Commit fb34c603 authored by Thomas Huth's avatar Thomas Huth Committed by Christian Borntraeger
Browse files

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: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent f8232c8c

arch/s390/kvm/priv.c

+14 −4
Original line number Diff line number Diff line
@@ -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;

		unsigned long useraddr, abs_addr;



		useraddr = gmap_translate(start, vcpu->arch.gmap);

		if (IS_ERR((void *)useraddr))

		/* 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) {

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