Blame 0023-Revert-memory-Return-1-again-on-reads-from-unsigned-.patch
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From 2a93d3dd32386c3522cfa2ee60c9e06a298d1f52 Mon Sep 17 00:00:00 2001
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From: Jan Kiszka <jan.kiszka@siemens.com>
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Date: Mon, 2 Sep 2013 18:43:31 +0200
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Subject: [PATCH] Revert "memory: Return -1 again on reads from unsigned
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regions"
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This reverts commit 9b8c69243585a32d14b9bb9fcd52c37b0b5a1b71.
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The commit was wrong: We only return -1 on invalid accesses, not on
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valid but unbacked ones. This broke various corner cases.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 68a7439a150d6b4da99082ab454b9328b151bc25)
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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memory.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/memory.c b/memory.c
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index 886f838..5a10fd0 100644
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--- a/memory.c
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+++ b/memory.c
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@@ -872,7 +872,7 @@ static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
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if (current_cpu != NULL) {
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cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
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}
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- return -1ULL;
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+ return 0;
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}
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static void unassigned_mem_write(void *opaque, hwaddr addr,
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