[Xen-devel] [PATCH 0/4] Fix tools/xen-mceinj to handle >=4GB guest memory

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

The existing xen-mceinj can not inject MCE through MSR_MCI_ADDR to a
domain w/ more than 4GB memory, e.g. if domain 0 has more than 4GB
memory, the execution of the command
        xen-mceinj -d 0 -t 0 -p 0x2721a900
will fail w/ a message "Failed to get pfn list ffffffff: Operation not
supported".

The cause is that the hypercall XEN_DOMCTL_getmemlist used by
xen-mceinj to translate the guest physical address (argument of '-p')
to the host machine address always fails if the domain has more than
4GB memory due to the mitigation of XSA-74.

This patchset fixes this problem by moving the translation from
xen-mceinj to the hypervisor, so that it is not necessary to use
XEN_DOMCTL_getmemlist.

The first two patches just fix serval code-style issues, while the
other two are the actual fix.

Haozhong Zhang (4):
  x86/mce: Fix code style
  tools/mceinject: Fix code style
  x86/mce: Translate passed-in GPA to host machine address
  tools/xen-mceinj: Pass in GPA when injecting through MSR_MCI_ADDR

 tools/tests/mce-test/tools/xen-mceinj.c | 141 +++++---------------------------
 xen/arch/x86/cpu/mcheck/mce.c           |  43 ++++++++--
 xen/include/public/arch-x86/xen-mca.h   |  31 +++----
 3 files changed, 77 insertions(+), 138 deletions(-)

--
2.4.8


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel