Merge branch 'linus' into core/softlockup

[mirror_ubuntu-hirsute-kernel.git] / arch / x86 / mm / pgtable_32.c

diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 3f97c3c87288c3afee83609af3f80d8bd04f4e27..b4becbf8c570cfae3d140cbceef0cb74ac7fa2a3 100644 (file)
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -71,7 +71,7 @@ void show_mem(void)
  * Associate a virtual page frame with a given physical page frame 
  * and protection flags for that frame.
  */ 
-static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
+void set_pte_vaddr(unsigned long vaddr, pte_t pteval)
 {
        pgd_t *pgd;
        pud_t *pud;
@@ -94,8 +94,8 @@ static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
                return;
        }
        pte = pte_offset_kernel(pmd, vaddr);
-       if (pgprot_val(flags))
-               set_pte_present(&init_mm, vaddr, pte, pfn_pte(pfn, flags));
+       if (pte_val(pteval))
+               set_pte_present(&init_mm, vaddr, pte, pteval);
        else
                pte_clear(&init_mm, vaddr, pte);
 
@@ -141,7 +141,6 @@ void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
        __flush_tlb_one(vaddr);
 }
 
-static int fixmaps;
 unsigned long __FIXADDR_TOP = 0xfffff000;
 EXPORT_SYMBOL(__FIXADDR_TOP);
 
@@ -152,7 +151,7 @@ EXPORT_SYMBOL(__FIXADDR_TOP);
  * Can be used to relocate the fixmap area and poke a hole in the top
  * of kernel address space to make room for a hypervisor.
  */
-void reserve_top_address(unsigned long reserve)
+void __init reserve_top_address(unsigned long reserve)
 {
        BUG_ON(fixmaps_set > 0);
        printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
@@ -160,3 +159,36 @@ void reserve_top_address(unsigned long reserve)
        __FIXADDR_TOP = -reserve - PAGE_SIZE;
        __VMALLOC_RESERVE += reserve;
 }
+
+/*
+ * vmalloc=size forces the vmalloc area to be exactly 'size'
+ * bytes. This can be used to increase (or decrease) the
+ * vmalloc area - the default is 128m.
+ */
+static int __init parse_vmalloc(char *arg)
+{
+       if (!arg)
+               return -EINVAL;
+
+       __VMALLOC_RESERVE = memparse(arg, &arg);
+       return 0;
+}
+early_param("vmalloc", parse_vmalloc);
+
+/*
+ * reservetop=size reserves a hole at the top of the kernel address space which
+ * a hypervisor can load into later.  Needed for dynamically loaded hypervisors,
+ * so relocating the fixmap can be done before paging initialization.
+ */
+static int __init parse_reservetop(char *arg)
+{
+       unsigned long address;
+
+       if (!arg)
+               return -EINVAL;
+
+       address = memparse(arg, &arg);
+       reserve_top_address(address);
+       return 0;
+}
+early_param("reservetop", parse_reservetop);