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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 21/44] x86/boot: convert ramdisk locating to struct boot_module Date: Fri, 30 Aug 2024 17:47:06 -0400 Message-Id: <20240830214730.1621-22-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: 1725054641031116600 Content-Type: text/plain; charset="utf-8" Locate the first unclaimed struct boot_module and mark it as ramdisk. If th= ere are any remaining unclaimed struct boot_module instances, report to the console. Signed-off-by: Daniel P. Smith --- xen/arch/x86/setup.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index 28b39d23f644..189c45302fab 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -2100,20 +2100,30 @@ void asmlinkage __init noreturn __start_xen(unsigne= d long mbi_p) cpu_has_nx ? XENLOG_INFO : XENLOG_WARNING "Warning: ", cpu_has_nx ? "" : "not "); =20 - initrdidx =3D find_first_bit(module_map, boot_info->nr_mods); - boot_info->mods[initrdidx].type =3D BOOTMOD_RAMDISK; - boot_info->mods[initrdidx].flags |=3D BOOTMOD_FLAG_X86_CONSUMED; - if ( bitmap_weight(module_map, boot_info->nr_mods) > 1 ) - printk(XENLOG_WARNING - "Multiple initrd candidates, picking module #%u\n", - initrdidx); + /* + * At this point all capabilities that consume boot modules should have + * claimed their boot modules. Find the first unclaimed boot module and + * claim it as the initrd ramdisk. Do a second search to see if there = are + * any remaining unclaimed boot modules, and report them as unusued in= itrd + * candidates. + */ + initrdidx =3D first_boot_module_index(boot_info, BOOTMOD_UNKNOWN); + if ( initrdidx >=3D 0 ) + { + boot_info->mods[initrdidx].type =3D BOOTMOD_RAMDISK; + boot_info->mods[initrdidx].flags |=3D BOOTMOD_FLAG_X86_CONSUMED; + if ( first_boot_module_index(boot_info, BOOTMOD_UNKNOWN) >=3D 0 ) + printk(XENLOG_WARNING + "Multiple initrd candidates, picking module #%u\n", + initrdidx); + } =20 /* * We're going to setup domain0 using the module(s) that we stashed sa= fely * above our heap. The second module, if present, is an initrd ramdisk. */ dom0 =3D create_dom0(boot_info->mods[0].early_mod, boot_info->mods[0].= headroom, - initrdidx < boot_info->nr_mods ? + (initrdidx >=3D 0 && initrdidx < boot_info->nr_mods= ) ? boot_info->mods[initrdidx].early_mod : NULL, kextra, boot_info->boot_loader_name); if ( !dom0 ) --=20 2.30.2