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| author | James Morris <jmorris@namei.org> | 2011-11-16 12:39:48 +1100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-11-16 12:39:48 +1100 |
| commit | 24942c8e5cc8696064ee207ff29d4cf21f70dafc (patch) | |
| tree | 08a8221eb72ec3da7746d7d76f6f5915ce77cde7 /arch/s390/kvm/diag.c | |
| parent | e163bc8e4a0cd1cdffadb58253f7651201722d56 (diff) | |
| parent | ff0ff78068dd8a962358dbbdafa9d6f24540d3e5 (diff) | |
Merge branch 'master'; commit 'v3.2-rc2' into next
Diffstat (limited to 'arch/s390/kvm/diag.c')
| -rw-r--r-- | arch/s390/kvm/diag.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c index 9e4c84187cf5..87cedd61be04 100644 --- a/arch/s390/kvm/diag.c +++ b/arch/s390/kvm/diag.c @@ -1,7 +1,7 @@ /* * diag.c - handling diagnose instructions * - * Copyright IBM Corp. 2008 + * 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) @@ -15,6 +15,34 @@ #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"); @@ -57,6 +85,8 @@ 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: |