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author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2022-01-31 13:19:33 -0500 |
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committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2022-01-31 13:19:33 -0500 |
commit | 063565aca3734de4e73639a0e460a58d9418b3cd (patch) | |
tree | fb2455b984f584a819defe6e5fe512a4b6fc33ae /arch/powerpc/mm/nohash/book3e_pgtable.c | |
parent | drm/i915: Move drrs hardware bit frobbing to small helpers (diff) | |
parent | Linux 5.17-rc2 (diff) | |
download | linux-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.c | 15 |
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); +} |