From 1cc96be1c7445ce141c661293572ab4350bf1b07 Mon Sep 17 00:00:00 2001
From: Pekka Enberg <penberg@cs.helsinki.fi>
Date: Sun, 11 Apr 2010 15:15:02 +0300
Subject: [PATCH] kvm: Ignore MMIO accesses

Lets cheat some more and ignore MMIO accesses altogether.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---
 tools/kvm/Makefile          |  3 ++-
 tools/kvm/include/kvm/kvm.h |  1 +
 tools/kvm/main.c            | 14 ++++++++++++++
 tools/kvm/mmio.c            | 19 +++++++++++++++++++
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 tools/kvm/mmio.c

diff --git a/tools/kvm/Makefile b/tools/kvm/Makefile
index bc1290d1336c..1846f3c4f7e7 100644
--- a/tools/kvm/Makefile
+++ b/tools/kvm/Makefile
@@ -14,9 +14,10 @@ OBJS	+= interrupt.o
 OBJS	+= ioport.o
 OBJS	+= kvm.o
 OBJS	+= main.o
+OBJS	+= mmio.o
 OBJS	+= util.o
-OBJS	+= bios/c-intfake.o
 OBJS	+= bios/c-int10.o
+OBJS	+= bios/c-intfake.o
 
 CFLAGS	+= $(CPPFLAGS) -Iinclude -g
 
diff --git a/tools/kvm/include/kvm/kvm.h b/tools/kvm/include/kvm/kvm.h
index 61100151de37..2d39b6211c0b 100644
--- a/tools/kvm/include/kvm/kvm.h
+++ b/tools/kvm/include/kvm/kvm.h
@@ -39,6 +39,7 @@ bool kvm__load_kernel(struct kvm *kvm, const char *kernel_filename, const char *
 void kvm__reset_vcpu(struct kvm *self);
 void kvm__run(struct kvm *self);
 bool kvm__emulate_io(struct kvm *self, uint16_t port, void *data, int direction, int size, uint32_t count);
+bool kvm__emulate_mmio(struct kvm *self, uint64_t phys_addr, uint8_t *data, uint32_t len, uint8_t is_write);
 
 /*
  * Debugging
diff --git a/tools/kvm/main.c b/tools/kvm/main.c
index 5e72cf5f7816..b6414e77f474 100644
--- a/tools/kvm/main.c
+++ b/tools/kvm/main.c
@@ -80,6 +80,20 @@ int main(int argc, char *argv[])
 				goto exit_kvm;
 			break;
 		}
+		case KVM_EXIT_MMIO: {
+			bool ret;
+
+			ret = kvm__emulate_mmio(kvm,
+					kvm->kvm_run->mmio.phys_addr,
+					kvm->kvm_run->mmio.data,
+					kvm->kvm_run->mmio.len,
+					kvm->kvm_run->mmio.is_write);
+
+			if (!ret)
+				goto exit_kvm;
+			break;
+
+		}
 		default:
 			goto exit_kvm;
 		}
diff --git a/tools/kvm/mmio.c b/tools/kvm/mmio.c
new file mode 100644
index 000000000000..095d2c9d919a
--- /dev/null
+++ b/tools/kvm/mmio.c
@@ -0,0 +1,19 @@
+#include "kvm/kvm.h"
+
+#include <stdio.h>
+
+static const char *to_direction(uint8_t is_write)
+{
+	if (is_write)
+		return "write";
+
+	return "read";
+}
+
+bool kvm__emulate_mmio(struct kvm *self, uint64_t phys_addr, uint8_t *data, uint32_t len, uint8_t is_write)
+{
+	fprintf(stderr, "Warning: Ignoring MMIO %s at %016" PRIx64 " (length %" PRIu32 ")\n",
+		to_direction(is_write), phys_addr, len);
+
+	return true;
+}
-- 
2.39.5