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xen-devel
[Xen-devel] [PATCH 05/24] xen: clean up xen_load_gdt
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Makes the logic a bit clearer.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
arch/x86/xen/enlighten.c | 15 +++++++++++++--
1 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 70b355d..5776dc2 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -301,10 +301,21 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
frames = mcs.args;
for (f = 0; va < dtr->address + size; va += PAGE_SIZE, f++) {
- frames[f] = arbitrary_virt_to_mfn((void *)va);
+ int level;
+ pte_t *ptep = lookup_address(va, &level);
+ unsigned long pfn, mfn;
+ void *virt;
+
+ BUG_ON(ptep == NULL);
+
+ pfn = pte_pfn(*ptep);
+ mfn = pfn_to_mfn(pfn);
+ virt = __va(PFN_PHYS(pfn));
+
+ frames[f] = mfn;
make_lowmem_page_readonly((void *)va);
- make_lowmem_page_readonly(mfn_to_virt(frames[f]));
+ make_lowmem_page_readonly(virt);
}
MULTI_set_gdt(mcs.mc, frames, size / sizeof(struct desc_struct));
--
1.6.0.6
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- [Xen-devel] [GIT PULL] 2.6.30 Xen core updates, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 02/24] xen: separate p2m allocation from setting, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 01/24] xen: disable preempt for leave_lazy_mmu, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 04/24] xen: split construction of p2m mfn tables from registration, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 03/24] xen: dynamically allocate p2m tables, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 06/24] xen: make xen_load_gdt simpler, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 07/24] xen: remove xen_load_gdt debug, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 05/24] xen: clean up xen_load_gdt,
Jeremy Fitzhardinge <=
- [Xen-devel] [PATCH 12/24] x86-64: remove PGE from must-have feature list, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 08/24] xen: reserve i386 Xen pagetables, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 09/24] NULL noise: arch/x86/xen/smp.c, Jeremy Fitzhardinge
- [Xen-devel] [PATCH 10/24] xen: mask XSAVE from cpuid, Jeremy Fitzhardinge
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