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authorAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
committerAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
commit6792a3f47a2e42d7164292bf7f1a55cfc4c91652 (patch)
treeb90c002bfbbeaec92f5d8a2383dcabf6524016f7 /arch/powerpc/kernel/kvm_emul.S
parentfe2895d3d55146cac65b273c0f83e2c7e543cd0e (diff)
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fedora kernel: b920e9b748c595f970bf80ede7832d39f8d567dav3.4.1-2
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/powerpc/kernel/kvm_emul.S')
-rw-r--r--arch/powerpc/kernel/kvm_emul.S112
1 files changed, 84 insertions, 28 deletions
diff --git a/arch/powerpc/kernel/kvm_emul.S b/arch/powerpc/kernel/kvm_emul.S
index f2b1b2523e6..e291cf3cf95 100644
--- a/arch/powerpc/kernel/kvm_emul.S
+++ b/arch/powerpc/kernel/kvm_emul.S
@@ -13,6 +13,7 @@
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright SUSE Linux Products GmbH 2010
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* Authors: Alexander Graf <agraf@suse.de>
*/
@@ -65,6 +66,9 @@ kvm_hypercall_start:
shared->critical == r1 and r2 is always != r1 */ \
STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0);
+.global kvm_template_start
+kvm_template_start:
+
.global kvm_emulate_mtmsrd
kvm_emulate_mtmsrd:
@@ -167,6 +171,9 @@ maybe_stay_in_guest:
kvm_emulate_mtmsr_reg2:
ori r30, r0, 0
+ /* Put MSR into magic page because we don't call mtmsr */
+ STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
+
/* Check if we have to fetch an interrupt */
lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
cmpwi r31, 0
@@ -174,15 +181,10 @@ kvm_emulate_mtmsr_reg2:
/* Check if we may trigger an interrupt */
andi. r31, r30, MSR_EE
- beq no_mtmsr
-
- b do_mtmsr
+ bne do_mtmsr
no_mtmsr:
- /* Put MSR into magic page because we don't call mtmsr */
- STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
-
SCRATCH_RESTORE
/* Go back to caller */
@@ -210,24 +212,80 @@ kvm_emulate_mtmsr_orig_ins_offs:
kvm_emulate_mtmsr_len:
.long (kvm_emulate_mtmsr_end - kvm_emulate_mtmsr) / 4
+/* also used for wrteei 1 */
+.global kvm_emulate_wrtee
+kvm_emulate_wrtee:
+
+ SCRATCH_SAVE
+
+ /* Fetch old MSR in r31 */
+ LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
+
+ /* Insert new MSR[EE] */
+kvm_emulate_wrtee_reg:
+ ori r30, r0, 0
+ rlwimi r31, r30, 0, MSR_EE
+
+ /*
+ * If MSR[EE] is now set, check for a pending interrupt.
+ * We could skip this if MSR[EE] was already on, but that
+ * should be rare, so don't bother.
+ */
+ andi. r30, r30, MSR_EE
+
+ /* Put MSR into magic page because we don't call wrtee */
+ STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
+
+ beq no_wrtee
+
+ /* Check if we have to fetch an interrupt */
+ lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
+ cmpwi r30, 0
+ bne do_wrtee
+
+no_wrtee:
+ SCRATCH_RESTORE
+
+ /* Go back to caller */
+kvm_emulate_wrtee_branch:
+ b .
+
+do_wrtee:
+ SCRATCH_RESTORE
+ /* Just fire off the wrtee if it's critical */
+kvm_emulate_wrtee_orig_ins:
+ wrtee r0
-.global kvm_emulate_wrteei
-kvm_emulate_wrteei:
+ b kvm_emulate_wrtee_branch
+kvm_emulate_wrtee_end:
+
+.global kvm_emulate_wrtee_branch_offs
+kvm_emulate_wrtee_branch_offs:
+ .long (kvm_emulate_wrtee_branch - kvm_emulate_wrtee) / 4
+
+.global kvm_emulate_wrtee_reg_offs
+kvm_emulate_wrtee_reg_offs:
+ .long (kvm_emulate_wrtee_reg - kvm_emulate_wrtee) / 4
+
+.global kvm_emulate_wrtee_orig_ins_offs
+kvm_emulate_wrtee_orig_ins_offs:
+ .long (kvm_emulate_wrtee_orig_ins - kvm_emulate_wrtee) / 4
+
+.global kvm_emulate_wrtee_len
+kvm_emulate_wrtee_len:
+ .long (kvm_emulate_wrtee_end - kvm_emulate_wrtee) / 4
+
+.global kvm_emulate_wrteei_0
+kvm_emulate_wrteei_0:
SCRATCH_SAVE
/* Fetch old MSR in r31 */
LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
/* Remove MSR_EE from old MSR */
- li r30, 0
- ori r30, r30, MSR_EE
- andc r31, r31, r30
-
- /* OR new MSR_EE onto the old MSR */
-kvm_emulate_wrteei_ee:
- ori r31, r31, 0
+ rlwinm r31, r31, 0, ~MSR_EE
/* Write new MSR value back */
STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
@@ -235,22 +293,17 @@ kvm_emulate_wrteei_ee:
SCRATCH_RESTORE
/* Go back to caller */
-kvm_emulate_wrteei_branch:
+kvm_emulate_wrteei_0_branch:
b .
-kvm_emulate_wrteei_end:
-
-.global kvm_emulate_wrteei_branch_offs
-kvm_emulate_wrteei_branch_offs:
- .long (kvm_emulate_wrteei_branch - kvm_emulate_wrteei) / 4
+kvm_emulate_wrteei_0_end:
-.global kvm_emulate_wrteei_ee_offs
-kvm_emulate_wrteei_ee_offs:
- .long (kvm_emulate_wrteei_ee - kvm_emulate_wrteei) / 4
-
-.global kvm_emulate_wrteei_len
-kvm_emulate_wrteei_len:
- .long (kvm_emulate_wrteei_end - kvm_emulate_wrteei) / 4
+.global kvm_emulate_wrteei_0_branch_offs
+kvm_emulate_wrteei_0_branch_offs:
+ .long (kvm_emulate_wrteei_0_branch - kvm_emulate_wrteei_0) / 4
+.global kvm_emulate_wrteei_0_len
+kvm_emulate_wrteei_0_len:
+ .long (kvm_emulate_wrteei_0_end - kvm_emulate_wrteei_0) / 4
.global kvm_emulate_mtsrin
kvm_emulate_mtsrin:
@@ -300,3 +353,6 @@ kvm_emulate_mtsrin_orig_ins_offs:
.global kvm_emulate_mtsrin_len
kvm_emulate_mtsrin_len:
.long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4
+
+.global kvm_template_end
+kvm_template_end: