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Diffstat (limited to 'drivers/staging/hv/hv.c')
-rw-r--r--drivers/staging/hv/hv.c111
1 files changed, 21 insertions, 90 deletions
diff --git a/drivers/staging/hv/hv.c b/drivers/staging/hv/hv.c
index 0b06f4fe5838..a2cc0911de58 100644
--- a/drivers/staging/hv/hv.c
+++ b/drivers/staging/hv/hv.c
@@ -19,13 +19,15 @@
* Hank Janssen <hjanssen@microsoft.com>
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
-#include "hv_api.h"
-#include "logging.h"
-#include "vmbus_private.h"
+
+#include "hyperv.h"
+#include "hyperv_vmbus.h"
/* The one and only */
struct hv_context hv_context = {
@@ -80,33 +82,7 @@ static int query_hypervisor_info(void)
op = HVCPUID_VENDOR_MAXFUNCTION;
cpuid(op, &eax, &ebx, &ecx, &edx);
- DPRINT_INFO(VMBUS, "Vendor ID: %c%c%c%c%c%c%c%c%c%c%c%c",
- (ebx & 0xFF),
- ((ebx >> 8) & 0xFF),
- ((ebx >> 16) & 0xFF),
- ((ebx >> 24) & 0xFF),
- (ecx & 0xFF),
- ((ecx >> 8) & 0xFF),
- ((ecx >> 16) & 0xFF),
- ((ecx >> 24) & 0xFF),
- (edx & 0xFF),
- ((edx >> 8) & 0xFF),
- ((edx >> 16) & 0xFF),
- ((edx >> 24) & 0xFF));
-
max_leaf = eax;
- eax = 0;
- ebx = 0;
- ecx = 0;
- edx = 0;
- op = HVCPUID_INTERFACE;
- cpuid(op, &eax, &ebx, &ecx, &edx);
-
- DPRINT_INFO(VMBUS, "Interface ID: %c%c%c%c",
- (eax & 0xFF),
- ((eax >> 8) & 0xFF),
- ((eax >> 16) & 0xFF),
- ((eax >> 24) & 0xFF));
if (max_leaf >= HVCPUID_VERSION) {
eax = 0;
@@ -115,7 +91,7 @@ static int query_hypervisor_info(void)
edx = 0;
op = HVCPUID_VERSION;
cpuid(op, &eax, &ebx, &ecx, &edx);
- DPRINT_INFO(VMBUS, "OS Build:%d-%d.%d-%d-%d.%d",\
+ pr_info("Hyper-V Host OS Build:%d-%d.%d-%d-%d.%d\n",
eax,
ebx >> 16,
ebx & 0xFFFF,
@@ -137,18 +113,11 @@ static u64 do_hypercall(u64 control, void *input, void *output)
u64 output_address = (output) ? virt_to_phys(output) : 0;
volatile void *hypercall_page = hv_context.hypercall_page;
- DPRINT_DBG(VMBUS, "Hypercall <control %llx input phys %llx virt %p "
- "output phys %llx virt %p hypercall %p>",
- control, input_address, input,
- output_address, output, hypercall_page);
-
__asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8");
__asm__ __volatile__("call *%3" : "=a" (hv_status) :
"c" (control), "d" (input_address),
"m" (hypercall_page));
- DPRINT_DBG(VMBUS, "Hypercall <return %llx>", hv_status);
-
return hv_status;
#else
@@ -165,18 +134,12 @@ static u64 do_hypercall(u64 control, void *input, void *output)
u32 output_address_lo = output_address & 0xFFFFFFFF;
volatile void *hypercall_page = hv_context.hypercall_page;
- DPRINT_DBG(VMBUS, "Hypercall <control %llx input %p output %p>",
- control, input, output);
-
__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));
- DPRINT_DBG(VMBUS, "Hypercall <return %llx>",
- hv_status_lo | ((u64)hv_status_hi << 32));
-
return hv_status_lo | ((u64)hv_status_hi << 32);
#endif /* !x86_64 */
}
@@ -197,13 +160,8 @@ int hv_init(void)
memset(hv_context.synic_message_page, 0,
sizeof(void *) * MAX_NUM_CPUS);
- if (!query_hypervisor_presence()) {
- DPRINT_ERR(VMBUS, "No Windows hypervisor detected!!");
- goto Cleanup;
- }
-
- DPRINT_INFO(VMBUS,
- "Windows hypervisor detected! Retrieving more info...");
+ if (!query_hypervisor_presence())
+ goto cleanup;
max_leaf = query_hypervisor_info();
/* HvQueryHypervisorFeatures(maxLeaf); */
@@ -213,11 +171,8 @@ int hv_init(void)
*/
rdmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid);
- if (hv_context.guestid != 0) {
- DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!",
