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hw/intc/arm_gic: reserved register addresses are RAZ/WI 

The GICv2 specification says that reserved register addresses
must RAZ/WI; now that we implement external abort handling
for Arm CPUs this means we must return MEMTX_OK rather than
MEMTX_ERROR, to avoid generating a spurious guest data abort.

Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1513183941-24300-3-git-send-email-peter.maydell@linaro.org
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
This commit is contained in:
Peter Maydell 2018-01-11 13:25:40 +00:00
parent f1945632b4
commit 0cf0985201
1 changed files with 3 additions and 2 deletions
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5
hw/intc/arm_gic.c
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@ -1261,7 +1261,8 @@ static MemTxResult gic_cpu_read(GICState *s, int cpu, int offset,
default:
qemu_log_mask(LOG_GUEST_ERROR,
"gic_cpu_read: Bad offset %x\n", (int)offset);
return MEMTX_ERROR;
*data = 0;
break;
}
return MEMTX_OK;
}
@ -1329,7 +1330,7 @@ static MemTxResult gic_cpu_write(GICState *s, int cpu, int offset,
default:
qemu_log_mask(LOG_GUEST_ERROR,
"gic_cpu_write: Bad offset %x\n", (int)offset);
return MEMTX_ERROR;
return MEMTX_OK;
}
gic_update(s);
return MEMTX_OK;