Re: [PATCH v6 0/5] riscv: Introduce support for hardware break/watchpoints
Jesse Taube <[email protected]> Tue, 4 Aug 2026 13:10:28 -0400
| Newsgroups | org.infradead.lists.linux-riscv,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CADRr4be9p14tQcx=v-jVwfXwka0eBV8MWPfj1G4qcqv=yfxjfg@mail.gmail.com> |
T24gTW9uLCBBdWcgMywgMjAyNiBhdCA5OjQ54oCvQU0gSGltYW5zaHUgQ2hhdWhhbgo8aGltYW5z aHUuY2hhdWhhbkBvc3MucXVhbGNvbW0uY29tPiB3cm90ZToKPgo+IFRoaXMgcGF0Y2hzZXQgYWRk cyBzdXBwb3J0IGZvciBoYXJkd2FyZSBicmVha3BvaW50cyBhbmQgd2F0Y2hwb2ludHMgaW4gdGhl Cj4gUklTQy1WIGFyY2hpdGVjdHVyZS4gVGhlIGZyYW1ld29yayBpcyBidWlsdCBvbiB0b3Agb2Yg dGhlIHBlcmYgc3Vic3lzdGVtIGFuZAo+IHRoZSBTQkkgZGVidWcgdHJpZ2dlciBleHRlbnNpb24g KFNkdHJpZykuCj4KPiB2NiBleHRlbmRzIHY1IHdpdGggdHdvIG5ldyBwYXRjaGVzOgo+Cj4gICAt IHB0cmFjZSBzdXBwb3J0OiBkZWJ1Z2dlcnMgY2FuIG5vdyBzZXQgYW5kIHF1ZXJ5IGhhcmR3YXJl IGRlYnVnIHRyaWdnZXJzCj4gICAgIHRocm91Z2ggdGhlIHN0YW5kYXJkIFBUUkFDRV9HRVRSRUdT RVQvU0VUUkVHU0VUIGludGVyZmFjZSB1c2luZyBuZXcKPiAgICAgTlRfUklTQ1ZfSFdfQlJFQUsv V0FUQ0ggbm90ZSB0eXBlcy4gQSBzaW1wbGVyIFBUUkFDRV9HRVRIQlBSRUdTL1NFVEhCUFJFR1MK PiAgICAgcmVxdWVzdCBwYWlyIGlzIGFsc28gcHJvdmlkZWQgZm9yIGRpcmVjdCBzaW5nbGUtdHJp Z2dlciBhY2Nlc3Mgd2l0aG91dCBnb2luZwo+ICAgICB0aHJvdWdoIHRoZSByZWdzZXQgbWFjaGlu ZXJ5LiBUaHJlYWQgZmx1c2gvY29weSBob29rcyBhcmUgd2lyZWQgdXAgc28KPiAgICAgcGVyLXRh c2sgYnJlYWtwb2ludHMgYXJlIGNsZWFuZWQgdXAgYWNyb3NzIGZvcmsvZXhlYy4KPgo+ICAgLSBF eHRlbmRlZCBzZWxmdGVzdDogdGhlIGV4aXN0aW5nIHBlcmZfZXZlbnQtYmFzZWQgc2VsZnRlc3Qg aXMgZXh0ZW5kZWQgdG8KPiAgICAgYWxzbyBleGVyY2lzZSB0aGUgbmV3IHB0cmFjZSBHRVRSRUdT RVQvU0VUUkVHU0VUIHJlZ3NldCBwYXRoIGFuZCB0aGUgcmF3Cj4gICAgIFBUUkFDRV9HRVRIQlBS RUdTL1NFVEhCUFJFR1MgaW50ZXJmYWNlLgoKSSB3b3VsZCByZWNvbWVudCBhZGRhcGluZwpgdG9v bHMvdGVzdGluZy9zZWxmdGVzdHMvYnJlYWtwb2ludHMvYnJlYWtwb2ludF90ZXN0X2FybTY0LmNg IGFzIGEKdGVzdC4KSSBzZXQgdXAgYSB0ZXN0IHJlcG9zaXRvcnkgaGVyZQpodHRwczovL2dpdGh1 Yi5jb20vTXItQm9zc21hbi9kYnRyLWJ1aWxkcm9vdCBmb3IgYW55b25lIGVsc2UgdG8gdGVzdAp0 aGlzIHNldC4KClVuZm9ydHVuYXRseSB0aGlzIHNldCBmYWlscyBgcGVyZiB0ZXN0IDE1IDE2IDE3 