Re: [PATCH v3 06/17] arch: Set IORESOURCE_SYSTEM_RAM to System RAM

From: Borislav Petkov
Date: Sun Jan 24 2016 - 13:02:29 EST

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Adding the respective arch MLs to CC, as an FYI.

On Tue, Jan 05, 2016 at 11:54:30AM -0700, Toshi Kani wrote:
> Set IORESOURCE_SYSTEM_RAM to 'flags' of resource ranges with
> "System RAM", "Kernel code", "Kernel data", and "Kernel bss".
>
> Note that:
> - IORESOURCE_SYSRAM (i.e. modifier bit) is set to 'flags'
> when IORESOURCE_MEM is already set. IORESOURCE_SYSTEM_RAM
> is defined as (IORESOURCE_MEM|IORESOURCE_SYSRAM).
> - Some archs do not set 'flags' for children nodes, such as
> "Kernel code". This patch does not change 'flags' in this
> case.
>
> Cc: linux-arch@xxxxxxxxxxxxxxx
> Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
> ---
> arch/arm/kernel/setup.c | 6 +++---
> arch/arm64/kernel/setup.c | 6 +++---
> arch/avr32/kernel/setup.c | 6 +++---
> arch/m32r/kernel/setup.c | 4 ++--
> arch/mips/kernel/setup.c | 10 ++++++----
> arch/parisc/mm/init.c | 6 +++---
> arch/powerpc/mm/mem.c | 2 +-
> arch/s390/kernel/setup.c | 8 ++++----
> arch/score/kernel/setup.c | 2 +-
> arch/sh/kernel/setup.c | 8 ++++----
> arch/sparc/mm/init_64.c | 8 ++++----
> arch/tile/kernel/setup.c | 11 ++++++++---
> arch/unicore32/kernel/setup.c | 6 +++---
> 13 files changed, 45 insertions(+), 38 deletions(-)
>
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 20edd34..ae44e09 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -173,13 +173,13 @@ static struct resource mem_res[] = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> },
> {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> }
> };
>
> @@ -781,7 +781,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
> res->name = "System RAM";
> res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
> res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
>
> request_resource(&iomem_resource, res);
>
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index 8119479..450987d 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -73,13 +73,13 @@ static struct resource mem_res[] = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> },
> {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> }
> };
>
> @@ -210,7 +210,7 @@ static void __init request_standard_resources(void)
> res->name = "System RAM";
> res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
> res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
>
> request_resource(&iomem_resource, res);
>
> diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c
> index 209ae5a..e692889 100644
> --- a/arch/avr32/kernel/setup.c
> +++ b/arch/avr32/kernel/setup.c
> @@ -49,13 +49,13 @@ static struct resource __initdata kernel_data = {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM,
> + .flags = IORESOURCE_SYSTEM_RAM,
> };
> static struct resource __initdata kernel_code = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM,
> + .flags = IORESOURCE_SYSTEM_RAM,
> .sibling = &kernel_data,
> };
>
> @@ -134,7 +134,7 @@ add_physical_memory(resource_size_t start, resource_size_t end)
> new->start = start;
> new->end = end;
> new->name = "System RAM";
> - new->flags = IORESOURCE_MEM;
> + new->flags = IORESOURCE_SYSTEM_RAM;
>
> *pprev = new;
> }
> diff --git a/arch/m32r/kernel/setup.c b/arch/m32r/kernel/setup.c
> index 0392112..5f62ff0 100644
> --- a/arch/m32r/kernel/setup.c
> +++ b/arch/m32r/kernel/setup.c
> @@ -70,14 +70,14 @@ static struct resource data_resource = {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> static struct resource code_resource = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> unsigned long memory_start;
> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> index 66aac55..c385af1 100644
> --- a/arch/mips/kernel/setup.c
> +++ b/arch/mips/kernel/setup.c
> @@ -732,21 +732,23 @@ static void __init resource_init(void)
> end = HIGHMEM_START - 1;
>
> res = alloc_bootmem(sizeof(struct resource));
> +
> + res->start = start;
> + res->end = end;
> + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> +
> switch (boot_mem_map.map[i].type) {
> case BOOT_MEM_RAM:
> case BOOT_MEM_INIT_RAM:
> case BOOT_MEM_ROM_DATA:
> res->name = "System RAM";
> + res->flags |= IORESOURCE_SYSRAM;
> break;
> case BOOT_MEM_RESERVED:
> default:
> res->name = "reserved";
> }
>
> - res->start = start;
> - res->end = end;
> -
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> request_resource(&iomem_resource, res);
>
> /*
> diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
> index 1b366c4..3c07d6b 100644
> --- a/arch/parisc/mm/init.c
> +++ b/arch/parisc/mm/init.c
> @@ -55,12 +55,12 @@ signed char pfnnid_map[PFNNID_MAP_MAX] __read_mostly;
>
> static struct resource data_resource = {
> .name = "Kernel data",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource code_resource = {
> .name = "Kernel code",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource pdcdata_resource = {
> @@ -201,7 +201,7 @@ static void __init setup_bootmem(void)
> res->name = "System RAM";
> res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT;
> res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> request_resource(&iomem_resource, res);
> }
>
> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index 22d94c3..e78a2b7 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -541,7 +541,7 @@ static int __init add_system_ram_resources(void)
