From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pan Xinhui Subject: Re: [PATCH v2 1/1] s390/spinlock: Provide vcpu_is_preempted Date: Fri, 30 Sep 2016 14:35:38 +0800 Message-ID: <99d81ce9-8362-1b6b-15e1-e451ed379d50@linux.vnet.ibm.com> References: <1475164265-246160-1-git-send-email-borntraeger@de.ibm.com> <1475164265-246160-2-git-send-email-borntraeger@de.ibm.com> <20160930055236.GB22004@tardis.cn.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Cc: kernellwp@gmail.com, linux-s390@vger.kernel.org, benh@kernel.crashing.org, jgross@suse.com, kvm@vger.kernel.org, Peter Zijlstra , Pan Xinhui , Heiko Carstens , linux-kernel@vger.kernel.org, will.deacon@arm.com, virtualization@lists.linux-foundation.org, mingo@redhat.com, paulus@samba.org, mpe@ellerman.id.au, xen-devel-request@lists.xenproject.org, Martin Schwidefsky , pbonzini@redhat.com, paulmck@linux.vnet.ibm.com To: Boqun Feng Return-path: In-Reply-To: <20160930055236.GB22004@tardis.cn.ibm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: kvm.vger.kernel.org CgrlnKggMjAxNi85LzMwIDEzOjUyLCBCb3F1biBGZW5nIOWGmemBkzoKPiBPbiBGcmksIFNlcCAz MCwgMjAxNiBhdCAxMjo0OTo1MlBNICswODAwLCBQYW4gWGluaHVpIHdyb3RlOgo+Pgo+Pgo+PiDl nKggMjAxNi85LzI5IDIzOjUxLCBDaHJpc3RpYW4gQm9ybnRyYWVnZXIg5YaZ6YGTOgo+Pj4gdGhp cyBpbXBsZW1lbnRzIHRoZSBzMzkwIGJhY2tlbmQgZm9yIGNvbW1pdAo+Pj4gImtlcm5lbC9zY2hl ZDogaW50cm9kdWNlIHZjcHUgcHJlZW1wdGVkIGNoZWNrIGludGVyZmFjZSIKPj4+IGJ5IHJld29y a2luZyB0aGUgZXhpc3Rpbmcgc21wX3ZjcHVfc2NoZWR1bGVkIGludG8KPj4+IGFyY2hfdmNwdV9p c19wcmVlbXB0ZWQuIFdlIGNhbiB0aGVuIGFsc28gZ2V0IHJpZCBvZiB0aGUKPj4+IGxvY2FsIGNw dV9pc19wcmVlbXB0ZWQgZnVuY3Rpb24gYnkgbW92aW5nIHRoZQo+Pj4gQ0lGX0VOQUJMRURfV0FJ VCB0ZXN0IGludG8gYXJjaF92Y3B1X2lzX3ByZWVtcHRlZC4KPj4+Cj4+PiBTaWduZWQtb2ZmLWJ5 OiBDaHJpc3RpYW4gQm9ybnRyYWVnZXIgPGJvcm50cmFlZ2VyQGRlLmlibS5jb20+Cj4+PiAtLS0K Pj4KPj4gaGksIENocmlzdGlhbgo+PiAJdGhhbmtzIGZvciB5b3VyIHBhdGNoIQo+Pgo+Pj4gIGFy Y2gvczM5MC9pbmNsdWRlL2FzbS9zcGlubG9jay5oIHwgIDMgKysrCj4+PiAgYXJjaC9zMzkwL2tl cm5lbC9zbXAuYyAgICAgICAgICAgfCAgOSArKysrKysrLS0KPj4+ICBhcmNoL3MzOTAvbGliL3Nw