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authorRusty Russell <rusty@rustcorp.com.au>2009-04-19 23:14:00 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-04-19 23:14:01 +0930
commita489f0b555b753f9df8ddc24c7e74f657ef7ee7b (patch)
tree560bd8c56524b658eb0b46e03ef42e262eb5f9b7 /arch/x86/include
parent88df781afb788fa588dbf2e77f205214022a8893 (diff)
lguest: fix guest crash on non-linear addresses in gdt pvops
Fixes guest crash 'lguest: bad read address 0x4800000 len 256' The new per-cpu allocator ends up handing a non-linear address to write_gdt_entry. We do __pa() on it, and hand it to the host, which kills us. I've long wanted to make the hypercall "LOAD_GDT_ENTRY" to match the IDT code, but had no pressing reason until now. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: lguest@ozlabs.org
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/lguest_hcall.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/lguest_hcall.h b/arch/x86/include/asm/lguest_hcall.h
index 0f4ee7148afe..faae1996487b 100644
--- a/arch/x86/include/asm/lguest_hcall.h
+++ b/arch/x86/include/asm/lguest_hcall.h
@@ -5,7 +5,6 @@
#define LHCALL_FLUSH_ASYNC 0
#define LHCALL_LGUEST_INIT 1
#define LHCALL_SHUTDOWN 2
-#define LHCALL_LOAD_GDT 3
#define LHCALL_NEW_PGTABLE 4
#define LHCALL_FLUSH_TLB 5
#define LHCALL_LOAD_IDT_ENTRY 6
@@ -17,6 +16,7 @@
#define LHCALL_SET_PMD 15
#define LHCALL_LOAD_TLS 16
#define LHCALL_NOTIFY 17
+#define LHCALL_LOAD_GDT_ENTRY 18
#define LGUEST_TRAP_ENTRY 0x1F