[Xen-devel] [patch 1/1] hypervisor: Enable hypervisor detect pvhvm running on COMPAT mode

[Joe Jin <joe.jin@xxxxxxxxxx>]

Hi,

When 32bit pvhvm running on 64bit hypervisor, if guest OS create 
event-channel more than 32, Domain0 maybe could not communication
with guest OS via new event-channel, also xenwatch thread state
is TASK_UNINTERRUPTIBLE and could not got schedule, all inter-domain
command almost no response.

How to reproduce:
    Try to with "xm block-attach" attach more disk to the pvhvm
    guest, the issue will appear.

This caused by hypervisor could not probe and decide if pvhvm guest
running in COMPAT mode, and could set the right bits for guest os.

Please review, thanks.

Signed-off-by: Joe Jin <joe.jin@xxxxxxxxxx>
---

 domain.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -r 98d48f7680db xen/include/asm-x86/domain.h
--- a/xen/include/asm-x86/domain.h      Wed Nov 19 19:13:22 2008 +0000
+++ b/xen/include/asm-x86/domain.h      Tue Mar 03 14:35:19 2009 +0800
@@ -16,7 +16,7 @@
 #define is_pv_32on64_domain(d) (0)
 #endif
 #define is_pv_32on64_vcpu(v)   (is_pv_32on64_domain((v)->domain))
-#define IS_COMPAT(d)           (is_pv_32on64_domain(d))
+#define IS_COMPAT(d)           (is_pv_32on64_domain(d) || has_32bit_shinfo(d))
 
 struct trap_bounce {
     uint32_t      error_code;



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