[v10,2/6] KVM: s390: Cleanup initial cpu reset
diff mbox series

Message ID 20200131100205.74720-3-frankja@linux.ibm.com
State New
Headers show
Series
  • KVM: s390: Add new reset vcpu API
Related show

Commit Message

Janosch Frank Jan. 31, 2020, 10:02 a.m. UTC
The code seems to be quite old and uses lots of unneeded spaces for
alignment, which doesn't really help with readability.

Let's:
* Get rid of the extra spaces
* Remove the ULs as they are not needed on 0s
* Define constants for the CR 0 and 14 initial values
* Use the sizeof of the gcr array to memset it to 0

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
 arch/s390/include/asm/kvm_host.h |  5 +++++
 arch/s390/kvm/kvm-s390.c         | 18 +++++++-----------
 2 files changed, 12 insertions(+), 11 deletions(-)

Comments

Christian Borntraeger Jan. 31, 2020, 11:31 a.m. UTC | #1
On 31.01.20 11:02, Janosch Frank wrote:
> The code seems to be quite old and uses lots of unneeded spaces for
> alignment, which doesn't really help with readability.
> 
> Let's:
> * Get rid of the extra spaces
> * Remove the ULs as they are not needed on 0s
> * Define constants for the CR 0 and 14 initial values
> * Use the sizeof of the gcr array to memset it to 0
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> Reviewed-by: Thomas Huth <thuth@redhat.com>

applied.

> ---
>  arch/s390/include/asm/kvm_host.h |  5 +++++
>  arch/s390/kvm/kvm-s390.c         | 18 +++++++-----------
>  2 files changed, 12 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index 02f4c21c57f6..73044545ecac 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -122,6 +122,11 @@ struct mcck_volatile_info {
>  	__u32 reserved;
>  };
>  
> +#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
> +			  CR0_MEASUREMENT_ALERT_SUBMASK)
> +#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
> +			   CR14_EXTERNAL_DAMAGE_SUBMASK)
> +
>  #define CPUSTAT_STOPPED    0x80000000
>  #define CPUSTAT_WAIT       0x10000000
>  #define CPUSTAT_ECALL_PEND 0x08000000
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 876802894b35..bb072866bd69 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -2847,19 +2847,15 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
>  static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
>  {
>  	/* this equals initial cpu reset in pop, but we don't switch to ESA */
> -	vcpu->arch.sie_block->gpsw.mask = 0UL;
> -	vcpu->arch.sie_block->gpsw.addr = 0UL;
> +	vcpu->arch.sie_block->gpsw.mask = 0;
> +	vcpu->arch.sie_block->gpsw.addr = 0;
>  	kvm_s390_set_prefix(vcpu, 0);
>  	kvm_s390_set_cpu_timer(vcpu, 0);
> -	vcpu->arch.sie_block->ckc       = 0UL;
> -	vcpu->arch.sie_block->todpr     = 0;
> -	memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
> -	vcpu->arch.sie_block->gcr[0]  = CR0_UNUSED_56 |
> -					CR0_INTERRUPT_KEY_SUBMASK |
> -					CR0_MEASUREMENT_ALERT_SUBMASK;
> -	vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
> -					CR14_UNUSED_33 |
> -					CR14_EXTERNAL_DAMAGE_SUBMASK;
> +	vcpu->arch.sie_block->ckc = 0;
> +	vcpu->arch.sie_block->todpr = 0;
> +	memset(vcpu->arch.sie_block->gcr, 0, sizeof(vcpu->arch.sie_block->gcr));
> +	vcpu->arch.sie_block->gcr[0] = CR0_INITIAL_MASK;
> +	vcpu->arch.sie_block->gcr[14] = CR14_INITIAL_MASK;
>  	vcpu->run->s.regs.fpc = 0;
>  	vcpu->arch.sie_block->gbea = 1;
>  	vcpu->arch.sie_block->pp = 0;
>

Patch
diff mbox series

diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 02f4c21c57f6..73044545ecac 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -122,6 +122,11 @@  struct mcck_volatile_info {
 	__u32 reserved;
 };
 
+#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
+			  CR0_MEASUREMENT_ALERT_SUBMASK)
+#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
+			   CR14_EXTERNAL_DAMAGE_SUBMASK)
+
 #define CPUSTAT_STOPPED    0x80000000
 #define CPUSTAT_WAIT       0x10000000
 #define CPUSTAT_ECALL_PEND 0x08000000
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 876802894b35..bb072866bd69 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2847,19 +2847,15 @@  void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
 {
 	/* this equals initial cpu reset in pop, but we don't switch to ESA */
-	vcpu->arch.sie_block->gpsw.mask = 0UL;
-	vcpu->arch.sie_block->gpsw.addr = 0UL;
+	vcpu->arch.sie_block->gpsw.mask = 0;
+	vcpu->arch.sie_block->gpsw.addr = 0;
 	kvm_s390_set_prefix(vcpu, 0);
 	kvm_s390_set_cpu_timer(vcpu, 0);
-	vcpu->arch.sie_block->ckc       = 0UL;
-	vcpu->arch.sie_block->todpr     = 0;
-	memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
-	vcpu->arch.sie_block->gcr[0]  = CR0_UNUSED_56 |
-					CR0_INTERRUPT_KEY_SUBMASK |
-					CR0_MEASUREMENT_ALERT_SUBMASK;
-	vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
-					CR14_UNUSED_33 |
-					CR14_EXTERNAL_DAMAGE_SUBMASK;
+	vcpu->arch.sie_block->ckc = 0;
+	vcpu->arch.sie_block->todpr = 0;
+	memset(vcpu->arch.sie_block->gcr, 0, sizeof(vcpu->arch.sie_block->gcr));
+	vcpu->arch.sie_block->gcr[0] = CR0_INITIAL_MASK;
+	vcpu->arch.sie_block->gcr[14] = CR14_INITIAL_MASK;
 	vcpu->run->s.regs.fpc = 0;
 	vcpu->arch.sie_block->gbea = 1;
 	vcpu->arch.sie_block->pp = 0;