Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 6d0795d..c1a8aac 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -33,11 +33,7 @@
#include <asm/feature-fixups.h>
/* PACA save area size in u64 units (exgen, exmc, etc) */
-#if defined(CONFIG_RELOCATABLE)
#define EX_SIZE 10
-#else
-#define EX_SIZE 9
-#endif
/*
* maximum recursive depth of MCE exceptions
@@ -67,6 +63,12 @@
nop; \
nop;
+#define SCV_ENTRY_FLUSH_SLOT \
+ SCV_ENTRY_FLUSH_FIXUP_SECTION; \
+ nop; \
+ nop; \
+ nop;
+
/*
* r10 must be free to use, r13 must be paca
*/
@@ -75,10 +77,25 @@
ENTRY_FLUSH_SLOT
/*
+ * r10, ctr must be free to use, r13 must be paca
+ */
+#define SCV_INTERRUPT_TO_KERNEL \
+ STF_ENTRY_BARRIER_SLOT; \
+ SCV_ENTRY_FLUSH_SLOT
+
+/*
* Macros for annotating the expected destination of (h)rfid
*
* The nop instructions allow us to insert one or more instructions to flush the
* L1-D cache when returning to userspace or a guest.
+ *
+ * powerpc relies on return from interrupt/syscall being context synchronising
+ * (which hrfid, rfid, and rfscv are) to support ARCH_HAS_MEMBARRIER_SYNC_CORE
+ * without additional synchronisation instructions.
+ *
+ * soft-masked interrupt replay does not include a context-synchronising rfid,
+ * but those always return to kernel, the sync is only required when returning
+ * to user.
*/
#define RFI_FLUSH_SLOT \
RFI_FLUSH_FIXUP_SECTION; \
@@ -134,6 +151,12 @@
hrfid; \
b hrfi_flush_fallback
+#define RFSCV_TO_USER \
+ STF_EXIT_BARRIER_SLOT; \
+ RFI_FLUSH_SLOT; \
+ RFSCV; \
+ b rfscv_flush_fallback
+
#else /* __ASSEMBLY__ */
/* Prototype for function defined in exceptions-64s.S */
void do_uaccess_flush(void);