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authorAlexander Graf <agraf@suse.de>2014-06-11 10:36:17 +0200
committerAlexander Graf <agraf@suse.de>2014-07-28 15:22:23 +0200
commit0865a583a4881975cc4b621f4886c02f01600302 (patch)
tree01393be08c4fb9b791f1f2b8cd3c63a1d99c2052
parent02407552256111479fbfd23a3e01218b399aaa35 (diff)
downloadop-kernel-dev-0865a583a4881975cc4b621f4886c02f01600302.zip
op-kernel-dev-0865a583a4881975cc4b621f4886c02f01600302.tar.gz
KVM: PPC: Book3S HV: Access host lppaca and shadow slb in BE
Some data structures are always stored in big endian. Among those are the LPPACA fields as well as the shadow slb. These structures might be shared with a hypervisor. So whenever we access those fields, make sure we do so in big endian byte order. Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S20
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index e66c1e38..bf5270e 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -32,10 +32,6 @@
#define VCPU_GPRS_TM(reg) (((reg) * ULONG_SIZE) + VCPU_GPR_TM)
-#ifdef __LITTLE_ENDIAN__
-#error Need to fix lppaca and SLB shadow accesses in little endian mode
-#endif
-
/* Values in HSTATE_NAPPING(r13) */
#define NAPPING_CEDE 1
#define NAPPING_NOVCPU 2
@@ -595,9 +591,10 @@ kvmppc_got_guest:
ld r3, VCPU_VPA(r4)
cmpdi r3, 0
beq 25f
- lwz r5, LPPACA_YIELDCOUNT(r3)
+ li r6, LPPACA_YIELDCOUNT
+ LWZX_BE r5, r3, r6
addi r5, r5, 1
- stw r5, LPPACA_YIELDCOUNT(r3)
+ STWX_BE r5, r3, r6
li r6, 1
stb r6, VCPU_VPA_DIRTY(r4)
25:
@@ -1442,9 +1439,10 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
ld r8, VCPU_VPA(r9) /* do they have a VPA? */
cmpdi r8, 0
beq 25f
- lwz r3, LPPACA_YIELDCOUNT(r8)
+ li r4, LPPACA_YIELDCOUNT
+ LWZX_BE r3, r8, r4
addi r3, r3, 1
- stw r3, LPPACA_YIELDCOUNT(r8)
+ STWX_BE r3, r8, r4
li r3, 1
stb r3, VCPU_VPA_DIRTY(r9)
25:
@@ -1757,8 +1755,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
33: ld r8,PACA_SLBSHADOWPTR(r13)
.rept SLB_NUM_BOLTED
- ld r5,SLBSHADOW_SAVEAREA(r8)
- ld r6,SLBSHADOW_SAVEAREA+8(r8)
+ li r3, SLBSHADOW_SAVEAREA
+ LDX_BE r5, r8, r3
+ addi r3, r3, 8
+ LDX_BE r6, r8, r3
andis. r7,r5,SLB_ESID_V@h
beq 1f
slbmte r6,r5
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