From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7BF75188012; Mon, 28 Oct 2024 05:46:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=150.107.74.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730094419; cv=none; b=COxE/COPS10geHOSypV8gB5IYhGElGQSW8rJpB8zHdsk+B2Ec2pH3eHUMKXNHfidtivPYeaXHWg+juOB7IKILxJmtW2c6jJx6yvLTGTYtgeQFTLOVtCjzapy116p/cjRqfZBg2fq9Wy7cJEFHSyUHFgB10/4HdIjks4fSHz5Tp8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730094419; c=relaxed/simple; bh=OMDUt1JiIM60tJUhcbGeIusKB8rIA6ft0n0PF1UfVyE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=Ei9PKDD1JLIMK47uZ6h99f6FjF0QmVe+OMKWG3gKuy05JEgE1vb8lNBGka3ZGk0Gs4EUctxIq7P/S1e8QBnXSBZaqmFXbN5jM5YNC+JQD/w907VAVptUAEX2ADuhTzuqatpCMe4+SIidpubKa+vtzDyd7OJ+RcOX7DHwTuBsU9A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au; spf=pass smtp.mailfrom=ellerman.id.au; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b=hu8ku3x0; arc=none smtp.client-ip=150.107.74.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="hu8ku3x0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1730094411; bh=OMDUt1JiIM60tJUhcbGeIusKB8rIA6ft0n0PF1UfVyE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=hu8ku3x09JE6p7y7v7trn5lIhE4uz+agLI0UYSa1bU/zp+ThOALYVhMxPwrnpLjDa VxnyNnMyeobW4bT6UPlNhR49HcUcXRCjahiOVVAFfrVZkQDF9GTpr0VF44VJfUXpue H0h4nwwHMh9m2CqFwdu9zoQ0EsQ+oBQNTzP15qgIoEMh18Ckm0ely29JAZrK/9fyZh lS5CGxQtQJOgDFGkZwdOsHyT8BPjXIVMaMpovWqwnWLrzpfVIQaCMVDucRqL/eGsL/ 11olKF/2J3u0KwtipWgl2mVLRvKW1x5nJNLC2ti8gELad/8gziU37xEtdnNEtUqowl F1wvCaFKCzarA== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4XcMpL4SL7z4x6k; Mon, 28 Oct 2024 16:46:50 +1100 (AEDT) From: Michael Ellerman To: Hari Bathini , Alexei Starovoitov Cc: linuxppc-dev , bpf , linux-trace-kernel , Linux Kbuild mailing list , LKML , "Naveen N. Rao" , Mark Rutland , Daniel Borkmann , Masahiro Yamada , Nicholas Piggin , Alexei Starovoitov , Steven Rostedt , Andrii Nakryiko , Christophe Leroy , Vishal Chourasia , Mahesh J Salgaonkar , Masami Hiramatsu Subject: Re: [PATCH v5 17/17] powerpc64/bpf: Add support for bpf trampolines In-Reply-To: References: <20240915205648.830121-1-hbathini@linux.ibm.com> <20240915205648.830121-18-hbathini@linux.ibm.com> <32249e74-633d-4757-8931-742b682a63d3@linux.ibm.com> <7afc9cc7-95cd-45c7-b748-28040206d9a0@linux.ibm.com> <875xq07qv6.fsf@mail.lhotse> <28d39117-c512-4165-b082-4ca54da7ba6c@linux.ibm.com> Date: Mon, 28 Oct 2024 16:46:40 +1100 Message-ID: <87r080srsv.fsf@mpe.ellerman.id.au> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 SGFyaSBCYXRoaW5pIDxoYmF0aGluaUBsaW51eC5pYm0uY29tPiB3cml0ZXM6DQo+IE9uIDEwLzEw LzI0IDM6MDkgcG0sIEhhcmkgQmF0aGluaSB3cm90ZToNCj4+IE9uIDEwLzEwLzI0IDU6NDggYW0s IE1pY2hhZWwgRWxsZXJtYW4gd3JvdGU6DQo+Pj4gQWxleGVpIFN0YXJvdm9pdG92IDxhbGV4ZWku c3Rhcm92b2l0b3ZAZ21haWwuY29tPiB3cml0ZXM6DQo+Pj4+IE9uIFR1ZSwgT2N0IDEsIDIwMjQg YXQgMTI6MTjigK9BTSBIYXJpIEJhdGhpbmkgPGhiYXRoaW5pQGxpbnV4LmlibS5jb20+IA0KPj4+ PiB3cm90ZToNCj4+Pj4+IE9uIDMwLzA5LzI0IDY6MjUgcG0sIEFsZXhlaSBTdGFyb3ZvaXRvdiB3 