IDE4YC4gSSB3b3VsZCBsaWtlCnRob3NlIHRlc3RzIHRvIHBhc3MKYmVmb3JlIGFjY2VwdGluZyB0 aGlzIHNldC4gTXkgc2V0IGFkZHJlc3NlcyB0aGUgcGVyZiBmYWlsdXJlcyB3aGljaCBpcyB3aHkg aXQgaXMKbW9yZSBjb21wbGljYXRlZC4KCkkgd291bGQgaGlnaGx5IHJlY29tbWVuZCBiYXNpbmcg eW91ciBzZXQgb2ZmIG9mIGl0IGFzIGl0IGZpeGVzIG1hbnkgb2YKdGhlIGlzc3VlcyB0aGF0Ckkg Y29tbWVudGVkIG9uIGluIFY1LiBUaGUgZmlyc3QgdHdvIGNvbW1pdHMgaW4gbXkgc2VyaWVzIGFy ZQpyZWZhY3RvcmluZyBkdXBsaWNhdGUgY29kZSwKYW5kIGNhbiB0ZWNobmljYWxseSBiZSBkcm9w cGVkLiBFdmVuIGlmIHlvdSBkb24ndCBnbyBmb3J3YXJkIHdpdGggdXNpbmcgbXkgc2V0LApJIHdv dWxkIGF0IGxlYXN0IHJlY29tbWVuZCB0YWtpbmcgYSBsb29rIGF0IGl0LCBlc3BlY2lhbGx5CmBy aXNjdjogcHRyYWNlOiBBZGQgaHcgYnJlYWtwb2ludCByZWdzZXRgCmFuZApgcmlzY3Y6IHB0cmFj ZTogQWRkIGh3IGJyZWFrcG9pbnQgc3VwcG9ydGAKYXMgdGhleSBhcmUgc2lnbmlmaWNhbnRseSBz aW1wbGVyLgoKaHR0cHM6Ly9naXRodWIuY29tL01yLUJvc3NtYW4vbGludXgvY29tbWl0cy9kZXYv amVzc2Uvc2R0cmlnLXJlYmFzZS8KClRoYW5rcywKSmVzc2UgVGF1YmUKCj4gU2luZ2xlIHN0ZXBw aW5nIGlzIHJlYWR5IGFuZCB0ZXN0IGJ1dCB0byBmb2xsb3cgdGhpcyBwYXRjaCBzZXQuCj4gVmly dHVhbGl6YXRpb24gb2YgZGVidWcgdHJpZ2dlcnMgYXJlIHBlbmRpbmcKPgo+IFRoZSBTQkkgZGVi dWcgdHJpZ2dlciBleHRlbnNpb24gaXMgc3BlY2lmaWVkIGluIENoYXB0ZXIgMTkgb2YgdGhlIFNC SQo+IHNwZWNpZmljYXRpb246Cj4gICBodHRwczovL2dpdGh1Yi5jb20vcmlzY3Ytbm9uLWlzYS9y aXNjdi1zYmktZG9jL3JlbGVhc2VzL2Rvd25sb2FkL3YzLjAvcmlzY3Ytc2JpLnBkZgo+Cj4gVGhl IFNkdHJpZyBJU0EgaXMgcGFydCBvZiB0aGUgUklTQy1WIGRlYnVnIHNwZWNpZmljYXRpb246Cj4g ICBodHRwczovL2dpdGh1Yi5jb20vcmlzY3YvcmlzY3YtZGVidWctc3BlYwo+Cj4gQ2hhbmdlcyBm cm9tIHY1Ogo+ICAgLSBSZWJhc2VkIHRvIHY3LjItcmM2Cj4gICAtIFNpbXBsaWZpZWQgTWFjcm9z IGluIGh3X2JyZWFrcG9pbnQuaAo+ICAgLSBUb29rIGNhcmUgb2YgdGhlIHJldmlldyBjb21tZW50 cwo+ICAgLSBBZGRlZCBwdHJhY2Ugc3VwcG9ydCBmb3IgaGFyZHdhcmUgYnJlYWsvd2F0Y2hwb2lu dHMgKG5ldyBwYXRjaCkKPiAgICAgLSBQVFJBQ0VfR0VUUkVHU0VUL1NFVFJFR1NFVCB2aWEgTlRf UklTQ1ZfSFdfQlJFQUsgLyBOVF9SSVNDVl9IV19XQVRDSAo+ICAgICAtIFBUUkFDRV9HRVRIQlBS RUdTIC8gU0VUSEJQUkVHUyBmb3IgZGlyZWN0IHNpbmdsZS10cmlnZ2VyIGFjY2Vzcwo+ICAgICAt IEhBVkVfTUlYRURfQlJFQUtQT0lOVFNfUkVHUyBzZWxlY3RlZCAoYnJlYWsvd2F0Y2ggc2hhcmUg