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Merge tag 's390-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Browse Source 
Pull s390 updates from Vasily Gorbik:

 - Add support for IBM z15 machines.

 - Add SHA3 and CCA AES cipher key support in zcrypt and pkey
   refactoring.

 - Move to arch_stack_walk infrastructure for the stack unwinder.

 - Various kasan fixes and improvements.

 - Various command line parsing fixes.

 - Improve decompressor phase debuggability.

 - Lift no bss usage restriction for the early code.

 - Use refcount_t for reference counters for couple of places in mm
   code.

 - Logging improvements and return code fix in vfio-ccw code.

 - Couple of zpci fixes and minor refactoring.

 - Remove some outdated documentation.

 - Fix secure boot detection.

 - Other various minor code clean ups.

* tag 's390-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (48 commits)
  s390: remove pointless drivers-y in drivers/s390/Makefile
  s390/cpum_sf: Fix line length and format string
  s390/pci: fix MSI message data
  s390: add support for IBM z15 machines
  s390/crypto: Support for SHA3 via CPACF (MSA6)
  s390/startup: add pgm check info printing
  s390/crypto: xts-aes-s390 fix extra run-time crypto self tests finding
  vfio-ccw: fix error return code in vfio_ccw_sch_init()
  s390: vfio-ap: fix warning reset not completed
  s390/base: remove unused s390_base_mcck_handler
  s390/sclp: Fix bit checked for has_sipl
  s390/zcrypt: fix wrong handling of cca cipher keygenflags
  s390/kasan: add kdump support
  s390/setup: avoid using strncmp with hardcoded length
  s390/sclp: avoid using strncmp with hardcoded length
  s390/module: avoid using strncmp with hardcoded length
  s390/pci: avoid using strncmp with hardcoded length
  s390/kaslr: reserve memory for kasan usage
  s390/mem_detect: provide single get_mem_detect_end
  s390/cmma: reuse kstrtobool for option value parsing
  ...
This commit is contained in:
Linus Torvalds
2019-09-17 14:04:43 -07:00
parent 1e24aaabde 2735913c10
commit d590284419
73 changed files with 4053 additions and 4129 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/s390/boot/Makefile
View File

@@ -36,7 +36,7 @@ CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o
obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
obj-y += version.o ctype.o text_dma.o
obj-y += version.o pgm_check_info.o ctype.o text_dma.o
obj-$(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) += uv.o
obj-$(CONFIG_RELOCATABLE) += machine_kexec_reloc.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o

1
arch/s390/boot/boot.h
View File

@@ -10,6 +10,7 @@ void parse_boot_command_line(void);
void setup_memory_end(void);
void verify_facilities(void);
void print_missing_facilities(void);
void print_pgm_check_info(void);
unsigned long get_random_base(unsigned long safe_addr);
extern int kaslr_enabled;

3
arch/s390/boot/compressed/.gitignore vendored
View File

@@ -1,5 +1,2 @@
sizes.h
vmlinux
vmlinux.lds
vmlinux.scr.lds
vmlinux.bin.full

3
arch/s390/boot/compressed/vmlinux.lds.S
View File

@@ -37,9 +37,9 @@ SECTIONS
* .dma section for code, data, ex_table that need to stay below 2 GB,
* even when the kernel is relocate: above 2 GB.
*/
. = ALIGN(PAGE_SIZE);
_sdma = .;
.dma.text : {
. = ALIGN(PAGE_SIZE);
_stext_dma = .;
*(.dma.text)
. = ALIGN(PAGE_SIZE);
@@ -52,6 +52,7 @@ SECTIONS
_stop_dma_ex_table = .;
}
.dma.data : { *(.dma.data) }
. = ALIGN(PAGE_SIZE);
_edma = .;
BOOT_DATA

