@@ -12,6 +12,7 @@
#define HV_X64_MSR_GUEST_OS_ID 0x40000000
#define HV_X64_MSR_HYPERCALL 0x40000001
+#define HV_X64_MSR_VP_INDEX 0x40000002
#define HV_X64_MSR_TIME_REF_COUNT 0x40000020
#define HV_X64_MSR_REFERENCE_TSC 0x40000021
@@ -12,6 +12,11 @@ enum {
HV_TEST_DEV_EVT_CONN_DESTROY,
};
+static u32 vp_idx(void)
+{
+ return rdmsr(HV_X64_MSR_VP_INDEX);
+}
+
static void synic_ctl(u32 ctl, u32 vcpu_id, u32 sint, u32 conn_id)
{
outl((conn_id << 24) | (ctl << 16) | (vcpu_id << 8) | sint, 0x3000);
@@ -30,7 +35,7 @@ static void sint_disable(u8 sint)
void synic_sint_create(u8 sint, u8 vec, bool auto_eoi)
{
- synic_ctl(HV_TEST_DEV_SINT_ROUTE_CREATE, smp_id(), sint, 0);
+ synic_ctl(HV_TEST_DEV_SINT_ROUTE_CREATE, vp_idx(), sint, 0);
sint_enable(sint, vec, auto_eoi);
}
@@ -42,12 +47,12 @@ void synic_sint_set(u8 vcpu, u8 sint)
void synic_sint_destroy(u8 sint)
{
sint_disable(sint);
- synic_ctl(HV_TEST_DEV_SINT_ROUTE_DESTROY, smp_id(), sint, 0);
+ synic_ctl(HV_TEST_DEV_SINT_ROUTE_DESTROY, vp_idx(), sint, 0);
}
void msg_conn_create(u8 sint, u8 vec, u8 conn_id)
{
- synic_ctl(HV_TEST_DEV_MSG_CONN_CREATE, smp_id(), sint, conn_id);
+ synic_ctl(HV_TEST_DEV_MSG_CONN_CREATE, vp_idx(), sint, conn_id);
sint_enable(sint, vec, true);
}
@@ -59,7 +64,7 @@ void msg_conn_destroy(u8 sint, u8 conn_id)
void evt_conn_create(u8 sint, u8 vec, u8 conn_id)
{
- synic_ctl(HV_TEST_DEV_EVT_CONN_CREATE, smp_id(), sint, conn_id);
+ synic_ctl(HV_TEST_DEV_EVT_CONN_CREATE, vp_idx(), sint, conn_id);
sint_enable(sint, vec, true);
}
Hyper-V SynIC uses Hyper-V-specific processor numbering; each processor can learn its number by reading from a dedicated synthetic MSR. Accidentally it conincides with apic_id but this is not guaranteed in future. Use the value of the MSR instead of apic_id when interacting with SynIC. Signed-off-by: Roman Kagan <rkagan@virtuozzo.com> --- x86/hyperv.h | 1 + x86/hyperv.c | 13 +++++++++---- 2 files changed, 10 insertions(+), 4 deletions(-)