dHJpZ2dlciBwb29sKQo+ICAgICAtIGZsdXNoX3B0cmFjZV9od19icmVha3BvaW50IC8gcHRyYWNl X2h3X2NvcHlfdGhyZWFkIHdpcmVkIHVwCj4gICAtIEV4dGVuZGVkIHNlbGZ0ZXN0IHRvIGNvdmVy IHB0cmFjZS1iYXNlZCBodyBicmVhay93YXRjaHBvaW50IHBhdGhzIChuZXcgcGF0Y2gpCj4KPiBD aGFuZ2VzIGZyb20gdjQ6Cj4gICAtIFJlYmFzZWQgdG8gdjcuMi1yYzQKPiAgIC0gRml4ZWQgcnYz MiBidWlsZCBlcnJvcgo+ICAgLSBBZGRlZCBwcl9mbXQgdG8gcHJpbnQgS0JVSUxEX01PRE5BTUUK PiAgIC0gQ2hhbmdlZCB0eXBlIG9mIHNobWVtX3BhIHRvIHBoeXNfYWRkcl90Cj4gICAtIFVzZSBw ZXJfY3B1X3B0cl90b19waHlzIGluc3RlYWQgb2YgX19wYSBmb3IgcGVyLWNwdSBhbGxvY2F0ZWQg bWVtb3J5Cj4gICAtIFByaW50IHN1Y2Nlc3NmdWwgcmVnaXN0cmF0aW9uL3VucmVnaXN0cmF0aW9u IG1lc3NhZ2Ugd2hlbiBubyBlcnJvcgo+ICAgLSBBZGRlZCBSSVNDLVYgREVCVUdHSU5HIHNlY3Rp b24gaW4gTUFJTlRBSU5FUlMgYW5kIGFkZGVkIG15c2VsZiBhcyBtYWludGFpbmVyCj4gICAtIEZp eGVkIHdhcm5pbmdzIGZyb20gY2hlY2twYXRjaC5wbCAtLXN0cmljdCBydW4KPgo+IENoYW5nZXMg ZnJvbSB2MzoKPiAgIC0gUmViYXNlZCB0byB2Ny4xLXJjMwo+ICAgLSBGb3Igd2F0Y2hwb2ludHMs IGNoZWNrIHRkYXRhMS5oaXQgdmlhIFNCSV9FWFRfREJUUl9UUklHX1JFQUQgYW5kIGtlZXAKPiAg ICAgU1RWQUwtYmFzZWQgbWF0Y2hpbmcgYXMgZmFsbGJhY2sKPiAgIC0gSW1wcm92ZWQgd2F0Y2hw b2ludCBtYXRjaGluZyB3aGVuIFNUVkFMIHJlcG9ydHMgdGhlIGxvd2VzdCBhY2Nlc3NlZCBhZGRy ZXNzCj4gICAgIGZvciB3aWRlciBtZW1vcnkgYWNjZXNzZXMKPiAgIC0gUHJvZ3JhbSBleGVjdXRl IGJyZWFrcG9pbnRzIHdpdGggU0laRT0wIChtYXRjaCBhbnkgc2l6ZSkgdG8gYXZvaWQgbWlzc2Vz Cj4gICAgIHdpdGggMTYtYml0L2NvbXByZXNzZWQgaW5zdHJ1Y3Rpb24gYWRkcmVzc2VzCj4gICAt IFVwZGF0ZWQgc2VsZnRlc3QgdG8gYXZvaWQgZGVhZGxvY2sgYnkgcmVwbGFjaW5nIHVuYm91bmRl ZCBzZW1fd2FpdCgpIHdpdGgKPiAgICAgc2VtX3RpbWVkd2FpdCgpIHRpbWVvdXQgaGFuZGxpbmcK PiAgIC0gVXBkYXRlZCBzZWxmdGVzdCBicmVha3BvaW50IGZ1bmN0aW9uIHNvIGl0IGNhbm5vdCBi ZSBpbmxpbmVkIG9yIG9wdGltaXplZCBhd2F5Cj4KPiBDaGFuZ2VzIGZyb20gdjI6Cj4gICAtIFJl YmFzZWQgdG8gdjcuMC1yYzEKPiAgIC0gRml4ZWQgd2FybmluZ3MgZnJvbSBjaGVja3BhdGNoLnBs IC0tc3RyaWN0IHJ1bgo+Cj4gQ2hhbmdlcyBmcm9tIHYxOgo+ICAgLSBUaGUgcGF0Y2ggYWRkaW5n IHRoZSBTQkkgZXh0ZW5zaW9uIGFuZCBmdW5jdGlvbiBJRHMgaXMgYWxyZWFkeSBtZXJnZWQ7IHRo aXMKPiAgICAgc2VyaWVzIGJ1aWxkcyBvbiB0b3Agb2YgdGhhdAo+ICAgLSBBZGRlZCBicmVha3Bv