References: bsc#1200691, an IBM request
This patch reverts commit 363fca413cae336a0ca86cbdcbb2f65fead948ee.
Only x86 will have a hard requirement for the --osinfo option.

From: Cole Robinson crobinso@redhat.com Sun Feb 20 11:40:35 2022 -0500
Subject: virt-install: Require --osinfo for non-x86 HVM case too
Date: Sun Feb 20 11:40:35 2022 -0500:
Git: 363fca413cae336a0ca86cbdcbb2f65fead948ee

It's generally not as valuable for non-x86 where we don't have the
history of supporting non-virtio OSes, but as time goes on it will
likely become more relevant for non-x86 arches, so let's make this
change now to get ahead of it.

Signed-off-by: Cole Robinson <crobinso@redhat.com>

--- a/man/virt-install.rst
+++ b/man/virt-install.rst
@@ -1055,8 +1055,8 @@ all other settings off or unset.
 
 By default, virt-install will always attempt ``--osinfo detect=on``
 for appropriate install media. If no OS is detected, we will fail
-in most common cases. This fatal error was added in 2022. You can
-work around this by using the fallback example
+in certain common cases (x86 KVM for example). This fatal error was
+added in 2022. You can work around this by using the fallback example
 above, or disabling the ``require`` option. If you just need to get back
 to the old non-fatal behavior ASAP, set the environment variable
 VIRTINSTALL_OSINFO_DISABLE_REQUIRE=1.
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1181,7 +1181,6 @@ c.add_compare("--connect %(URI-KVM-ARMV7
 #################
 
 c.add_valid("--arch aarch64 --osinfo fedora19 --nodisks --pxe --connect " + utils.URIs.kvm_x86_nodomcaps, grep="Libvirt version does not support UEFI")  # attempt to default to aarch64 UEFI, but it fails, but should only print warnings
-c.add_invalid("--arch aarch64 --nodisks --pxe --connect " + utils.URIs.kvm_x86, grep="OS name is required")  # catch missing osinfo for non-x86
 c.add_compare("--arch aarch64 --osinfo fedora19 --machine virt --boot kernel=/f19-arm.kernel,initrd=/f19-arm.initrd,kernel_args=\"console=ttyAMA0,1234 rw root=/dev/vda3\" --disk %(EXISTIMG1)s", "aarch64-machvirt")
 c.add_compare("--arch aarch64 --osinfo fedora19 --boot kernel=/f19-arm.kernel,initrd=/f19-arm.initrd,kernel_args=\"console=ttyAMA0,1234 rw root=/dev/vda3\" --disk %(EXISTIMG1)s", "aarch64-machdefault")
 c.add_compare("--arch aarch64 --cdrom %(ISO-F26-NETINST)s --boot loader=CODE.fd,nvram.template=VARS.fd --disk %(EXISTIMG1)s --cpu none --events on_crash=preserve,on_reboot=destroy,on_poweroff=restart", "aarch64-cdrom")  # cdrom test, but also --cpu none override, --events override, and headless
--- a/virtinst/virtinstall.py
+++ b/virtinst/virtinstall.py
@@ -355,13 +355,9 @@ def _show_memory_warnings(guest):
 
 
 def _needs_accurate_osinfo(guest):
-    # HVM is really the only case where OS impacts what we set for defaults,
-    # so far.
-    #
-    # Historically we would only warn about missing osinfo on x86, but
-    # with the change to make osinfo mandatory we relaxed the arch check,
-    # so virt-install behavior is more consistent.
-    return guest.os.is_hvm()
+    # Limit it to hvm x86 guests which presently our defaults
+    # only really matter for
+    return guest.os.is_x86() and guest.os.is_hvm()
 
 
 def show_guest_warnings(options, guest):