[Qemu-devel] TCG - Allow bit 15 to 1 for slbmfee and slbmfev

[Ivan Warren]

All,

Submitting proposal :

Per Power ISA 3.02B Book III at pages 1029 and 1030, bit 15 of the 
slbmfee and slbmfev instructions is now assigned to an implementation 
specific bit and is no longer reserved - meaning it can be set to 1 but 
can probably be safely ignored.

2.07B still indicates bit 15 is reserved but some non Linux Operating 
system's debugger DO set this bit to 1 (so it was probably valid yet not 
documented for Power 7/8).

Therefore I propose :

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 4a5de28036..85f8b147ba 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -7064,8 +7064,8 @@ GEN_HANDLER2(mtsr_64b, "mtsr", 0x1F, 0x12, 0x06, 
0x0010F801, PPC_SEGMENT_64B),
 GEN_HANDLER2(mtsrin_64b, "mtsrin", 0x1F, 0x12, 0x07, 0x001F0001,
              PPC_SEGMENT_64B),
 GEN_HANDLER2(slbmte, "slbmte", 0x1F, 0x12, 0x0C, 0x001F0001, 
PPC_SEGMENT_64B),
-GEN_HANDLER2(slbmfee, "slbmfee", 0x1F, 0x13, 0x1C, 0x001F0001, 
PPC_SEGMENT_64B),
-GEN_HANDLER2(slbmfev, "slbmfev", 0x1F, 0x13, 0x1A, 0x001F0001, 
PPC_SEGMENT_64B),
+GEN_HANDLER2(slbmfee, "slbmfee", 0x1F, 0x13, 0x1C, 0x001E0001, 
PPC_SEGMENT_64B),
+GEN_HANDLER2(slbmfev, "slbmfev", 0x1F, 0x13, 0x1A, 0x001E0001, 
PPC_SEGMENT_64B),
 GEN_HANDLER2(slbfee_, "slbfee.", 0x1F, 0x13, 0x1E, 0x001F0000, 
PPC_SEGMENT_64B),
 #endif
 GEN_HANDLER(tlbia, 0x1F, 0x12, 0x0B, 0x03FFFC01, PPC_MEM_TLBIA),

PS : This patch is not mine, but gleaned from "Zhuowei Zhang" (no known 
e-mail address). I am just attempting to have it validated.

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