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authorVitaly Kuznetsov <vkuznets@redhat.com>2017-08-02 19:09:18 +0300
committerIngo Molnar <mingo@kernel.org>2017-08-10 17:50:23 +0300
commit7415aea6072bab15969b6c3c5b2a193d88095326 (patch)
treea1a7c9ea22e6c60daa322a56ee1c26e20ba89873 /drivers/hv
parent806c89273bab0c8af0202a6fb6279f36042cb2e6 (diff)
downloadlinux-7415aea6072bab15969b6c3c5b2a193d88095326.tar.xz
hyper-v: Globalize vp_index
To support implementing remote TLB flushing on Hyper-V with a hypercall we need to make vp_index available outside of vmbus module. Rename and globalize. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-7-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/channel_mgmt.c7
-rw-r--r--drivers/hv/connection.c3
-rw-r--r--drivers/hv/hv.c9
-rw-r--r--drivers/hv/hyperv_vmbus.h11
-rw-r--r--drivers/hv/vmbus_drv.c17
5 files changed, 5 insertions, 42 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index fd2b6c67f781..dc590195a74e 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -599,7 +599,7 @@ static void init_vp_index(struct vmbus_channel *channel, u16 dev_type)
*/
channel->numa_node = 0;
channel->target_cpu = 0;
- channel->target_vp = hv_context.vp_index[0];
+ channel->target_vp = hv_cpu_number_to_vp_number(0);
return;
}
@@ -683,7 +683,7 @@ static void init_vp_index(struct vmbus_channel *channel, u16 dev_type)
}
channel->target_cpu = cur_cpu;
- channel->target_vp = hv_context.vp_index[cur_cpu];
+ channel->target_vp = hv_cpu_number_to_vp_number(cur_cpu);
}
static void vmbus_wait_for_unload(void)
@@ -1219,8 +1219,7 @@ struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary)
return outgoing_channel;
}
- cur_cpu = hv_context.vp_index[get_cpu()];
- put_cpu();
+ cur_cpu = hv_cpu_number_to_vp_number(smp_processor_id());
list_for_each_safe(cur, tmp, &primary->sc_list) {
cur_channel = list_entry(cur, struct vmbus_channel, sc_list);
if (cur_channel->state != CHANNEL_OPENED_STATE)
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 37ecf514189e..f41901f80b64 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -96,7 +96,8 @@ static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo,
* the CPU attempting to connect may not be CPU 0.
*/
if (version >= VERSION_WIN8_1) {
- msg->target_vcpu = hv_context.vp_index[smp_processor_id()];
+ msg->target_vcpu =
+ hv_cpu_number_to_vp_number(smp_processor_id());
vmbus_connection.connect_cpu = smp_processor_id();
} else {
msg->target_vcpu = 0;
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 2ea12207caa0..8267439dd1ee 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -234,7 +234,6 @@ int hv_synic_init(unsigned int cpu)
union hv_synic_siefp siefp;
union hv_synic_sint shared_sint;
union hv_synic_scontrol sctrl;
- u64 vp_index;
/* Setup the Synic's message page */
hv_get_simp(simp.as_uint64);
@@ -276,14 +275,6 @@ int hv_synic_init(unsigned int cpu)
hv_context.synic_initialized = true;
/*
- * Setup the mapping between Hyper-V's notion
- * of cpuid and Linux' notion of cpuid.
- * This array will be indexed using Linux cpuid.
- */
- hv_get_vp_index(vp_index);
- hv_context.vp_index[cpu] = (u32)vp_index;
-
- /*
* Register the per-cpu clockevent source.
*/
if (ms_hyperv.features & HV_X64_MSR_SYNTIMER_AVAILABLE)
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 1b6a5e0dfa75..49569f8fe038 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -229,17 +229,6 @@ struct hv_context {
struct hv_per_cpu_context __percpu *cpu_context;
/*
- * Hypervisor's notion of virtual processor ID is different from
- * Linux' notion of CPU ID. This information can only be retrieved
- * in the context of the calling CPU. Setup a map for easy access
- * to this information:
- *
- * vp_index[a] is the Hyper-V's processor ID corresponding to
- * Linux cpuid 'a'.
- */
- u32 vp_index[NR_CPUS];
-
- /*
* To manage allocations in a NUMA node.
* Array indexed by numa node ID.
*/
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index ed84e96715a0..c7e7d6db2d21 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1451,23 +1451,6 @@ void vmbus_free_mmio(resource_size_t start, resource_size_t size)
}
EXPORT_SYMBOL_GPL(vmbus_free_mmio);
-/**
- * vmbus_cpu_number_to_vp_number() - Map CPU to VP.
- * @cpu_number: CPU number in Linux terms
- *
- * This function returns the mapping between the Linux processor
- * number and the hypervisor's virtual processor number, useful
- * in making hypercalls and such that talk about specific
- * processors.
- *
- * Return: Virtual processor number in Hyper-V terms
- */
-int vmbus_cpu_number_to_vp_number(int cpu_number)
-{
- return hv_context.vp_index[cpu_number];
-}
-EXPORT_SYMBOL_GPL(vmbus_cpu_number_to_vp_number);
-
static int vmbus_acpi_add(struct acpi_device *device)
{
acpi_status result;