On 30.05.2014 14:47, Alexander Graf wrote:
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
Hi Alex,
Unfortunately, the KVM modul doesn't compile with DEBUG_MMU.
Kernel 3.14.4:
make modules
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
AS [M] arch/powerpc/kvm/fpu.o
CC [M] arch/powerpc/kvm/book3s_paired_singles.o
CC [M] arch/powerpc/kvm/book3s_pr.o
CC [M] arch/powerpc/kvm/book3s_pr_papr.o
CC [M] arch/powerpc/kvm/book3s_emulate.o
AS [M] arch/powerpc/kvm/book3s_interrupts.o
CC [M] arch/powerpc/kvm/book3s_mmu_hpte.o
CC [M] arch/powerpc/kvm/book3s_64_mmu_host.o
CC [M] arch/powerpc/kvm/book3s_64_mmu.o
CC [M] arch/powerpc/kvm/book3s_32_mmu.o
arch/powerpc/kvm/book3s_32_mmu.c: In function
‘kvmppc_mmu_book3s_32_get_pteg’:
arch/powerpc/kvm/book3s_32_mmu.c:133:2: error: ‘struct
kvmppc_vcpu_book3s’ has no member named ‘vcpu’
make[1]: *** [arch/powerpc/kvm/book3s_32_mmu.o] Fehler 1
make: *** [arch/powerpc/kvm] Fehler 2
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?
My PPC32 host (Sam440ep-Flex 733MHz) is too slow for MOL.
Rgds,
Christian
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