From: Roman Kagan <rkagan@virtuozzo.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
kvm@vger.kernel.org, "Denis V . Lunev" <den@openvz.org>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
"Ingo Molnar" <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
devel@linuxdriverproject.org,
"Thomas Gleixner" <tglx@linutronix.de>
Subject: Re: [PATCH 02/15] hyperv: uapi-fy synic event flags definitions
Date: Wed, 21 Dec 2016 09:33:05 +0300 [thread overview]
Message-ID: <20161221063305.GC15917@rkaganb.sw.ru> (raw)
In-Reply-To: <20161220092453.20d3a640@xeon-e3>
On Tue, Dec 20, 2016 at 09:24:53AM -0800, Stephen Hemminger wrote:
> On Tue, 20 Dec 2016 18:55:49 +0300
> Roman Kagan <rkagan@virtuozzo.com> wrote:
>
> > Move definitions related to the Hyper-V SynIC event flags to a header
> > where they can be consumed by userspace.
> >
> > While doing so, also clean up their use by switching to standard bitops
> > and struct-based dereferencing. The latter is also done for message
> > pages.
> >
> > Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
> > ---
> > arch/x86/include/uapi/asm/hyperv.h | 13 +++++++++
> > drivers/hv/hyperv_vmbus.h | 24 ++--------------
> > drivers/hv/channel_mgmt.c | 10 +++----
> > drivers/hv/connection.c | 47 ++++++++++---------------------
> > drivers/hv/vmbus_drv.c | 57 ++++++++++++++------------------------
> > 5 files changed, 54 insertions(+), 97 deletions(-)
> >
> > diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
> > index 6098ab5..af542a3 100644
> > --- a/arch/x86/include/uapi/asm/hyperv.h
> > +++ b/arch/x86/include/uapi/asm/hyperv.h
> > @@ -363,4 +363,17 @@ struct hv_timer_message_payload {
> > #define HV_STIMER_AUTOENABLE (1ULL << 3)
> > #define HV_STIMER_SINT(config) (__u8)(((config) >> 16) & 0x0F)
> >
> > +/* Define synthetic interrupt controller flag constants. */
> > +#define HV_EVENT_FLAGS_COUNT (256 * 8)
> > +
> > +/* Define the synthetic interrupt controller event flags format. */
> > +struct hv_synic_event_flags {
> > + __u64 flags[HV_EVENT_FLAGS_COUNT / 64];
> > +};
> > +
> > +/* Define the synthetic interrupt flags page layout. */
> > +struct hv_synic_event_flags_page {
> > + struct hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
> > +};
> > +
> > #endif
>
> How are these going to be exposed to user space?
>
> They should really be unsigned long since there is no guarantee of atomic operation
> on 64 bit values on 32 bit architectures.
Indeed, absolutely. These are bitmaps and should be unsigned long[], of
course. I'll fix it in the next iteration.
Thanks,
Roman.
next prev parent reply other threads:[~2016-12-21 7:33 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-20 15:55 [PATCH 00/15] hyperv: more stuff to uapi + cleanup Roman Kagan
2016-12-20 15:55 ` [PATCH 01/15] hyperv: consolidate TSC ref page definitions Roman Kagan
2016-12-20 20:57 ` KY Srinivasan
2016-12-21 6:25 ` Roman Kagan
2016-12-20 15:55 ` [PATCH 02/15] hyperv: uapi-fy synic event flags definitions Roman Kagan
2016-12-20 17:24 ` Stephen Hemminger
2016-12-21 6:33 ` Roman Kagan [this message]
2016-12-21 10:58 ` kbuild test robot
2016-12-21 18:58 ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 03/15] hyperv: use standard bitops Roman Kagan
2016-12-21 12:00 ` Olaf Hering
2016-12-21 13:23 ` Roman Kagan
2016-12-22 12:33 ` Paolo Bonzini
2016-12-21 19:08 ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 04/15] hyperv: define VMBus message type Roman Kagan
2016-12-20 15:55 ` [PATCH 05/15] hyperv: GFP_ATOMIC -> GFP_KERNEL Roman Kagan
2016-12-20 15:55 ` [PATCH 06/15] hyperv: avoid unnecessary vmalloc Roman Kagan
2016-12-21 19:19 ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 07/15] hyperv: dedup cpuid definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 08/15] hyperv: dedup crash msr related definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 09/15] hyperv: unify Hyper-V msr definitions Roman Kagan
2016-12-20 15:55 ` [PATCH 10/15] hyperv: uapi-fy PostMessage and SignalEvent hypercall structures Roman Kagan
2016-12-21 19:27 ` KY Srinivasan
2016-12-20 15:55 ` [PATCH 11/15] hyperv: uapi-fy monitored notification structures Roman Kagan
2016-12-20 15:55 ` [PATCH 12/15] hyperv: move VMBus connection ids to uapi Roman Kagan
2016-12-20 17:25 ` Stephen Hemminger
2016-12-21 6:29 ` Roman Kagan
2016-12-21 12:18 ` Christoph Hellwig
2016-12-21 12:59 ` Roman Kagan
2016-12-21 14:26 ` Christoph Hellwig
2016-12-21 14:39 ` Roman Kagan
2016-12-21 15:39 ` Paolo Bonzini
2016-12-21 15:43 ` Christoph Hellwig
2016-12-21 17:25 ` Paolo Bonzini
2016-12-21 17:50 ` Stephen Hemminger
2016-12-21 17:53 ` Paolo Bonzini
2016-12-21 17:58 ` Christoph Hellwig
2016-12-21 18:02 ` Stephen Hemminger
2016-12-21 19:54 ` KY Srinivasan
2016-12-28 17:09 ` Roman Kagan
2016-12-29 18:29 ` Stephen Hemminger
2017-01-02 8:19 ` Paolo Bonzini
2017-01-09 8:32 ` Roman Kagan
2017-01-09 8:40 ` hpa
2017-01-09 8:58 ` Roman Kagan
2017-01-09 9:02 ` Paolo Bonzini
2017-01-02 19:39 ` Stephen Hemminger
2017-01-03 9:32 ` Paolo Bonzini
2016-12-20 15:56 ` [PATCH 13/15] hyperv: move function close to its only callsite Roman Kagan
2016-12-20 15:56 ` [PATCH 14/15] hyperv_vmbus: drop unused definitions Roman Kagan
2016-12-20 15:56 ` [PATCH 15/15] hyperv: redefine hv_message without bitfields Roman Kagan
2016-12-21 18:00 ` [PATCH 00/15] hyperv: more stuff to uapi + cleanup KY Srinivasan
2016-12-28 16:57 ` Roman Kagan
2016-12-30 19:45 ` KY Srinivasan
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