From fb34c603655fafdd244227cb6b42d006469735fc Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Mon, 9 Sep 2013 17:58:38 +0200 Subject: [PATCH] KVM: s390: Fixes for PFMF Add a check for low-address protection to the PFMF handler and convert real-addresses to absolute if necessary, as it is defined in the Principles of Operations specification. Signed-off-by: Thomas Huth Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- arch/s390/kvm/priv.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 27f9051a78f8..a47157bca8a6 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -650,6 +650,11 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; + if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { + if (kvm_s390_check_low_addr_protection(vcpu, start)) + return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); + } + switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { case 0x00000000: end = (start + (1UL << 12)) & ~((1UL << 12) - 1); @@ -665,10 +670,15 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); } while (start < end) { - unsigned long useraddr; - - useraddr = gmap_translate(start, vcpu->arch.gmap); - if (IS_ERR((void *)useraddr)) + unsigned long useraddr, abs_addr; + + /* Translate guest address to host address */ + if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0) + abs_addr = kvm_s390_real_to_abs(vcpu, start); + else + abs_addr = start; + useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr)); + if (kvm_is_error_hva(useraddr)) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { -- 2.20.1