> res->name = "System RAM";
> res->start = base;
> res->end = base + size - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> WARN_ON(request_resource(&iomem_resource, res) < 0);
> }
> }
> diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
> index c837bca..b65a883 100644
> --- a/arch/s390/kernel/setup.c
> +++ b/arch/s390/kernel/setup.c
> @@ -376,17 +376,17 @@ static void __init setup_lowcore(void)
>
> static struct resource code_resource = {
> .name = "Kernel code",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource data_resource = {
> .name = "Kernel data",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource bss_resource = {
> .name = "Kernel bss",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource __initdata *standard_resources[] = {
> @@ -410,7 +410,7 @@ static void __init setup_resources(void)
>
> for_each_memblock(memory, reg) {
> res = alloc_bootmem_low(sizeof(*res));
> - res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
> + res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
>
> res->name = "System RAM";
> res->start = reg->base;
> diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
> index b48459a..f3a0649 100644
> --- a/arch/score/kernel/setup.c
> +++ b/arch/score/kernel/setup.c
> @@ -101,7 +101,7 @@ static void __init resource_init(void)
> res->name = "System RAM";
> res->start = MEMORY_START;
> res->end = MEMORY_START + MEMORY_SIZE - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> request_resource(&iomem_resource, res);
>
> request_resource(res, &code_resource);
> diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
> index de19cfa..3f1c18b 100644
> --- a/arch/sh/kernel/setup.c
> +++ b/arch/sh/kernel/setup.c
> @@ -78,17 +78,17 @@ static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
>
> static struct resource code_resource = {
> .name = "Kernel code",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource data_resource = {
> .name = "Kernel data",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> static struct resource bss_resource = {
> .name = "Kernel bss",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
> };
>
> unsigned long memory_start;
> @@ -202,7 +202,7 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
> res->name = "System RAM";
> res->start = start;
> res->end = end - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
>
> if (request_resource(&iomem_resource, res)) {
> pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
> diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
> index 3025bd5..a02d43d 100644
> --- a/arch/sparc/mm/init_64.c
> +++ b/arch/sparc/mm/init_64.c
> @@ -2862,17 +2862,17 @@ void hugetlb_setup(struct pt_regs *regs)
>
> static struct resource code_resource = {
> .name = "Kernel code",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> static struct resource data_resource = {
> .name = "Kernel data",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> static struct resource bss_resource = {
> .name = "Kernel bss",
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> static inline resource_size_t compute_kern_paddr(void *addr)
> @@ -2908,7 +2908,7 @@ static int __init report_memory(void)
> res->name = "System RAM";
> res->start = pavail[i].phys_addr;
> res->end = pavail[i].phys_addr + pavail[i].reg_size - 1;
> - res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
> + res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
>
> if (insert_resource(&iomem_resource, res) < 0) {
> pr_warn("Resource insertion failed.\n");
> diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
> index 6b755d1..6606fe2 100644
> --- a/arch/tile/kernel/setup.c
> +++ b/arch/tile/kernel/setup.c
> @@ -1632,14 +1632,14 @@ static struct resource data_resource = {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> static struct resource code_resource = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_BUSY | IORESOURCE_MEM
> + .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
> };
>
> /*
> @@ -1673,10 +1673,15 @@ insert_ram_resource(u64 start_pfn, u64 end_pfn, bool reserved)
> kzalloc(sizeof(struct resource), GFP_ATOMIC);
> if (!res)
> return NULL;
> - res->name = reserved ? "Reserved" : "System RAM";
> res->start = start_pfn << PAGE_SHIFT;
> res->end = (end_pfn << PAGE_SHIFT) - 1;
> res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
> + if (reserved) {
> + res->name = "Reserved";
> + } else {
> + res->name = "System RAM";
> + res->flags |= IORESOURCE_SYSRAM;
> + }
> if (insert_resource(&iomem_resource, res)) {
> kfree(res);
> return NULL;
> diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c
> index 3fa317f..c2bffa5 100644
> --- a/arch/unicore32/kernel/setup.c
> +++ b/arch/unicore32/kernel/setup.c
> @@ -72,13 +72,13 @@ static struct resource mem_res[] = {
> .name = "Kernel code",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> },
> {
> .name = "Kernel data",
> .start = 0,
> .end = 0,
> - .flags = IORESOURCE_MEM
> + .flags = IORESOURCE_SYSTEM_RAM
> }
> };
>
> @@ -211,7 +211,7 @@ request_standard_resources(struct meminfo *mi)
> res->name = "System RAM";
> res->start = mi->bank[i].start;
> res->end = mi->bank[i].start + mi->bank[i].size - 1;
> - res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
>
> request_resource(&iomem_resource, res);
>
>

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.

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