aW5sb2NrLmMgICAgICAgICB8IDI1ICsrKysrKysrLS0tLS0tLS0tLS0tLS0tLS0KPj4+ICAzIGZp bGVzIGNoYW5nZWQsIDE4IGluc2VydGlvbnMoKyksIDE5IGRlbGV0aW9ucygtKQo+Pj4KPj4+IGRp ZmYgLS1naXQgYS9hcmNoL3MzOTAvaW5jbHVkZS9hc20vc3BpbmxvY2suaCBiL2FyY2gvczM5MC9p bmNsdWRlL2FzbS9zcGlubG9jay5oCj4+PiBpbmRleCA2M2ViZjM3Li5lMTZlMDJmIDEwMDY0NAo+ Pj4gLS0tIGEvYXJjaC9zMzkwL2luY2x1ZGUvYXNtL3NwaW5sb2NrLmgKPj4+ICsrKyBiL2FyY2gv czM5MC9pbmNsdWRlL2FzbS9zcGlubG9jay5oCj4+PiBAQCAtMjEsNiArMjEsOSBAQCBfcmF3X2Nv bXBhcmVfYW5kX3N3YXAodW5zaWduZWQgaW50ICpsb2NrLCB1bnNpZ25lZCBpbnQgb2xkLCB1bnNp Z25lZCBpbnQgbmV3KQo+Pj4gIAlyZXR1cm4gX19zeW5jX2Jvb2xfY29tcGFyZV9hbmRfc3dhcChs b2NrLCBvbGQsIG5ldyk7Cj4+PiAgfQo+Pj4KPj4+ICtib29sIGFyY2hfdmNwdV9pc19wcmVlbXB0 ZWQoaW50IGNwdSk7Cj4+PiArI2RlZmluZSB2Y3B1X2lzX3ByZWVtcHRlZCBhcmNoX3ZjcHVfaXNf cHJlZW1wdGVkCj4+PiArCj4+PiAgLyoKPj4+ICAgKiBTaW1wbGUgc3BpbiBsb2NrIG9wZXJhdGlv bnMuICBUaGVyZSBhcmUgdHdvIHZhcmlhbnRzLCBvbmUgY2xlYXJzIElSUSdzCj4+PiAgICogb24g dGhlIGxvY2FsIHByb2Nlc3Nvciwgb25lIGRvZXMgbm90Lgo+Pj4gZGlmZiAtLWdpdCBhL2FyY2gv czM5MC9rZXJuZWwvc21wLmMgYi9hcmNoL3MzOTAva2VybmVsL3NtcC5jCj4+PiBpbmRleCA3Yjg5 YTc1Li40YWFkZDE2IDEwMDY0NAo+Pj4gLS0tIGEvYXJjaC9zMzkwL2tlcm5lbC9zbXAuYwo+Pj4g KysrIGIvYXJjaC9zMzkwL2tlcm5lbC9zbXAuYwo+Pj4gQEAgLTM3NiwxMCArMzc2LDE1IEBAIGlu dCBzbXBfZmluZF9wcm9jZXNzb3JfaWQodTE2IGFkZHJlc3MpCj4+PiAgCXJldHVybiAtMTsKPj4+ ICB9Cj4+Pgo+Pj4gLWludCBzbXBfdmNwdV9zY2hlZHVsZWQoaW50IGNwdSkKPj4gcm9vdEBsdGNh bHBpbmUyLWxwMTM6fi9saW51eCMgZ2l0IGdyZXAgLXduIHNtcF92Y3B1X3NjaGVkdWxlZCBhcmNo L3MzOTAvCj4+IGFyY2gvczM5MC9pbmNsdWRlL2FzbS9zbXAuaDozNDpleHRlcm4gaW50IHNtcF92 Y3B1X3NjaGVkdWxlZChpbnQgY3B1KTsKPj4gYXJjaC9zMzkwL2luY2x1ZGUvYXNtL3NtcC5oOjU2 OnN0YXRpYyBpbmxpbmUgaW50IHNtcF92Y3B1X3NjaGVkdWxlZChpbnQgY3B1KSB7IHJldHVybiAx OyB9Cj4+IGFyY2gvczM5MC9rZXJuZWwvc21wLmM6MzcxOmludCBzbXBfdmNwdV9zY2hlZHVsZWQo aW50IGNwdSkKPj4gYXJjaC9zMzkwL2xpYi9zcGlubG9jay5jOjQ0OiAgICBpZiAoc21wX3ZjcHVf c2NoZWR1bGVkKGNwdSkpCj4+Cj4+PiArYm9vbCBhcmNoX3ZjcHVfaXNfcHJlZW1wdGVkKGludCBj cHUpCj4+PiAgewo+Pj4gLQlyZXR1cm4gcGNwdV9ydW5uaW5nKHBjcHVfZGV2aWNlcyArIGNwdSk7 Cj4+PiArCWlmICh0ZXN0X2NwdV9mbGFnX29mKENJRl9FTkFCTEVEX1dBSVQsIGNwdSkpCj4+PiAr