- hv_context.guestid);
- goto Cleanup;
- }
+ if (hv_context.guestid != 0)
+ goto cleanup;
/* Write our OS info */
wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID);
@@ -232,11 +187,8 @@ int hv_init(void)
*/
virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC);
- if (!virtaddr) {
- DPRINT_ERR(VMBUS,
- "unable to allocate hypercall page!!");
- goto Cleanup;
- }
+ if (!virtaddr)
+ goto cleanup;
hypercall_msr.enable = 1;
@@ -247,23 +199,17 @@ int hv_init(void)
hypercall_msr.as_uint64 = 0;
rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
- if (!hypercall_msr.enable) {
- DPRINT_ERR(VMBUS, "unable to set hypercall page!!");
- goto Cleanup;
- }
+ if (!hypercall_msr.enable)
+ goto cleanup;
hv_context.hypercall_page = virtaddr;
- DPRINT_INFO(VMBUS, "Hypercall page VA=%p, PA=0x%0llx",
- hv_context.hypercall_page,
- (u64)hypercall_msr.guest_physical_address << PAGE_SHIFT);
-
/* Setup the global signal event param for the signal event hypercall */
hv_context.signal_event_buffer =
kmalloc(sizeof(struct hv_input_signal_event_buffer),
GFP_KERNEL);
if (!hv_context.signal_event_buffer)
- goto Cleanup;
+ goto cleanup;
hv_context.signal_event_param =
(struct hv_input_signal_event *)
@@ -278,7 +224,7 @@ int hv_init(void)
return ret;
-Cleanup:
+cleanup:
if (virtaddr) {
if (hypercall_msr.enable) {
hypercall_msr.as_uint64 = 0;
@@ -394,24 +340,20 @@ void hv_synic_init(void *irqarg)
/* Check the version */
rdmsrl(HV_X64_MSR_SVERSION, version);
- DPRINT_INFO(VMBUS, "SynIC version: %llx", version);
-
hv_context.synic_message_page[cpu] =
(void *)get_zeroed_page(GFP_ATOMIC);
if (hv_context.synic_message_page[cpu] == NULL) {
- DPRINT_ERR(VMBUS,
- "unable to allocate SYNIC message page!!");
- goto Cleanup;
+ pr_err("Unable to allocate SYNIC message page\n");
+ goto cleanup;
}
hv_context.synic_event_page[cpu] =
(void *)get_zeroed_page(GFP_ATOMIC);
if (hv_context.synic_event_page[cpu] == NULL) {
- DPRINT_ERR(VMBUS,
- "unable to allocate SYNIC event page!!");
- goto Cleanup;
+ pr_err("Unable to allocate SYNIC event page\n");
+ goto cleanup;
}
/* Setup the Synic's message page */
@@ -420,8 +362,6 @@ void hv_synic_init(void *irqarg)
simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu])
>> PAGE_SHIFT;
- DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx", simp.as_uint64);
-
wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64);
/* Setup the Synic's event page */
@@ -430,14 +370,8 @@ void hv_synic_init(void *irqarg)
siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu])
>> PAGE_SHIFT;
- DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx", siefp.as_uint64);
-
wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64);
- /* Setup the interception SINT. */
- /* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */
- /* interceptionSint.as_uint64); */
-
/* Setup the shared SINT. */
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
@@ -446,9 +380,6 @@ void hv_synic_init(void *irqarg)
shared_sint.masked = false;
shared_sint.auto_eoi = true;
- DPRINT_DBG(VMBUS, "HV_X64_MSR_SINT1 msr set to: %llx",
- shared_sint.as_uint64);
-
wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
/* Enable the global synic bit */
@@ -460,7 +391,7 @@ void hv_synic_init(void *irqarg)
hv_context.synic_initialized = true;
return;
-Cleanup:
+cleanup:
if (hv_context.synic_event_page[cpu])
free_page((unsigned long)hv_context.synic_event_page[cpu]);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.