32
arch/s390/boot/head.S
View File

@@ -60,8 +60,10 @@ __HEAD
.long 0x02000690,0x60000050
.long 0x020006e0,0x20000050
.org 0x1a0
.org __LC_RST_NEW_PSW # 0x1a0
.quad 0,iplstart
.org __LC_PGM_NEW_PSW # 0x1d0
.quad 0x0000000180000000,startup_pgm_check_handler
.org 0x200
@@ -351,6 +353,34 @@ ENTRY(startup_kdump)
#include "head_kdump.S"
#
# This program check is active immediately after kernel start
# and until early_pgm_check_handler is set in kernel/early.c
# It simply saves general/control registers and psw in
# the save area and does disabled wait with a faulty address.
#
ENTRY(startup_pgm_check_handler)
stmg %r0,%r15,__LC_SAVE_AREA_SYNC
la %r1,4095
stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r1)
mvc __LC_GPREGS_SAVE_AREA-4095(128,%r1),__LC_SAVE_AREA_SYNC
mvc __LC_PSW_SAVE_AREA-4095(16,%r1),__LC_PGM_OLD_PSW
mvc __LC_RETURN_PSW(16),__LC_PGM_OLD_PSW
ni __LC_RETURN_PSW,0xfc # remove IO and EX bits
ni __LC_RETURN_PSW+1,0xfb # remove MCHK bit
oi __LC_RETURN_PSW+1,0x2 # set wait state bit
larl %r2,.Lold_psw_disabled_wait
stg %r2,__LC_PGM_NEW_PSW+8
l %r15,.Ldump_info_stack-.Lold_psw_disabled_wait(%r2)
brasl %r14,print_pgm_check_info
.Lold_psw_disabled_wait:
la %r1,4095
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
lpswe __LC_RETURN_PSW # disabled wait
.Ldump_info_stack:
.long 0x5000 + PAGE_SIZE - STACK_FRAME_OVERHEAD
ENDPROC(startup_pgm_check_handler)
#
# params at 10400 (setup.h)
# Must be keept in sync with struct parmarea in setup.h

11
arch/s390/boot/ipl_parm.c
View File

@@ -7,6 +7,7 @@
#include <asm/sections.h>
#include <asm/boot_data.h>
#include <asm/facility.h>
#include <asm/pgtable.h>
#include <asm/uv.h>
#include "boot.h"
@@ -14,6 +15,7 @@ char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
struct ipl_parameter_block __bootdata_preserved(ipl_block);
int __bootdata_preserved(ipl_block_valid);
unsigned long __bootdata(vmalloc_size) = VMALLOC_DEFAULT_SIZE;
unsigned long __bootdata(memory_end);
int __bootdata(memory_end_set);
int __bootdata(noexec_disabled);
@@ -219,18 +221,21 @@ void parse_boot_command_line(void)
while (*args) {
args = next_arg(args, &param, &val);
if (!strcmp(param, "mem")) {
memory_end = memparse(val, NULL);
if (!strcmp(param, "mem") && val) {
memory_end = round_down(memparse(val, NULL), PAGE_SIZE);
memory_end_set = 1;
}
if (!strcmp(param, "vmalloc") && val)
vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
if (!strcmp(param, "noexec")) {
rc = kstrtobool(val, &enabled);
if (!rc && !enabled)
noexec_disabled = 1;
}
if (!strcmp(param, "facilities"))
if (!strcmp(param, "facilities") && val)
modify_fac_list(val);
if (!strcmp(param, "nokaslr"))

41
arch/s390/boot/kaslr.c
View File

@@ -3,6 +3,7 @@
* Copyright IBM Corp. 2019
*/
#include <asm/mem_detect.h>
#include <asm/pgtable.h>
#include <asm/cpacf.h>
#include <asm/timex.h>
#include <asm/sclp.h>
@@ -90,8 +91,10 @@ static unsigned long get_random(unsigned long limit)
unsigned long get_random_base(unsigned long safe_addr)
{
unsigned long memory_limit = memory_end_set ? memory_end : 0;
unsigned long base, start, end, kernel_size;
unsigned long block_sum, offset;
unsigned long kasan_needs;
int i;
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && INITRD_START && INITRD_SIZE) {
@@ -100,14 +103,36 @@ unsigned long get_random_base(unsigned long safe_addr)
}
safe_addr = ALIGN(safe_addr, THREAD_SIZE);
if ((IS_ENABLED(CONFIG_KASAN))) {
/*
* Estimate kasan memory requirements, which it will reserve
* at the very end of available physical memory. To estimate
* that, we take into account that kasan would require
* 1/8 of available physical memory (for shadow memory) +
* creating page tables for the whole memory + shadow memory
* region (1 + 1/8). To keep page tables estimates simple take
* the double of combined ptes size.
*/
memory_limit = get_mem_detect_end();
if (memory_end_set && memory_limit > memory_end)
memory_limit = memory_end;
/* for shadow memory */
kasan_needs = memory_limit / 8;
/* for paging structures */
kasan_needs += (memory_limit + kasan_needs) / PAGE_SIZE /
_PAGE_ENTRIES * _PAGE_TABLE_SIZE * 2;
memory_limit -= kasan_needs;
}
kernel_size = vmlinux.image_size + vmlinux.bss_size;
block_sum = 0;
for_each_mem_detect_block(i, &start, &end) {
if (memory_end_set) {
if (start >= memory_end)
if (memory_limit) {
if (start >= memory_limit)
break;
if (end > memory_end)
end = memory_end;
if (end > memory_limit)
end = memory_limit;
}
if (end - start < kernel_size)
continue;
@@ -125,11 +150,11 @@ unsigned long get_random_base(unsigned long safe_addr)
base = safe_addr;
block_sum = offset = 0;
for_each_mem_detect_block(i, &start, &end) {
if (memory_end_set) {
if (start >= memory_end)
if (memory_limit) {
if (start >= memory_limit)
break;
if (end > memory_end)
end = memory_end;
if (end > memory_limit)
end = memory_limit;
}
if (end - start < kernel_size)
continue;