CQlyZXR1cm4gZmFsc2U7Cj4+PiArCWlmIChwY3B1X3J1bm5pbmcocGNwdV9kZXZpY2VzICsgY3B1 KSkKPj4+ICsJCXJldHVybiBmYWxzZTsKPj4gSSBzYXcgc21wX3ZjcHVfc2NoZWR1bGVkKCkgcmV0 dXJucyB0cnVlIGFsd2F5cyBvbiAhU01QIHN5c3RlbS4KPj4KPj4gbWF5YmUgd2UgY2FuIGRvIHNv bWVndGhpbmcgc2lsaW1hci4gbGlrZSBiZWxvdwo+Pgo+PiAjaWZuZGVmIENPTkZJR19TTVAKPj4g c3RhdGljIGlubGluZSBib29sIGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQoaW50IGNwdSkgeyByZXR1 cm4gIXRlc3RfY3B1X2ZsYWdfb2YoQ0lGX0VOQUJMRURfV0FJVCwgY3B1KTsgfQo+PiAjZWxzZQo+ PiAuLi4KPj4KPj4gYnV0IEkgY2FuJ3QgaGVscCB0aGlua2luZyB0aGF0IGlmIHRoaXMgaXMgYSFT TVAgc3lzdGVtLCBtYXliZSB3ZSBjb3VsZCBvbmx5Cj4+ICNpZm5kZWYgQ09ORklHX1NNUAo+PiBz dGF0aWMgaW5saW5lIGJvb2wgYXJjaF92Y3B1X2lzX3ByZWVtcHRlZChpbnQgY3B1KSB7IHJldHVy biBmYWxzZTsgfQo+PiAjZWxzZQo+Cj4gV2h5IGRvIHdlIG5lZWQgYSB2Y3B1X2lzX3ByZWVtcHRl ZCgpIGltcGxlbWVudGF0aW9uIGZvciBVUD8gV2hlcmUgd2lsbAo+IHlvdSB1c2UgaXQ/Cj4KeWVw LCBJIGFsc28gd29uZGVyIHRoYXQgOikKCkJ1dCB0aGVyZSBpcyBhIGRlZmluaXRhaW9uIG9mIHNt cF92Y3B1X3NjaGVkdWxlZCgpIGZvciAhU01QIGtlcm5lbC4KU28gSSBhbSBhIGxpdHRsZSB3b3Jy aWVkIHRoYXQgc29tZSBjb2RlIGhhcyBpbmNsdWRlZCB0aGlzIHNwaW5sb2NrLmggZm9yIFVQIGtl cm5lbCBhbHNvLgoKSGksIENocmlzdGlhbgoJQ291bGQgeW91IGhlbHAgY29uZmlybXMgdGhhdCB5 b3VyIHBhdGNoIHdvcmtzIG9uIFVQPyA6KQoKdGhhbmtzCnhpbmh1aQoKPiBSZWdhcmRzLAo+IEJv cXVuCj4KPj4gLi4uCj4+Cj4+Cj4+IHRoYW5rcwo+PiB4aW5odWkKPj4KPj4+ICsJcmV0dXJuIHRy dWU7Cj4+PiAgfQo+Pj4gK0VYUE9SVF9TWU1CT0woYXJjaF92Y3B1X2lzX3ByZWVtcHRlZCk7Cj4+ Pgo+Pj4gIHZvaWQgc21wX3lpZWxkX2NwdShpbnQgY3B1KQo+Pj4gIHsKPj4+IGRpZmYgLS1naXQg YS9hcmNoL3MzOTAvbGliL3NwaW5sb2NrLmMgYi9hcmNoL3MzOTAvbGliL3NwaW5sb2NrLmMKPj4+ IGluZGV4IGU1ZjUwYTcuLmU0OGE0OGUgMTAwNjQ0Cj4+PiAtLS0gYS9hcmNoL3MzOTAvbGliL3Nw aW5sb2NrLmMKPj4+ICsrKyBiL2FyY2gvczM5MC9saWIvc3BpbmxvY2suYwo+Pj4gQEAgLTM3LDE1 ICszNyw2IEBAIHN0YXRpYyBpbmxpbmUgdm9pZCBfcmF3X2NvbXBhcmVfYW5kX2RlbGF5KHVuc2ln bmVkIGludCAqbG9jaywgdW5zaWduZWQgaW50IG9sZCkKPj4+ICAJYXNtKCIuaW5zbiByc3ksMHhl YjAwMDAwMDAwMjIsJTAsMCwlMSIgOiA6ICJkIiAob2xkKSwgIlEiICgqbG9jaykpOwo+Pj4gIH0K Pj4+Cj4+PiAtc3RhdGljIGlubGluZSBpbnQgY3B1X2lzX3ByZWVtcHRlZChpbnQgY3B1KQo+Pj4g LXsKPj4+IC0JaWYgKHRlc3RfY3B1X2ZsYWdfb2YoQ0lGX0VOQUJMRURfV0FJVCwgY3B1KSkKPj4+ IC0JCXJldHVybiAwOwo+Pj4gLQlpZiAoc21wX3ZjcHVfc2NoZWR1bGVkKGNwdSkpCj4+PiAtCQly ZXR1cm4gMDsKPj4+IC0JcmV0dXJuIDE7Cj4+PiAtfQo+Pj4gLQo+Pj4gIHZvaWQgYXJjaF9zcGlu X2xvY2tfd2FpdChhcmNoX3NwaW5sb2NrX3QgKmxwKQo+Pj4gIHsKPj4+ICAJdW5zaWduZWQgaW50 IGNwdSA9IFNQSU5MT0NLX0xPQ0tWQUw7Cj4+PiBAQCAtNjIsNyArNTMsNyBAQCB2b2lkIGFyY2hf c3Bpbl9sb2NrX3dhaXQoYXJjaF9zcGlubG9ja190ICpscCkKPj4+ICAJCQljb250aW51ZTsKPj4+ ICAJCX0KPj4+ICAJCS8qIEZpcnN0IGl0ZXJhdGlvbjogY2hlY2sgaWYgdGhlIGxvY2sgb3duZXIg aXMgcnVubmluZy4gKi8KPj4+IC0JCWlmIChmaXJzdF9kaWFnICYmIGNwdV9pc19wcmVlbXB0ZWQo fm93bmVyKSkgewo+Pj4gKwkJaWYgKGZpcnN0X2RpYWcgJiYgYXJjaF92Y3B1X2lzX3ByZWVtcHRl ZCh+b3duZXIpKSB7Cj4+PiAgCQkJc21wX3lpZWxkX2NwdSh+b3duZXIpOwo+Pj4gIAkJCWZpcnN0 X2RpYWcgPSAwOwo+Pj4gIAkJCWNvbnRpbnVlOwo+Pj4gQEAgLTgxLDcgKzcyLDcgQEAgdm9pZCBh cmNoX3NwaW5fbG9ja193YWl0KGFyY2hfc3BpbmxvY2tfdCAqbHApCj4+PiAgCQkgKiB5aWVsZCB0 aGUgQ1BVIHVuY29uZGl0aW9uYWxseS4gRm9yIExQQVIgcmVseSBvbiB0aGUKPj4+ICAJCSAqIHNl bnNlIHJ1bm5pbmcgc3RhdHVzLgo+Pj4gIAkJICovCj4+PiAtCQlpZiAoIU1BQ0hJTkVfSVNfTFBB UiB8fCBjcHVfaXNfcHJlZW1wdGVkKH5vd25lcikpIHsKPj4+ICsJCWlmICghTUFDSElORV9JU19M UEFSIHx8IGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQofm93bmVyKSkgewo+Pj4gIAkJCXNtcF95aWVs ZF9jcHUofm93bmVyKTsKPj4+ICAJCQlmaXJzdF9kaWFnID0gMDsKPj4+ICAJCX0KPj4+IEBAIC0x MDgsNyArOTksNyBAQCB2b2lkIGFyY2hfc3Bpbl9sb2NrX3dhaXRfZmxhZ3MoYXJjaF9zcGlubG9j a190ICpscCwgdW5zaWduZWQgbG9uZyBmbGFncykKPj4+ICAJCQljb250aW51ZTsKPj4+ICAJCX0K Pj4+ICAJCS8qIENoZWNrIGlmIHRoZSBsb2NrIG93bmVyIGlzIHJ1bm5pbmcuICovCj4+PiAtCQlp ZiAoZmlyc3RfZGlhZyAmJiBjcHVfaXNfcHJlZW1wdGVkKH5vd25lcikpIHsKPj4+ICsJCWlmIChm aXJzdF9kaWFnICYmIGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQofm93bmVyKSkgewo+Pj4gIAkJCXNt cF95aWVsZF9jcHUofm93bmVyKTsKPj4+ICAJCQlmaXJzdF9kaWFnID0gMDsKPj4+ICAJCQljb250 aW51ZTsKPj4+IEBAIC0xMjcsNyArMTE4LDcgQEAgdm9pZCBhcmNoX3NwaW5fbG9ja193YWl0X2Zs YWdzKGFyY2hfc3BpbmxvY2tfdCAqbHAsIHVuc2lnbmVkIGxvbmcgZmxhZ3MpCj4+PiAgCQkgKiB5 aWVsZCB0aGUgQ1BVIHVuY29uZGl0aW9uYWxseS4gRm9yIExQQVIgcmVseSBvbiB0aGUKPj4+ICAJ CSAqIHNlbnNlIHJ1bm5pbmcgc3RhdHVzLgo+Pj4gIAkJICovCj4+PiAtCQlpZiAoIU1BQ0hJTkVf