On 30.05.14 14:42, Christian Zigotzky wrote:
Am 30.05.14 14:21, schrieb Alexander Graf:
On 30.05.14 13:39, Christian Zigotzky wrote:
Hi Alex,
Thank you for your answer. Here are the traces:
http://www.xenosoft.de/trace_mol_mac_os_x_tiger.txt.tar.gz
http://www.xenosoft.de/trace_mol_mac_os_x_jaguar.txt.tar.gz
Looking at the Jaguar log, the guest seems to be stuck trying to map
a page:
mol-4087 [001] .... 252.368002: kvm_exit:
exit=DATA_STORAGE | pc=0x900074c4 | msr=0x4000d030 | dar=0xa000a434 |
srr1=0x100000000000d032 | last_inst=0x912b0
000
If you look at the trace, you will see that this PC with the exact
same DAR happens over and over again - every time the guest thinks
it's mapped the page.
I don't know why that's happening. Try to enable the debug prints (or
convert them to trace points ;)) in the book3s_32 guest and book3s_64
host emulation. Maybe that tells us something.
Alex
Thanks Alex for your effort. How can I enable the debug prints?
This should do the trick. Output will be in dmesg:
diff --git a/arch/powerpc/kvm/book3s_32_mmu.c
b/arch/powerpc/kvm/book3s_32_mmu.c
index 93503bb..939b14f 100644
--- a/arch/powerpc/kvm/book3s_32_mmu.c
+++ b/arch/powerpc/kvm/book3s_32_mmu.c
@@ -27,8 +27,8 @@
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
-/* #define DEBUG_MMU */
-/* #define DEBUG_MMU_PTE */
+#define DEBUG_MMU
+#define DEBUG_MMU_PTE
/* #define DEBUG_MMU_PTE_IP 0xfff14c40 */
#ifdef DEBUG_MMU
There's also always the chance that split real mode is the real culprit
for breakage here. Have you verified that the same kernel source (KVM
code) works on a PPC32 host with MOL?
Alex
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