From: Julien Grall <julien.grall@arm.com>
To: Stefano Stabellini <sstabellini@kernel.org>,
xen-devel@lists.xenproject.org
Cc: Stefano Stabellini <stefanos@xilinx.com>
Subject: Re: [Xen-devel] [PATCH v2 08/10] xen/arm: keep track of reserved-memory regions
Date: Tue, 7 May 2019 18:21:02 +0100 [thread overview]
Message-ID: <64029b1d-73dd-82de-a83e-0116c991606b@arm.com> (raw)
Message-ID: <20190507172102.Bu4pzF2eD3kug3fK7pnZbaN7Pa2UFheOQabqVud_II4@z> (raw)
In-Reply-To: <1556658172-8824-8-git-send-email-sstabellini@kernel.org>
Hi,
Some more review on this patch.
On 4/30/19 10:02 PM, Stefano Stabellini wrote:
> As we parse the device tree in Xen, keep track of the reserved-memory
> regions as they need special treatment (follow-up patches will make use
> of the stored information.)
>
> Reuse process_memory_node to add reserved-memory regions to the
> bootinfo.reserved_mem array. Remove the warning if there is no reg in
> process_memory_node because it is a normal condition for
> reserved-memory.
>
> Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
>
> ---
>
> Not done: create an e820-like structure on ARM.
>
> Changes in v2:
> - call process_memory_node from process_reserved_memory_node to avoid
> duplication
> ---
> xen/arch/arm/bootfdt.c | 30 ++++++++++++++++++++++--------
> xen/include/asm-arm/setup.h | 1 +
> 2 files changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
> index b6600ab..9355a6e 100644
> --- a/xen/arch/arm/bootfdt.c
> +++ b/xen/arch/arm/bootfdt.c
> @@ -135,6 +135,8 @@ static int __init process_memory_node(const void *fdt, int node,
> const __be32 *cell;
> paddr_t start, size;
> u32 reg_cells = address_cells + size_cells;
> + struct meminfo *mem;
> + bool reserved = (bool)data;
>
> if ( address_cells < 1 || size_cells < 1 )
> {
> @@ -143,29 +145,39 @@ static int __init process_memory_node(const void *fdt, int node,
> return 0;
> }
>
> + if ( reserved )
> + mem = &bootinfo.reserved_mem;
> + else
> + mem = &bootinfo.mem;
> +
> prop = fdt_get_property(fdt, node, "reg", NULL);
> if ( !prop )
> - {
> - printk("fdt: node `%s': missing `reg' property\n", name);
> return 0;
> - }
>
> cell = (const __be32 *)prop->data;
> banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32));
>
> - for ( i = 0; i < banks && bootinfo.mem.nr_banks < NR_MEM_BANKS; i++ )
> + for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ )
> {
> device_tree_get_reg(&cell, address_cells, size_cells, &start, &size);
> if ( !size )
> continue;
> - bootinfo.mem.bank[bootinfo.mem.nr_banks].start = start;
> - bootinfo.mem.bank[bootinfo.mem.nr_banks].size = size;
> - bootinfo.mem.nr_banks++;
> + mem->bank[mem->nr_banks].start = start;
> + mem->bank[mem->nr_banks].size = size;
> + mem->nr_banks++;
> }
>
> return 0;
> }
>
> +static int __init process_reserved_memory_node(const void *fdt, int node,
> + const char *name, int depth,
> + u32 address_cells, u32 size_cells)
> +{
> + device_tree_for_each_node(fdt, node, depth, process_memory_node, (void*)true);
> + return 0;
> +}
> +
> static void __init process_multiboot_node(const void *fdt, int node,
> const char *name,
> u32 address_cells, u32 size_cells)
> @@ -297,7 +309,9 @@ static int __init early_scan_node(const void *fdt,
> {
> if ( device_tree_node_matches(fdt, node, "memory") )
> process_memory_node(fdt, node, name, depth, address_cells, size_cells,
> - NULL);
> + (void*)false);
> + else if ( device_tree_node_matches(fdt, node, "reserved-memory") )
> + process_reserved_memory_node(fdt, node, name, depth, address_cells, size_cells);
This will match reserved-memory@... or even /foo/reserved-memory. Here,
we only want to match /reserved-memory.
