From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:53666 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727761AbgBTKka (ORCPT ); Thu, 20 Feb 2020 05:40:30 -0500 From: Christian Borntraeger Subject: [PATCH v3 18/37] KVM: s390: protvirt: Add new gprs location handling Date: Thu, 20 Feb 2020 05:40:01 -0500 Message-Id: <20200220104020.5343-19-borntraeger@de.ibm.com> In-Reply-To: <20200220104020.5343-1-borntraeger@de.ibm.com> References: <20200220104020.5343-1-borntraeger@de.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-s390-owner@vger.kernel.org List-ID: To: Christian Borntraeger , Janosch Frank Cc: KVM , Cornelia Huck , David Hildenbrand , Thomas Huth , Ulrich Weigand , Claudio Imbrenda , linux-s390 , Michael Mueller , Vasily Gorbik , Janosch Frank From: Janosch Frank Guest registers for protected guests are stored at offset 0x380. We will copy those to the usual places. Long term we could refactor this or use register access functions. Signed-off-by: Janosch Frank Reviewed-by: Thomas Huth Reviewed-by: Cornelia Huck Reviewed-by: David Hildenbrand [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 4 +++- arch/s390/kvm/kvm-s390.c | 11 +++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index ba3364b37159..4fcbb055a565 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -343,7 +343,9 @@ struct kvm_s390_itdb { struct sie_page { struct kvm_s390_sie_block sie_block; struct mcck_volatile_info mcck_info; /* 0x0200 */ - __u8 reserved218[1000]; /* 0x0218 */ + __u8 reserved218[360]; /* 0x0218 */ + __u64 pv_grregs[16]; /* 0x0380 */ + __u8 reserved400[512]; /* 0x0400 */ struct kvm_s390_itdb itdb; /* 0x0600 */ __u8 reserved700[2304]; /* 0x0700 */ }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index f9e05b3f0289..4750f36dc16d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4035,6 +4035,7 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) static int __vcpu_run(struct kvm_vcpu *vcpu) { int rc, exit_reason; + struct sie_page *sie_page = (struct sie_page *)vcpu->arch.sie_block; /* * We try to hold kvm->srcu during most of vcpu_run (except when run- @@ -4056,8 +4057,18 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) guest_enter_irqoff(); __disable_cpu_timer_accounting(vcpu); local_irq_enable(); + if (kvm_s390_pv_cpu_is_protected(vcpu)) { + memcpy(sie_page->pv_grregs, + vcpu->run->s.regs.gprs, + sizeof(sie_page->pv_grregs)); + } exit_reason = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); + if (kvm_s390_pv_cpu_is_protected(vcpu)) { + memcpy(vcpu->run->s.regs.gprs, + sie_page->pv_grregs, + sizeof(sie_page->pv_grregs)); + } local_irq_disable(); __enable_cpu_timer_accounting(vcpu); guest_exit_irqoff(); -- 2.25.0