From d88671efdfd08f5fcb33b4c4099d79eb82978c62 Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@cs.berkeley.edu>
Date: Tue, 12 Jul 2016 11:10:26 -0700
Subject: Remove uarch counters

We'll re-add support for the generic performance counter facility once
it exists.
---
 pk/handlers.c | 7 -------
 1 file changed, 7 deletions(-)

(limited to 'pk/handlers.c')

diff --git a/pk/handlers.c b/pk/handlers.c
index 71466b8..1961852 100644
--- a/pk/handlers.c
+++ b/pk/handlers.c
@@ -14,13 +14,6 @@ static void handle_illegal_instruction(trapframe_t* tf)
   else
     kassert(len == 2);
 
-  // supply 0 for unimplemented uarch counters
-  if ((tf->insn & (MASK_CSRRS | 0xcc0U<<20)) == (MATCH_CSRRS | 0xcc0U<<20)) {
-    tf->gpr[(tf->insn >> 7) & 0x1f] = 0;
-    tf->epc += 4;
-    return;
-  }
-
   dump_tf(tf);
   panic("An illegal instruction was executed!");
 }
-- 
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