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From 4a1515fe8a1343c66ca3a889897568f13eedd7f3 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Wed, 8 May 2019 13:37:49 +0100
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Subject: [PATCH] s390-bios: Skip bootmap signature entries
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20190508133749.11555-2-thuth@redhat.com>
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Patchwork-id: 87209
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 1/1] s390-bios: Skip bootmap signature entries
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Bugzilla: 1683275
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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From: "Jason J. Herne" <jjherne@linux.ibm.com>
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Newer versions of zipl have the ability to write signature entries to the boot
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script for secure boot. We don't yet support secure boot, but we need to skip
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over signature entries while reading the boot script in order to maintain our
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ability to boot guest operating systems that have a secure bootloader.
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Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
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Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
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Message-Id: <1556543381-12671-1-git-send-email-jjherne@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 2497b4a3c08426122d1a89b808c669a734469e5a)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/bootmap.c | 19 +++++++++++++++++--
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pc-bios/s390-ccw/bootmap.h | 10 ++++++----
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2 files changed, 23 insertions(+), 6 deletions(-)
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diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
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index e41e715..ffbf671 100644
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--- a/pc-bios/s390-ccw/bootmap.c
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+++ b/pc-bios/s390-ccw/bootmap.c
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@@ -309,7 +309,14 @@ static void run_eckd_boot_script(block_number_t bmt_block_nr,
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memset(sec, FREE_SPACE_FILLER, sizeof(sec));
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read_block(block_nr, sec, "Cannot read Boot Map Script");
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- for (i = 0; bms->entry[i].type == BOOT_SCRIPT_LOAD; i++) {
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+ for (i = 0; bms->entry[i].type == BOOT_SCRIPT_LOAD ||
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+ bms->entry[i].type == BOOT_SCRIPT_SIGNATURE; i++) {
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+
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+ /* We don't support secure boot yet, so we skip signature entries */
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+ if (bms->entry[i].type == BOOT_SCRIPT_SIGNATURE) {
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+ continue;
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+ }
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+
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address = bms->entry[i].address.load_address;
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block_nr = eckd_block_num(&bms->entry[i].blkptr.xeckd.bptr.chs);
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@@ -544,7 +551,15 @@ static void zipl_run(ScsiBlockPtr *pte)
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/* Load image(s) into RAM */
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entry = (ComponentEntry *)(&header[1]);
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- while (entry->component_type == ZIPL_COMP_ENTRY_LOAD) {
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+ while (entry->component_type == ZIPL_COMP_ENTRY_LOAD ||
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+ entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) {
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+
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+ /* We don't support secure boot yet, so we skip signature entries */
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+ if (entry->component_type == ZIPL_COMP_ENTRY_SIGNATURE) {
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+ entry++;
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+ continue;
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+ }
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+
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zipl_load_segment(entry);
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entry++;
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diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
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index 732c111..f1ce423 100644
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--- a/pc-bios/s390-ccw/bootmap.h
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+++ b/pc-bios/s390-ccw/bootmap.h
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@@ -98,8 +98,9 @@ typedef struct ScsiMbr {
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#define ZIPL_COMP_HEADER_IPL 0x00
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#define ZIPL_COMP_HEADER_DUMP 0x01
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-#define ZIPL_COMP_ENTRY_LOAD 0x02
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-#define ZIPL_COMP_ENTRY_EXEC 0x01
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+#define ZIPL_COMP_ENTRY_EXEC 0x01
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+#define ZIPL_COMP_ENTRY_LOAD 0x02
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+#define ZIPL_COMP_ENTRY_SIGNATURE 0x03
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typedef struct XEckdMbr {
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uint8_t magic[4]; /* == "xIPL" */
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@@ -117,8 +118,9 @@ typedef struct BootMapScriptEntry {
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BootMapPointer blkptr;
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uint8_t pad[7];
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uint8_t type; /* == BOOT_SCRIPT_* */
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-#define BOOT_SCRIPT_EXEC 0x01
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-#define BOOT_SCRIPT_LOAD 0x02
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+#define BOOT_SCRIPT_EXEC 0x01
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+#define BOOT_SCRIPT_LOAD 0x02
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+#define BOOT_SCRIPT_SIGNATURE 0x03
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union {
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uint64_t load_address;
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uint64_t load_psw;
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--
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1.8.3.1
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