[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/hv/hv.c b/src/kernel/linux/v4.14/drivers/hv/hv.c
new file mode 100644
index 0000000..23f312b
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/hv/hv.c
@@ -0,0 +1,398 @@
+/*
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * 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 <linux/hyperv.h>
+#include <linux/version.h>
+#include <linux/interrupt.h>
+#include <linux/clockchips.h>
+#include <asm/hyperv.h>
+#include <asm/mshyperv.h>
+#include "hyperv_vmbus.h"
+
+/* The one and only */
+struct hv_context hv_context = {
+ .synic_initialized = false,
+};
+
+#define HV_TIMER_FREQUENCY (10 * 1000 * 1000) /* 100ns period */
+#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
+#define HV_MIN_DELTA_TICKS 1
+
+/*
+ * hv_init - Main initialization routine.
+ *
+ * This routine must be called before any other routines in here are called
+ */
+int hv_init(void)
+{
+ if (!hv_is_hypercall_page_setup())
+ return -ENOTSUPP;
+
+ hv_context.cpu_context = alloc_percpu(struct hv_per_cpu_context);
+ if (!hv_context.cpu_context)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/*
+ * hv_post_message - Post a message using the hypervisor message IPC.
+ *
+ * This involves a hypercall.
+ */
+int hv_post_message(union hv_connection_id connection_id,
+ enum hv_message_type message_type,
+ void *payload, size_t payload_size)
+{
+ struct hv_input_post_message *aligned_msg;
+ struct hv_per_cpu_context *hv_cpu;
+ u64 status;
+
+ if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT)
+ return -EMSGSIZE;
+
+ hv_cpu = get_cpu_ptr(hv_context.cpu_context);
+ aligned_msg = hv_cpu->post_msg_page;
+ aligned_msg->connectionid = connection_id;
+ aligned_msg->reserved = 0;
+ aligned_msg->message_type = message_type;
+ aligned_msg->payload_size = payload_size;
+ memcpy((void *)aligned_msg->payload, payload, payload_size);
+
+ status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL);
+
+ /* Preemption must remain disabled until after the hypercall
+ * so some other thread can't get scheduled onto this cpu and
+ * corrupt the per-cpu post_msg_page
+ */
+ put_cpu_ptr(hv_cpu);
+
+ return status & 0xFFFF;
+}
+
+static int hv_ce_set_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ u64 current_tick;
+
+ WARN_ON(!clockevent_state_oneshot(evt));
+
+ current_tick = hyperv_cs->read(NULL);
+ current_tick += delta;
+ hv_init_timer(HV_X64_MSR_STIMER0_COUNT, current_tick);
+ return 0;
+}
+
+static int hv_ce_shutdown(struct clock_event_device *evt)
+{
+ hv_init_timer(HV_X64_MSR_STIMER0_COUNT, 0);
+ hv_init_timer_config(HV_X64_MSR_STIMER0_CONFIG, 0);
+
+ return 0;
+}
+
+static int hv_ce_set_oneshot(struct clock_event_device *evt)
+{
+ union hv_timer_config timer_cfg;
+
+ timer_cfg.enable = 1;
+ timer_cfg.auto_enable = 1;
+ timer_cfg.sintx = VMBUS_MESSAGE_SINT;
+ hv_init_timer_config(HV_X64_MSR_STIMER0_CONFIG, timer_cfg.as_uint64);
+
+ return 0;
+}
+
+static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu)
+{
+ dev->name = "Hyper-V clockevent";
+ dev->features = CLOCK_EVT_FEAT_ONESHOT;
+ dev->cpumask = cpumask_of(cpu);
+ dev->rating = 1000;
+ /*
+ * Avoid settint dev->owner = THIS_MODULE deliberately as doing so will
+ * result in clockevents_config_and_register() taking additional
+ * references to the hv_vmbus module making it impossible to unload.
+ */
+
+ dev->set_state_shutdown = hv_ce_shutdown;
+ dev->set_state_oneshot = hv_ce_set_oneshot;
+ dev->set_next_event = hv_ce_set_next_event;
+}
+
+
+int hv_synic_alloc(void)
+{
+ int cpu;
+ struct hv_per_cpu_context *hv_cpu;
+
+ /*
+ * First, zero all per-cpu memory areas so hv_synic_free() can
+ * detect what memory has been allocated and cleanup properly
+ * after any failures.
