From: David Hildenbrand <dahi@xxxxxxxxxxxxxxxxxx>
We will have to read instructions not residing at the current PSW
address.
Reviewed-by: Eric Farman <farman@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David Hildenbrand <dahi@xxxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
arch/s390/kvm/gaccess.h | 9 +++++----
arch/s390/kvm/kvm-s390.c | 2 +-
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index 5c9cc18..7ce47fd 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -247,10 +247,11 @@ int read_guest(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, void *data,
/**
* read_guest_instr - copy instruction data from guest space to kernel space
* @vcpu: virtual cpu
+ * @ga: guest address
* @data: destination address in kernel space
* @len: number of bytes to copy
*
- * Copy @len bytes from the current psw address (guest space) to @data (kernel
+ * Copy @len bytes from the given address (guest space) to @data (kernel
* space).
*
* The behaviour of read_guest_instr is identical to read_guest, except that
@@ -258,10 +259,10 @@ int read_guest(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, void *data,
* address-space mode.
*/
static inline __must_check
-int read_guest_instr(struct kvm_vcpu *vcpu, void *data, unsigned long len)
+int read_guest_instr(struct kvm_vcpu *vcpu, unsigned long ga, void *data,
+ unsigned long len)
{
- return access_guest(vcpu, vcpu->arch.sie_block->gpsw.addr, 0, data, len,
- GACC_IFETCH);
+ return access_guest(vcpu, ga, 0, data, len, GACC_IFETCH);
}
/**
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 69401b8..66e73f4 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2588,7 +2588,7 @@ static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
* to look up the current opcode to get the length of the instruction
* to be able to forward the PSW.
*/
- rc = read_guest_instr(vcpu, &opcode, 1);
+ rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
ilen = insn_length(opcode);
if (rc < 0) {
return rc;
--
2.7.4
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