diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 6571fbfdb2a1..78cdf6a637fc 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3675,7 +3675,11 @@ [KNL, SMP] Set scheduler's default relax_domain_level. See Documentation/cgroup-v1/cpusets.txt. - reserve= [KNL,BUGS] Force the kernel to ignore some iomem area + reserve= [KNL,BUGS] Force kernel to ignore I/O ports or memory + Format: ,[,,,...] + Reserve I/O ports or memory so the kernel won't use + them. If is less than 0x10000, the region + is assumed to be I/O ports; otherwise it is memory. reservetop= [X86-32] Format: nn[KMG] diff --git a/arch/alpha/kernel/console.c b/arch/alpha/kernel/console.c index 8e9a41966881..5476279329a6 100644 --- a/arch/alpha/kernel/console.c +++ b/arch/alpha/kernel/console.c @@ -21,6 +21,7 @@ struct pci_controller *pci_vga_hose; static struct resource alpha_vga = { .name = "alpha-vga+", + .flags = IORESOURCE_IO, .start = 0x3C0, .end = 0x3DF }; diff --git a/arch/arm/include/asm/pci.h b/arch/arm/include/asm/pci.h index 960d9dc4f380..1f0de808d111 100644 --- a/arch/arm/include/asm/pci.h +++ b/arch/arm/include/asm/pci.h @@ -10,10 +10,7 @@ extern unsigned long pcibios_min_io; extern unsigned long pcibios_min_mem; #define PCIBIOS_MIN_MEM pcibios_min_mem -static inline int pcibios_assign_all_busses(void) -{ - return pci_has_flag(PCI_REASSIGN_ALL_RSRC); -} +#define pcibios_assign_all_busses() pci_has_flag(PCI_REASSIGN_ALL_BUS) #ifdef CONFIG_PCI_DOMAINS static inline int pci_proc_domain(struct pci_bus *bus) diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index 0cd0aefb3a8f..ed46ca69813d 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -527,7 +527,7 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw) struct pci_sys_data *sys; LIST_HEAD(head); - pci_add_flags(PCI_REASSIGN_ALL_RSRC); + pci_add_flags(PCI_REASSIGN_ALL_BUS); if (hw->preinit) hw->preinit(); pcibios_init_hw(parent, hw, &head); diff --git a/arch/mips/jazz/setup.c b/arch/mips/jazz/setup.c index e4374a5651ce..448fd41792e4 100644 --- a/arch/mips/jazz/setup.c +++ b/arch/mips/jazz/setup.c @@ -32,22 +32,22 @@ static struct resource jazz_io_resources[] = { .start = 0x00, .end = 0x1f, .name = "dma1", - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .start = 0x40, .end = 0x5f, .name = "timer", - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .start = 0x80, .end = 0x8f, .name = "dma page reg", - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .start = 0xc0, .end = 0xdf, .name = "dma2", - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY } }; diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c index de34adb76157..7b63914d2e58 100644 --- a/arch/mips/mti-malta/malta-setup.c +++ b/arch/mips/mti-malta/malta-setup.c @@ -47,31 +47,31 @@ static struct resource standard_io_resources[] = { .name = "dma1", .start = 0x00, .end = 0x1f, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .name = "timer", .start = 0x40, .end = 0x5f, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .name = "keyboard", .start = 0x60, .end = 0x6f, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .name = "dma page reg", .start = 0x80, .end = 0x8f, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, { .name = "dma2", .start = 0xc0, .end = 0xdf, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }, }; diff --git a/arch/powerpc/platforms/maple/time.c b/arch/powerpc/platforms/maple/time.c index 81799d70a1ee..cfddc87f81bf 100644 --- a/arch/powerpc/platforms/maple/time.c +++ b/arch/powerpc/platforms/maple/time.c @@ -134,7 +134,7 @@ int maple_set_rtc_time(struct rtc_time *tm) static struct resource rtc_iores = { .name = "rtc", - .flags = IORESOURCE_BUSY, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, }; unsigned long __init maple_get_boot_time(void) diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c index bafb014e1a7e..cb9a8b71fd0f 100644 --- a/arch/powerpc/sysdev/i8259.c +++ b/arch/powerpc/sysdev/i8259.c @@ -145,21 +145,21 @@ static struct resource pic1_iores = { .name = "8259 (master)", .start = 0x20, .end = 0x21, - .flags = IORESOURCE_BUSY, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, }; static struct resource pic2_iores = { .name = "8259 (slave)", .start = 0xa0, .end = 0xa1, - .flags = IORESOURCE_BUSY, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, }; static struct resource pic_edgectrl_iores = { .name = "8259 edge control", .start = 0x4d0, .end = 0x4d1, - .flags = IORESOURCE_BUSY, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, }; static int i8259_host_match(struct irq_domain *h, struct device_node *node, diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c index 7aafbb091b67..b0d4aab1a58c 100644 --- a/drivers/irqchip/irq-i8259.c +++ b/drivers/irqchip/irq-i8259.c @@ -289,14 +289,14 @@ static struct resource pic1_io_resource = { .name = "pic1", .start = PIC_MASTER_CMD, .end = PIC_MASTER_IMR, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }; static struct resource pic2_io_resource = { .name = "pic2", .start = PIC_SLAVE_CMD, .end = PIC_SLAVE_IMR, - .flags = IORESOURCE_BUSY + .flags = IORESOURCE_IO | IORESOURCE_BUSY }; static int i8259A_irq_domain_map(struct irq_domain *d, unsigned int virq, diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c index 44a47d4f0b8f..c4b891c84703 100644 --- a/drivers/pci/host/pci-host-common.c +++ b/drivers/pci/host/pci-host-common.c @@ -142,7 +142,7 @@ int pci_host_common_probe(struct platform_device *pdev, /* Do not reassign resources if probe only */ if (!pci_has_flag(PCI_PROBE_ONLY)) - pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS); + pci_add_flags(PCI_REASSIGN_ALL_BUS); list_splice_init(&resources, &bridge->windows); bridge->dev.parent = dev; diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index f9d3960dc39f..67328a21d0ee 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -2382,7 +2382,6 @@ static int tegra_pcie_probe(struct platform_device *pdev) tegra_pcie_enable_ports(pcie); - pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS); host->busnr = pcie->busn.start; host->dev.parent = &pdev->dev; host->ops = &tegra_pcie_ops; diff --git a/drivers/pci/host/pci-versatile.c b/drivers/pci/host/pci-versatile.c index d417acab0ecf..2a2dfcd68e86 100644 --- a/drivers/pci/host/pci-versatile.c +++ b/drivers/pci/host/pci-versatile.c @@ -202,7 +202,7 @@ static int versatile_pci_probe(struct platform_device *pdev) writel(0, versatile_cfg_base[0] + PCI_INTERRUPT_LINE); pci_add_flags(PCI_ENABLE_PROC_DOMAINS); - pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC); + pci_add_flags(PCI_REASSIGN_ALL_BUS); list_splice_init(&pci_res, &bridge->windows); bridge->dev.parent = dev; diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 52ab3cb0a0bf..2ef5ff9cddf6 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -459,7 +459,7 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie) rcar_pcie_setup(&bridge->windows, pcie); - pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS); + pci_add_flags(PCI_REASSIGN_ALL_BUS); bridge->dev.parent = dev; bridge->sysdata = pcie; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index c7941a0512a5..7b282f4ba8dc 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1216,14 +1216,9 @@ static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr, if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start)) return -EINVAL; - if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) { - WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n", - current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff, - pci_name(pdev), bar, - (u64)pci_resource_start(pdev, bar), - (u64)pci_resource_len(pdev, bar)); + if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) return -EINVAL; - } + mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io; return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine); diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c index 61f9e8a5ea8b..2f8fcd9ba5c1 100644 --- a/drivers/pci/rom.c +++ b/drivers/pci/rom.c @@ -92,15 +92,15 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size) void __iomem *pds; /* Standard PCI ROMs start out with these bytes 55 AA */ if (readw(image) != 0xAA55) { - pci_err(pdev, "Invalid PCI ROM header signature: expecting 0xaa55, got %#06x\n", - readw(image)); + pci_info(pdev, "Invalid PCI ROM header signature: expecting 0xaa55, got %#06x\n", + readw(image)); break; } /* get the PCI data structure and check its "PCIR" signature */ pds = image + readw(image + 24); if (readl(pds) != 0x52494350) { - pci_err(pdev, "Invalid PCI ROM data signature: expecting 0x52494350, got %#010x\n", - readl(pds)); + pci_info(pdev, "Invalid PCI ROM data signature: expecting 0x52494350, got %#010x\n", + readl(pds)); break; } last_image = readb(pds + 21) & 0x80; diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 445b1dc5d441..a17ba1465815 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -422,7 +422,10 @@ static const char *vgacon_startup(void) vga_video_port_val = VGA_CRT_DM; if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { static struct resource ega_console_resource = - { .name = "ega", .start = 0x3B0, .end = 0x3BF }; + { .name = "ega", + .flags = IORESOURCE_IO, + .start = 0x3B0, + .end = 0x3BF }; vga_video_type = VIDEO_TYPE_EGAM; vga_vram_size = 0x8000; display_desc = "EGA+"; @@ -430,9 +433,15 @@ static const char *vgacon_startup(void) &ega_console_resource); } else { static struct resource mda1_console_resource = - { .name = "mda", .start = 0x3B0, .end = 0x3BB }; + { .name = "mda", + .flags = IORESOURCE_IO, + .start = 0x3B0, + .end = 0x3BB }; static struct resource mda2_console_resource = - { .name = "mda", .start = 0x3BF, .end = 0x3BF }; + { .name = "mda", + .flags = IORESOURCE_IO, + .start = 0x3BF, + .end = 0x3BF }; vga_video_type = VIDEO_TYPE_MDA; vga_vram_size = 0x2000; display_desc = "*MDA"; @@ -454,15 +463,21 @@ static const char *vgacon_startup(void) vga_vram_size = 0x8000; if (!screen_info.orig_video_isVGA) { - static struct resource ega_console_resource - = { .name = "ega", .start = 0x3C0, .end = 0x3DF }; + static struct resource ega_console_resource = + { .name = "ega", + .flags = IORESOURCE_IO, + .start = 0x3C0, + .end = 0x3DF }; vga_video_type = VIDEO_TYPE_EGAC; display_desc = "EGA"; request_resource(&ioport_resource, &ega_console_resource); } else { - static struct resource vga_console_resource - = { .name = "vga+", .start = 0x3C0, .end = 0x3DF }; + static struct resource vga_console_resource = + { .name = "vga+", + .flags = IORESOURCE_IO, + .start = 0x3C0, + .end = 0x3DF }; vga_video_type = VIDEO_TYPE_VGAC; display_desc = "VGA+"; request_resource(&ioport_resource, @@ -494,7 +509,10 @@ static const char *vgacon_startup(void) } } else { static struct resource cga_console_resource = - { .name = "cga", .start = 0x3D4, .end = 0x3D5 }; + { .name = "cga", + .flags = IORESOURCE_IO, + .start = 0x3D4, + .end = 0x3D5 }; vga_video_type = VIDEO_TYPE_CGA; vga_vram_size = 0x2000; display_desc = "*CGA"; diff --git a/kernel/resource.c b/kernel/resource.c index 54ba6de3757c..8c527d83ca76 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1022,6 +1022,7 @@ static void __init __reserve_region_with_split(struct resource *root, struct resource *conflict; struct resource *res = alloc_resource(GFP_ATOMIC); struct resource *next_res = NULL; + int type = resource_type(root); if (!res) return; @@ -1029,7 +1030,7 @@ static void __init __reserve_region_with_split(struct resource *root, res->name = name; res->start = start; res->end = end; - res->flags = IORESOURCE_BUSY; + res->flags = type | IORESOURCE_BUSY; res->desc = IORES_DESC_NONE; while (1) { @@ -1064,7 +1065,7 @@ static void __init __reserve_region_with_split(struct resource *root, next_res->name = name; next_res->start = conflict->end + 1; next_res->end = end; - next_res->flags = IORESOURCE_BUSY; + next_res->flags = type | IORESOURCE_BUSY; next_res->desc = IORES_DESC_NONE; } } else { @@ -1478,7 +1479,7 @@ void __devm_release_region(struct device *dev, struct resource *parent, EXPORT_SYMBOL(__devm_release_region); /* - * Called from init/main.c to reserve IO ports. + * Reserve I/O ports or memory based on "reserve=" kernel parameter. */ #define MAXRESERVE 4 static int __init reserve_setup(char *str) @@ -1489,26 +1490,38 @@ static int __init reserve_setup(char *str) for (;;) { unsigned int io_start, io_num; int x = reserved; + struct resource *parent; - if (get_option (&str, &io_start) != 2) + if (get_option(&str, &io_start) != 2) break; - if (get_option (&str, &io_num) == 0) + if (get_option(&str, &io_num) == 0) break; if (x < MAXRESERVE) { struct resource *res = reserve + x; + + /* + * If the region starts below 0x10000, we assume it's + * I/O port space; otherwise assume it's memory. + */ + if (io_start < 0x10000) { + res->flags = IORESOURCE_IO; + parent = &ioport_resource; + } else { + res->flags = IORESOURCE_MEM; + parent = &iomem_resource; + } res->name = "reserved"; res->start = io_start; res->end = io_start + io_num - 1; - res->flags = IORESOURCE_BUSY; + res->flags |= IORESOURCE_BUSY; res->desc = IORES_DESC_NONE; res->child = NULL; - if (request_resource(res->start >= 0x10000 ? &iomem_resource : &ioport_resource, res) == 0) + if (request_resource(parent, res) == 0) reserved = x+1; } } return 1; } - __setup("reserve=", reserve_setup); /*