3143ae25cb
- kvm-accel-kvm-check-for-KVM_CAP_READONLY_MEM-on-VM.patch [RHEL-58928] - kvm-hw-s390x-ipl-Provide-more-memory-to-the-s390-ccw.img.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Use-the-libc-from-SLOF-and-remove-s.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Link-the-netboot-code-into-the-main.patch [RHEL-58153] - kvm-redhat-Remove-the-s390-netboot.img-from-the-spec-fil.patch [RHEL-58153] - kvm-hw-s390x-Remove-the-possibility-to-load-the-s390-net.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Merge-netboot.mak-into-the-main-Mak.patch [RHEL-58153] - kvm-docs-system-s390x-bootdevices-Update-the-documentati.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Remove-panics-from-ISO-IPL-path.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Remove-panics-from-ECKD-IPL-path.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Remove-panics-from-SCSI-IPL-path.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Remove-panics-from-DASD-IPL-path.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Remove-panics-from-Netboot-IPL-path.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Enable-failed-IPL-to-return-after-e.patch [RHEL-58153] - kvm-include-hw-s390x-Add-include-files-for-common-IPL-st.patch [RHEL-58153] - kvm-s390x-Add-individual-loadparm-assignment-to-CCW-devi.patch [RHEL-58153] - kvm-hw-s390x-Build-an-IPLB-for-each-boot-device.patch [RHEL-58153] - kvm-s390x-Rebuild-IPLB-for-SCSI-device-directly-from-DIA.patch [RHEL-58153] - kvm-pc-bios-s390x-Enable-multi-device-boot-loop.patch [RHEL-58153] - kvm-docs-system-Update-documentation-for-s390x-IPL.patch [RHEL-58153] - kvm-tests-qtest-Add-s390x-boot-order-tests-to-cdrom-test.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Clarify-alignment-is-in-bytes.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Don-t-generate-TEXTRELs.patch [RHEL-58153] - kvm-pc-bios-s390-ccw-Introduce-EXTRA_LDFLAGS.patch [RHEL-58153] - kvm-vnc-fix-crash-when-no-console-attached.patch [RHEL-50529] - kvm-vfio-migration-Report-only-stop-copy-size-in-vfio_st.patch [RHEL-64308] - kvm-vfio-migration-Change-trace-formats-from-hex-to-deci.patch [RHEL-64308] - kvm-kvm-Allow-kvm_arch_get-put_registers-to-accept-Error.patch [RHEL-20574] - kvm-target-i386-kvm-Report-which-action-failed-in-kvm_ar.patch [RHEL-20574] - kvm-target-i386-cpu-set-correct-supported-XCR0-features-.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-do-not-rely-on-ExtSaveArea-for-accelerat.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-return-bool-from-x86_cpu_filter_features.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-add-AVX10-feature-and-AVX10-version-prop.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-add-CPUID.24-features-for-AVX10.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-Add-feature-dependencies-for-AVX10.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-Add-AVX512-state-when-AVX10-is-supported.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-Introduce-GraniteRapids-v2-model.patch [RHEL-30315 RHEL-45110] - kvm-target-i386-add-sha512-sm3-sm4-feature-bits.patch [RHEL-30315 RHEL-45110] - Resolves: RHEL-58928 (Boot SNP guests failed with qemu-kvm: kvm_set_user_memory_region) - Resolves: RHEL-58153 ([IBM 10.0 FEAT] KVM: Full boot order support - qemu part) - Resolves: RHEL-50529 (Qemu-kvm crashed if no display device setting and switching display by remote-viewer) - Resolves: RHEL-64308 (High threshold value observed in vGPU live migration) - Resolves: RHEL-20574 (Fail migration properly when put cpu register fails) - Resolves: RHEL-30315 ([Intel 10.0 FEAT] [GNR] Virt-QEMU: Add AVX10.1 instruction support) - Resolves: RHEL-45110 ([Intel 10.0 FEAT] [CWF][DMR] Virt-QEMU: Advertise new instructions SHA2-512NI, SM3, and SM4)
77 lines
3.4 KiB
Diff
77 lines
3.4 KiB
Diff
From f1359f43bbc61f31c292ca1770688b6db6b959af Mon Sep 17 00:00:00 2001
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From: Jared Rossi <jrossi@linux.ibm.com>
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Date: Sat, 19 Oct 2024 21:29:52 -0400
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Subject: [PATCH 20/38] docs/system: Update documentation for s390x IPL
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Thomas Huth <thuth@redhat.com>
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RH-MergeRequest: 278: Full boot order support for s390x [Centos 10]
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RH-Jira: RHEL-58153
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RH-Acked-by: Cédric Le Goater <clg@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [19/23] 8dfc0357ec42e9baac741670f6e7da3127de0e50 (thuth/qemu-kvm-cs9)
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Update docs to show that s390x PC BIOS can support more than one boot device.
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Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Message-ID: <20241020012953.1380075-19-jrossi@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 0bd107138ff0b171e3cd314dbc200950bcab2b05)
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---
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docs/system/bootindex.rst | 7 ++++---
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docs/system/s390x/bootdevices.rst | 9 ++++++---
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2 files changed, 10 insertions(+), 6 deletions(-)
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diff --git a/docs/system/bootindex.rst b/docs/system/bootindex.rst
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index 8b057f812f..988f7b3beb 100644
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--- a/docs/system/bootindex.rst
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+++ b/docs/system/bootindex.rst
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@@ -49,10 +49,11 @@ Limitations
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-----------
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Some firmware has limitations on which devices can be considered for
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-booting. For instance, the PC BIOS boot specification allows only one
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-disk to be bootable. If boot from disk fails for some reason, the BIOS
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+booting. For instance, the x86 PC BIOS boot specification allows only one
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+disk to be bootable. If boot from disk fails for some reason, the x86 BIOS
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won't retry booting from other disk. It can still try to boot from
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-floppy or net, though.
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+floppy or net, though. In the case of s390x BIOS, the BIOS will try up to
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+8 total devices, any number of which may be disks.
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Sometimes, firmware cannot map the device path QEMU wants firmware to
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boot from to a boot method. It doesn't happen for devices the firmware
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diff --git a/docs/system/s390x/bootdevices.rst b/docs/system/s390x/bootdevices.rst
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index c97efb8fc0..1a1a764c1c 100644
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--- a/docs/system/s390x/bootdevices.rst
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+++ b/docs/system/s390x/bootdevices.rst
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@@ -6,9 +6,7 @@ Booting with bootindex parameter
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For classical mainframe guests (i.e. LPAR or z/VM installations), you always
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have to explicitly specify the disk where you want to boot from (or "IPL" from,
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-in s390x-speak -- IPL means "Initial Program Load"). In particular, there can
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-also be only one boot device according to the architecture specification, thus
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-specifying multiple boot devices is not possible (yet).
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+in s390x-speak -- IPL means "Initial Program Load").
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So for booting an s390x guest in QEMU, you should always mark the
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device where you want to boot from with the ``bootindex`` property, for
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@@ -17,6 +15,11 @@ example::
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qemu-system-s390x -drive if=none,id=dr1,file=guest.qcow2 \
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-device virtio-blk,drive=dr1,bootindex=1
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+Multiple devices may have a bootindex. The lowest bootindex is assigned to the
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+device to IPL first. If the IPL fails for the first, the device with the second
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+lowest bootindex will be tried and so on until IPL is successful or there are no
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+remaining boot devices to try.
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+
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For booting from a CD-ROM ISO image (which needs to include El-Torito boot
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information in order to be bootable), it is recommended to specify a ``scsi-cd``
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device, for example like this::
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--
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2.39.3
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