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xen-devel
[Xen-devel] [PATCH 4/5] x86-64/xen: Enable the vvar mapping
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To: |
x86@xxxxxxxxxx, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> |
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Subject: |
[Xen-devel] [PATCH 4/5] x86-64/xen: Enable the vvar mapping |
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From: |
Andy Lutomirski <luto@xxxxxxx> |
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Date: |
Tue, 26 Jul 2011 23:20:38 -0400 |
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Cc: |
jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, keir.xen@xxxxxxxxx, Andy Lutomirski <luto@xxxxxxx> |
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Tue, 26 Jul 2011 20:27:04 -0700 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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<cover.1311736366.git.luto@xxxxxxx> |
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References: |
<cover.1311736366.git.luto@xxxxxxx> |
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xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
Xen needs special treatment for fixmaps.
Signed-off-by: Andy Lutomirski <luto@xxxxxxx>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
arch/x86/xen/mmu.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f987bde..8cce339 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1916,6 +1916,7 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t
phys, pgprot_t prot)
# endif
#else
case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE:
+ case VVAR_PAGE:
#endif
case FIX_TEXT_POKE0:
case FIX_TEXT_POKE1:
@@ -1956,7 +1957,8 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t
phys, pgprot_t prot)
#ifdef CONFIG_X86_64
/* Replicate changes to map the vsyscall page into the user
pagetable vsyscall mapping. */
- if (idx >= VSYSCALL_LAST_PAGE && idx <= VSYSCALL_FIRST_PAGE) {
+ if ((idx >= VSYSCALL_LAST_PAGE && idx <= VSYSCALL_FIRST_PAGE) ||
+ idx == VVAR_PAGE) {
unsigned long vaddr = __fix_to_virt(idx);
set_pte_vaddr_pud(level3_user_vsyscall, vaddr, pte);
}
--
1.7.6
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