7
arch/s390/boot/mem_detect.c
View File

@@ -63,13 +63,6 @@ void add_mem_detect_block(u64 start, u64 end)
mem_detect.count++;
}
static unsigned long get_mem_detect_end(void)
{
if (mem_detect.count)
return __get_mem_detect_block_ptr(mem_detect.count - 1)->end;
return 0;
}
static int __diag260(unsigned long rx1, unsigned long rx2)
{
register unsigned long _rx1 asm("2") = rx1;

90
arch/s390/boot/pgm_check_info.c Normal file
View File

@@ -0,0 +1,90 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/string.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
#include "boot.h"
const char hex_asc[] = "0123456789abcdef";
#define add_val_as_hex(dst, val) \
__add_val_as_hex(dst, (const unsigned char *)&val, sizeof(val))
static char *__add_val_as_hex(char *dst, const unsigned char *src, size_t count)
{
while (count--)
dst = hex_byte_pack(dst, *src++);
return dst;
}
static char *add_str(char *dst, char *src)
{
strcpy(dst, src);
return dst + strlen(dst);
}
void print_pgm_check_info(void)
{
struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
unsigned short ilc = S390_lowcore.pgm_ilc >> 1;
char buf[256];
int row, col;
char *p;
add_str(buf, "Linux version ");
strlcat(buf, kernel_version, sizeof(buf));
sclp_early_printk(buf);
p = add_str(buf, "Kernel fault: interruption code ");
p = add_val_as_hex(buf + strlen(buf), S390_lowcore.pgm_code);
p = add_str(p, " ilc:");
*p++ = hex_asc_lo(ilc);
add_str(p, "\n");
sclp_early_printk(buf);
p = add_str(buf, "PSW : ");
p = add_val_as_hex(p, S390_lowcore.psw_save_area.mask);
p = add_str(p, " ");
p = add_val_as_hex(p, S390_lowcore.psw_save_area.addr);
add_str(p, "\n");
sclp_early_printk(buf);
p = add_str(buf, " R:");
*p++ = hex_asc_lo(psw->per);
p = add_str(p, " T:");
*p++ = hex_asc_lo(psw->dat);
p = add_str(p, " IO:");
*p++ = hex_asc_lo(psw->io);
p = add_str(p, " EX:");
*p++ = hex_asc_lo(psw->ext);
p = add_str(p, " Key:");
*p++ = hex_asc_lo(psw->key);
p = add_str(p, " M:");
*p++ = hex_asc_lo(psw->mcheck);
p = add_str(p, " W:");
*p++ = hex_asc_lo(psw->wait);
p = add_str(p, " P:");
*p++ = hex_asc_lo(psw->pstate);
p = add_str(p, " AS:");
*p++ = hex_asc_lo(psw->as);
p = add_str(p, " CC:");
*p++ = hex_asc_lo(psw->cc);
p = add_str(p, " PM:");
*p++ = hex_asc_lo(psw->pm);
p = add_str(p, " RI:");
*p++ = hex_asc_lo(psw->ri);
p = add_str(p, " EA:");
*p++ = hex_asc_lo(psw->eaba);
add_str(p, "\n");
sclp_early_printk(buf);
for (row = 0; row < 4; row++) {
p = add_str(buf, row == 0 ? "GPRS:" : " ");
for (col = 0; col < 4; col++) {
p = add_str(p, " ");
p = add_val_as_hex(p, S390_lowcore.gpregs_save_area[row * 4 + col]);
}
add_str(p, "\n");
sclp_early_printk(buf);
}
}

6
arch/s390/boot/startup.c
View File

@@ -112,6 +112,11 @@ static void handle_relocs(unsigned long offset)
}
}
static void clear_bss_section(void)
{
memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size);
}
void startup_kernel(void)
{
unsigned long random_lma;
@@ -151,6 +156,7 @@ void startup_kernel(void)
} else if (__kaslr_offset)
memcpy((void *)vmlinux.default_lma, img, vmlinux.image_size);
clear_bss_section();
copy_bootdata();
if (IS_ENABLED(CONFIG_RELOCATABLE))
handle_relocs(__kaslr_offset);