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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-23 06:14:06 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-23 06:14:06 -1000
commitcd4175b11685b11c40e31a03e05084cc212b0649 (patch)
tree985ed262152992c568d33a7b8e5b1e720d9e3f71
parentded85032006d2d294cb32ed010c8fd3a13ef18cb (diff)
parent8c031ba63f8f2a9efc471cb45b2ff18271556544 (diff)
downloadlinux-stericsson-cd4175b11685b11c40e31a03e05084cc212b0649.tar.gz
Merge branch 'parisc-4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller: - Unbreak parisc bootloader by avoiding a gcc-7 optimization to convert multiple byte-accesses into one word-access. - Add missing HWPOISON page fault handler code. I completely missed that when I added HWPOISON support during this merge window and it only showed up now with the madvise07 LTP test case. - Fix backtrace unwinding to stop when stack start has been reached. - Issue warning if initrd has been loaded into memory regions with broken RAM modules. - Fix HPMC handler (parisc hardware fault handler) to comply with architecture specification. - Avoid compiler warnings about too large frame sizes. - Minor init-section fixes. * 'parisc-4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Unbreak bootloader due to gcc-7 optimizations parisc: Reintroduce option to gzip-compress the kernel parisc: Add HWPOISON page fault handler code parisc: Move init_per_cpu() into init section parisc: Check if initrd was loaded into broken RAM parisc: Add PDCE_CHECK instruction to HPMC handler parisc: Add wrapper for pdc_instr() firmware function parisc: Move start_parisc() into init section parisc: Stop unwinding at start of stack parisc: Fix too large frame size warnings
-rw-r--r--arch/parisc/Kconfig12
-rw-r--r--arch/parisc/Makefile5
-rw-r--r--arch/parisc/boot/compressed/Makefile2
-rw-r--r--arch/parisc/boot/compressed/misc.c3
-rw-r--r--arch/parisc/include/asm/pdc.h1
-rw-r--r--arch/parisc/include/asm/smp.h1
-rw-r--r--arch/parisc/kernel/firmware.c20
-rw-r--r--arch/parisc/kernel/pdt.c9
-rw-r--r--arch/parisc/kernel/processor.c2
-rw-r--r--arch/parisc/kernel/setup.c6
-rw-r--r--arch/parisc/kernel/smp.c3
-rw-r--r--arch/parisc/kernel/traps.c10
-rw-r--r--arch/parisc/kernel/unwind.c12
-rw-r--r--arch/parisc/mm/fault.c33
-rw-r--r--lib/Kconfig.debug3
15 files changed, 108 insertions, 14 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index ba7b7ddc3844..a57dedbfc7b7 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -257,6 +257,18 @@ config PARISC_PAGE_SIZE_64KB
endchoice
+config PARISC_SELF_EXTRACT
+ bool "Build kernel as self-extracting executable"
+ default y
+ help
+ Say Y if you want to build the parisc kernel as a kind of
+ self-extracting executable.
+
+ If you say N here, the kernel will be compressed with gzip
+ which can be loaded by the palo bootloader directly too.
+
+ If you don't know what to do here, say Y.
+
config SMP
bool "Symmetric multi-processing support"
---help---
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 58fae5d2449d..01946ebaff72 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -129,8 +129,13 @@ Image: vmlinux
bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+ifdef CONFIG_PARISC_SELF_EXTRACT
vmlinuz: bzImage
$(OBJCOPY) $(boot)/bzImage $@
+else
+vmlinuz: vmlinux
+ @gzip -cf -9 $< > $@
+endif
install:
$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
diff --git a/arch/parisc/boot/compressed/Makefile b/arch/parisc/boot/compressed/Makefile
index 5450a11c9d10..7d7e594bda36 100644
--- a/arch/parisc/boot/compressed/Makefile
+++ b/arch/parisc/boot/compressed/Makefile
@@ -15,7 +15,7 @@ targets += misc.o piggy.o sizes.h head.o real2.o firmware.o
KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks
-KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs
+KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs -Os
ifndef CONFIG_64BIT
KBUILD_CFLAGS += -mfast-indirect-calls
endif
diff --git a/arch/parisc/boot/compressed/misc.c b/arch/parisc/boot/compressed/misc.c
index 13a4bf9ac4da..9345b44b86f0 100644
--- a/arch/parisc/boot/compressed/misc.c
+++ b/arch/parisc/boot/compressed/misc.c
@@ -24,7 +24,8 @@
/* Symbols defined by linker scripts */
extern char input_data[];
extern int input_len;
-extern __le32 output_len; /* at unaligned address, little-endian */
+/* output_len is inserted by the linker possibly at an unaligned address */
+extern __le32 output_len __aligned(1);
extern char _text, _end;
extern char _bss, _ebss;
extern char _startcode_end;
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index 26b4455baa83..510341f62d97 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -280,6 +280,7 @@ void setup_pdc(void); /* in inventory.c */
/* wrapper-functions from pdc.c */
int pdc_add_valid(unsigned long address);
+int pdc_instr(unsigned int *instr);
int pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len);
int pdc_chassis_disp(unsigned long disp);
int pdc_chassis_warn(unsigned long *warn);
diff --git a/arch/parisc/include/asm/smp.h b/arch/parisc/include/asm/smp.h
index a5dc9066c6d8..ad9c9c3b4136 100644
--- a/arch/parisc/include/asm/smp.h
+++ b/arch/parisc/include/asm/smp.h
@@ -1,6 +1,7 @@
#ifndef __ASM_SMP_H
#define __ASM_SMP_H
+extern int init_per_cpu(int cpuid);
#if defined(CONFIG_SMP)
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index ab80e5c6f651..6d471c00c71a 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -233,6 +233,26 @@ int pdc_add_valid(unsigned long address)
EXPORT_SYMBOL(pdc_add_valid);
/**
+ * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
+ * @instr: Pointer to variable which will get instruction opcode.
