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Smith" To: xen-devel@lists.xenproject.org Cc: "Daniel P. Smith" , jason.andryuk@amd.com, christopher.w.clark@gmail.com, Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH v4 38/44] x86/boot: introduce boot domain Date: Fri, 30 Aug 2024 17:47:23 -0400 Message-Id: <20240830214730.1621-39-dpsmith@apertussolutions.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20240830214730.1621-1-dpsmith@apertussolutions.com> References: <20240830214730.1621-1-dpsmith@apertussolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External X-ZohoMail-DKIM: pass (identity dpsmith@apertussolutions.com) X-ZM-MESSAGEID: 1725054987064116600 Content-Type: text/plain; charset="utf-8" To begin moving toward allowing the hypervisor to construct more than one domain at boot, a container is needed for a domain's build information. Introduce a new header, , that contains the initial struct boot_domain that encapsulate the build information for a domain. No functional change intended. Signed-off-by: Daniel P. Smith --- xen/arch/x86/include/asm/bootdomain.h | 28 +++++++++++++++++++++++++++ xen/arch/x86/include/asm/bootinfo.h | 7 +++++++ xen/arch/x86/setup.c | 27 +++++++++++--------------- 3 files changed, 46 insertions(+), 16 deletions(-) create mode 100644 xen/arch/x86/include/asm/bootdomain.h diff --git a/xen/arch/x86/include/asm/bootdomain.h b/xen/arch/x86/include/a= sm/bootdomain.h new file mode 100644 index 000000000000..4285223ac5ab --- /dev/null +++ b/xen/arch/x86/include/asm/bootdomain.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2024 Apertus Solutions, LLC + * Author: Daniel P. Smith + * Copyright (c) 2024 Christopher Clark + */ + +#ifndef __XEN_X86_BOOTDOMAIN_H__ +#define __XEN_X86_BOOTDOMAIN_H__ + +struct boot_module; + +struct boot_domain { + struct boot_module *kernel; + struct boot_module *ramdisk; +}; + +#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/bootinfo.h b/xen/arch/x86/include/asm= /bootinfo.h index 59755ef42e53..b135aaebd25e 100644 --- a/xen/arch/x86/include/asm/bootinfo.h +++ b/xen/arch/x86/include/asm/bootinfo.h @@ -10,6 +10,11 @@ =20 #include =20 +#include + +/* Max number of boot domains that Xen can construct */ +#define MAX_NR_BOOTDOMS 1 + /* Boot module binary type / purpose */ enum bootmod_type { BOOTMOD_UNKNOWN, @@ -45,6 +50,8 @@ struct boot_info { =20 paddr_t mmap_addr; uint32_t mmap_length; + + struct boot_domain *domains; }; =20 static inline int __init next_boot_module_index( diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index a6fbaecee9ed..77abed637ff2 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -287,6 +287,7 @@ static void __init multiboot_to_bootinfo(multiboot_info= _t *mbi, module_t *mods) { static struct boot_info __initdata info; static struct boot_module __initdata boot_mods[MAX_NR_BOOTMODS + 1]; + static struct boot_domain __initdata boot_doms[MAX_NR_BOOTDOMS]; unsigned int i; =20 info.nr_mods =3D mbi->mods_count; @@ -321,6 +322,8 @@ static void __init multiboot_to_bootinfo(multiboot_info= _t *mbi, module_t *mods) boot_mods[info.nr_mods].type =3D BOOTMOD_XEN; boot_mods[info.nr_mods].flags |=3D BOOTMOD_FLAG_X86_CONSUMED; =20 + info.domains =3D boot_doms; + boot_info =3D &info; } =20 @@ -958,20 +961,10 @@ static struct domain *__init create_dom0(const struct= boot_info *bi) .misc_flags =3D opt_dom0_msr_relaxed ? XEN_X86_MSR_RELAXED : 0, }, }; - int mod_idx =3D first_boot_module_index(bi, BOOTMOD_RAMDISK); - struct boot_module *image, *initrd; + struct boot_domain *bd =3D &bi->domains[0]; struct domain *d; domid_t domid; =20 - /* Map boot_module to mb1 module for dom0 */ - image =3D &bi->mods[0]; - - /* Map boot_module to mb1 module for initrd */ - if ( mod_idx < 0 ) - initrd =3D NULL; - else - initrd =3D &bi->mods[mod_idx]; - if ( opt_dom0_pvh ) { dom0_cfg.flags |=3D (XEN_DOMCTL_CDF_hvm | @@ -997,11 +990,11 @@ static struct domain *__init create_dom0(const struct= boot_info *bi) panic("Error creating d%uv0\n", domid); =20 /* Grab the DOM0 command line. */ - if ( image->cmdline || bi->kextra ) + if ( bd->kernel->cmdline || bi->kextra ) { - if ( image->cmdline ) - safe_strcpy(cmdline, - cmdline_cook(__va((unsigned long)image->cmdline), + if ( bd->kernel->cmdline ) + safe_strcpy(cmdline, cmdline_cook( + __va((unsigned long)bd->kernel->cmdline), bi->boot_loader_name)); =20 if ( bi->kextra ) @@ -1036,7 +1029,7 @@ static struct domain *__init create_dom0(const struct= boot_info *bi) write_cr4(read_cr4() & ~X86_CR4_SMAP); } =20 - if ( construct_dom0(d, image, initrd, cmdline) !=3D 0 ) + if ( construct_dom0(d, bd->kernel, bd->ramdisk, cmdline) !=3D 0 ) panic("Could not construct domain 0\n"); =20 if ( cpu_has_smap ) @@ -1221,6 +1214,7 @@ void asmlinkage __init noreturn __start_xen(unsigned = long mbi_p) /* Dom0 kernel is always first */ boot_info->mods[0].type =3D BOOTMOD_KERNEL; boot_info->mods[0].flags |=3D BOOTMOD_FLAG_X86_CONSUMED; + boot_info->domains[0].kernel =3D &boot_info->mods[0]; =20 if ( pvh_boot ) { @@ -2112,6 +2106,7 @@ void asmlinkage __init noreturn __start_xen(unsigned = long mbi_p) { boot_info->mods[initrdidx].type =3D BOOTMOD_RAMDISK; boot_info->mods[initrdidx].flags |=3D BOOTMOD_FLAG_X86_CONSUMED; + boot_info->domains[0].ramdisk =3D &boot_info->mods[initrdidx]; if ( first_boot_module_index(boot_info, BOOTMOD_UNKNOWN) >=3D 0 ) printk(XENLOG_WARNING "Multiple initrd candidates, picking module #%u\n", --=20 2.30.2