Re: [PATCH v2 3/3] RISC-V: KVM: Reset the SBI extension when disable it
Anup Patel <[email protected]> Wed, 29 Jul 2026 13:32:40 +0530
| Newsgroups | org.infradead.lists.kvm-riscv,org.infradead.lists.linux-riscv,org.kernel.vger.kvm,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CAAhSdy3qnvWF1cdxJxnJxR9jf0_BUpKbauNAuJcY_AAVaJw9AQ@mail.gmail.com> |
T24gTW9uLCBKdWwgNiwgMjAyNiBhdCA3OjQy4oCvQU0gSW5vY2hpIEFtYW90byA8aW5vY2hpYW1h QGdtYWlsLmNvbT4gd3JvdGU6Cj4KPiBUaGUgU0JJIGV4dGVuc2lvbiB2YWxpZGF0aW9uIGNhbGxi YWNrIGNhbiBvbmx5IGZpeCB0aGUgcGFyYW1ldGVyIGlmCj4gdGhlIGV4dGVuc2lvbiBpcyBlbmFi bGVkLiBIb3dldmVyLCBpZiB0aGUgZXh0ZW5zaW9uIGlzIGRpc2FibGVkIGFmdGVyCj4gbW9kaWZ0 eSBzb21lIHBhcmFtZXRlcnMsIHRoZSBzdGF0ZSBvZiB0aGUgZXh0ZW5zaW9uIGlzIHN0aWxsIGJy b2tlbi4KPgo+IFJlc2V0IHRoZSBleHRlbnNpb24gd2hlbiB0aGUgZXh0ZW5pb24gaXMgZGlzYWJs ZWQgc28gaXQgY2FuIGhhdmUKCnMvZXh0ZW5pb24vZXh0ZW5zaW9uLwoKPiBhIGNsZWFyIGNvbnRl eHQuCj4KPiBTaWduZWQtb2ZmLWJ5OiBJbm9jaGkgQW1hb3RvIDxpbm9jaGlhbWFAZ21haWwuY29t Pgo+IC0tLQo+ICBhcmNoL3Jpc2N2L2t2bS92Y3B1X3NiaS5jIHwgMTAgKysrKysrKysrKwo+ICAx IGZpbGUgY2hhbmdlZCwgMTAgaW5zZXJ0aW9ucygrKQo+Cj4gZGlmZiAtLWdpdCBhL2FyY2gvcmlz Y3Yva3ZtL3ZjcHVfc2JpLmMgYi9hcmNoL3Jpc2N2L2t2bS92Y3B1X3NiaS5jCj4gaW5kZXggYjcz N2U5YTdhMTJhLi4zZWI3YjdjNTcwNTkgMTAwNjQ0Cj4gLS0tIGEvYXJjaC9yaXNjdi9rdm0vdmNw dV9zYmkuYwo+ICsrKyBiL2FyY2gvcmlzY3Yva3ZtL3ZjcHVfc2JpLmMKPiBAQCAtMjIxLDYgKzIy MSw3IEBAIHN0YXRpYyBpbnQgcmlzY3ZfdmNwdV9zZXRfc2JpX2V4dF9zaW5nbGUoc3RydWN0IGt2 bV92Y3B1ICp2Y3B1LAo+ICB7Cj4gICAgICAgICBzdHJ1Y3Qga3ZtX3ZjcHVfc2JpX2NvbnRleHQg KnNjb250ZXh0ID0gJnZjcHUtPmFyY2guc2JpX2NvbnRleHQ7Cj4gICAgICAgICBjb25zdCBzdHJ1 Y3Qga3ZtX3Jpc2N2X3NiaV9leHRlbnNpb25fZW50cnkgKnNleHQ7Cj4gKyAgICAgICBjb25zdCBz dHJ1Y3Qga3ZtX3ZjcHVfc2JpX2V4dGVuc2lvbiAqZXh0Owo+Cj4gICAgICAgICBpZiAocmVnX3Zh bCAhPSAxICYmIHJlZ192YWwgIT0gMCkKPiAgICAgICAgICAgICAgICAgcmV0dXJuIC1FSU5WQUw7 Cj4gQEAgLTIyOSw2ICsyMzAsMTUgQEAgc3RhdGljIGludCByaXNjdl92Y3B1X3NldF9zYmlfZXh0 X3NpbmdsZShzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsCj4gICAgICAgICBpZiAoIXNleHQgfHwgc2Nv bnRleHQtPmV4dF9zdGF0dXNbc2V4dC0+ZXh0X2lkeF0gPT0gS1ZNX1JJU0NWX1NCSV9FWFRfU1RB VFVTX1VOQVZBSUxBQkxFKQo+ICAgICAgICAgICAgICAgICByZXR1cm4gLUVOT0VOVDsKPgo+ICsg ICAgICAgZXh0ID0gc2V4dC0+ZXh0X3B0cjsKPiArCj4gKyAgICAgICBpZiAoIXJlZ192YWwgJiYg c2NvbnRleHQtPmV4dF9zdGF0dXNbc2V4dC0+ZXh0X2lkeF0gPT0gS1ZNX1JJU0NWX1NCSV9FWFRf U1RBVFVTX0VOQUJMRUQpIHsKPiArICAgICAgICAgICAgICAgaWYgKGV4dC0+cmVzZXQpIHsKPiAr ICAgICAgICAgICAgICAgICAgICAgICBleHQtPnJlc2V0KHZjcHUpOwo+ICsgICAgICAgICAgICAg ICAgICAgICAgIHZjcHUtPmFyY2guY3NyX2RpcnR5ID0gdHJ1ZTsKCkxldCdzIG5vdCBibGluZGx5 IHNldCAiY3NyX2RpcnR5IiB3aGVuIGFueSBTQkkgZXh0ZW5zaW9uIGlzIGRpc2FibGVkLAppbnN0 ZWFkIHdlIHNob3VsZCBzZXQgImNzcl9kaXJ0cnkiIGluIGt2bV9zYmlfZXh0X2Z3ZnRfcmVzZXQo KSAoanVzdApsaWtlIHdlIGRvIGluIGt2bV9zYmlfZXh0X2Z3ZnRfc2V0X3JlZygpKS4KCj4gKyAg ICAgICAgICAgICAgIH0KPiArICAgICAgIH0KPiArCj4gICAgICAgICBzY29udGV4dC0+ZXh0X3N0 YXR1c1tzZXh0LT5leHRfaWR4XSA9IChyZWdfdmFsKSA/Cj4gICAgICAgICAgICAgICAgICAgICAg ICAgS1ZNX1JJU0NWX1NCSV9FWFRfU1RBVFVTX0VOQUJMRUQgOgo+ICAgICAgICAgICAgICAgICAg ICAgICAgIEtWTV9SSVNDVl9TQklfRVhUX1NUQVRVU19ESVNBQkxFRDsKPiAtLQo+IDIuNTUuMAo+ CgpSZWdhcmRzLApBbnVwCgotLSAKa3ZtLXJpc2N2IG1haWxpbmcgbGlzdAprdm0tcmlzY3ZAbGlz dHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2t2bS1yaXNjdgo=