On Fri, 2024-02-16 at 22:36 +0100, Eric Farman wrote:
The routine ar_translation() can be reached by both the instruction intercept path (where the access registers had been loaded with the guest register contents), and the MEM_OP ioctls (which hadn't). Since this routine saves the current registers to vcpu->run, this routine erroneously saves host registers into the guest space.
Introduce a boolean in the kvm_vcpu_arch struct to indicate whether the registers contain guest contents. If they do (the instruction intercept path), the save can be performed and the AR translation is done just as it is today. If they don't (the MEM_OP path), the AR can be read from vcpu->run without stashing the current contents.
Signed-off-by: Eric Farman farman@linux.ibm.com
Reviewed-by: Nina Schoetterl-Glausch nsg@linux.ibm.com
arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/gaccess.c | 3 ++- arch/s390/kvm/kvm-s390.c | 3 +++ 3 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 52664105a473..c86215eb4ca7 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -765,6 +765,7 @@ struct kvm_vcpu_arch { __u64 cputm_start; bool gs_enabled; bool skey_enabled;
- bool acrs_loaded;
Not sure how descriptive that name is. Maybe add a comment.
struct kvm_s390_pv_vcpu pv; union diag318_info diag318_info; };
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