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authorCornelia Huck <cornelia.huck@de.ibm.com>2012-12-20 14:32:07 (GMT)
committerMarcelo Tosatti <mtosatti@redhat.com>2013-01-07 21:53:38 (GMT)
commitb1c571a50dfacf25a24c23271e9b8bf18ff6b102 (patch)
treeca6408076537bab63fd2b7e9df890f1a524c14a3 /arch/s390/kvm/priv.c
parent77975357956c6450dd7ac3dfe572c1a8f0014c54 (diff)
downloadlinux-b1c571a50dfacf25a24c23271e9b8bf18ff6b102.tar.xz
KVM: s390: Decoding helper functions.
Introduce helper functions for decoding the various base/displacement instruction formats. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/s390/kvm/priv.c')
-rw-r--r--arch/s390/kvm/priv.c42
1 files changed, 11 insertions, 31 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 1aeb933..d715842 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -24,17 +24,13 @@
static int handle_set_prefix(struct kvm_vcpu *vcpu)
{
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 operand2;
u32 address = 0;
u8 tmp;
vcpu->stat.instruction_spx++;
- operand2 = disp2;
- if (base2)
- operand2 += vcpu->run->s.regs.gprs[base2];
+ operand2 = kvm_s390_get_base_disp_s(vcpu);
/* must be word boundary */
if (operand2 & 3) {
@@ -67,15 +63,12 @@ out:
static int handle_store_prefix(struct kvm_vcpu *vcpu)
{
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 operand2;
u32 address;
vcpu->stat.instruction_stpx++;
- operand2 = disp2;
- if (base2)
- operand2 += vcpu->run->s.regs.gprs[base2];
+
+ operand2 = kvm_s390_get_base_disp_s(vcpu);
/* must be word boundary */
if (operand2 & 3) {
@@ -100,15 +93,12 @@ out:
static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
{
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 useraddr;
int rc;
vcpu->stat.instruction_stap++;
- useraddr = disp2;
- if (base2)
- useraddr += vcpu->run->s.regs.gprs[base2];
+
+ useraddr = kvm_s390_get_base_disp_s(vcpu);
if (useraddr & 1) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -178,15 +168,12 @@ static int handle_stfl(struct kvm_vcpu *vcpu)
static int handle_stidp(struct kvm_vcpu *vcpu)
{
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 operand2;
int rc;
vcpu->stat.instruction_stidp++;
- operand2 = disp2;
- if (base2)
- operand2 += vcpu->run->s.regs.gprs[base2];
+
+ operand2 = kvm_s390_get_base_disp_s(vcpu);
if (operand2 & 7) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -240,17 +227,13 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u64 operand2;
unsigned long mem;
vcpu->stat.instruction_stsi++;
VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
- operand2 = disp2;
- if (base2)
- operand2 += vcpu->run->s.regs.gprs[base2];
+ operand2 = kvm_s390_get_base_disp_s(vcpu);
if (operand2 & 0xfff && fc > 0)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -335,17 +318,14 @@ int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
static int handle_tprot(struct kvm_vcpu *vcpu)
{
- int base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
- int disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
- int base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
- int disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
- u64 address1 = disp1 + base1 ? vcpu->run->s.regs.gprs[base1] : 0;
- u64 address2 = disp2 + base2 ? vcpu->run->s.regs.gprs[base2] : 0;
+ u64 address1, address2;
struct vm_area_struct *vma;
unsigned long user_address;
vcpu->stat.instruction_tprot++;
+ kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
+
/* we only handle the Linux memory detection case:
* access key == 0
* guest DAT == off