mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 11:13:58 +08:00
9e6dabeffd
CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped. This is not, however, what the architecture says: RUNNING should be set when the host is acting on the behalf of the guest operating system. CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load() and to be unset in kvm_arch_vcpu_put(). For signifying stopped state of a vcpu, a host-controlled bit has been used and is set/unset basically on the reverse as the old CPUSTAT_RUNNING bit (including pushing it down into stop handling proper in handle_stop()). Cc: stable@kernel.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
|
|
* diag.c - handling diagnose instructions
|
|
*
|
|
* Copyright IBM Corp. 2008,2011
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (version 2 only)
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Author(s): Carsten Otte <cotte@de.ibm.com>
|
|
* Christian Borntraeger <borntraeger@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/kvm.h>
|
|
#include <linux/kvm_host.h>
|
|
#include "kvm-s390.h"
|
|
|
|
static int diag_release_pages(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long start, end;
|
|
unsigned long prefix = vcpu->arch.sie_block->prefix;
|
|
|
|
start = vcpu->arch.guest_gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];
|
|
end = vcpu->arch.guest_gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;
|
|
|
|
if (start & ~PAGE_MASK || end & ~PAGE_MASK || start > end
|
|
|| start < 2 * PAGE_SIZE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
VCPU_EVENT(vcpu, 5, "diag release pages %lX %lX", start, end);
|
|
vcpu->stat.diagnose_10++;
|
|
|
|
/* we checked for start > end above */
|
|
if (end < prefix || start >= prefix + 2 * PAGE_SIZE) {
|
|
gmap_discard(start, end, vcpu->arch.gmap);
|
|
} else {
|
|
if (start < prefix)
|
|
gmap_discard(start, prefix, vcpu->arch.gmap);
|
|
if (end >= prefix)
|
|
gmap_discard(prefix + 2 * PAGE_SIZE,
|
|
end, vcpu->arch.gmap);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __diag_time_slice_end(struct kvm_vcpu *vcpu)
|
|
{
|
|
VCPU_EVENT(vcpu, 5, "%s", "diag time slice end");
|
|
vcpu->stat.diagnose_44++;
|
|
vcpu_put(vcpu);
|
|
yield();
|
|
vcpu_load(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;
|
|
unsigned long subcode = vcpu->arch.guest_gprs[reg] & 0xffff;
|
|
|
|
VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode);
|
|
switch (subcode) {
|
|
case 3:
|
|
vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;
|
|
break;
|
|
case 4:
|
|
vcpu->run->s390_reset_flags = 0;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;
|
|
vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_RESET;
|
|
VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",
|
|
vcpu->run->s390_reset_flags);
|
|
return -EREMOTE;
|
|
}
|
|
|
|
int kvm_s390_handle_diag(struct kvm_vcpu *vcpu)
|
|
{
|
|
int code = (vcpu->arch.sie_block->ipb & 0xfff0000) >> 16;
|
|
|
|
switch (code) {
|
|
case 0x10:
|
|
return diag_release_pages(vcpu);
|
|
case 0x44:
|
|
return __diag_time_slice_end(vcpu);
|
|
case 0x308:
|
|
return __diag_ipl_functions(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|