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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-21 19:02:53 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-21 19:02:53 +0200
commit75613939084f59c0848b146e54ba463dc494c433 (patch)
tree0ef2ea769366d4244e8a9e5188b275cabe2721cf /arch/powerpc/kernel/process.c
parentMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert... (diff)
parentpowerpc/8xx: Provide ptep_get() with 16k pages (diff)
downloadlinux-75613939084f59c0848b146e54ba463dc494c433.tar.xz
linux-75613939084f59c0848b146e54ba463dc494c433.zip
Merge tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman: - One fix for the interrupt rework we did last release which broke KVM-PR - Three commits fixing some fallout from the READ_ONCE() changes interacting badly with our 8xx 16K pages support, which uses a pte_t that is a structure of 4 actual PTEs - A cleanup of the 8xx pte_update() to use the newly added pmd_off() - A fix for a crash when handling an oops if CONFIG_DEBUG_VIRTUAL is enabled - A minor fix for the SPU syscall generation Thanks to Aneesh Kumar K.V, Christian Zigotzky, Christophe Leroy, Mike Rapoport, Nicholas Piggin. * tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/8xx: Provide ptep_get() with 16k pages mm: Allow arches to provide ptep_get() mm/gup: Use huge_ptep_get() in gup_hugepte() powerpc/syscalls: Use the number when building SPU syscall table powerpc/8xx: use pmd_off() to access a PMD entry in pte_update() powerpc/64s: Fix KVM interrupt using wrong save area powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r--arch/powerpc/kernel/process.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 30955a0c32d0..4650b9bb217f 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1252,29 +1252,31 @@ struct task_struct *__switch_to(struct task_struct *prev,
static void show_instructions(struct pt_regs *regs)
{
int i;
+ unsigned long nip = regs->nip;
unsigned long pc = regs->nip - (NR_INSN_TO_PRINT * 3 / 4 * sizeof(int));
printk("Instruction dump:");
+ /*
+ * If we were executing with the MMU off for instructions, adjust pc
+ * rather than printing XXXXXXXX.
+ */
+ if (!IS_ENABLED(CONFIG_BOOKE) && !(regs->msr & MSR_IR)) {
+ pc = (unsigned long)phys_to_virt(pc);
+ nip = (unsigned long)phys_to_virt(regs->nip);
+ }
+
for (i = 0; i < NR_INSN_TO_PRINT; i++) {
int instr;
if (!(i % 8))
pr_cont("\n");
-#if !defined(CONFIG_BOOKE)
- /* If executing with the IMMU off, adjust pc rather
- * than print XXXXXXXX.
- */
- if (!(regs->msr & MSR_IR))
- pc = (unsigned long)phys_to_virt(pc);
-#endif
-
if (!__kernel_text_address(pc) ||
get_kernel_nofault(instr, (const void *)pc)) {
pr_cont("XXXXXXXX ");
} else {
- if (regs->nip == pc)
+ if (nip == pc)
pr_cont("<%08x> ", instr);
else
pr_cont("%08x ", instr);