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Commit 0865a583 authored by Alexander Graf's avatar Alexander Graf
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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: default avatarAlexander Graf <agraf@suse.de>
parent 02407552

arch/powerpc/kvm/book3s_hv_rmhandlers.S

+10 −10
Original line number Diff line number Diff line
@@ -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