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authorK. Y. Srinivasan <kys@microsoft.com>2017-01-19 02:45:03 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-19 13:44:55 +0300
commit6ab42a66d2cc10afefea9f9e5d9a5ad5a836d254 (patch)
tree4cc1351189ba26b42e2e49aa0242154f7d2b98e7 /drivers/hv
parent8730046c1498e8fb8c9a124789893944e8ce8220 (diff)
downloadlinux-6ab42a66d2cc10afefea9f9e5d9a5ad5a836d254.tar.xz
Drivers: hv: vmbus: Move Hypercall invocation code out of common code
As part of the effort to separate out architecture specific code, move the hypercall invocation code to an architecture specific file. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/hv.c52
-rw-r--r--drivers/hv/hyperv_vmbus.h1
2 files changed, 0 insertions, 53 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index d8d41542d93c..fd3b9b98a29d 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -36,7 +36,6 @@
/* The one and only */
struct hv_context hv_context = {
.synic_initialized = false,
- .hypercall_page = NULL,
};
#define HV_TIMER_FREQUENCY (10 * 1000 * 1000) /* 100ns period */
@@ -88,52 +87,6 @@ static int query_hypervisor_info(void)
return max_leaf;
}
-/*
- * hv_do_hypercall- Invoke the specified hypercall
- */
-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;
- void *hypercall_page = hv_context.hypercall_page;
-#ifdef CONFIG_X86_64
- u64 hv_status = 0;
-
- if (!hypercall_page)
- return (u64)ULLONG_MAX;
-
- __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8");
- __asm__ __volatile__("call *%3" : "=a" (hv_status) :
- "c" (control), "d" (input_address),
- "m" (hypercall_page));
-
- return hv_status;
-
-#else
-
- u32 control_hi = control >> 32;
- u32 control_lo = control & 0xFFFFFFFF;
- u32 hv_status_hi = 1;
- u32 hv_status_lo = 1;
- u32 input_address_hi = input_address >> 32;
- u32 input_address_lo = input_address & 0xFFFFFFFF;
- u32 output_address_hi = output_address >> 32;
- u32 output_address_lo = output_address & 0xFFFFFFFF;
-
- if (!hypercall_page)
- return (u64)ULLONG_MAX;
-
- __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi),
- "=a"(hv_status_lo) : "d" (control_hi),
- "a" (control_lo), "b" (input_address_hi),
- "c" (input_address_lo), "D"(output_address_hi),
- "S"(output_address_lo), "m" (hypercall_page));
-
- return hv_status_lo | ((u64)hv_status_hi << 32);
-#endif /* !x86_64 */
-}
-EXPORT_SYMBOL_GPL(hv_do_hypercall);
-
#ifdef CONFIG_X86_64
static u64 read_hv_clock_tsc(struct clocksource *arg)
{
@@ -218,8 +171,6 @@ int hv_init(void)
if (!hypercall_msr.enable)
return -ENOTSUPP;
- hv_context.hypercall_page = hv_hypercall_pg;
-
#ifdef CONFIG_X86_64
if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
union hv_x64_msr_hypercall_contents tsc_msr;
@@ -466,9 +417,6 @@ int hv_synic_init(unsigned int cpu)
union hv_synic_scontrol sctrl;
u64 vp_index;
- if (!hv_context.hypercall_page)
- return -EFAULT;
-
/* Check the version */
rdmsrl(HV_X64_MSR_SVERSION, version);
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index da57626786b7..09485269d537 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -371,7 +371,6 @@ struct hv_context {
*/
u64 guestid;
- void *hypercall_page;
void *tsc_page;
bool synic_initialized;