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Diffstat (limited to 'drivers/hv/hv.c')
-rw-r--r--drivers/hv/hv.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 6341be8739ae..11bca51ef5ff 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -89,9 +89,9 @@ static int query_hypervisor_info(void)
}
/*
- * do_hypercall- Invoke the specified hypercall
+ * hv_do_hypercall- Invoke the specified hypercall
*/
-static u64 do_hypercall(u64 control, void *input, void *output)
+u64 hv_do_hypercall(u64 control, void *input, void *output)
{
u64 input_address = (input) ? virt_to_phys(input) : 0;
u64 output_address = (output) ? virt_to_phys(output) : 0;
@@ -132,6 +132,7 @@ static u64 do_hypercall(u64 control, void *input, void *output)
return hv_status_lo | ((u64)hv_status_hi << 32);
#endif /* !x86_64 */
}
+EXPORT_SYMBOL_GPL(hv_do_hypercall);
#ifdef CONFIG_X86_64
static cycle_t read_hv_clock_tsc(struct clocksource *arg)
@@ -139,7 +140,7 @@ static cycle_t read_hv_clock_tsc(struct clocksource *arg)
cycle_t current_tick;
struct ms_hyperv_tsc_page *tsc_pg = hv_context.tsc_page;
- if (tsc_pg->tsc_sequence != -1) {
+ if (tsc_pg->tsc_sequence != 0) {
/*
* Use the tsc page to compute the value.
*/
@@ -161,7 +162,7 @@ static cycle_t read_hv_clock_tsc(struct clocksource *arg)
if (tsc_pg->tsc_sequence == sequence)
return current_tick;
- if (tsc_pg->tsc_sequence != -1)
+ if (tsc_pg->tsc_sequence != 0)
continue;
/*
* Fallback using MSR method.
@@ -192,9 +193,7 @@ int hv_init(void)
{
int max_leaf;
union hv_x64_msr_hypercall_contents hypercall_msr;
- union hv_x64_msr_hypercall_contents tsc_msr;
void *virtaddr = NULL;
- void *va_tsc = NULL;
memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
memset(hv_context.synic_message_page, 0,
@@ -240,6 +239,9 @@ int hv_init(void)
#ifdef CONFIG_X86_64
if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
+ union hv_x64_msr_hypercall_contents tsc_msr;
+ void *va_tsc;
+
va_tsc = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL);
if (!va_tsc)
goto cleanup;
@@ -315,7 +317,7 @@ int hv_post_message(union hv_connection_id connection_id,
{
struct hv_input_post_message *aligned_msg;
- u16 status;
+ u64 status;
if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT)
return -EMSGSIZE;
@@ -329,11 +331,10 @@ int hv_post_message(union hv_connection_id connection_id,
aligned_msg->payload_size = payload_size;
memcpy((void *)aligned_msg->payload, payload, payload_size);
- status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL)
- & 0xFFFF;
+ status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL);
put_cpu();
- return status;
+ return status & 0xFFFF;
}
@@ -343,13 +344,13 @@ int hv_post_message(union hv_connection_id connection_id,
*
* This involves a hypercall.
*/
-u16 hv_signal_event(void *con_id)
+int hv_signal_event(void *con_id)
{
- u16 status;
+ u64 status;
- status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF);
+ status = hv_do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL);
- return status;
+ return status & 0xFFFF;
}
static int hv_ce_set_next_event(unsigned long delta,