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Subject[PATCH] KVM: AMD SVM: Avoid three more new instructions
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The clgi, stgi, and invlpga instructions are all too new to unleash on
the world's assemblers. Replace them with the opcode sequences.

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff -X /home/avi/kvm/linux-2.6/Documentation/dontdiff --exclude=Makefile -ru /home/avi/kvm/linux-2.6/drivers/kvm/svm.c /home/avi/kvm-release/kernel/svm.c
--- linux-2.6/drivers/kvm/svm.c 2006-11-28 14:31:03.000000000 +0200
+++ linux-2.6/drivers/kvm/svm.c 2006-11-28 15:08:19.000000000 +0200
@@ -102,17 +102,17 @@

static inline void clgi(void)
{
- asm volatile ("clgi");
+ asm volatile (SVM_CLGI);
}

static inline void stgi(void)
{
- asm volatile ("stgi");
+ asm volatile (SVM_STGI);
}

static inline void invlpga(unsigned long addr, u32 asid)
{
- asm volatile ("invlpga" :: "a"(addr), "c"(asid));
+ asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
}

static inline unsigned long read_cr2(void)
diff -X /home/avi/kvm/linux-2.6/Documentation/dontdiff --exclude=Makefile -ru /home/avi/kvm/linux-2.6/drivers/kvm/svm.h /home/avi/kvm-release/kernel/svm.h
--- linux-2.6/drivers/kvm/svm.h 2006-11-28 14:14:17.000000000 +0200
+++ linux-2.6/drivers/kvm/svm.h 2006-11-28 15:09:17.000000000 +0200
@@ -307,6 +307,9 @@
#define SVM_VMLOAD ".byte 0x0f, 0x01, 0xda"
#define SVM_VMRUN ".byte 0x0f, 0x01, 0xd8"
#define SVM_VMSAVE ".byte 0x0f, 0x01, 0xdb"
+#define SVM_CLGI ".byte 0x0f, 0x01, 0xdd"
+#define SVM_STGI ".byte 0x0f, 0x01, 0xdc"
+#define SVM_INVLPGA ".byte 0x0f, 0x01, 0xdf"

#endif

-
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