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Diffstat (limited to 'arch/s390/kvm/intercept.c')
-rw-r--r--arch/s390/kvm/intercept.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index e757230b982..7f7347b5f34 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -18,6 +18,86 @@
#include <asm/kvm_host.h>
#include "kvm-s390.h"
+#include "gaccess.h"
+
+static int handle_lctg(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ int base2 = vcpu->arch.sie_block->ipb >> 28;
+ int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
+ ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
+ u64 useraddr;
+ int reg, rc;
+
+ vcpu->stat.instruction_lctg++;
+ if ((vcpu->arch.sie_block->ipb & 0xff) != 0x2f)
+ return -ENOTSUPP;
+
+ useraddr = disp2;
+ if (base2)
+ useraddr += vcpu->arch.guest_gprs[base2];
+
+ reg = reg1;
+
+ VCPU_EVENT(vcpu, 5, "lctg r1:%x, r3:%x,b2:%x,d2:%x", reg1, reg3, base2,
+ disp2);
+
+ do {
+ rc = get_guest_u64(vcpu, useraddr,
+ &vcpu->arch.sie_block->gcr[reg]);
+ if (rc == -EFAULT) {
+ kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ break;
+ }
+ useraddr += 8;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+ return 0;
+}
+
+static int handle_lctl(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ int base2 = vcpu->arch.sie_block->ipb >> 28;
+ int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
+ u64 useraddr;
+ u32 val = 0;
+ int reg, rc;
+
+ vcpu->stat.instruction_lctl++;
+
+ useraddr = disp2;
+ if (base2)
+ useraddr += vcpu->arch.guest_gprs[base2];
+
+ VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x,b2:%x,d2:%x", reg1, reg3, base2,
+ disp2);
+
+ reg = reg1;
+ do {
+ rc = get_guest_u32(vcpu, useraddr, &val);
+ if (rc == -EFAULT) {
+ kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ break;
+ }
+ vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
+ vcpu->arch.sie_block->gcr[reg] |= val;
+ useraddr += 4;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+ return 0;
+}
+
+static intercept_handler_t instruction_handlers[256] = {
+ [0xb7] = handle_lctl,
+ [0xeb] = handle_lctg,
+};
static int handle_noop(struct kvm_vcpu *vcpu)
{
@@ -58,10 +138,46 @@ static int handle_validity(struct kvm_vcpu *vcpu)
return -ENOTSUPP;
}
+static int handle_instruction(struct kvm_vcpu *vcpu)
+{
+ intercept_handler_t handler;
+
+ vcpu->stat.exit_instruction++;
+ handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8];
+ if (handler)
+ return handler(vcpu);
+ return -ENOTSUPP;
+}
+
+static int handle_prog(struct kvm_vcpu *vcpu)
+{
+ vcpu->stat.exit_program_interruption++;
+ return kvm_s390_inject_program_int(vcpu, vcpu->arch.sie_block->iprcc);
+}
+
+static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
+{
+ int rc, rc2;
+
+ vcpu->stat.exit_instr_and_program++;
+ rc = handle_instruction(vcpu);
+ rc2 = handle_prog(vcpu);
+
+ if (rc == -ENOTSUPP)
+ vcpu->arch.sie_block->icptcode = 0x04;
+ if (rc)
+ return rc;
+ return rc2;
+}
+
static const intercept_handler_t intercept_funcs[0x48 >> 2] = {
[0x00 >> 2] = handle_noop,
+ [0x04 >> 2] = handle_instruction,
+ [0x08 >> 2] = handle_prog,
+ [0x0C >> 2] = handle_instruction_and_prog,
[0x10 >> 2] = handle_noop,
[0x14 >> 2] = handle_noop,
+ [0x1C >> 2] = kvm_s390_handle_wait,
[0x20 >> 2] = handle_validity,
[0x28 >> 2] = handle_stop,
};