SVNfTFBBUiB8fCBjcHVfaXNfcHJlZW1wdGVkKH5vd25lcikpIHsKPj4+ICsJCWlmICghTUFDSElO RV9JU19MUEFSIHx8IGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQofm93bmVyKSkgewo+Pj4gIAkJCXNt cF95aWVsZF9jcHUofm93bmVyKTsKPj4+ICAJCQlmaXJzdF9kaWFnID0gMDsKPj4+ICAJCX0KPj4+ IEBAIC0xNjUsNyArMTU2LDcgQEAgdm9pZCBfcmF3X3JlYWRfbG9ja193YWl0KGFyY2hfcndsb2Nr X3QgKnJ3KQo+Pj4gIAlvd25lciA9IDA7Cj4+PiAgCXdoaWxlICgxKSB7Cj4+PiAgCQlpZiAoY291 bnQtLSA8PSAwKSB7Cj4+PiAtCQkJaWYgKG93bmVyICYmIGNwdV9pc19wcmVlbXB0ZWQofm93bmVy KSkKPj4+ICsJCQlpZiAob3duZXIgJiYgYXJjaF92Y3B1X2lzX3ByZWVtcHRlZCh+b3duZXIpKQo+ Pj4gIAkJCQlzbXBfeWllbGRfY3B1KH5vd25lcik7Cj4+PiAgCQkJY291bnQgPSBzcGluX3JldHJ5 Owo+Pj4gIAkJfQo+Pj4gQEAgLTIxMSw3ICsyMDIsNyBAQCB2b2lkIF9yYXdfd3JpdGVfbG9ja193 YWl0KGFyY2hfcndsb2NrX3QgKnJ3LCB1bnNpZ25lZCBpbnQgcHJldikKPj4+ICAJb3duZXIgPSAw Owo+Pj4gIAl3aGlsZSAoMSkgewo+Pj4gIAkJaWYgKGNvdW50LS0gPD0gMCkgewo+Pj4gLQkJCWlm IChvd25lciAmJiBjcHVfaXNfcHJlZW1wdGVkKH5vd25lcikpCj4+PiArCQkJaWYgKG93bmVyICYm IGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQofm93bmVyKSkKPj4+ICAJCQkJc21wX3lpZWxkX2NwdSh+ b3duZXIpOwo+Pj4gIAkJCWNvdW50ID0gc3Bpbl9yZXRyeTsKPj4+ICAJCX0KPj4+IEBAIC0yNDEs NyArMjMyLDcgQEAgdm9pZCBfcmF3X3dyaXRlX2xvY2tfd2FpdChhcmNoX3J3bG9ja190ICpydykK Pj4+ICAJb3duZXIgPSAwOwo+Pj4gIAl3aGlsZSAoMSkgewo+Pj4gIAkJaWYgKGNvdW50LS0gPD0g MCkgewo+Pj4gLQkJCWlmIChvd25lciAmJiBjcHVfaXNfcHJlZW1wdGVkKH5vd25lcikpCj4+PiAr CQkJaWYgKG93bmVyICYmIGFyY2hfdmNwdV9pc19wcmVlbXB0ZWQofm93bmVyKSkKPj4+ICAJCQkJ c21wX3lpZWxkX2NwdSh+b3duZXIpOwo+Pj4gIAkJCWNvdW50ID0gc3Bpbl9yZXRyeTsKPj4+ICAJ CX0KPj4+IEBAIC0yODUsNyArMjc2LDcgQEAgdm9pZCBhcmNoX2xvY2tfcmVsYXgodW5zaWduZWQg aW50IGNwdSkKPj4+ICB7Cj4+PiAgCWlmICghY3B1KQo+Pj4gIAkJcmV0dXJuOwo+Pj4gLQlpZiAo TUFDSElORV9JU19MUEFSICYmICFjcHVfaXNfcHJlZW1wdGVkKH5jcHUpKQo+Pj4gKwlpZiAoTUFD SElORV9JU19MUEFSICYmICFhcmNoX3ZjcHVfaXNfcHJlZW1wdGVkKH5jcHUpKQo+Pj4gIAkJcmV0 dXJuOwo+Pj4gIAlzbXBfeWllbGRfY3B1KH5jcHUpOwo+Pj4gIH0KPj4+Cj4+CgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWls aW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6 Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRp b24=