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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-08-09 13:02:50 -0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-08-09 13:04:08 -0400
commit10fe570fc16721d78afdba9689720094527c1ba3 (patch)
tree224d7b192039b1f0d24d1036269e44cf88b42f16 /arch/x86/xen
parent322a8b034003c0d46d39af85bf24fee27b902f48 (diff)
downloadlinux-10fe570fc16721d78afdba9689720094527c1ba3.tar.bz2
Revert "xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set."
We don' use it anymore and there are more false positives. This reverts commit fc25151d9ac7d809239fe68de0a1490b504bb94a. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/Kconfig8
-rw-r--r--arch/x86/xen/mmu.c38
2 files changed, 0 insertions, 46 deletions
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 5cc821cb2e09..ae559fe91c25 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -49,11 +49,3 @@ config XEN_DEBUG_FS
help
Enable statistics output and various tuning options in debugfs.
Enabling this option may incur a significant performance overhead.
-
-config XEN_DEBUG
- bool "Enable Xen debug checks"
- depends on XEN
- default n
- help
- Enable various WARN_ON checks in the Xen MMU code.
- Enabling this option WILL incur a significant performance overhead.
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f987bde77c49..3c9aecd09ed1 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -495,41 +495,6 @@ static pte_t xen_make_pte(pteval_t pte)
}
PV_CALLEE_SAVE_REGS_THUNK(xen_make_pte);
-#ifdef CONFIG_XEN_DEBUG
-pte_t xen_make_pte_debug(pteval_t pte)
-{
- phys_addr_t addr = (pte & PTE_PFN_MASK);
- phys_addr_t other_addr;
- bool io_page = false;
- pte_t _pte;
-
- if (pte & _PAGE_IOMAP)
- io_page = true;
-
- _pte = xen_make_pte(pte);
-
- if (!addr)
- return _pte;
-
- if (io_page &&
- (xen_initial_domain() || addr >= ISA_END_ADDRESS)) {
- other_addr = pfn_to_mfn(addr >> PAGE_SHIFT) << PAGE_SHIFT;
- WARN_ONCE(addr != other_addr,
- "0x%lx is using VM_IO, but it is 0x%lx!\n",
- (unsigned long)addr, (unsigned long)other_addr);
- } else {
- pteval_t iomap_set = (_pte.pte & PTE_FLAGS_MASK) & _PAGE_IOMAP;
- other_addr = (_pte.pte & PTE_PFN_MASK);
- WARN_ONCE((addr == other_addr) && (!io_page) && (!iomap_set),
- "0x%lx is missing VM_IO (and wasn't fixed)!\n",
- (unsigned long)addr);
- }
-
- return _pte;
-}
-PV_CALLEE_SAVE_REGS_THUNK(xen_make_pte_debug);
-#endif
-
static pgd_t xen_make_pgd(pgdval_t pgd)
{
pgd = pte_pfn_to_mfn(pgd);
@@ -1988,9 +1953,6 @@ void __init xen_ident_map_ISA(void)
static void __init xen_post_allocator_init(void)
{
-#ifdef CONFIG_XEN_DEBUG
- pv_mmu_ops.make_pte = PV_CALLEE_SAVE(xen_make_pte_debug);
-#endif
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;