Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
authorLinus Torvalds <torvalds@linux-foundation.org>
Fri, 9 Dec 2011 22:45:12 +0000 (14:45 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 9 Dec 2011 22:45:12 +0000 (14:45 -0800)
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, efi: Calling __pa() with an ioremap()ed address is invalid
  x86, hpet: Immediately disable HPET timer 1 if rtc irq is masked
  x86/intel_mid: Kconfig select fix
  x86/intel_mid: Fix the Kconfig for MID selection

arch/x86/Kconfig
arch/x86/include/asm/e820.h
arch/x86/include/asm/efi.h
arch/x86/kernel/e820.c
arch/x86/kernel/hpet.c
arch/x86/kernel/setup.c
arch/x86/platform/efi/efi.c
arch/x86/platform/efi/efi_64.c

index cb9a1044a771be75563305f8909097a67cd21778..efb42949cc09349e37246baa07f018648186386f 100644 (file)
@@ -390,7 +390,7 @@ config X86_INTEL_CE
          This option compiles in support for the CE4100 SOC for settop
          boxes and media devices.
 
-config X86_INTEL_MID
+config X86_WANT_INTEL_MID
        bool "Intel MID platform support"
        depends on X86_32
        depends on X86_EXTENDED_PLATFORM
@@ -399,7 +399,10 @@ config X86_INTEL_MID
          systems which do not have the PCI legacy interfaces (Moorestown,
          Medfield). If you are building for a PC class system say N here.
 
-if X86_INTEL_MID
+if X86_WANT_INTEL_MID
+
+config X86_INTEL_MID
+       bool
 
 config X86_MRST
        bool "Moorestown MID platform"
@@ -411,6 +414,7 @@ config X86_MRST
        select SPI
        select INTEL_SCU_IPC
        select X86_PLATFORM_DEVICES
+       select X86_INTEL_MID
        ---help---
          Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
          Internet Device(MID) platform. Moorestown consists of two chips:
index 908b96957d88adf11694f6e83652b47d06d3b8f0..c9547033e38e8fee78964ffda671d9e3402a4455 100644 (file)
  */
 #define E820_RESERVED_KERN        128
 
+/*
+ * Address ranges that need to be mapped by the kernel direct
+ * mapping. This is used to make sure regions such as
+ * EFI_RUNTIME_SERVICES_DATA are directly mapped. See setup_arch().
+ */
+#define E820_RESERVED_EFI         129
+
 #ifndef __ASSEMBLY__
 #include <linux/types.h>
 struct e820entry {
@@ -115,6 +122,7 @@ static inline void early_memtest(unsigned long start, unsigned long end)
 }
 #endif
 
+extern unsigned long e820_end_pfn(unsigned long limit_pfn, unsigned type);
 extern unsigned long e820_end_of_ram_pfn(void);
 extern unsigned long e820_end_of_low_ram_pfn(void);
 extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
index 7093e4a6a0bc6dd5644b2b14cbef9ef5f4085eef..b8d8bfcd44a95f48b15537b555636bbbb32c57b9 100644 (file)
@@ -33,8 +33,6 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
 #define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)      \
        efi_call_virt(f, a1, a2, a3, a4, a5, a6)
 
-#define efi_ioremap(addr, size, type)          ioremap_cache(addr, size)
-
 #else /* !CONFIG_X86_32 */
 
 extern u64 efi_call0(void *fp);
@@ -84,9 +82,6 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
        efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
                  (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
 
-extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
-                                u32 type);
-
 #endif /* CONFIG_X86_32 */
 
 extern int add_efi_memmap;
index 303a0e48f076feb3feb522d4052ac4b958995d42..65ffd110a81bc95491fb13ae7c87cd7be1738f93 100644 (file)
@@ -135,6 +135,7 @@ static void __init e820_print_type(u32 type)
                printk(KERN_CONT "(usable)");
                break;
        case E820_RESERVED:
+       case E820_RESERVED_EFI:
                printk(KERN_CONT "(reserved)");
                break;
        case E820_ACPI:
@@ -783,7 +784,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
 /*
  * Find the highest page frame number we have available
  */
-static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
+unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
 {
        int i;
        unsigned long last_pfn = 0;
index b946a9eac7d9f29fb6d955e3541bf03295612367..1bb0bf4d92cd8edf9d639ea5aabd08bc7efad892 100644 (file)
@@ -1049,6 +1049,14 @@ int hpet_rtc_timer_init(void)
 }
 EXPORT_SYMBOL_GPL(hpet_rtc_timer_init);
 
+static void hpet_disable_rtc_channel(void)
+{
+       unsigned long cfg;
+       cfg = hpet_readl(HPET_T1_CFG);
+       cfg &= ~HPET_TN_ENABLE;
+       hpet_writel(cfg, HPET_T1_CFG);
+}
+
 /*
  * The functions below are called from rtc driver.
  * Return 0 if HPET is not being used.
@@ -1060,6 +1068,9 @@ int hpet_mask_rtc_irq_bit(unsigned long bit_mask)
                return 0;
 
        hpet_rtc_flags &= ~bit_mask;
+       if (unlikely(!hpet_rtc_flags))
+               hpet_disable_rtc_channel();
+
        return 1;
 }
 EXPORT_SYMBOL_GPL(hpet_mask_rtc_irq_bit);
@@ -1125,15 +1136,11 @@ EXPORT_SYMBOL_GPL(hpet_rtc_dropped_irq);
 
 static void hpet_rtc_timer_reinit(void)
 {
-       unsigned int cfg, delta;
+       unsigned int delta;
        int lost_ints = -1;
 
