This will be useful when invoking hypercall that targets specific
vcpu(s).
Signed-off-by: Wei Liu <li...@microsoft.com>
Reviewed-by: Paul Durrant <p...@xen.org>
---
v4:
1. Use private.h
2. Add Paul's review tag
v2:
1. Fold into setup_pcpu_arg function
---
xen/arch/x86/guest/hyperv/hyperv.c | 5 +++++
xen/arch/x86/guest/hyperv/private.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/xen/arch/x86/guest/hyperv/hyperv.c
b/xen/arch/x86/guest/hyperv/hyperv.c
index c5195af948..085e646dc6 100644
--- a/xen/arch/x86/guest/hyperv/hyperv.c
+++ b/xen/arch/x86/guest/hyperv/hyperv.c
@@ -31,6 +31,7 @@
struct ms_hyperv_info __read_mostly ms_hyperv;
DEFINE_PER_CPU_READ_MOSTLY(void *, hv_pcpu_input_arg);
+DEFINE_PER_CPU_READ_MOSTLY(unsigned int, hv_vp_index);
static uint64_t generate_guest_id(void)
{
@@ -125,6 +126,7 @@ static void __init setup_hypercall_page(void)
static void setup_hypercall_pcpu_arg(void)
{
void *mapping;
+ uint64_t vp_index_msr;
if ( this_cpu(hv_pcpu_input_arg) )
return;
@@ -135,6 +137,9 @@ static void setup_hypercall_pcpu_arg(void)
smp_processor_id());
this_cpu(hv_pcpu_input_arg) = mapping;
+
+ rdmsrl(HV_X64_MSR_VP_INDEX, vp_index_msr);
+ this_cpu(hv_vp_index) = vp_index_msr;
}
static void __init setup(void)
diff --git a/xen/arch/x86/guest/hyperv/private.h
b/xen/arch/x86/guest/hyperv/private.h
index b6902b5639..da70990401 100644
--- a/xen/arch/x86/guest/hyperv/private.h
+++ b/xen/arch/x86/guest/hyperv/private.h
@@ -25,5 +25,6 @@
#include <xen/percpu.h>
DECLARE_PER_CPU(void *, hv_pcpu_input_arg);
+DECLARE_PER_CPU(unsigned int, hv_vp_index);
#endif /* __XEN_HYPERV_PRIVIATE_H__ */
--
2.20.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
