KVM: s390: convert handle lctl[g]()

Convert handle lctl[g]() 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>

1 files changed, 17 insertions, 19 deletions

diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index bc969722a293..44ff22007052 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -755,32 +755,31 @@ int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
 {
         int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
         int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
-        u64 useraddr;
         u32 val = 0;
         int reg, rc;
+        u64 ga;
 
         vcpu->stat.instruction_lctl++;
 
         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
                 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
 
-        useraddr = kvm_s390_get_base_disp_rs(vcpu);
+        ga = kvm_s390_get_base_disp_rs(vcpu);
 
-        if (useraddr & 3)
+        if (ga & 3)
                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 
-        VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
-                   useraddr);
-        trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
+        VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+        trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
 
         reg = reg1;
         do {
-                rc = get_guest(vcpu, val, (u32 __user *) useraddr);
+                rc = read_guest(vcpu, ga, &val, sizeof(val));
                 if (rc)
-                        return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+                        return kvm_s390_inject_prog_cond(vcpu, rc);
                 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
                 vcpu->arch.sie_block->gcr[reg] |= val;
-                useraddr += 4;
+                ga += 4;
                 if (reg == reg3)
                         break;
                 reg = (reg + 1) % 16;
@@ -793,7 +792,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
 {
         int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
         int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
-        u64 useraddr;
+        u64 ga, val;
         int reg, rc;
 
         vcpu->stat.instruction_lctlg++;
@@ -801,23 +800,22 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
                 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
 
-        useraddr = kvm_s390_get_base_disp_rsy(vcpu);
+        ga = kvm_s390_get_base_disp_rsy(vcpu);
 
-        if (useraddr & 7)
+        if (ga & 7)
                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 
         reg = reg1;
 
-        VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
-                   useraddr);
-        trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
+        VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+        trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
 
         do {
-                rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
-                               (u64 __user *) useraddr);
+                rc = read_guest(vcpu, ga, &val, sizeof(val));
                 if (rc)
-                        return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
-                useraddr += 8;
+                        return kvm_s390_inject_prog_cond(vcpu, rc);
+                vcpu->arch.sie_block->gcr[reg] = val;
+                ga += 8;
                 if (reg == reg3)
                         break;
                 reg = (reg + 1) % 16;