boot_module *initrd = bd->module;
+    struct boot_module *initrd = bd->initrd;
     void *image_base = bootstrap_map_bm(image);
     void *image_start = image_base + image->arch.headroom;
     unsigned long image_len = image->size;
diff --git a/xen/arch/x86/include/asm/boot-domain.h 
b/xen/arch/x86/include/asm/boot-domain.h
deleted file mode 100644
index d7c6042e25..0000000000
--- a/xen/arch/x86/include/asm/boot-domain.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (c) 2024 Apertus Solutions, LLC
- * Author: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
- * Copyright (c) 2024 Christopher Clark <christopher.w.clark@xxxxxxxxx>
- */
-
-#ifndef __XEN_X86_BOOTDOMAIN_H__
-#define __XEN_X86_BOOTDOMAIN_H__
-
-#include <public/xen.h>
-
-struct boot_domain {
-    domid_t domid;
-
-    struct boot_module *kernel;
-    struct boot_module *module;
-    const char *cmdline;
-
-    struct domain *d;
-};
-
-#endif
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/xen/arch/x86/include/asm/bootfdt.h 
b/xen/arch/x86/include/asm/bootfdt.h
index a4c4bf30b9..c21dbe961b 100644
--- a/xen/arch/x86/include/asm/bootfdt.h
+++ b/xen/arch/x86/include/asm/bootfdt.h
@@ -3,6 +3,12 @@
 #define X86_BOOTFDT_H
 
 #include <xen/types.h>
+#include <public/xen.h>
+
+struct arch_boot_domain
+{
+    domid_t domid;
+};
 
 struct arch_boot_module
 {
diff --git a/xen/arch/x86/include/asm/bootinfo.h 
b/xen/arch/x86/include/asm/bootinfo.h
index d33b100e04..4f2cc5906e 100644
--- a/xen/arch/x86/include/asm/bootinfo.h
+++ b/xen/arch/x86/include/asm/bootinfo.h
@@ -12,7 +12,6 @@
 #include <xen/init.h>
 #include <xen/multiboot.h>
 #include <xen/types.h>
-#include <asm/boot-domain.h>
 
 /* Max number of boot modules a bootloader can provide in addition to Xen */
 #define MAX_NR_BOOTMODS 63
diff --git a/xen/arch/x86/pv/dom0_build.c b/xen/arch/x86/pv/dom0_build.c
index a4b5362357..c37bea9454 100644
--- a/xen/arch/x86/pv/dom0_build.c
+++ b/xen/arch/x86/pv/dom0_build.c
@@ -375,7 +375,7 @@ static int __init dom0_construct(const struct boot_domain 
*bd)
     struct vcpu *v = d->vcpu[0];
 
     struct boot_module *image = bd->kernel;
-    struct boot_module *initrd = bd->module;
+    struct boot_module *initrd = bd->initrd;
     void *image_base;
     unsigned long image_len;
     void *image_start;
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 4f34bbe688..a9560ac619 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -297,7 +297,9 @@ static const char *cmdline_cook(const char *p, const char 
*loader_name);
 struct boot_info __initdata xen_boot_info = {
     .loader = "unknown",
     .cmdline = "",
-    .domains = { [0 ... MAX_NR_BOOTDOMS - 1] = { .domid = DOMID_INVALID } },
+    .domains = { [0 ... MAX_NR_BOOTDOMS - 1] = {
+        .arch.domid = DOMID_INVALID
+    }},
     /*
      * There's a MAX_NR_BOOTMODS-th entry in the array. It's not off by one.
      *
@@ -1045,11 +1047,11 @@ static struct domain *__init create_dom0(struct 
boot_info *bi)
         dom0_cfg.flags |= XEN_DOMCTL_CDF_iommu;
 
     /* Create initial domain.  Not d0 for pvshim. */
-    bd->domid = get_initial_domain_id();
-    d = domain_create(bd->domid, &dom0_cfg,
+    bd->arch.domid = get_initial_domain_id();
+    d = domain_create(bd->arch.domid, &dom0_cfg,
                       pv_shim ? 0 : CDF_privileged | CDF_hardware);
     if ( IS_ERR(d) )
-        panic("Error creating d%u: %ld\n", bd->domid, PTR_ERR(d));
+        panic("Error creating d%u: %ld\n", bd->arch.domid, PTR_ERR(d));
 
     init_dom0_cpuid_policy(d);
 
@@ -2168,7 +2170,7 @@ void asmlinkage __init noreturn __start_xen(void)
     if ( initrdidx < MAX_NR_BOOTMODS )
     {
         bi->mods[initrdidx].kind = BOOTMOD_RAMDISK;
-        bi->domains[0].module = &bi->mods[initrdidx];
+        bi->domains[0].initrd = &bi->mods[initrdidx];
         if ( first_boot_module_index(bi, BOOTMOD_UNKNOWN) < MAX_NR_BOOTMODS )
             printk(XENLOG_WARNING
                    "Multiple initrd candidates, picking module #%u\n",
diff --git a/xen/include/xen/bootfdt.h b/xen/include/xen/bootfdt.h
index be0abe30ef..8ea52290b7 100644
--- a/xen/include/xen/bootfdt.h
+++ b/xen/include/xen/bootfdt.h
@@ -108,6 +108,10 @@ struct boot_domain {
     struct boot_module *initrd;
 
     const char* cmdline;
+
+#if __has_include(<asm/bootfdt.h>)
+    struct arch_boot_domain arch;
+#endif
 };
 
 /*
-- 
2.43.0