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

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

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Heiko Carstens 2014-01-01 16:47:12 +01:00 committed by Christian Borntraeger
parent d0bce6054a
commit 665170cb47
2 changed files with 19 additions and 13 deletions
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20
arch/s390/kvm/priv.c
View file

@ -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);

12
arch/s390/kvm/sigp.c
View file

@ -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;