uml: remove code made redundant by CHOOSE_MODE removal
This patch makes a number of simplifications enabled by the removal of
CHOOSE_MODE. There were lots of functions that looked like
int foo(args){
foo_skas(args);
}
The bodies of foo_skas are now folded into foo, and their declarations (and
sometimes entire header files) are deleted.
In addition, the union uml_pt_regs, which was a union between the tt and skas
register formats, is now a struct, with the tt-mode arm of the union being
removed.
It turns out that usr2_handler was unused, so it is gone.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 312e8ba..12b8c63 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -8,12 +8,12 @@
#include "asm/pgalloc.h"
#include "asm/pgtable.h"
#include "asm/tlbflush.h"
-#include "mode_kern.h"
#include "as-layout.h"
#include "tlb.h"
#include "mem.h"
#include "mem_user.h"
#include "os.h"
+#include "skas.h"
static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
unsigned int prot, struct host_vm_op *ops, int *index,
@@ -341,6 +341,71 @@
return(updated);
}
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ struct mm_struct *mm = vma->vm_mm;
+ void *flush = NULL;
+ int r, w, x, prot, err = 0;
+ struct mm_id *mm_id;
+
+ address &= PAGE_MASK;
+ pgd = pgd_offset(mm, address);
+ if(!pgd_present(*pgd))
+ goto kill;
+
+ pud = pud_offset(pgd, address);
+ if(!pud_present(*pud))
+ goto kill;
+
+ pmd = pmd_offset(pud, address);
+ if(!pmd_present(*pmd))
+ goto kill;
+
+ pte = pte_offset_kernel(pmd, address);
+
+ r = pte_read(*pte);
+ w = pte_write(*pte);
+ x = pte_exec(*pte);
+ if (!pte_young(*pte)) {
+ r = 0;
+ w = 0;
+ } else if (!pte_dirty(*pte)) {
+ w = 0;
+ }
+
+ mm_id = &mm->context.skas.id;
+ prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
+ (x ? UM_PROT_EXEC : 0));
+ if(pte_newpage(*pte)){
+ if(pte_present(*pte)){
+ unsigned long long offset;
+ int fd;
+
+ fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset);
+ err = map(mm_id, address, PAGE_SIZE, prot, fd, offset,
+ 1, &flush);
+ }
+ else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
+ }
+ else if(pte_newprot(*pte))
+ err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
+
+ if(err)
+ goto kill;
+
+ *pte = pte_mkuptodate(*pte);
+
+ return;
+
+kill:
+ printk("Failed to flush page for address 0x%lx\n", address);
+ force_sig(SIGKILL, current);
+}
+
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
{
return(pgd_offset(mm, address));
@@ -387,21 +452,80 @@
void __flush_tlb_one(unsigned long addr)
{
- __flush_tlb_one_skas(addr);
+ flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
+}
+
+static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
+ int finished, void **flush)
+{
+ struct host_vm_op *op;
+ int i, ret = 0;
+
+ for(i = 0; i <= last && !ret; i++){
+ op = &ops[i];
+ switch(op->type){
+ case MMAP:
+ ret = map(&mmu->skas.id, op->u.mmap.addr,
+ op->u.mmap.len, op->u.mmap.prot,
+ op->u.mmap.fd, op->u.mmap.offset, finished,
+ flush);
+ break;
+ case MUNMAP:
+ ret = unmap(&mmu->skas.id, op->u.munmap.addr,
+ op->u.munmap.len, finished, flush);
+ break;
+ case MPROTECT:
+ ret = protect(&mmu->skas.id, op->u.mprotect.addr,
+ op->u.mprotect.len, op->u.mprotect.prot,
+ finished, flush);
+ break;
+ default:
+ printk("Unknown op type %d in do_ops\n", op->type);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void fix_range(struct mm_struct *mm, unsigned long start_addr,
+ unsigned long end_addr, int force)
+{
+ if(!proc_mm && (end_addr > CONFIG_STUB_START))
+ end_addr = CONFIG_STUB_START;
+
+ fix_range_common(mm, start_addr, end_addr, force, do_ops);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
- flush_tlb_range_skas(vma, start, end);
+ if(vma->vm_mm == NULL)
+ flush_tlb_kernel_range_common(start, end);
+ else fix_range(vma->vm_mm, start, end, 0);
}
void flush_tlb_mm(struct mm_struct *mm)
{
- flush_tlb_mm_skas(mm);
+ unsigned long end;
+
+ /* Don't bother flushing if this address space is about to be
+ * destroyed.
+ */
+ if(atomic_read(&mm->mm_users) == 0)
+ return;
+
+ end = proc_mm ? task_size : CONFIG_STUB_START;
+ fix_range(mm, 0, end, 0);
}
void force_flush_all(void)
{
- force_flush_all_skas();
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma = mm->mmap;
+
+ while(vma != NULL) {
+ fix_range(mm, vma->vm_start, vma->vm_end, 1);
+ vma = vma->vm_next;
+ }
}