-       if (unlikely(!hpet_rtc_flags)) {
-               cfg = hpet_readl(HPET_T1_CFG);
-               cfg &= ~HPET_TN_ENABLE;
-               hpet_writel(cfg, HPET_T1_CFG);
-               return;
-       }
+       if (unlikely(!hpet_rtc_flags))
+               hpet_disable_rtc_channel();
 
        if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
                delta = hpet_default_delta;
index cf0ef986cb6dff51348c17c691491f6f48c61a60..9a9e40fb091ccbf0c79885dbbfd7d2e64b125d45 100644 (file)
@@ -691,6 +691,8 @@ early_param("reservelow", parse_reservelow);
 
 void __init setup_arch(char **cmdline_p)
 {
+       unsigned long end_pfn;
+
 #ifdef CONFIG_X86_32
        memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
        visws_early_detect();
@@ -932,7 +934,24 @@ void __init setup_arch(char **cmdline_p)
        init_gbpages();
 
        /* max_pfn_mapped is updated here */
-       max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
+       end_pfn = max_low_pfn;
+
+#ifdef CONFIG_X86_64
+       /*
+        * There may be regions after the last E820_RAM region that we
+        * want to include in the kernel direct mapping, such as
+        * EFI_RUNTIME_SERVICES_DATA.
+        */
+       if (efi_enabled) {
+               unsigned long efi_end;
+
+               efi_end = e820_end_pfn(MAXMEM>>PAGE_SHIFT, E820_RESERVED_EFI);
+               if (efi_end > max_low_pfn)
+                       end_pfn = efi_end;
+       }
+#endif
+
+       max_low_pfn_mapped = init_memory_mapping(0, end_pfn << PAGE_SHIFT);
        max_pfn_mapped = max_low_pfn_mapped;
 
 #ifdef CONFIG_X86_64
index 37718f0f053d53346566c80958885f159b61dcde..c9718a16be158bfa994e774b1b1ad2dd079c68cb 100644 (file)
@@ -323,10 +323,13 @@ static void __init do_add_efi_memmap(void)
                case EFI_UNUSABLE_MEMORY:
                        e820_type = E820_UNUSABLE;
                        break;
+               case EFI_RUNTIME_SERVICES_DATA:
+                       e820_type = E820_RESERVED_EFI;
+                       break;
                default:
                        /*
                         * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
-                        * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
+                        * EFI_MEMORY_MAPPED_IO
                         * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
                         */
                        e820_type = E820_RESERVED;
@@ -671,10 +674,21 @@ void __init efi_enter_virtual_mode(void)
                end_pfn = PFN_UP(end);
                if (end_pfn <= max_low_pfn_mapped
                    || (end_pfn > (1UL << (32 - PAGE_SHIFT))
-                       && end_pfn <= max_pfn_mapped))
+                       && end_pfn <= max_pfn_mapped)) {
                        va = __va(md->phys_addr);
-               else
-                       va = efi_ioremap(md->phys_addr, size, md->type);
+
+                       if (!(md->attribute & EFI_MEMORY_WB)) {
+                               addr = (u64) (unsigned long)va;
+                               npages = md->num_pages;
+                               memrange_efi_to_native(&addr, &npages);
+                               set_memory_uc(addr, npages);
+                       }
+               } else {
+                       if (!(md->attribute & EFI_MEMORY_WB))
+                               va = ioremap_nocache(md->phys_addr, size);
+                       else
+                               va = ioremap_cache(md->phys_addr, size);
+               }
 
                md->virt_addr = (u64) (unsigned long) va;
 
@@ -684,13 +698,6 @@ void __init efi_enter_virtual_mode(void)
                        continue;
                }
 
-               if (!(md->attribute & EFI_MEMORY_WB)) {
-                       addr = md->virt_addr;
-                       npages = md->num_pages;
-                       memrange_efi_to_native(&addr, &npages);
-                       set_memory_uc(addr, npages);
-               }
-
                systab = (u64) (unsigned long) efi_phys.systab;
                if (md->phys_addr <= systab && systab < end) {
                        systab += md->virt_addr - md->phys_addr;
index ac3aa54e26546ba5cb4121eba0c58ca00f06ea82..312250c6b2de3078bc47562c6b3034e53e74e4f3 100644 (file)
@@ -80,20 +80,3 @@ void __init efi_call_phys_epilog(void)
        local_irq_restore(efi_flags);
        early_code_mapping_set_exec(0);
 }
-
-void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
-                                u32 type)
-{
-       unsigned long last_map_pfn;
-
-       if (type == EFI_MEMORY_MAPPED_IO)
-               return ioremap(phys_addr, size);
-
-       last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
-       if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) {
-               unsigned long top = last_map_pfn << PAGE_SHIFT;
-               efi_ioremap(top, size - (top - phys_addr), type);
-       }
-
-       return (void __iomem *)__va(phys_addr);
-}