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Commit ddca156a authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Alexander Graf
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KVM: PPC: BOOK3S: Remove open coded make_dsisr in alignment handler 



Use make_dsisr instead of open coding it. This also have
the added benefit of handling alignment interrupt on additional
instructions.

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 7310f3a5

arch/powerpc/include/asm/disassemble.h

+34 −0
Original line number Diff line number Diff line
@@ -81,4 +81,38 @@ static inline unsigned int get_oc(u32 inst) 
{

	return (inst >> 11) & 0x7fff;

}



#define IS_XFORM(inst)	(get_op(inst)  == 31)

#define IS_DSFORM(inst)	(get_op(inst) >= 56)



/*

 * Create a DSISR value from the instruction

 */

static inline unsigned make_dsisr(unsigned instr)

{

	unsigned dsisr;





	/* bits  6:15 --> 22:31 */

	dsisr = (instr & 0x03ff0000) >> 16;



	if (IS_XFORM(instr)) {

		/* bits 29:30 --> 15:16 */

		dsisr |= (instr & 0x00000006) << 14;

		/* bit     25 -->    17 */

		dsisr |= (instr & 0x00000040) << 8;

		/* bits 21:24 --> 18:21 */

		dsisr |= (instr & 0x00000780) << 3;

	} else {

		/* bit      5 -->    17 */

		dsisr |= (instr & 0x04000000) >> 12;

		/* bits  1: 4 --> 18:21 */

		dsisr |= (instr & 0x78000000) >> 17;

		/* bits 30:31 --> 12:13 */

		if (IS_DSFORM(instr))

			dsisr |= (instr & 0x00000003) << 18;

	}



	return dsisr;

}

#endif /* __ASM_PPC_DISASSEMBLE_H__ */

arch/powerpc/kernel/align.c

+1 −33
Original line number Diff line number Diff line
@@ -25,14 +25,13 @@ 
#include <asm/cputable.h>

#include <asm/emulated_ops.h>

#include <asm/switch_to.h>

#include <asm/disassemble.h>



struct aligninfo {

	unsigned char len;

	unsigned char flags;

};



#define IS_XFORM(inst)	(((inst) >> 26) == 31)

#define IS_DSFORM(inst)	(((inst) >> 26) >= 56)



#define INVALID	{ 0, 0 }
@@ -191,37 +190,6 @@ static struct aligninfo aligninfo[128] = { 
	INVALID,		/* 11 1 1111 */

};



/*

 * Create a DSISR value from the instruction

 */

static inline unsigned make_dsisr(unsigned instr)

{

	unsigned dsisr;





	/* bits  6:15 --> 22:31 */

	dsisr = (instr & 0x03ff0000) >> 16;



	if (IS_XFORM(instr)) {

		/* bits 29:30 --> 15:16 */

		dsisr |= (instr & 0x00000006) << 14;

		/* bit     25 -->    17 */

		dsisr |= (instr & 0x00000040) << 8;

		/* bits 21:24 --> 18:21 */

		dsisr |= (instr & 0x00000780) << 3;

	} else {

		/* bit      5 -->    17 */

		dsisr |= (instr & 0x04000000) >> 12;

		/* bits  1: 4 --> 18:21 */

		dsisr |= (instr & 0x78000000) >> 17;

		/* bits 30:31 --> 12:13 */

		if (IS_DSFORM(instr))

			dsisr |= (instr & 0x00000003) << 18;

	}



	return dsisr;

}



/*

 * The dcbz (data cache block zero) instruction

 * gives an alignment fault if used on non-cacheable

arch/powerpc/kvm/book3s_emulate.c

+1 −38
Original line number Diff line number Diff line
@@ -634,44 +634,7 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val 


u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)

{

	u32 dsisr = 0;



	/*

	 * This is what the spec says about DSISR bits (not mentioned = 0):

	 *

	 * 12:13		[DS]	Set to bits 30:31

	 * 15:16		[X]	Set to bits 29:30

	 * 17			[X]	Set to bit 25

	 *			[D/DS]	Set to bit 5

	 * 18:21		[X]	Set to bits 21:24

	 *			[D/DS]	Set to bits 1:4

	 * 22:26			Set to bits 6:10 (RT/RS/FRT/FRS)

	 * 27:31			Set to bits 11:15 (RA)

	 */



	switch (get_op(inst)) {

	/* D-form */

	case OP_LFS:

	case OP_LFD:

	case OP_STFD:

	case OP_STFS:

		dsisr |= (inst >> 12) & 0x4000;	/* bit 17 */

		dsisr |= (inst >> 17) & 0x3c00; /* bits 18:21 */

		break;

	/* X-form */

	case 31:

		dsisr |= (inst << 14) & 0x18000; /* bits 15:16 */

		dsisr |= (inst << 8)  & 0x04000; /* bit 17 */

		dsisr |= (inst << 3)  & 0x03c00; /* bits 18:21 */

		break;

	default:

		printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);

		break;

	}



	dsisr |= (inst >> 16) & 0x03ff; /* bits 22:31 */



	return dsisr;

	return make_dsisr(inst);

}



ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)