On 08/25/2010 03:27 PM, Jason Wang wrote:
----- "Avi Kivity"<avi@xxxxxxxxxx> wrote:
On 08/25/2010 12:40 PM, Jason Wang wrote:
----- "Avi Kivity"<avi@xxxxxxxxxx> wrote:
On 08/24/2010 04:47 PM, Jason Wang wrote:
TSS size should be 104 byte.
Signed-off-by: Jason Wang<jasowang@xxxxxxxxxx>
---
x86/cstart64.S | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/x86/cstart64.S b/x86/cstart64.S
index 5d358ad..b871153 100644
--- a/x86/cstart64.S
+++ b/x86/cstart64.S
@@ -69,7 +69,7 @@ tss:
.long 0
.quad ring0stacktop - i * 4096
ring 0 stack
.quad 0, 0, 0
rings 1, 2, 3 stack
Hello avi:
Rechek with the manual, there's no filed of RSP3. So this patch may
make sense.
That is true. But please redo it to remove one 0 from the line above,
not from the IST.
But unfortunately it breaks 64bit vmexit test. Triple
fault happens in setup_args(). Any suggestions or is there any thing
I
missed?
No idea. Can you post an ftrace of the crash?
The trace before triple fault:
......
qemu-kvm-8101 [002] 243.138507: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138508: kvm_exit: reason IO_INSTRUCTION rip 0x400e5f
qemu-kvm-8101 [002] 243.138508: kvm_pio: pio_read at 0x510 size 2 count 1
qemu-kvm-8101 [002] 243.138512: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138513: kvm_exit: reason IO_INSTRUCTION rip 0x400e71
qemu-kvm-8101 [002] 243.138514: kvm_emulate_insn: 0:400e71: ec (prot64)
qemu-kvm-8101 [002] 243.138515: kvm_pio: pio_write at 0x511 size 1 count 1
qemu-kvm-8101 [002] 243.138519: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138520: kvm_exit: reason IO_INSTRUCTION rip 0x400e71
qemu-kvm-8101 [002] 243.138521: kvm_emulate_insn: 0:400e71: ec (prot64)
qemu-kvm-8101 [002] 243.138521: kvm_pio: pio_write at 0x511 size 1 count 1
qemu-kvm-8101 [002] 243.138525: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138526: kvm_exit: reason CPUID rip 0x400ff7
qemu-kvm-8101 [002] 243.138526: kvm_cpuid: func 1 rax 6d3 rbx 800 rcx 80002001 rdx 78bfbfd
qemu-kvm-8101 [002] 243.138527: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138528: kvm_exit: reason EXCEPTION_NMI rip 0x400271
qemu-kvm-8101 [002] 243.138528: kvm_page_fault: address 40f3a0 error_code b
qemu-kvm-8101 [002] 243.138530: kvm_entry: vcpu 0
qemu-kvm-8101 [002] 243.138531: kvm_exit: reason TRIPLE_FAULT rip 0x400c15
What's the corresponding disassembly?
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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