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From: Luca Fancellu <Luca.Fancellu@arm.com>
To: Julien Grall <julien@xen.org>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
	Julien Grall <jgrall@amazon.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Bertrand Marquis <Bertrand.Marquis@arm.com>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH 14/16] xen/arm64: mm: Add memory to the boot allocator first
Date: Thu, 26 May 2022 17:10:41 +0000	[thread overview]
Message-ID: <B43B0DE4-2D37-4A45-A68D-8172E98D2BB2@arm.com> (raw)
In-Reply-To: <20220520120937.28925-15-julien@xen.org>



> On 20 May 2022, at 13:09, Julien Grall <julien@xen.org> wrote:
> 
> From: Julien Grall <jgrall@amazon.com>
> 
> Currently, memory is added to the boot allocator after the xenheap
> mappings are done. This will break if the first mapping is more than
> 512GB of RAM.
> 
> In addition to that, a follow-up patch will rework setup_xenheap_mappings()
> to use smaller mappings (e.g. 2MB, 4KB). So it will be necessary to have
> memory in the boot allocator earlier.
> 
> Only free memory (e.g. not reserved or modules) can be added to the boot
> allocator. It might be possible that some regions (including the first
> one) will have no free memory.
> 
> So we need to add all the free memory to the boot allocator first
> and then add do the mappings.
> 
> Populating the boot allocator is nearly the same between arm32 and
> arm64. The only difference is on the former we need to exclude the
> xenheap for the boot allocator. Gate the difference with CONFIG_ARM_32
> so the code be re-used on arm64.
> 
> Signed-off-by: Julien Grall <jgrall@amazon.com>
> 

Hi Julien,

Seems ok to me!

Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>

I’ve also tested on arm64 patches until this one and no problem.

Tested-by: Luca Fancellu <luca.fancellu@arm.com>



  reply	other threads:[~2022-05-26 17:11 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20 12:09 [PATCH 00/16] xen/arm: mm: Remove open-coding mappings Julien Grall
2022-05-20 12:09 ` [PATCH 01/16] xen/arm: mm: Allow other mapping size in xen_pt_update_entry() Julien Grall
2022-06-03 22:27   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 02/16] xen/arm: mm: Add support for the contiguous bit Julien Grall
2022-05-20 12:09 ` [PATCH 03/16] xen/arm: mm: Avoid flushing the TLBs when mapping are inserted Julien Grall
2022-05-26 15:28   ` Luca Fancellu
2022-06-03 22:30   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 04/16] xen/arm: mm: Don't open-code Xen PT update in remove_early_mappings() Julien Grall
2022-06-03 22:31   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 05/16] xen/arm: mm: Re-implement early_fdt_map() using map_pages_to_xen() Julien Grall
2022-06-03 22:33   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 06/16] xen/arm32: mm: Re-implement setup_xenheap_mappings() " Julien Grall
2022-05-20 12:09 ` [PATCH 07/16] xen/arm: mm: Allocate xen page tables in domheap rather than xenheap Julien Grall
2022-05-20 12:09 ` [PATCH 08/16] xen/arm: mm: Allow page-table allocation from the boot allocator Julien Grall
2022-05-20 12:09 ` [PATCH 09/16] xen/arm: Move fixmap definitions in a separate header Julien Grall
2022-06-08  1:08   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 10/16] xen/arm: add Persistent Map (PMAP) infrastructure Julien Grall
2022-05-21 11:38   ` Julien Grall
2022-05-24  2:11   ` Wei Chen
2022-05-24  8:58     ` Julien Grall
2022-05-26 15:55   ` Luca Fancellu
2022-06-08  1:08   ` Stefano Stabellini
2022-06-08 10:01     ` Julien Grall
2022-06-09  0:25       ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 11/16] xen/arm: mm: Clean-up the includes and order them Julien Grall
2022-05-20 12:09 ` [PATCH 12/16] xen/arm: mm: Use the PMAP helpers in xen_{,un}map_table() Julien Grall
2022-05-20 12:09 ` [PATCH 13/16] xen/arm32: setup: Move out the code to populate the boot allocator Julien Grall
2022-05-23  7:28   ` Michal Orzel
2022-05-23 19:51     ` Julien Grall
2022-05-24  6:12       ` Michal Orzel
2022-05-24  7:57   ` Bertrand Marquis
2022-06-03 23:09   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 14/16] xen/arm64: mm: Add memory to the boot allocator first Julien Grall
2022-05-26 17:10   ` Luca Fancellu [this message]
2022-06-03 23:09   ` Stefano Stabellini
2022-05-20 12:09 ` [PATCH 15/16] xen/arm: mm: Rework setup_xenheap_mappings() Julien Grall
2022-05-20 12:09 ` [PATCH 16/16] xen/arm: mm: Re-implement setup_frame_table_mappings() with map_pages_to_xen() Julien Grall
2022-05-26 17:24   ` Luca Fancellu
2022-06-03 23:09   ` Stefano Stabellini
2022-06-08  1:14   ` Stefano Stabellini
2022-06-11 11:30 ` [PATCH 00/16] xen/arm: mm: Remove open-coding mappings Julien Grall

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