Merge tag 'loongarch-fixes-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Some trivial bug fixes for v6.4-rc7"

* tag 'loongarch-fixes-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: Fix debugfs_create_dir() error checking
  LoongArch: Avoid uninitialized alignment_mask
  LoongArch: Fix perf event id calculation
  LoongArch: Fix the write_fcsr() macro
  LoongArch: Let pmd_present() return true when splitting pmd

Author: torvalds

arch/loongarch/include/asm/loongarch.h

@@ -1496,7 +1496,7 @@ __BUILD_CSR_OP(tlbidx)
 #define write_fcsr(dest, val) \
 do {	\
 	__asm__ __volatile__(	\
-	"	movgr2fcsr	%0, "__stringify(dest)"	\n"	\
+	"	movgr2fcsr	"__stringify(dest)", %0	\n"	\
 	: : "r" (val));	\
 } while (0)
 

arch/loongarch/include/asm/pgtable-bits.h

@@ -22,12 +22,14 @@
 #define	_PAGE_PFN_SHIFT		12
 #define	_PAGE_SWP_EXCLUSIVE_SHIFT 23
 #define	_PAGE_PFN_END_SHIFT	48
+#define	_PAGE_PRESENT_INVALID_SHIFT 60
 #define	_PAGE_NO_READ_SHIFT	61
 #define	_PAGE_NO_EXEC_SHIFT	62
 #define	_PAGE_RPLV_SHIFT	63
 
 /* Used by software */
 #define _PAGE_PRESENT		(_ULCAST_(1) << _PAGE_PRESENT_SHIFT)
+#define _PAGE_PRESENT_INVALID	(_ULCAST_(1) << _PAGE_PRESENT_INVALID_SHIFT)
 #define _PAGE_WRITE		(_ULCAST_(1) << _PAGE_WRITE_SHIFT)
 #define _PAGE_ACCESSED		(_ULCAST_(1) << _PAGE_ACCESSED_SHIFT)
 #define _PAGE_MODIFIED		(_ULCAST_(1) << _PAGE_MODIFIED_SHIFT)

arch/loongarch/include/asm/pgtable.h

@@ -213,7 +213,7 @@ static inline int pmd_bad(pmd_t pmd)
 static inline int pmd_present(pmd_t pmd)
 {
 	if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
-		return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE));
+		return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PRESENT_INVALID));
 
 	return pmd_val(pmd) != (unsigned long)invalid_pte_table;
 }
@@ -558,6 +558,7 @@ static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
 
 static inline pmd_t pmd_mkinvalid(pmd_t pmd)
 {
+	pmd_val(pmd) |= _PAGE_PRESENT_INVALID;
 	pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY | _PAGE_PROTNONE);
 
 	return pmd;

arch/loongarch/kernel/hw_breakpoint.c

@@ -396,6 +396,8 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
 
 	if (hw->ctrl.type != LOONGARCH_BREAKPOINT_EXECUTE)
 		alignment_mask = 0x7;
+	else
+		alignment_mask = 0x3;
 	offset = hw->address & alignment_mask;
 
 	hw->address &= ~alignment_mask;

arch/loongarch/kernel/perf_event.c

@@ -271,7 +271,7 @@ static void loongarch_pmu_enable_event(struct hw_perf_event *evt, int idx)
 	WARN_ON(idx < 0 || idx >= loongarch_pmu.num_counters);
 
 	/* Make sure interrupt enabled. */
-	cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
+	cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base) |
 		(evt->config_base & M_PERFCTL_CONFIG_MASK) | CSR_PERFCTRL_IE;
 
 	cpu = (event->cpu >= 0) ? event->cpu : smp_processor_id();
@@ -594,7 +594,7 @@ static struct pmu pmu = {
 
 static unsigned int loongarch_pmu_perf_event_encode(const struct loongarch_perf_event *pev)
 {
-	return (pev->event_id & 0xff);
+	return M_PERFCTL_EVENT(pev->event_id);
 }
 
 static const struct loongarch_perf_event *loongarch_pmu_map_general_event(int idx)
@@ -849,7 +849,7 @@ static void resume_local_counters(void)
 
 static const struct loongarch_perf_event *loongarch_pmu_map_raw_event(u64 config)
 {
-	raw_event.event_id = config & 0xff;
+	raw_event.event_id = M_PERFCTL_EVENT(config);
 
 	return &raw_event;
 }

arch/loongarch/kernel/unaligned.c

@@ -485,7 +485,7 @@ static int __init debugfs_unaligned(void)
 	struct dentry *d;
 
 	d = debugfs_create_dir("loongarch", NULL);
-	if (!d)
+	if (IS_ERR_OR_NULL(d))
 		return -ENOMEM;
 
 	debugfs_create_u32("unaligned_instructions_user",