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Diffstat (limited to 'arch/s390/kernel/setup.c')
-rw-r--r--arch/s390/kernel/setup.c149
1 files changed, 130 insertions, 19 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 72dd23ef771b..f8544d517430 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -50,6 +50,7 @@
#include <linux/compat.h>
#include <linux/start_kernel.h>
+#include <asm/boot_data.h>
#include <asm/ipl.h>
#include <asm/facility.h>
#include <asm/smp.h>
@@ -65,11 +66,13 @@
#include <asm/diag.h>
#include <asm/os_info.h>
#include <asm/sclp.h>
+#include <asm/stacktrace.h>
#include <asm/sysinfo.h>
#include <asm/numa.h>
#include <asm/alternative.h>
#include <asm/nospec-branch.h>
#include <asm/mem_detect.h>
+#include <asm/uv.h>
#include "entry.h"
/*
@@ -89,12 +92,25 @@ char elf_platform[ELF_PLATFORM_SIZE];
unsigned long int_hwcap = 0;
+#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
+int __bootdata_preserved(prot_virt_guest);
+#endif
+
int __bootdata(noexec_disabled);
int __bootdata(memory_end_set);
unsigned long __bootdata(memory_end);
unsigned long __bootdata(max_physmem_end);
struct mem_detect_info __bootdata(mem_detect);
+struct exception_table_entry *__bootdata_preserved(__start_dma_ex_table);
+struct exception_table_entry *__bootdata_preserved(__stop_dma_ex_table);
+unsigned long __bootdata_preserved(__swsusp_reset_dma);
+unsigned long __bootdata_preserved(__stext_dma);
+unsigned long __bootdata_preserved(__etext_dma);
+unsigned long __bootdata_preserved(__sdma);
+unsigned long __bootdata_preserved(__edma);
+unsigned long __bootdata_preserved(__kaslr_offset);
+
unsigned long VMALLOC_START;
EXPORT_SYMBOL(VMALLOC_START);
@@ -369,7 +385,7 @@ void __init arch_call_rest_init(void)
: : [_frame] "a" (frame));
}
-static void __init setup_lowcore(void)
+static void __init setup_lowcore_dat_off(void)
{
struct lowcore *lc;
@@ -378,21 +394,22 @@ static void __init setup_lowcore(void)
*/
BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * PAGE_SIZE);
lc = memblock_alloc_low(sizeof(*lc), sizeof(*lc));
+ if (!lc)
+ panic("%s: Failed to allocate %zu bytes align=%zx\n",
+ __func__, sizeof(*lc), sizeof(*lc));
+
lc->restart_psw.mask = PSW_KERNEL_BITS;
lc->restart_psw.addr = (unsigned long) restart_int_handler;
- lc->external_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_DAT | PSW_MASK_MCHECK;
+ lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->external_new_psw.addr = (unsigned long) ext_int_handler;
lc->svc_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
+ PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
lc->svc_new_psw.addr = (unsigned long) system_call;
- lc->program_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_DAT | PSW_MASK_MCHECK;
+ lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler;
- lc->io_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_DAT | PSW_MASK_MCHECK;
+ lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->io_new_psw.addr = (unsigned long) io_int_handler;
lc->clock_comparator = clock_comparator_max;
lc->nodat_stack = ((unsigned long) &init_thread_union)
@@ -422,6 +439,9 @@ static void __init setup_lowcore(void)
* all CPUs in cast *one* of them does a PSW restart.
*/
restart_stack = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+ if (!restart_stack)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+ __func__, THREAD_SIZE, THREAD_SIZE);
restart_stack += STACK_INIT_OFFSET;
/*
@@ -452,6 +472,16 @@ static void __init setup_lowcore(void)
lowcore_ptr[0] = lc;
}
+static void __init setup_lowcore_dat_on(void)
+{
+ __ctl_clear_bit(0, 28);
+ S390_lowcore.external_new_psw.mask |= PSW_MASK_DAT;
+ S390_lowcore.svc_new_psw.mask |= PSW_MASK_DAT;
+ S390_lowcore.program_new_psw.mask |= PSW_MASK_DAT;
+ S390_lowcore.io_new_psw.mask |= PSW_MASK_DAT;
+ __ctl_set_bit(0, 28);
+}
+
static struct resource code_resource = {
.name = "Kernel code",
.flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
@@ -488,6 +518,9 @@ static void __init setup_resources(void)
for_each_memblock(memory, reg) {
res = memblock_alloc(sizeof(*res), 8);
+ if (!res)
+ panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+ __func__, sizeof(*res), 8);
res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
res->name = "System RAM";
@@ -502,6 +535,9 @@ static void __init setup_resources(void)
continue;
if (std_res->end > res->end) {
sub_res = memblock_alloc(sizeof(*sub_res), 8);
+ if (!sub_res)
+ panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+ __func__, sizeof(*sub_res), 8);
*sub_res = *std_res;
sub_res->end = res->end;
std_res->start = res->end + 1;
@@ -716,6 +752,15 @@ static void __init reserve_initrd(void)
#endif
}
+/*
+ * Reserve the memory area used to pass the certificate lists
+ */
+static void __init reserve_certificate_list(void)
+{
+ if (ipl_cert_list_addr)
+ memblock_reserve(ipl_cert_list_addr, ipl_cert_list_size);
+}
+
static void __init reserve_mem_detect_info(void)
{
unsigned long start, size;
@@ -794,18 +839,10 @@ static void __init reserve_kernel(void)
{
unsigned long start_pfn = PFN_UP(__pa(_end));
-#ifdef CONFIG_DMA_API_DEBUG
- /*
- * DMA_API_DEBUG code stumbles over addresses from the
- * range [PARMAREA_END, _stext]. Mark the memory as reserved
- * so it is not used for CONFIG_DMA_API_DEBUG=y.
