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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>
This commit is contained in:
Alexander Graf 2014-06-11 10:36:17 +02:00
parent 0240755225
commit 0865a583a4
1 changed files with 10 additions and 10 deletions
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20
arch/powerpc/kvm/book3s_hv_rmhandlers.S
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@ -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