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: [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) 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
WARNING: multiple messages have this Message-ID (diff)
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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
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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