- */
- memblock_reserve(0, PFN_PHYS(start_pfn));
-#else
- memblock_reserve(0, PARMAREA_END);
+ memblock_reserve(0, HEAD_END);
memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn)
- (unsigned long)_stext);
-#endif
+ memblock_reserve(__sdma, __edma - __sdma);
}
static void __init setup_memory(void)
@@ -903,7 +940,15 @@ static int __init setup_hwcaps(void)
elf_hwcap |= HWCAP_S390_VXRS_EXT;
if (test_facility(135))
elf_hwcap |= HWCAP_S390_VXRS_BCD;
+ if (test_facility(148))
+ elf_hwcap |= HWCAP_S390_VXRS_EXT2;
+ if (test_facility(152))
+ elf_hwcap |= HWCAP_S390_VXRS_PDE;
}
+ if (test_facility(150))
+ elf_hwcap |= HWCAP_S390_SORT;
+ if (test_facility(151))
+ elf_hwcap |= HWCAP_S390_DFLT;
/*
* Guarded storage support HWCAP_S390_GS is bit 12.
@@ -968,6 +1013,9 @@ static void __init setup_randomness(void)
vmms = (struct sysinfo_3_2_2 *) memblock_phys_alloc(PAGE_SIZE,
PAGE_SIZE);
+ if (!vmms)
+ panic("Failed to allocate memory for sysinfo structure\n");
+
if (stsi(vmms, 3, 2, 2) == 0 && vmms->count)
add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count);
memblock_free((unsigned long) vmms, PAGE_SIZE);
@@ -990,6 +1038,57 @@ static void __init setup_task_size(void)
}
/*
+ * Issue diagnose 318 to set the control program name and
+ * version codes.
+ */
+static void __init setup_control_program_code(void)
+{
+ union diag318_info diag318_info = {
+ .cpnc = CPNC_LINUX,
+ .cpvc_linux = 0,
+ .cpvc_distro = {0},
+ };
+
+ if (!sclp.has_diag318)
+ return;
+
+ diag_stat_inc(DIAG_STAT_X318);
+ asm volatile("diag %0,0,0x318\n" : : "d" (diag318_info.val));
+}
+
+/*
+ * Print the component list from the IPL report
+ */
+static void __init log_component_list(void)
+{
+ struct ipl_rb_component_entry *ptr, *end;
+ char *str;
+
+ if (!early_ipl_comp_list_addr)
+ return;
+ if (ipl_block.hdr.flags & IPL_PL_FLAG_IPLSR)
+ pr_info("Linux is running with Secure-IPL enabled\n");
+ else
+ pr_info("Linux is running with Secure-IPL disabled\n");
+ ptr = (void *) early_ipl_comp_list_addr;
+ end = (void *) ptr + early_ipl_comp_list_size;
+ pr_info("The IPL report contains the following components:\n");
+ while (ptr < end) {
+ if (ptr->flags & IPL_RB_COMPONENT_FLAG_SIGNED) {
+ if (ptr->flags & IPL_RB_COMPONENT_FLAG_VERIFIED)
+ str = "signed, verified";
+ else
+ str = "signed, verification failed";
+ } else {
+ str = "not signed";
+ }
+ pr_info("%016llx - %016llx (%s)\n",
+ ptr->addr, ptr->addr + ptr->len, str);
+ ptr++;
+ }
+}
+
+/*
* Setup function called from init/main.c just after the banner
* was printed.
*/
@@ -1006,6 +1105,10 @@ void __init setup_arch(char **cmdline_p)
pr_info("Linux is running under KVM in 64-bit mode\n");
else if (MACHINE_IS_LPAR)
pr_info("Linux is running natively in 64-bit mode\n");
+ else
+ pr_info("Linux is running as a guest in 64-bit mode\n");
+
+ log_component_list();
/* Have one command line that is parsed and saved in /proc/cmdline */
/* boot_command_line has been already set up in early.c */
@@ -1031,12 +1134,14 @@ void __init setup_arch(char **cmdline_p)
os_info_init();
setup_ipl();
setup_task_size();
+ setup_control_program_code();
/* Do some memory reservations *before* memory is added to memblock */
reserve_memory_end();
reserve_oldmem();
reserve_kernel();
reserve_initrd();
+ reserve_certificate_list();
reserve_mem_detect_info();
memblock_allow_resize();
@@ -1070,7 +1175,7 @@ void __init setup_arch(char **cmdline_p)
#endif
setup_resources();
- setup_lowcore();
+ setup_lowcore_dat_off();
smp_fill_possible_mask();
cpu_detect_mhz_feature();
cpu_init();
@@ -1083,6 +1188,12 @@ void __init setup_arch(char **cmdline_p)
*/
paging_init();
+ /*
+ * After paging_init created the kernel page table, the new PSWs
+ * in lowcore can now run with DAT enabled.
+ */
+ setup_lowcore_dat_on();
+
/* Setup default console */
conmode_default();
set_preferred_console();
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-05-02 16:20:07 +0200