> else if ( depth <= 3 && (device_tree_node_compatible(fdt, node, "xen,multiboot-module" ) ||
> device_tree_node_compatible(fdt, node, "multiboot,module" )))
> process_multiboot_node(fdt, node, name, address_cells, size_cells);
> diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h
> index 48187e1..5c3fc2d 100644
> --- a/xen/include/asm-arm/setup.h
> +++ b/xen/include/asm-arm/setup.h
> @@ -66,6 +66,7 @@ struct bootcmdlines {
>
> struct bootinfo {
> struct meminfo mem;
> + struct meminfo reserved_mem;
> struct bootmodules modules;
> struct bootcmdlines cmdlines;
> #ifdef CONFIG_ACPI
>
Cheers,
--
Julien Grall
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Xen-devel@lists.xenproject.org
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next prev parent reply other threads:[~2019-05-07 17:21 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 21:02 [PATCH v2 0/10] iomem memory policy Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-04-30 21:02 ` [PATCH v2 01/10] xen: add a p2mt parameter to map_mmio_regions Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-02 14:59 ` Jan Beulich
2019-05-02 14:59 ` [Xen-devel] " Jan Beulich
2019-05-02 18:49 ` Stefano Stabellini
2019-05-02 18:49 ` [Xen-devel] " Stefano Stabellini
2019-05-15 13:39 ` Oleksandr
2019-05-15 13:39 ` [Xen-devel] " Oleksandr
2019-04-30 21:02 ` [PATCH v2 02/10] xen: rename un/map_mmio_regions to un/map_regions Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-01 9:22 ` Julien Grall
2019-05-01 9:22 ` [Xen-devel] " Julien Grall
2019-06-17 21:24 ` Stefano Stabellini
2019-06-18 11:05 ` Julien Grall
2019-06-18 20:19 ` Stefano Stabellini
2019-05-02 15:03 ` Jan Beulich
2019-05-02 15:03 ` [Xen-devel] " Jan Beulich
2019-05-02 18:55 ` Stefano Stabellini
2019-05-02 18:55 ` [Xen-devel] " Stefano Stabellini
2019-04-30 21:02 ` [PATCH v2 03/10] xen: extend XEN_DOMCTL_memory_mapping to handle memory policy Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-02 15:12 ` Jan Beulich
2019-05-02 15:12 ` [Xen-devel] " Jan Beulich
2019-06-17 21:28 ` Stefano Stabellini
2019-06-18 8:59 ` Jan Beulich
2019-06-18 20:32 ` Stefano Stabellini
2019-06-18 23:15 ` Stefano Stabellini
2019-06-19 6:53 ` Jan Beulich
2019-05-07 16:41 ` Julien Grall
2019-05-07 16:41 ` [Xen-devel] " Julien Grall
2019-06-17 22:43 ` Stefano Stabellini
2019-06-18 11:13 ` Julien Grall
2019-05-15 14:40 ` Oleksandr
2019-05-15 14:40 ` [Xen-devel] " Oleksandr
2019-04-30 21:02 ` [PATCH v2 04/10] libxc: introduce xc_domain_mem_map_policy Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-04-30 21:02 ` [PATCH v2 05/10] libxl/xl: add memory policy option to iomem Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-01 9:42 ` Julien Grall
2019-05-01 9:42 ` [Xen-devel] " Julien Grall
2019-06-17 22:32 ` Stefano Stabellini
2019-06-18 11:09 ` Julien Grall
2019-06-18 11:15 ` Julien Grall
2019-06-18 22:07 ` Stefano Stabellini
2019-06-18 22:20 ` Julien Grall
2019-06-18 22:46 ` Stefano Stabellini
2019-04-30 21:02 ` [PATCH v2 06/10] xen/arm: extend device_tree_for_each_node Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-07 17:12 ` Julien Grall
2019-05-07 17:12 ` [Xen-devel] " Julien Grall
2019-04-30 21:02 ` [PATCH v2 07/10] xen/arm: make process_memory_node a device_tree_node_func Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-01 9:47 ` Julien Grall
2019-05-01 9:47 ` [Xen-devel] " Julien Grall
2019-04-30 21:02 ` [PATCH v2 08/10] xen/arm: keep track of reserved-memory regions Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-01 10:03 ` Julien Grall
2019-05-01 10:03 ` [Xen-devel] " Julien Grall
2019-06-21 23:47 ` Stefano Stabellini
2019-05-07 17:21 ` Julien Grall [this message]
2019-05-07 17:21 ` Julien Grall
2019-04-30 21:02 ` [PATCH v2 09/10] xen/arm: map reserved-memory regions as normal memory in dom0 Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-07 19:52 ` Julien Grall
2019-05-07 19:52 ` [Xen-devel] " Julien Grall
2019-04-30 21:02 ` [PATCH v2 10/10] xen/arm: add reserved-memory regions to the dom0 memory node Stefano Stabellini
2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini
2019-05-07 20:15 ` Julien Grall
2019-05-07 20:15 ` [Xen-devel] " Julien Grall
2019-05-10 20:51 ` Stefano Stabellini
2019-05-10 20:51 ` [Xen-devel] " Stefano Stabellini
2019-05-10 21:43 ` Julien Grall
2019-05-10 21:43 ` [Xen-devel] " Julien Grall
2019-05-11 12:40 ` Julien Grall
2019-05-11 12:40 ` [Xen-devel] " Julien Grall
2019-05-20 21:26 ` Stefano Stabellini
2019-05-20 21:26 ` [Xen-devel] " Stefano Stabellini
2019-05-20 22:38 ` Julien Grall
2019-05-20 22:38 ` [Xen-devel] " Julien Grall
2019-06-05 16:30 ` Julien Grall
2019-06-21 23:47 ` Stefano Stabellini
2019-05-16 16:52 ` [PATCH v2 0/10] iomem memory policy Oleksandr
2019-05-16 16:52 ` [Xen-devel] " Oleksandr
2019-06-21 23:48 ` Stefano Stabellini
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