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Groups > linux.kernel > #1708870
| From | tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [tip:x86/platform] hyper-v: Use fast hypercall for HVCALL_SIGNAL_EVENT |
| Date | 2017-08-10 18:50 +0200 |
| Message-ID | <ucYOL-8aT-43@gated-at.bofh.it> (permalink) |
| References | <ua4xk-3Io-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Commit-ID: 057841713cfff62b4485cdd2b245f05b7ea3ba16
Gitweb: http://git.kernel.org/tip/057841713cfff62b4485cdd2b245f05b7ea3ba16
Author: Vitaly Kuznetsov <vkuznets@redhat.com>
AuthorDate: Wed, 2 Aug 2017 18:09:16 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 10 Aug 2017 16:50:22 +0200
hyper-v: Use fast hypercall for HVCALL_SIGNAL_EVENT
We need to pass only 8 bytes of input for HvSignalEvent which makes it a
perfect fit for fast hypercall. hv_input_signal_event_buffer is not needed
any more and hv_input_signal_event is converted to union for convenience.
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/20170802160921.21791-5-vkuznets@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
drivers/hv/channel_mgmt.c | 13 ++-----------
drivers/hv/connection.c | 2 +-
include/linux/hyperv.h | 15 +--------------
3 files changed, 4 insertions(+), 26 deletions(-)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 4bbb8de..fd2b6c6 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -805,21 +805,12 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
/*
* Setup state for signalling the host.
*/
- newchannel->sig_event = (struct hv_input_signal_event *)
- (ALIGN((unsigned long)
- &newchannel->sig_buf,
- HV_HYPERCALL_PARAM_ALIGN));
-
- newchannel->sig_event->connectionid.asu32 = 0;
- newchannel->sig_event->connectionid.u.id = VMBUS_EVENT_CONNECTION_ID;
- newchannel->sig_event->flag_number = 0;
- newchannel->sig_event->rsvdz = 0;
+ newchannel->sig_event = VMBUS_EVENT_CONNECTION_ID;
if (vmbus_proto_version != VERSION_WS2008) {
newchannel->is_dedicated_interrupt =
(offer->is_dedicated_interrupt != 0);
- newchannel->sig_event->connectionid.u.id =
- offer->connection_id;
+ newchannel->sig_event = offer->connection_id;
}
memcpy(&newchannel->offermsg, offer,
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 45e806e..37ecf51 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -408,6 +408,6 @@ void vmbus_set_event(struct vmbus_channel *channel)
if (!channel->is_dedicated_interrupt)
vmbus_send_interrupt(child_relid);
- hv_do_hypercall(HVCALL_SIGNAL_EVENT, channel->sig_event, NULL);
+ hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event);
}
EXPORT_SYMBOL_GPL(vmbus_set_event);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 6608a71..c472bd4 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -677,18 +677,6 @@ union hv_connection_id {
} u;
};
-/* Definition of the hv_signal_event hypercall input structure. */
-struct hv_input_signal_event {
- union hv_connection_id connectionid;
- u16 flag_number;
- u16 rsvdz;
-};
-
-struct hv_input_signal_event_buffer {
- u64 align8;
- struct hv_input_signal_event event;
-};
-
enum hv_numa_policy {
HV_BALANCED = 0,
HV_LOCALIZED,
@@ -770,8 +758,7 @@ struct vmbus_channel {
} callback_mode;
bool is_dedicated_interrupt;
- struct hv_input_signal_event_buffer sig_buf;
- struct hv_input_signal_event *sig_event;
+ u64 sig_event;
/*
* Starting with win8, this field will be used to specify
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[PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[PATCH v10 1/9] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[tip:x86/platform] x86/hyper-v: Include hyperv/ only when CONFIG_HYPERV is set tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 3/9] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[tip:x86/platform] x86/hyper-v: Introduce fast hypercall implementation tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 7/9] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 20:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-10 21:00 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-10 21:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 11:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-11 13:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-11 18:20 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 18:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-11 11:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 13:00 +0200
Re: [Xen-devel] [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Andrew Cooper <andrew.cooper3@citrix.com> - 2017-08-11 13:10 +0200
Re: [Xen-devel] [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 14:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 14:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 14:40 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 14:50 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 15:00 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 15:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 15:50 +0200
[PATCH v10 4/9] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] hyper-v: Use fast hypercall for HVCALL_SIGNAL_EVENT tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 5/9] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] x86/hyper-v: Implement rep hypercalls tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 8/9] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[PATCH v10 9/9] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[PATCH v10 6/9] hyper-v: globalize vp_index Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] hyper-v: Globalize vp_index tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 14:00 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Ingo Molnar <mingo@kernel.org> - 2017-08-10 17:20 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 17:20 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 19:10 +0200
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