+ *
+ * The return value is PDC_OK (0) in case call succeeded.
+ */
+int __init pdc_instr(unsigned int *instr)
+{
+ int retval;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pdc_lock, flags);
+ retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
+ convert_to_wide(pdc_result);
+ *instr = pdc_result[0];
+ spin_unlock_irqrestore(&pdc_lock, flags);
+
+ return retval;
+}
+
+/**
* pdc_chassis_info - Return chassis information.
* @result: The return buffer.
* @chassis_info: The memory buffer address.
diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
index 05730a83895c..00aed082969b 100644
--- a/arch/parisc/kernel/pdt.c
+++ b/arch/parisc/kernel/pdt.c
@@ -15,6 +15,7 @@
#include <linux/memblock.h>
#include <linux/seq_file.h>
#include <linux/kthread.h>
+#include <linux/initrd.h>
#include <asm/pdc.h>
#include <asm/pdcpat.h>
@@ -216,8 +217,16 @@ void __init pdc_pdt_init(void)
}
for (i = 0; i < pdt_status.pdt_entries; i++) {
+ unsigned long addr;
+
report_mem_err(pdt_entry[i]);
+ addr = pdt_entry[i] & PDT_ADDR_PHYS_MASK;
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) &&
+ addr >= initrd_start && addr < initrd_end)
+ pr_crit("CRITICAL: initrd possibly broken "
+ "due to bad memory!\n");
+
/* mark memory page bad */
memblock_reserve(pdt_entry[i] & PAGE_MASK, PAGE_SIZE);
}
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index a778bd3c107c..e120d63c1b28 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -317,7 +317,7 @@ void __init collect_boot_cpu_data(void)
*
* o Enable CPU profiling hooks.
*/
-int init_per_cpu(int cpunum)
+int __init init_per_cpu(int cpunum)
{
int ret;
struct pdc_coproc_cfg coproc_cfg;
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index dee6f9d6a153..f7d0c3b33d70 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -38,6 +38,7 @@
#include <linux/export.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
+#include <linux/start_kernel.h>
#include <asm/processor.h>
#include <asm/sections.h>
@@ -48,6 +49,7 @@
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/unwind.h>
+#include <asm/smp.h>
static char __initdata command_line[COMMAND_LINE_SIZE];
@@ -115,7 +117,6 @@ void __init dma_ops_init(void)
}
#endif
-extern int init_per_cpu(int cpuid);
extern void collect_boot_cpu_data(void);
void __init setup_arch(char **cmdline_p)
@@ -398,9 +399,8 @@ static int __init parisc_init(void)
}
arch_initcall(parisc_init);
-void start_parisc(void)
+void __init start_parisc(void)
{
- extern void start_kernel(void);
extern void early_trap_init(void);
int ret, cpunum;
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 63365106ea19..30c28ab14540 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -255,12 +255,11 @@ void arch_send_call_function_single_ipi(int cpu)
static void __init
smp_cpu_init(int cpunum)
{
- extern int init_per_cpu(int); /* arch/parisc/kernel/processor.c */
extern void init_IRQ(void); /* arch/parisc/kernel/irq.c */
extern void start_cpu_itimer(void); /* arch/parisc/kernel/time.c */
/* Set modes and Enable floating point coprocessor */
- (void) init_per_cpu(cpunum);
+ init_per_cpu(cpunum);
disable_sr_hashing();
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 991654c88eec..230333157fe3 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -817,7 +817,7 @@ void __init initialize_ivt(const void *iva)
u32 check = 0;
u32 *ivap;
u32 *hpmcp;
- u32 length;
+ u32 length, instr;
if (strcmp((const char *)iva, "cows can fly"))
panic("IVT invalid");
@@ -827,6 +827,14 @@ void __init initialize_ivt(const void *iva)
for (i = 0; i < 8; i++)
*ivap++ = 0;
+ /*
+ * Use PDC_INSTR firmware function to get instruction that invokes
+ * PDCE_CHECK in HPMC handler. See programming note at page 1-31 of
+ * the PA 1.1 Firmware Architecture document.
