lkml.org 
[lkml]   [2006]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] KVM: AMD SVM: Avoid three more new instructions
From
Date
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-11-28 14:17    [W:0.023 / U:2.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site