于 2012年11月20日 08:32, Marcelo Tosatti 写道:
On Fri, Nov 16, 2012 at 06:12:58PM +0800, zhangyanfei wrote:
Hello Marcelo,
Any thoughts?
I thought a function call was OK, but its better to have all code in
vmx.c. Please have an atomic notifier in kexec.c (registered by KVM
module via
Hello Marcelo,
Any thoughts?
于 2012年11月14日 17:29, zhangyanfei 写道:
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors
may
be corrupted. But, sometimes, we need the VMCSs to debug guest
于 2012年11月14日 05:22, Marcelo Tosatti 写道:
On Thu, Nov 01, 2012 at 01:55:04PM +0800, zhangyanfei wrote:
于 2012年10月31日 17:01, Hatayama, Daisuke 写道:
-Original Message-
From: kexec-boun...@lists.infradead.org
[mailto:kexec-boun...@lists.infradead.org] On Behalf Of zhangyanfei
Sent
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors may
be corrupted. But, sometimes, we need the VMCSs to debug guest images contained
in the host vmcore. To prevent the corruption, we should
crash_clear_loaded_vmcss is added to VMCLEAR vmcss loaded on all
cpus. And when loading kvm_intel module, the function pointer will be
made valid.
The percpu variable vmclear_skipped is added to flag the case that
if loaded_vmcss_on_cpu list is being modified while the machine crashes
and doing
Signed-off-by: Zhang Yanfei zhangyan...@cn.fujitsu.com
---
arch/x86/kvm/vmx.c | 32
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4ff0ab9..029ec7b 100644
--- a/arch/x86/kvm/vmx.c
+++
Hello Marcelo,
Do you have any comments about this version?
Thanks
Zhang
于 2012年10月31日 11:30, zhangyanfei 写道:
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors
may
be corrupted
于 2012年10月31日 17:01, Hatayama, Daisuke 写道:
-Original Message-
From: kexec-boun...@lists.infradead.org
[mailto:kexec-boun...@lists.infradead.org] On Behalf Of zhangyanfei
Sent: Wednesday, October 31, 2012 12:34 PM
To: x...@kernel.org; kexec@lists.infradead.org; Avi Kivity; Marcelo
-corrupted.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel/crash.c | 27 +++
2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors may
be corrupted. But, sometimes, we need the VMCSs to debug guest images contained
in the host vmcore. To prevent the corruption, we should
This patch provides a way to VMCLEAR vmcss related to guests
on all cpus before executing the VMXOFF when doing kdump. This
is used to ensure the VMCSs in the vmcore updated and
non-corrupted.
Signed-off-by: Zhang Yanfei zhangyan...@cn.fujitsu.com
---
arch/x86/include/asm/kexec.h |2 ++
Signed-off-by: Zhang Yanfei zhangyan...@cn.fujitsu.com
---
arch/x86/kvm/vmx.c |9 +
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4ff0ab9..f6a16b2 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -41,6 +41,7 @@
doing kdump. This is used to ensure the VMCSs in the
vmcore updated and non-corrupted.
Changelog from v1 to v2:
1. remove the sysctl and clear VMCSs unconditionally.
zhangyanfei (2):
x86/kexec: VMCLEAR vmcss on all cpus if necessary
KVM: make crash_clear_loaded_vmcss valid when loading
/vmcsinfo: shows physical address of VMCSINFO note information.
/sys/kernel/vmcsinfo_maxsize: shows max size of VMCSINFO.
4. A new Documentation/ABI entry is added for vmcsinfo and vmcsinfo_maxsize.
5. Do not update VMCSINFO note when the kernel is panicked.
zhangyanfei (5):
x86: Add helper
This patch provides a set of variables to hold the VMCSINFO and also
some helper functions to help fill the VMCSINFO.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
arch/x86/include/asm/vmcsinfo.h | 34 +
arch/x86/kernel/Makefile|2 +
arch/x86/kernel
A new module named vmcsinfo-intel is used to fill VMCSINFO. And
this module depends on kvm-intel and kvm module. So we should
export some symbols of kvm-intel and kvm module that are needed
by vmcsinfo-intel.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
arch/x86/include/asm/vmx.h
Software Developer’s Manual, Volume
3C) but not defined in *vmcs_field*.
2. fields don't exist because their corresponding control bits
are not set.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
arch/x86/kvm/Kconfig| 11 ++
arch/x86/kvm/Makefile |3 +
arch/x86/kvm
/sys/kernel/vmcsinfo_maxsize shows the max size of VMCSINFO.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
kernel/ksysfs.c | 29 +
1 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 4e316e1..8a27ece 100644
We create two new sysfs files, vmcsinfo and vmcsinfo_maxsize. And
here we add an Documentation/ABI entry for them.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
Documentation/ABI/testing/sysfs-kernel-vmcsinfo | 16
1 files changed, 16 insertions(+), 0 deletions
于 2012年04月17日 18:59, Avi Kivity 写道:
On 04/17/2012 01:51 PM, zhangyanfei wrote:
于 2012年04月17日 15:44, Avi Kivity 写道:
On 04/11/2012 04:39 AM, zhangyanfei wrote:
This patch set exports offsets of VMCS fields as note information for
kdump. We call it VMCSINFO. The purpose of VMCSINFO
于 2012年04月17日 15:44, Avi Kivity 写道:
On 04/11/2012 04:39 AM, zhangyanfei wrote:
This patch set exports offsets of VMCS fields as note information for
kdump. We call it VMCSINFO. The purpose of VMCSINFO is to retrieve
runtime state of guest machine image, such as registers, in host
machine's
于 2012年04月11日 16:56, Avi Kivity 写道:
On 04/11/2012 04:39 AM, zhangyanfei wrote:
This patch set exports offsets of VMCS fields as note information for
kdump. We call it VMCSINFO. The purpose of VMCSINFO is to retrieve
runtime state of guest machine image, such as registers, in host
machine's
于 2012年04月11日 16:48, Avi Kivity 写道:
On 04/11/2012 04:50 AM, zhangyanfei wrote:
This patch is to implement the feature that at initialization of
kvm_intel module, fills VMCSINFO with a VMCS revision identifier,
and encoded offsets of VMCS fields. The reason why we put the
VMCSINFO processing
control bits
are not set.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
arch/x86/kvm/vmx.c | 350
1 files changed, 350 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index ad85adf..e98fafa
VMCS region of each guest vcpu and VMCSINFO into qemu-process
core file. To do this, we will modify kernel core dumper, gdb gcore
and crash gcore.
3. Dump guest image from the qemu-process core file into a vmcore.
zhangyanfei (4):
x86: Add helper variables and functions to hold
This patch creates sysfs file to export where VMCSINFO is allocated,
as below:
$ cat /sys/kernel/vmcsinfo
1cb88a0 2000
number on the left-hand side is the physical address of VMCSINFO,
while the one on the right-hand side is the max size of VMCSINFO.
Signed-off-by: zhangyanfei
crash_save_vmcsinfo updates the VMCSINFO when kernel crashes.
If no VMCSINFO has been saved before, this function will do nothing.
Signed-off-by: zhangyanfei zhangyan...@cn.fujitsu.com
---
include/linux/kexec.h |1 +
kernel/kexec.c| 14 ++
2 files changed, 15 insertions
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