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Accepting request 786944 from home:lyan:branches:Virtualization

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fix issue that s390x could not read ipl program when using dasd as boot device

OBS-URL: https://build.opensuse.org/request/show/786944
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=537
This commit is contained in:
Bruce Rogers 2020-03-20 16:48:18 +00:00 committed by Git OBS Bridge
parent 38b478cbe9
commit f299911340
4 changed files with 142 additions and 2 deletions
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4
bundles.tar.xz
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@ -1,3 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:596a134fe14bb9bca1c177f682098f030ae5741767b562413a0212570aa863e1
size 95812
oid sha256:5d6076daf7ce76bafd1fc236b472bb3fbb516e8a2e68440f670a031c2d254250
size 105540

131
pc-bios-s390x-Save-iplb-location-in-lowc.patch Normal file
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@ -0,0 +1,131 @@
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 4 Mar 2020 06:42:31 -0500
Subject: pc-bios: s390x: Save iplb location in lowcore
References: bsc#1163140
The POP states that for a list directed IPL the IPLB is stored into
memory by the machine loader and its address is stored at offset 0x14
of the lowcore.
ZIPL currently uses the address in offset 0x14 to access the IPLB and
acquire flags about secure boot. If the IPLB address points into
memory which has an unsupported mix of flags set, ZIPL will panic
instead of booting the OS.
As the lowcore can have quite a high entropy for a guest that did drop
out of protected mode (i.e. rebooted) we encountered the ZIPL panic
quite often.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <20200304114231.23493-19-frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Liang Yan <lyan@suse.com>
---
pc-bios/s390-ccw/jump2ipl.c | 1 +
pc-bios/s390-ccw/main.c | 8 +++++++-
pc-bios/s390-ccw/netmain.c | 1 +
pc-bios/s390-ccw/s390-arch.h | 10 ++++++++--
pc-bios/s390-ccw/s390-ccw.h | 1 +
5 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/jump2ipl.c b/pc-bios/s390-ccw/jump2ipl.c
index 266f1502b9675d2a58cb7ae8adbb..1489e5043c85863df9e91951fbd1 100644
--- a/pc-bios/s390-ccw/jump2ipl.c
+++ b/pc-bios/s390-ccw/jump2ipl.c
@@ -35,6 +35,7 @@ void jump_to_IPL_code(uint64_t address)
{
/* store the subsystem information _after_ the bootmap was loaded */
write_subsystem_identification();
+ write_iplb_location();
/* prevent unknown IPL types in the guest */
if (iplb.pbt == S390_IPL_TYPE_QEMU_SCSI) {
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index a21b38628075b450477af9565fd6..4e65b411e1d890ba7f8536d7b99f 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -9,6 +9,7 @@
*/
#include "libc.h"
+#include "helper.h"
#include "s390-arch.h"
#include "s390-ccw.h"
#include "cio.h"
@@ -22,7 +23,7 @@ QemuIplParameters qipl;
IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static bool have_iplb;
static uint16_t cutype;
-LowCore const *lowcore; /* Yes, this *is* a pointer to address 0 */
+LowCore *lowcore; /* Yes, this *is* a pointer to address 0 */
#define LOADPARM_PROMPT "PROMPT "
#define LOADPARM_EMPTY " "
@@ -42,6 +43,11 @@ void write_subsystem_identification(void)
*zeroes = 0;
}
+void write_iplb_location(void)
+{
+ lowcore->ptr_iplb = ptr2u32(&iplb);
+}
+
void panic(const char *string)
{
sclp_print(string);
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index f2dcc01e27257696d110b12164c9..309ffa30d992207770d51ffc7d9a 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -40,6 +40,7 @@
#define DEFAULT_TFTP_RETRIES 20
extern char _start[];
+void write_iplb_location(void) {}
#define KERNEL_ADDR ((void *)0L)
#define KERNEL_MAX_SIZE ((long)_start)
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
index 504fc7c2f09878cb6b37e307bb20..5f36361c0223d43439a249e84040 100644
--- a/pc-bios/s390-ccw/s390-arch.h
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -36,7 +36,13 @@ typedef struct LowCore {
/* prefix area: defined by architecture */
PSWLegacy ipl_psw; /* 0x000 */
uint32_t ccw1[2]; /* 0x008 */
- uint32_t ccw2[2]; /* 0x010 */
+ union {
+ uint32_t ccw2[2]; /* 0x010 */
+ struct {
+ uint32_t reserved10;
+ uint32_t ptr_iplb;
+ };
+ };
uint8_t pad1[0x80 - 0x18]; /* 0x018 */
uint32_t ext_params; /* 0x080 */
uint16_t cpu_addr; /* 0x084 */
@@ -85,7 +91,7 @@ typedef struct LowCore {
PSW io_new_psw; /* 0x1f0 */
} __attribute__((packed, aligned(8192))) LowCore;
-extern LowCore const *lowcore;
+extern LowCore *lowcore;
static inline void set_prefix(uint32_t address)
{
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 11bce7d73c85581e561d5802059b..21f27e79906ea297c4480eeaee2e 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -57,6 +57,7 @@ void consume_io_int(void);
/* main.c */
void panic(const char *string);
void write_subsystem_identification(void);
+void write_iplb_location(void);
extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
unsigned int get_loadparm_index(void);

7
qemu.changes
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@ -1,3 +1,10 @@
-------------------------------------------------------------------
Fri Mar 20 15:28:35 UTC 2020 - Liang Yan <lyan@suse.com>
- Fix the issue that s390x could not read IPL channel program when using
dasd as boot device (bsc#1163140)
pc-bios-s390x-Save-iplb-location-in-lowc.patch
-------------------------------------------------------------------
Mon Mar 16 19:58:35 UTC 2020 - Bruce Rogers <brogers@suse.com>

2
qemu.spec
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@ -244,6 +244,7 @@ Patch00113: tests-Disable-some-block-tests-for-now.patch
Patch00114: test-add-mapping-from-arch-of-i686-to-qe.patch
Patch00115: roms-Makefile-enable-cross-compile-for-b.patch
Patch00116: hw-i386-disable-smbus-migration-for-xenf.patch
Patch00117: pc-bios-s390x-Save-iplb-location-in-lowc.patch
# Patches applied in roms/seabios/:
Patch01000: seabios-use-python2-explicitly-as-needed.patch
Patch01001: seabios-switch-to-python3-as-needed.patch
@ -1076,6 +1077,7 @@ This package provides a service file for starting and stopping KSM.
%patch00114 -p1
%patch00115 -p1
%patch00116 -p1
%patch00117 -p1
%patch01000 -p1
%patch01001 -p1
%patch01002 -p1