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KVM: s390: introduce kvm_s390_fpu_(store|load)

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It's a bit nicer than having multiple lines and will help if there's
another re-work since we'll only have to change one location.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Janosch Frank 2024-02-20 08:56:34 +00:00 committed by Heiko Carstens
parent 778666df60
commit 4a59932874
3 changed files with 22 additions and 20 deletions
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6
arch/s390/kvm/interrupt.c
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@ -584,11 +584,7 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
mci.val = mchk->mcic;
/* take care of lazy register loading */
fpu_stfpc(&vcpu->run->s.regs.fpc);
if (cpu_has_vx())
save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
else
save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
kvm_s390_fpu_store(vcpu->run);
save_access_regs(vcpu->run->s.regs.acrs);
if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
save_gs_cb(current->thread.gs_cb);

18
arch/s390/kvm/kvm-s390.c
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@ -4949,11 +4949,7 @@ static void sync_regs(struct kvm_vcpu *vcpu)
}
save_access_regs(vcpu->arch.host_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
fpu_lfpc_safe(&vcpu->run->s.regs.fpc);
if (cpu_has_vx())
load_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
else
load_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
kvm_s390_fpu_load(vcpu->run);
/* Sync fmt2 only data */
if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) {
sync_regs_fmt2(vcpu);
@ -5014,11 +5010,7 @@ static void store_regs(struct kvm_vcpu *vcpu)
kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
save_access_regs(vcpu->run->s.regs.acrs);
restore_access_regs(vcpu->arch.host_acrs);
fpu_stfpc(&vcpu->run->s.regs.fpc);
if (cpu_has_vx())
save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
else
save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
kvm_s390_fpu_store(vcpu->run);
if (likely(!kvm_s390_pv_cpu_is_protected(vcpu)))
store_regs_fmt2(vcpu);
}
@ -5167,11 +5159,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
* switch in the run ioctl. Let's update our copies before we save
* it into the save area
*/
fpu_stfpc(&vcpu->run->s.regs.fpc);
if (cpu_has_vx())
save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
else
save_fp_regs((freg_t *)&vcpu->run->s.regs.fprs);
kvm_s390_fpu_store(vcpu->run);
save_access_regs(vcpu->run->s.regs.acrs);
return kvm_s390_store_status_unloaded(vcpu, addr);

18
arch/s390/kvm/kvm-s390.h
View File

@ -20,6 +20,24 @@
#include <asm/processor.h>
#include <asm/sclp.h>
static inline void kvm_s390_fpu_store(struct kvm_run *run)
{
fpu_stfpc(&run->s.regs.fpc);
if (cpu_has_vx())
save_vx_regs((__vector128 *)&run->s.regs.vrs);
else
save_fp_regs((freg_t *)&run->s.regs.fprs);
}
static inline void kvm_s390_fpu_load(struct kvm_run *run)
{
fpu_lfpc_safe(&run->s.regs.fpc);
if (cpu_has_vx())
load_vx_regs((__vector128 *)&run->s.regs.vrs);
else
load_fp_regs((freg_t *)&run->s.regs.fprs);
}
/* Transactional Memory Execution related macros */
#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
#define TDB_FORMAT1 1