+ */
+ for_each_present_cpu(cpu) {
+ hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
+ memset(hv_cpu, 0, sizeof(*hv_cpu));
+ }
+
+ hv_context.hv_numa_map = kzalloc(sizeof(struct cpumask) * nr_node_ids,
+ GFP_ATOMIC);
+ if (hv_context.hv_numa_map == NULL) {
+ pr_err("Unable to allocate NUMA map\n");
+ goto err;
+ }
+
+ for_each_present_cpu(cpu) {
+ hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
+
+ tasklet_init(&hv_cpu->msg_dpc,
+ vmbus_on_msg_dpc, (unsigned long) hv_cpu);
+
+ hv_cpu->clk_evt = kzalloc(sizeof(struct clock_event_device),
+ GFP_KERNEL);
+ if (hv_cpu->clk_evt == NULL) {
+ pr_err("Unable to allocate clock event device\n");
+ goto err;
+ }
+ hv_init_clockevent_device(hv_cpu->clk_evt, cpu);
+
+ hv_cpu->synic_message_page =
+ (void *)get_zeroed_page(GFP_ATOMIC);
+ if (hv_cpu->synic_message_page == NULL) {
+ pr_err("Unable to allocate SYNIC message page\n");
+ goto err;
+ }
+
+ hv_cpu->synic_event_page = (void *)get_zeroed_page(GFP_ATOMIC);
+ if (hv_cpu->synic_event_page == NULL) {
+ pr_err("Unable to allocate SYNIC event page\n");
+ goto err;
+ }
+
+ hv_cpu->post_msg_page = (void *)get_zeroed_page(GFP_ATOMIC);
+ if (hv_cpu->post_msg_page == NULL) {
+ pr_err("Unable to allocate post msg page\n");
+ goto err;
+ }
+
+ INIT_LIST_HEAD(&hv_cpu->chan_list);
+ }
+
+ return 0;
+err:
+ /*
+ * Any memory allocations that succeeded will be freed when
+ * the caller cleans up by calling hv_synic_free()
+ */
+ return -ENOMEM;
+}
+
+
+void hv_synic_free(void)
+{
+ int cpu;
+
+ for_each_present_cpu(cpu) {
+ struct hv_per_cpu_context *hv_cpu
+ = per_cpu_ptr(hv_context.cpu_context, cpu);
+
+ kfree(hv_cpu->clk_evt);
+ free_page((unsigned long)hv_cpu->synic_event_page);
+ free_page((unsigned long)hv_cpu->synic_message_page);
+ free_page((unsigned long)hv_cpu->post_msg_page);
+ }
+
+ kfree(hv_context.hv_numa_map);
+}
+
+/*
+ * hv_synic_init - Initialize the Synthethic Interrupt Controller.
+ *
+ * If it is already initialized by another entity (ie x2v shim), we need to
+ * retrieve the initialized message and event pages. Otherwise, we create and
+ * initialize the message and event pages.
+ */
+int hv_synic_init(unsigned int cpu)
+{
+ struct hv_per_cpu_context *hv_cpu
+ = per_cpu_ptr(hv_context.cpu_context, cpu);
+ union hv_synic_simp simp;
+ union hv_synic_siefp siefp;
+ union hv_synic_sint shared_sint;
+ union hv_synic_scontrol sctrl;
+
+ /* Setup the Synic's message page */
+ hv_get_simp(simp.as_uint64);
+ simp.simp_enabled = 1;
+ simp.base_simp_gpa = virt_to_phys(hv_cpu->synic_message_page)
+ >> PAGE_SHIFT;
+
+ hv_set_simp(simp.as_uint64);
+
+ /* Setup the Synic's event page */
+ hv_get_siefp(siefp.as_uint64);
+ siefp.siefp_enabled = 1;
+ siefp.base_siefp_gpa = virt_to_phys(hv_cpu->synic_event_page)
+ >> PAGE_SHIFT;
+
+ hv_set_siefp(siefp.as_uint64);
+
+ /* Setup the shared SINT. */
+ hv_get_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);
+
+ shared_sint.as_uint64 = 0;
+ shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
+ shared_sint.masked = false;
+ if (ms_hyperv.hints & HV_X64_DEPRECATING_AEOI_RECOMMENDED)
+ shared_sint.auto_eoi = false;
+ else
+ shared_sint.auto_eoi = true;
+
+ hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);
+
+ /* Enable the global synic bit */
+ hv_get_synic_state(sctrl.as_uint64);
+ sctrl.enable = 1;
+
+ hv_set_synic_state(sctrl.as_uint64);
+
+ hv_context.synic_initialized = true;
+
+ /*
+ * Register the per-cpu clockevent source.
