Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Avoid writing an uninitialised stack variable to POR_EL0 on sigreturn
   if the poe_context record is absent

 - Reserve one more page for the early 4K-page kernel mapping to cover
   the extra [_text, _stext) split introduced by the non-executable
   read-only mapping

 - Force the arch_local_irq_*() wrappers to be __always_inline so that
   noinstr entry and idle paths cannot call out-of-line, instrumentable
   copies

 - Fix potential sign extension in the arm64 SCS unwinder's DWARF
   advance_loc4 decoding

 - Tolerate arm64 ACPI platforms with only WFI and no deeper PSCI idle
   states, restoring cpuidle registration on such systems

 - Include the UAPI <asm/ptrace.h> header in the arm64 GCS libc test
   rather than carrying a duplicate struct user_gcs definition (the
   original #ifdef NT_ARM_GCS was wrong to cover the structure
   definition as it would be masked out if the toolchain defined it)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: signal: Preserve POR_EL0 if poe_context is missing
  arm64: Reserve an extra page for early kernel mapping
  kselftest/arm64: Include <asm/ptrace.h> for user_gcs definition
  ACPI: arm64: cpuidle: Tolerate platforms with no deep PSCI idle states
  arm64/irqflags: __always_inline the arch_local_irq_*() helpers
  arm64/scs: Fix potential sign extension issue of advance_loc4

2 files changed, 13 insertions, 8 deletions

diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
index d4d7451c2c12..a8cb5a5c93b7 100644
--- a/arch/arm64/include/asm/irqflags.h
+++ b/arch/arm64/include/asm/irqflags.h
@@ -40,7 +40,7 @@ static __always_inline void __pmr_local_irq_enable(void)
 	barrier();
 }
 
-static inline void arch_local_irq_enable(void)
+static __always_inline void arch_local_irq_enable(void)
 {
 	if (system_uses_irq_prio_masking()) {
 		__pmr_local_irq_enable();
@@ -68,7 +68,7 @@ static __always_inline void __pmr_local_irq_disable(void)
 	barrier();
 }
 
-static inline void arch_local_irq_disable(void)
+static __always_inline void arch_local_irq_disable(void)
 {
 	if (system_uses_irq_prio_masking()) {
 		__pmr_local_irq_disable();
@@ -90,7 +90,7 @@ static __always_inline unsigned long __pmr_local_save_flags(void)
 /*
  * Save the current interrupt enable state.
  */
-static inline unsigned long arch_local_save_flags(void)
+static __always_inline unsigned long arch_local_save_flags(void)
 {
 	if (system_uses_irq_prio_masking()) {
 		return __pmr_local_save_flags();
@@ -109,7 +109,7 @@ static __always_inline bool __pmr_irqs_disabled_flags(unsigned long flags)
 	return flags != GIC_PRIO_IRQON;
 }
 
-static inline bool arch_irqs_disabled_flags(unsigned long flags)
+static __always_inline bool arch_irqs_disabled_flags(unsigned long flags)
 {
 	if (system_uses_irq_prio_masking()) {
 		return __pmr_irqs_disabled_flags(flags);
@@ -128,7 +128,7 @@ static __always_inline bool __pmr_irqs_disabled(void)
 	return __pmr_irqs_disabled_flags(__pmr_local_save_flags());
 }
 
-static inline bool arch_irqs_disabled(void)
+static __always_inline bool arch_irqs_disabled(void)
 {
 	if (system_uses_irq_prio_masking()) {
 		return __pmr_irqs_disabled();
@@ -160,7 +160,7 @@ static __always_inline unsigned long __pmr_local_irq_save(void)
 	return flags;
 }
 
-static inline unsigned long arch_local_irq_save(void)
+static __always_inline unsigned long arch_local_irq_save(void)
 {
 	if (system_uses_irq_prio_masking()) {
 		return __pmr_local_irq_save();
@@ -187,7 +187,7 @@ static __always_inline void __pmr_local_irq_restore(unsigned long flags)
 /*
  * restore saved IRQ state
  */
-static inline void arch_local_irq_restore(unsigned long flags)
+static __always_inline void arch_local_irq_restore(unsigned long flags)
 {
 	if (system_uses_irq_prio_masking()) {
 		__pmr_local_irq_restore(flags);
diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index 74a4f738c5f5..229ee7976f69 100644
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -68,7 +68,12 @@
 #define KERNEL_SEGMENT_COUNT	5
 
 #if SWAPPER_BLOCK_SIZE > SEGMENT_ALIGN
-#define EARLY_SEGMENT_EXTRA_PAGES (KERNEL_SEGMENT_COUNT + 1)
+/*
+ * KERNEL_SEGMENT_COUNT counts the permanent kernel VMAs. The early mapping
+ * has one additional split, [_text, _stext). Reserve one more page for the
+ * SWAPPER_BLOCK_SIZE-unaligned boundaries.
+ */
+#define EARLY_SEGMENT_EXTRA_PAGES (KERNEL_SEGMENT_COUNT + 2)
 /*
  * The initial ID map consists of the kernel image, mapped as two separate
  * segments, and may appear misaligned wrt the swapper block size. This means