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authorRodrigo Vivi <rodrigo.vivi@intel.com>2022-01-31 13:19:33 -0500
committerRodrigo Vivi <rodrigo.vivi@intel.com>2022-01-31 13:19:33 -0500
commit063565aca3734de4e73639a0e460a58d9418b3cd (patch)
treefb2455b984f584a819defe6e5fe512a4b6fc33ae /arch/powerpc/mm/nohash/book3e_pgtable.c
parentdrm/i915: Move drrs hardware bit frobbing to small helpers (diff)
parentLinux 5.17-rc2 (diff)
downloadlinux-dev-063565aca3734de4e73639a0e460a58d9418b3cd.tar.xz
linux-dev-063565aca3734de4e73639a0e460a58d9418b3cd.zip
Merge drm/drm-next into drm-intel-next
Catch-up with 5.17-rc2 and trying to align with drm-intel-gt-next for a possible topic branch for merging the split of i915_regs... Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'arch/powerpc/mm/nohash/book3e_pgtable.c')
-rw-r--r--arch/powerpc/mm/nohash/book3e_pgtable.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/mm/nohash/book3e_pgtable.c b/arch/powerpc/mm/nohash/book3e_pgtable.c
index 77884e24281d..7d4368d055a6 100644
--- a/arch/powerpc/mm/nohash/book3e_pgtable.c
+++ b/arch/powerpc/mm/nohash/book3e_pgtable.c
@@ -10,6 +10,7 @@
#include <asm/pgalloc.h>
#include <asm/tlb.h>
#include <asm/dma.h>
+#include <asm/code-patching.h>
#include <mm/mmu_decl.h>
@@ -115,3 +116,17 @@ int __ref map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot)
smp_wmb();
return 0;
}
+
+void __patch_exception(int exc, unsigned long addr)
+{
+ unsigned int *ibase = &interrupt_base_book3e;
+
+ /*
+ * Our exceptions vectors start with a NOP and -then- a branch
+ * to deal with single stepping from userspace which stops on
+ * the second instruction. Thus we need to patch the second
+ * instruction of the exception, not the first one.
+ */
+
+ patch_branch(ibase + (exc / 4) + 1, addr, 0);
+}