From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Anchal Agarwal <anchalag@amazon.com>,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
hpa@zytor.com, x86@kernel.org, jgross@suse.com,
linux-pm@vger.kernel.org, linux-mm@kvack.org, kamatam@amazon.com,
sstabellini@kernel.org, konrad.wilk@oracle.com,
roger.pau@citrix.com, axboe@kernel.dk, davem@davemloft.net,
rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz,
peterz@infradead.org, eduval@amazon.com, sblbir@amazon.com,
xen-devel@lists.xenproject.org, vkuznets@redhat.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
dwmw@amazon.co.uk, benh@kernel.crashing.org
Subject: Re: [PATCH 04/12] x86/xen: add system core suspend and resume callbacks
Date: Sat, 30 May 2020 19:10:04 -0400 [thread overview]
Message-ID: <4b577564-e4c3-0182-2b9e-5f79004f32a1@oracle.com> (raw)
In-Reply-To: <79cf02631dc00e62ebf90410bfbbdb52fe7024cb.1589926004.git.anchalag@amazon.com>
On 5/19/20 7:26 PM, Anchal Agarwal wrote:
> From: Munehisa Kamata <kamatam@amazon.com>
>
> Add Xen PVHVM specific system core callbacks for PM suspend and
> hibernation support. The callbacks suspend and resume Xen
> primitives,like shared_info, pvclock and grant table. Note that
> Xen suspend can handle them in a different manner, but system
> core callbacks are called from the context.
I don't think I understand that last sentence.
> So if the callbacks
> are called from Xen suspend context, return immediately.
>
> +
> +static int xen_syscore_suspend(void)
> +{
> + struct xen_remove_from_physmap xrfp;
> + int ret;
> +
> + /* Xen suspend does similar stuffs in its own logic */
> + if (xen_suspend_mode_is_xen_suspend())
> + return 0;
> +
> + xrfp.domid = DOMID_SELF;
> + xrfp.gpfn = __pa(HYPERVISOR_shared_info) >> PAGE_SHIFT;
> +
> + ret = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, &xrfp);
> + if (!ret)
> + HYPERVISOR_shared_info = &xen_dummy_shared_info;
> +
> + return ret;
> +}
> +
> +static void xen_syscore_resume(void)
> +{
> + /* Xen suspend does similar stuffs in its own logic */
> + if (xen_suspend_mode_is_xen_suspend())
> + return;
> +
> + /* No need to setup vcpu_info as it's already moved off */
> + xen_hvm_map_shared_info();
> +
> + pvclock_resume();
> +
> + gnttab_resume();
Do you call gnttab_suspend() in pm suspend path?
> +}
> +
> +/*
> + * These callbacks will be called with interrupts disabled and when having only
> + * one CPU online.
> + */
> +static struct syscore_ops xen_hvm_syscore_ops = {
> + .suspend = xen_syscore_suspend,
> + .resume = xen_syscore_resume
> +};
> +
> +void __init xen_setup_syscore_ops(void)
> +{
> + if (xen_hvm_domain())
Have you tested this (the whole feature, not just this patch) with PVH
guest BTW? And PVH dom0 for that matter?
-boris
> + register_syscore_ops(&xen_hvm_syscore_ops);
> +}
next prev parent reply other threads:[~2020-05-30 23:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 23:24 [PATCH 00/12] Fix PM hibernation in Xen guests Anchal Agarwal
2020-05-19 23:24 ` [PATCH 01/12] xen/manage: keep track of the on-going suspend mode Anchal Agarwal
2020-05-30 22:26 ` Boris Ostrovsky
2020-06-01 21:00 ` Agarwal, Anchal
2020-06-01 22:39 ` Boris Ostrovsky
2020-05-19 23:25 ` [PATCH 02/12] xenbus: add freeze/thaw/restore callbacks support Anchal Agarwal
2020-05-30 22:56 ` Boris Ostrovsky
2020-06-01 23:36 ` Agarwal, Anchal
2020-05-19 23:25 ` [PATCH 03/12] x86/xen: Introduce new function to map HYPERVISOR_shared_info on Resume Anchal Agarwal
2020-05-30 23:02 ` Boris Ostrovsky
2020-06-04 23:03 ` Anchal Agarwal
2020-06-05 21:39 ` Boris Ostrovsky
2020-06-08 16:52 ` Anchal Agarwal
2020-06-08 18:49 ` Boris Ostrovsky
2020-05-19 23:26 ` [PATCH 04/12] x86/xen: add system core suspend and resume callbacks Anchal Agarwal
2020-05-30 23:10 ` Boris Ostrovsky [this message]
2020-06-03 22:40 ` Agarwal, Anchal
2020-06-05 21:24 ` Boris Ostrovsky
2020-06-08 17:09 ` Anchal Agarwal
2020-05-19 23:26 ` [PATCH 05/12] genirq: Shutdown irq chips in suspend/resume during hibernation Anchal Agarwal
2020-05-19 23:29 ` Singh, Balbir
2020-05-19 23:36 ` Agarwal, Anchal
2020-05-19 23:34 ` Anchal Agarwal
2020-05-30 23:17 ` Boris Ostrovsky
2020-06-01 20:46 ` Agarwal, Anchal
2020-05-19 23:27 ` [PATCH 06/12] xen-blkfront: add callbacks for PM suspend and hibernation Anchal Agarwal
2020-05-20 5:00 ` kbuild test robot
2020-05-20 5:07 ` kbuild test robot
2020-05-21 23:48 ` Anchal Agarwal
2020-05-22 1:43 ` Singh, Balbir
2020-05-28 12:30 ` Roger Pau Monné
2020-05-19 23:28 ` [PATCH 07/12] xen-netfront: " Anchal Agarwal
2020-05-19 23:28 ` [PATCH 08/12] xen/time: introduce xen_{save,restore}_steal_clock Anchal Agarwal
2020-05-30 23:32 ` Boris Ostrovsky
2020-05-19 23:28 ` [PATCH 09/12] x86/xen: save and restore steal clock Anchal Agarwal
2020-05-30 23:44 ` Boris Ostrovsky
2020-06-04 18:33 ` Anchal Agarwal
2020-05-19 23:29 ` [PATCH 10/12] xen: Introduce wrapper for save/restore sched clock offset Anchal Agarwal
2020-05-19 23:29 ` [PATCH 11/12] xen: Update sched clock offset to avoid system instability in hibernation Anchal Agarwal
2020-05-19 23:29 ` [PATCH 12/12] PM / hibernate: update the resume offset on SNAPSHOT_SET_SWAP_AREA Anchal Agarwal
2020-05-28 17:59 ` [PATCH 00/12] Fix PM hibernation in Xen guests Agarwal, Anchal
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