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Commit 665170cb authored by Heiko Carstens's avatar Heiko Carstens Committed by Christian Borntraeger
Browse files

KVM: s390: convert __sigp_set_prefix()/handle_set_prefix() 



Convert __sigp_set_prefix() and handle_set_prefix() to new guest
access functions.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent d0bce605

arch/s390/kvm/priv.c

+12 −8
Original line number Diff line number Diff line
@@ -65,8 +65,8 @@ static int handle_set_clock(struct kvm_vcpu *vcpu) 
static int handle_set_prefix(struct kvm_vcpu *vcpu)

{

	u64 operand2;

	u32 address = 0;

	u8 tmp;

	u32 address;

	int rc;



	vcpu->stat.instruction_spx++;
@@ -80,14 +80,18 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu) 
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);



	/* get the value */

	if (get_guest(vcpu, address, (u32 __user *) operand2))

		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

	rc = read_guest(vcpu, operand2, &address, sizeof(address));

	if (rc)

		return kvm_s390_inject_prog_cond(vcpu, rc);



	address = address & 0x7fffe000u;

	address &= 0x7fffe000u;



	/* make sure that the new value is valid memory */

	if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||

	   (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)))

	/*

	 * Make sure the new value is valid memory. We only need to check the

	 * first page, since address is 8k aligned and memory pieces are always

	 * at least 1MB aligned and have at least a size of 1MB.

	 */

	if (kvm_is_error_gpa(vcpu->kvm, address))

		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);



	kvm_s390_set_prefix(vcpu, address);

arch/s390/kvm/sigp.c

+7 −5
Original line number Diff line number Diff line
@@ -235,7 +235,6 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, 
	struct kvm_vcpu *dst_vcpu = NULL;

	struct kvm_s390_interrupt_info *inti;

	int rc;

	u8 tmp;



	if (cpu_addr < KVM_MAX_VCPUS)

		dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
@@ -243,10 +242,13 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, 
		return SIGP_CC_NOT_OPERATIONAL;

	li = &dst_vcpu->arch.local_int;



	/* make sure that the new value is valid memory */

	address = address & 0x7fffe000u;

	if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||

	   copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {

	/*

	 * Make sure the new value is valid memory. We only need to check the

	 * first page, since address is 8k aligned and memory pieces are always

	 * at least 1MB aligned and have at least a size of 1MB.

	 */

	address &= 0x7fffe000u;

	if (kvm_is_error_gpa(vcpu->kvm, address)) {

		*reg &= 0xffffffff00000000UL;

		*reg |= SIGP_STATUS_INVALID_PARAMETER;

		return SIGP_CC_STATUS_STORED;