From: Julien Grall <julien.grall@citrix.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Julien Grall <julien.grall@citrix.com>
Cc: Russell King <linux@arm.linux.org.uk>, <ian.campbell@citrix.com>,
<tim@xen.org>, <linux-kernel@vger.kernel.org>,
<xen-devel@lists.xenproject.org>,
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC 23/23] arm/xen: Add support for 64KB page granularity
Date: Tue, 23 Jun 2015 15:37:33 +0100 [thread overview]
Message-ID: <55896F2D.5030405@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1506231508050.16917@kaball.uk.xensource.com>
Hi,
On 23/06/15 15:19, Stefano Stabellini wrote:
>> diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
>> index 224081c..dcfe251 100644
>> --- a/arch/arm/xen/enlighten.c
>> +++ b/arch/arm/xen/enlighten.c
>> @@ -93,8 +93,8 @@ static void xen_percpu_init(void)
>> pr_info("Xen: initializing cpu%d\n", cpu);
>> vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
>>
>> - info.mfn = __pa(vcpup) >> PAGE_SHIFT;
>> - info.offset = offset_in_page(vcpup);
>> + info.mfn = __pa(vcpup) >> XEN_PAGE_SHIFT;
>> + info.offset = xen_offset_in_page(vcpup);
>>
>> err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
>> BUG_ON(err);
>> @@ -204,7 +204,7 @@ static int __init xen_guest_init(void)
>> xatp.domid = DOMID_SELF;
>> xatp.idx = 0;
>> xatp.space = XENMAPSPACE_shared_info;
>> - xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT;
>> + xatp.gpfn = __pa(shared_info_page) >> XEN_PAGE_SHIFT;
>> if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
>> BUG();
>
> What about xen_remap_domain_mfn_range? I guess we don't support that use
> case on 64K guests? If so, I would appreaciate an assert and/or an error
> message.
The implementation of xen_remap_domain_mfn_range return -ENOSYS no
matter the page granularity.
This function is PV specific and has been added few months ago just for
a stub. See comment in the code:
"/* Not used by XENFEAT_auto_translated guests */"
Any logging/BUG_ON within this function is out of scope for this series.
And I don't think this will be really useful. Feel free to send a patch
for it.
Regards,
--
Julien Grall
next prev parent reply other threads:[~2015-06-23 14:38 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 17:00 [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest Julien Grall
2015-05-14 17:00 ` [RFC 01/23] xen: Include xen/page.h rather than asm/xen/page.h Julien Grall
2015-05-19 13:50 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 02/23] xen/xenbus: client: Fix call of virt_to_mfn in xenbus_grant_ring Julien Grall
2015-05-19 13:51 ` [Xen-devel] " David Vrabel
2015-05-19 14:12 ` Julien Grall
2015-05-14 17:00 ` [RFC 03/23] xen/grant-table: Remove unused macro SPP Julien Grall
2015-05-19 13:52 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 04/23] block/xen-blkfront: Remove unused macro MAXIMUM_OUTSTANDING_BLOCK_REQS Julien Grall
2015-05-20 14:36 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 05/23] block/xen-blkfront: Remove invalid comment Julien Grall
2015-05-20 14:42 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 06/23] block/xen-blkback: s/nr_pages/nr_segs/ Julien Grall
2015-05-20 14:54 ` Roger Pau Monné
2015-05-14 17:00 ` [RFC 07/23] net/xen-netfront: Correct printf format in xennet_get_responses Julien Grall
2015-05-19 13:53 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 08/23] net/xen-netback: Remove unused code in xenvif_rx_action Julien Grall
2015-05-15 0:26 ` Wei Liu
2015-05-14 17:00 ` [RFC 09/23] arm/xen: Drop duplicate define mfn_to_virt Julien Grall
2015-06-23 13:25 ` Stefano Stabellini
2015-06-23 13:53 ` [Xen-devel] " Julien Grall
2015-05-14 17:00 ` [RFC 10/23] xen/biomerge: WORKAROUND always says the biovec are not mergeable Julien Grall
2015-05-15 15:54 ` Boris Ostrovsky
2015-05-19 14:16 ` Julien Grall
2015-05-14 17:00 ` [RFC 11/23] xen: Add Xen specific page definition Julien Grall
2015-05-14 17:00 ` [RFC 12/23] xen: Extend page_to_mfn to take an offset in the page Julien Grall
2015-05-19 13:57 ` [Xen-devel] " David Vrabel
2015-05-19 14:18 ` Julien Grall
2015-05-14 17:00 ` [RFC 13/23] xen/xenbus: Use Xen page definition Julien Grall
2015-05-19 13:59 ` [Xen-devel] " David Vrabel
2015-05-19 14:19 ` Julien Grall
2015-05-14 17:00 ` [RFC 14/23] tty/hvc: xen: Use xen " Julien Grall
2015-05-14 17:00 ` [RFC 15/23] xen/balloon: Don't rely on the page granularity is the same for Xen and Linux Julien Grall
2015-05-19 15:23 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 16/23] xen/events: fifo: Make it running on 64KB granularity Julien Grall
2015-05-19 15:25 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 17/23] xen/grant-table: " Julien Grall
2015-05-19 15:27 ` [Xen-devel] " David Vrabel
2015-05-14 17:00 ` [RFC 18/23] block/xen-blkfront: Make it running on 64KB page granularity Julien Grall
2015-05-14 17:00 ` [RFC 19/23] block/xen-blkback: " Julien Grall
2015-05-14 17:01 ` [RFC 20/23] net/xen-netfront: " Julien Grall
2015-05-14 17:01 ` [RFC 21/23] net/xen-netback: " Julien Grall
2015-05-15 2:35 ` Wei Liu
2015-05-15 12:35 ` [Xen-devel] " Julien Grall
2015-05-15 15:31 ` Wei Liu
2015-05-15 15:41 ` Ian Campbell
2015-05-18 12:11 ` Julien Grall
2015-05-18 12:54 ` Wei Liu
2015-05-19 22:56 ` Julien Grall
2015-05-20 8:26 ` Wei Liu
2015-05-20 14:26 ` Julien Grall
2015-05-20 14:29 ` Julien Grall
2015-05-14 17:01 ` [RFC 22/23] xen/privcmd: Add support for Linux " Julien Grall
2015-05-19 15:39 ` [Xen-devel] " David Vrabel
2015-06-18 17:05 ` Julien Grall
2015-05-14 17:01 ` [RFC 23/23] arm/xen: Add support for " Julien Grall
2015-06-23 14:19 ` Stefano Stabellini
2015-06-23 14:37 ` Julien Grall [this message]
2015-06-23 14:49 ` Stefano Stabellini
2015-06-23 15:02 ` [Xen-devel] " Julien Grall
2015-06-23 16:12 ` Stefano Stabellini
2015-05-15 15:45 ` [Xen-devel] [RFC 00/23] arm64: Add support for 64KB page granularity in Xen guest David Vrabel
2015-05-15 15:51 ` Boris Ostrovsky
2015-05-18 12:23 ` Julien Grall
2015-06-23 13:37 ` Stefano Stabellini
2015-06-23 13:41 ` Stefano Stabellini
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