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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-28 22:22:40 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-28 22:22:40 +0200 |
| commit | 7a30bdd99f37352b188575b27924c407c6ddff9e (patch) | |
| tree | 10ea40ab1b5211e75c33eaddb3a6b393ad6ee7ad /arch/arc/mm/tlbex.S | |
| parent | f36cf386e3fec258a341d446915862eded3e13d8 (diff) | |
| parent | 609488bc979f99f805f34e9a32c1e3b71179d10b (diff) | |
| download | talos-op-linux-7a30bdd99f37352b188575b27924c407c6ddff9e.tar.gz talos-op-linux-7a30bdd99f37352b188575b27924c407c6ddff9e.zip | |
Merge branch master from git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Pick up the spectre documentation so the Grand Schemozzle can be added.
Diffstat (limited to 'arch/arc/mm/tlbex.S')
| -rw-r--r-- | arch/arc/mm/tlbex.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index 471a97bf492d..c55d95dd2f39 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -393,6 +393,17 @@ EV_TLBMissD_fast_ret: ; additional label for VDK OS-kit instrumentation ;-------- Common routine to call Linux Page Fault Handler ----------- do_slow_path_pf: +#ifdef CONFIG_ISA_ARCV2 + ; Set Z flag if exception in U mode. Hardware micro-ops do this on any + ; taken interrupt/exception, and thus is already the case at the entry + ; above, but ensuing code would have already clobbered. + ; EXCEPTION_PROLOGUE called in slow path, relies on correct Z flag set + + lr r2, [erstatus] + and r2, r2, STATUS_U_MASK + bxor.f 0, r2, STATUS_U_BIT +#endif + ; Restore the 4-scratch regs saved by fast path miss handler TLBMISS_RESTORE_REGS |