aW50IHNlbGZ0ZXN0IGluIHRvb2xzL3Rlc3Rpbmcvc2VsZnRlc3RzL2JyZWFrcG9pbnRzLwo+Cj4g SG93IHRvIHVzZToKPiB+fn5+fn5+fn5+fgo+IE9wZW5TQkk6Cj4gICBodHRwczovL2dpdGh1Yi5j b20vcmlzY3Ytc29mdHdhcmUtc3JjL29wZW5zYmkuZ2l0Cj4KPiBRRU1VOgo+ICAgaHR0cHM6Ly9n aXRodWIuY29tL3FlbXUvcWVtdS5naXQKPgo+IExpbnV4IEtlcm5lbDoKPiAgIEFwcGx5IHRoZXNl IHBhdGNoZXMgb24gdG9wIG9mIHY3LjItcmM2Lgo+Cj4gSG93IHRvIHRlc3Q6Cj4gfn5+fn5+fn5+ fn4KPiBGcm9tIHRoZSBMaW51eCBrZXJuZWwgZGlyZWN0b3J5LCBmaXJzdCBpbnN0YWxsIHRoZSBV QVBJIGhlYWRlcnMgKHJlcXVpcmVkIG9uIGEKPiBmcmVzaCB0cmVlIHNvIHRoZSBjb21waWxlciBj YW4gbG9jYXRlIDxhc20vcHRyYWNlLmg+IGFuZCB0aGUgbmV3Cj4gTlRfUklTQ1ZfSFdfQlJFQUsv V0FUQ0ggZGVmaW5pdGlvbnMgdmlhIEtIRFJfSU5DTFVERVMpOgo+Cj4gICBtYWtlIGhlYWRlcnMK Pgo+IFRoZW4gYnVpbGQgdGhlIHNlbGZ0ZXN0Ogo+Cj4gICBtYWtlIC1DIHRvb2xzL3Rlc3Rpbmcv c2VsZnRlc3RzL2JyZWFrcG9pbnRzLwo+Cj4gVGhpcyBwcm9kdWNlcyBicmVha3BvaW50X3Rlc3Rf cmlzY3YgdW5kZXIgdGhlIHNhbWUgZGlyZWN0b3J5LiBMb2FkIGl0IG9uIHRoZQo+IHRhcmdldCBh bmQgcnVuLiBTYW1wbGUgb3V0cHV0Ogo+Cj4gICAjIC9hcHBzL2JyZWFrcG9pbnRfdGVzdF9yaXNj dgo+ICAgIyBbcGVyZl9ldmVudF06IEJyZWFrcG9pbnQgdGVzdCBwYXNzZWQhCj4gICAjIFtwZXJm X2V2ZW50XTogV2F0Y2hwb2ludCB0ZXN0IHBhc3NlZCEKPiAgICMgW3B0cmFjZV06IEJyZWFrcG9p bnQgdGVzdCBwYXNzZWQhCj4gICAjIHB0cmFjZShQVFJBQ0VfR0VUUkVHU0VUKTogTnVtYmVyIG9m IHdhdGNocG9pbnRzOiAyCj4gICAjIHB0cmFjZShQVFJBQ0VfR0VUUkVHU2V0KTogYWRkcjogMHg4 Mjg4OCBjb250cm9sOiAweDgwODAKPiAgICMgW3B0cmFjZV06IFdhdGNocG9pbnQgdGVzdCBwYXNz ZWQhCj4gICAjIFtoYnByZWdzXSBicmVha3BvaW50IHJlYWRiYWNrOiBhZGRyPTB4MTA0NzIgdHlw ZT00IGxlbj00IGN0cmw9MAo+ICAgIyBbaGJwcmVnc106IEJyZWFrcG9pbnQgdGVzdCBwYXNzZWQh Cj4gICAjIFtoYnByZWdzXSB3YXRjaHBvaW50IHJlYWRiYWNrOiBhZGRyPTB4ODI4ODggdHlwZT0y IGxlbj04IGN0cmw9MAo+ICAgIyBbaGJwcmVnc106IFdhdGNocG9pbnQgdGVzdCBwYXNzZWQhCj4K PiBIaW1hbnNodSBDaGF1aGFuICg1KToKPiAgIHJpc2N2OiBJbnRyb2R1Y2Ugc3VwcG9ydCBmb3Ig aGFyZHdhcmUgYnJlYWsvd2F0Y2hwb2ludHMKPiAgIHJpc2N2OiBBZGQgYnJlYWtwb2ludCBhbmQg d2F0Y2hwb2ludCB0ZXN0IGZvciByaXNjdgo+ICAgcmlzY3Y6IHB0cmFjZSBzdXBwb3J0IGZvciBo