+ */
+ if (pdc_instr(&instr) == PDC_OK)
+ ivap[0] = instr;
+
/* Compute Checksum for HPMC handler */
length = os_hpmc_size;
ivap[7] = length;
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 48dc7d4d20bb..caab39dfa95d 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/kallsyms.h>
#include <linux/sort.h>
+#include <linux/sched.h>
#include <linux/uaccess.h>
#include <asm/assembly.h>
@@ -279,6 +280,17 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
info->prev_sp = sp - 64;
info->prev_ip = 0;
+
+ /* The stack is at the end inside the thread_union
+ * struct. If we reach data, we have reached the
+ * beginning of the stack and should stop unwinding. */
+ if (info->prev_sp >= (unsigned long) task_thread_info(info->t) &&
+ info->prev_sp < ((unsigned long) task_thread_info(info->t)
+ + THREAD_SZ_ALGN)) {
+ info->prev_sp = 0;
+ break;
+ }
+
if (get_user(tmp, (unsigned long *)(info->prev_sp - RP_OFFSET)))
break;
info->prev_ip = tmp;
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 5b101f6a5607..e247edbca68e 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -17,6 +17,7 @@
#include <linux/interrupt.h>
#include <linux/extable.h>
#include <linux/uaccess.h>
+#include <linux/hugetlb.h>
#include <asm/traps.h>
@@ -261,7 +262,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
struct task_struct *tsk;
struct mm_struct *mm;
unsigned long acc_type;
- int fault;
+ int fault = 0;
unsigned int flags;
if (faulthandler_disabled())
@@ -315,7 +316,8 @@ good_area:
goto out_of_memory;
else if (fault & VM_FAULT_SIGSEGV)
goto bad_area;
- else if (fault & VM_FAULT_SIGBUS)
+ else if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON|
+ VM_FAULT_HWPOISON_LARGE))
goto bad_area;
BUG();
}
@@ -352,8 +354,7 @@ bad_area:
if (user_mode(regs)) {
struct siginfo si;
-
- show_signal_msg(regs, code, address, tsk, vma);
+ unsigned int lsb = 0;
switch (code) {
case 15: /* Data TLB miss fault/Data page fault */
@@ -386,6 +387,30 @@ bad_area:
si.si_code = (code == 26) ? SEGV_ACCERR : SEGV_MAPERR;
break;
}
+
+#ifdef CONFIG_MEMORY_FAILURE
+ if (fault & (VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE)) {
+ printk(KERN_ERR
+ "MCE: Killing %s:%d due to hardware memory corruption fault at %08lx\n",
+ tsk->comm, tsk->pid, address);
+ si.si_signo = SIGBUS;
+ si.si_code = BUS_MCEERR_AR;
+ }
+#endif
+
+ /*
+ * Either small page or large page may be poisoned.
+ * In other words, VM_FAULT_HWPOISON_LARGE and
+ * VM_FAULT_HWPOISON are mutually exclusive.
+ */
+ if (fault & VM_FAULT_HWPOISON_LARGE)
+ lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault));
+ else if (fault & VM_FAULT_HWPOISON)
+ lsb = PAGE_SHIFT;
+ else
+ show_signal_msg(regs, code, address, tsk, vma);
+ si.si_addr_lsb = lsb;
+
si.si_errno = 0;
si.si_addr = (void __user *) address;
force_sig_info(si.si_signo, &si, current);
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b19c491cbc4e..2689b7c50c52 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -219,7 +219,8 @@ config FRAME_WARN
range 0 8192
default 0 if KASAN
default 2048 if GCC_PLUGIN_LATENT_ENTROPY
- default 1024 if !64BIT
+ default 1280 if (!64BIT && PARISC)
+ default 1024 if (!64BIT && !PARISC)
default 2048 if 64BIT
help
Tell gcc to warn at build time for stack frames larger than this.