+ */
+ if (ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE)
+ clockevents_config_and_register(hv_cpu->clk_evt,
+ HV_TIMER_FREQUENCY,
+ HV_MIN_DELTA_TICKS,
+ HV_MAX_MAX_DELTA_TICKS);
+ return 0;
+}
+
+/*
+ * hv_synic_clockevents_cleanup - Cleanup clockevent devices
+ */
+void hv_synic_clockevents_cleanup(void)
+{
+ int cpu;
+
+ if (!(ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE))
+ return;
+
+ for_each_present_cpu(cpu) {
+ struct hv_per_cpu_context *hv_cpu
+ = per_cpu_ptr(hv_context.cpu_context, cpu);
+
+ clockevents_unbind_device(hv_cpu->clk_evt, cpu);
+ }
+}
+
+/*
+ * hv_synic_cleanup - Cleanup routine for hv_synic_init().
+ */
+int hv_synic_cleanup(unsigned int cpu)
+{
+ union hv_synic_sint shared_sint;
+ union hv_synic_simp simp;
+ union hv_synic_siefp siefp;
+ union hv_synic_scontrol sctrl;
+ struct vmbus_channel *channel, *sc;
+ bool channel_found = false;
+ unsigned long flags;
+
+ if (!hv_context.synic_initialized)
+ return -EFAULT;
+
+ /*
+ * Search for channels which are bound to the CPU we're about to
+ * cleanup. In case we find one and vmbus is still connected we need to
+ * fail, this will effectively prevent CPU offlining. There is no way
+ * we can re-bind channels to different CPUs for now.
+ */
+ mutex_lock(&vmbus_connection.channel_mutex);
+ list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
+ if (channel->target_cpu == cpu) {
+ channel_found = true;
+ break;
+ }
+ spin_lock_irqsave(&channel->lock, flags);
+ list_for_each_entry(sc, &channel->sc_list, sc_list) {
+ if (sc->target_cpu == cpu) {
+ channel_found = true;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&channel->lock, flags);
+ if (channel_found)
+ break;
+ }
+ mutex_unlock(&vmbus_connection.channel_mutex);
+
+ if (channel_found && vmbus_connection.conn_state == CONNECTED)
+ return -EBUSY;
+
+ /* Turn off clockevent device */
+ if (ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE) {
+ struct hv_per_cpu_context *hv_cpu
+ = this_cpu_ptr(hv_context.cpu_context);
+
+ clockevents_unbind_device(hv_cpu->clk_evt, cpu);
+ hv_ce_shutdown(hv_cpu->clk_evt);
+ }
+
+ hv_get_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);
+
+ shared_sint.masked = 1;
+
+ /* Need to correctly cleanup in the case of SMP!!! */
+ /* Disable the interrupt */
+ hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);
+
+ hv_get_simp(simp.as_uint64);
+ simp.simp_enabled = 0;
+ simp.base_simp_gpa = 0;
+
+ hv_set_simp(simp.as_uint64);
+
+ hv_get_siefp(siefp.as_uint64);
+ siefp.siefp_enabled = 0;
+ siefp.base_siefp_gpa = 0;
+
+ hv_set_siefp(siefp.as_uint64);
+
+ /* Disable the global synic bit */
+ hv_get_synic_state(sctrl.as_uint64);
+ sctrl.enable = 0;
+ hv_set_synic_state(sctrl.as_uint64);
+
+ return 0;
+}