YXJkd2FyZSBicmVhay93YXRjaHBvaW50cwo+ICAgc2VsZnRlc3RzL2JyZWFrcG9pbnRzOiBleHRl bmQgcmlzY3YgdGVzdCBmb3IgcHRyYWNlIGh3Cj4gICAgIGJyZWFrL3dhdGNocG9pbnRzCj4gICBN QUlOVEFJTkVSUzogQWRkIGVudHJ5IGZvciBSSVNDLVYgRGVidWdnaW5nCj4KPiAgTUFJTlRBSU5F UlMgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHwgICA5ICsKPiAgYXJjaC9yaXNj di9LY29uZmlnICAgICAgICAgICAgICAgICAgICAgICAgICAgIHwgICAyICsKPiAgYXJjaC9yaXNj di9pbmNsdWRlL2FzbS9od19icmVha3BvaW50LmggICAgICAgIHwgMjk5ICsrKysrKysKPiAgYXJj aC9yaXNjdi9pbmNsdWRlL2FzbS9rZGVidWcuaCAgICAgICAgICAgICAgIHwgICAzICstCj4gIGFy Y2gvcmlzY3YvaW5jbHVkZS9hc20vcHJvY2Vzc29yLmggICAgICAgICAgICB8ICAxOCArCj4gIGFy Y2gvcmlzY3YvaW5jbHVkZS91YXBpL2FzbS9wdHJhY2UuaCAgICAgICAgICB8ICA1MyArKwo+ICBh cmNoL3Jpc2N2L2tlcm5lbC9NYWtlZmlsZSAgICAgICAgICAgICAgICAgICAgfCAgIDEgKwo+ICBh cmNoL3Jpc2N2L2tlcm5lbC9od19icmVha3BvaW50LmMgICAgICAgICAgICAgfCA2NzcgKysrKysr KysrKysrKysrKwo+ICBhcmNoL3Jpc2N2L2tlcm5lbC9wcm9jZXNzLmMgICAgICAgICAgICAgICAg ICAgfCAgIDUgKwo+ICBhcmNoL3Jpc2N2L2tlcm5lbC9wdHJhY2UuYyAgICAgICAgICAgICAgICAg ICAgfCA1MDcgKysrKysrKysrKysrCj4gIGFyY2gvcmlzY3Yva2VybmVsL3RyYXBzLmMgICAgICAg ICAgICAgICAgICAgICB8ICAgNiArCj4gIGluY2x1ZGUvdWFwaS9saW51eC9lbGYuaCAgICAgICAg ICAgICAgICAgICAgICB8ICAgNCArCj4gIHRvb2xzL2luY2x1ZGUvdWFwaS9saW51eC9lbGYuaCAg ICAgICAgICAgICAgICB8ICAgMiArCj4gIHRvb2xzL3Rlc3Rpbmcvc2VsZnRlc3RzL2JyZWFrcG9p bnRzL01ha2VmaWxlICB8ICAgNSArCj4gIC4uLi9icmVha3BvaW50cy9icmVha3BvaW50X3Rlc3Rf cmlzY3YuYyAgICAgICB8IDc2NSArKysrKysrKysrKysrKysrKysKPiAgMTUgZmlsZXMgY2hhbmdl ZCwgMjM1NSBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gIGNyZWF0ZSBtb2RlIDEwMDY0 NCBhcmNoL3Jpc2N2L2luY2x1ZGUvYXNtL2h3X2JyZWFrcG9pbnQuaAo+ICBjcmVhdGUgbW9kZSAx MDA2NDQgYXJjaC9yaXNjdi9rZXJuZWwvaHdfYnJlYWtwb2ludC5jCj4gIGNyZWF0ZSBtb2RlIDEw MDY0NCB0b29scy90ZXN0aW5nL3NlbGZ0ZXN0cy9icmVha3BvaW50cy9icmVha3BvaW50X3Rlc3Rf cmlzY3YuYwo+Cj4gLS0KPiAyLjQzLjAKPgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fCmxpbnV4LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBs aXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlz dGluZm8vbGludXgtcmlzY3YK