cm90ZToNCj4+Pj4+PiBPbiBTdW4sIFNlcCAyOSwgMjAyNCBhdCAxMDozM+KAr1BNIEhhcmkgQmF0 aGluaSANCj4+Pj4+PiA8aGJhdGhpbmlAbGludXguaWJtLmNvbT4gd3JvdGU6DQo+Pj4+Pj4+IE9u IDE3LzA5LzI0IDE6MjAgcG0sIEFsZXhlaSBTdGFyb3ZvaXRvdiB3cm90ZToNCj4+Pj4+Pj4+IE9u IFN1biwgU2VwIDE1LCAyMDI0IGF0IDEwOjU44oCvUE0gSGFyaSBCYXRoaW5pIA0KPj4+Pj4+Pj4g PGhiYXRoaW5pQGxpbnV4LmlibS5jb20+IHdyb3RlOg0KPj4+Pj4+Pj4+DQo+Pj4+Pj4+Pj4gKw0K Pj4+Pj4+Pj4+ICvCoMKgwqDCoMKgwqAgLyoNCj4+Pj4+Pj4+PiArwqDCoMKgwqDCoMKgwqAgKiBH ZW5lcmF0ZWQgc3RhY2sgbGF5b3V0Og0KPj4+Pj4+Pj4+ICvCoMKgwqDCoMKgwqDCoCAqDQo+Pj4+ Pj4+Pj4gK8KgwqDCoMKgwqDCoMKgICogZnVuYyBwcmV2IGJhY2sgY2hhaW7CoMKgwqDCoMKgwqDC oMKgIFsgYmFjayBjaGFpbsKgwqDCoMKgwqDCoMKgIF0NCj4+Pj4+Pj4+PiArwqDCoMKgwqDCoMKg wqAgKsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqAgW8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBdDQo+Pj4+Pj4+Pj4g K8KgwqDCoMKgwqDCoMKgICogYnBmIHByb2cgcmVkem9uZS90YWlsY2FsbGNudCBbIC4uLsKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgXSA2NCANCj4+Pj4+Pj4+PiBieXRlcyAoNjQtYml0IHBv d2VycGMpDQo+Pj4+Pj4+Pj4gK8KgwqDCoMKgwqDCoMKgICrCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIFvCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqAgXSAtLQ0KPj4+Pj4+Pj4gLi4uDQo+Pj4+Pj4+Pj4gKw0KPj4+Pj4+ Pj4+ICvCoMKgwqDCoMKgwqAgLyogRHVtbXkgZnJhbWUgc2l6ZSBmb3IgcHJvcGVyIHVud2luZCAt IGluY2x1ZGVzIDY0LSANCj4+Pj4+Pj4+PiBieXRlcyByZWQgem9uZSBmb3IgNjQtYml0IHBvd2Vy cGMgKi8NCj4+Pj4+Pj4+PiArwqDCoMKgwqDCoMKgIGJwZl9kdW1teV9mcmFtZV9zaXplID0gU1RB Q0tfRlJBTUVfTUlOX1NJWkUgKyA2NDsNCj4+Pj4+Pj4+DQo+Pj4+Pj4+PiBXaGF0IGlzIHRoZSBn b2FsIG9mIHN1Y2ggYSBsYXJnZSAicmVkIHpvbmUiID8NCj4+Pj4+Pj4+IFRoZSBrZXJuZWwgc3Rh Y2sgaXMgYSBsaW1pdGVkIHJlc291cmNlLg0KPj4+Pj4+Pj4gV2h5IHJlc2VydmUgNjQgYnl0ZXMg Pw0KPj4+Pj4+Pj4gdGFpbCBjYWxsIGNudCBjYW4gcHJvYmFibHkgYmUgb3B0aW9uYWwgYXMgd2Vs bC4NCj4+Pj4+Pj4NCj4+Pj4+Pj4gSGkgQWxleGVpLCB0aGFua3MgZm9yIHJldmlld2luZy4NCj4+ Pj4+Pj4gRldJVywgdGhlIHJlZHpvbmUgb24gcHBjNjQgaXMgMjg4IGJ5dGVzLiBCUEYgSklUIGZv ciBwcGM2NCB3YXMgdXNpbmcNCj4+Pj4+Pj4gYSByZWR6b25lIG9mIDgwIGJ5dGVzIHNpbmNlIHRh aWxjYWxsIHN1cHBvcnQgd2FzIGludHJvZHVjZWQgWzFdLg0KPj4+Pj4+PiBJdCBjYW1lIGRvd24g dG8gNjQgYnl0ZXMgdGhhbmtzIHRvIFsyXS4gVGhlIHJlZCB6b25lIGlzIGJlaW5nIHVzZWQNCj4+ Pj4+Pj4gdG8gc2F2ZSBOVlJzIGFuZCB0YWlsIGNhbGwgY291bnQgd2hlbiBhIHN0YWNrIGlzIG5v dCBzZXR1cC4gSSBkbw0KPj4+Pj4+PiBhZ3JlZSB0aGF0IHdlIHNob3VsZCBsb29rIGF0IG9wdGlt aXppbmcgaXQgZnVydGhlci4gRG8geW91IHRoaW5rDQo+Pj4+Pj4+IHRoZSBvcHRpbWl6YXRpb24g c2hvdWxkIGdvIGFzIHBhcnQgb2YgUFBDNjQgdHJhbXBvbGluZSBlbmFibGVtZW50DQo+Pj4+Pj4+ IGJlaW5nIGRvbmUgaGVyZSBvciBzaG91bGQgdGhhdCBiZSB0YWtlbiB1cCBhcyBhIHNlcGFyYXRl IGl0ZW0sIG1heWJlPw0KPj4+Pj4+DQo+Pj4+Pj4gVGhlIGZvbGxvdyB1cCBpcyBmaW5lLg0KPj4+ Pj4+IEl0IGp1c3Qgb2RkIHRvIG1lIHRoYXQgd2UgY3VycmVudGx5IGhhdmU6DQo+Pj4+Pj4NCj4+ Pj4+PiBbwqDCoCB1bnVzZWQgcmVkIHpvbmUgXSAyMDggYnl0ZXMgcHJvdGVjdGVkDQo+Pj4+Pj4N Cj4+Pj4+PiBJIHNpbXBseSBkb24ndCB1bmRlcnN0YW5kIHdoeSB3ZSBuZWVkIHRvIHdhc3RlIHRo aXMgbXVjaCBzdGFjayBzcGFjZS4NCj4+Pj4+PiBXaHkgY2FuJ3QgaXQgYmUgemVybyB0b2RheSA/ DQo+Pj4+Pg0KPj4+Pj4gVGhlIEFCSSBmb3IgcHBjNjQgaGFzIGEgcmVkem9uZSBvZiAyODggYnl0 ZXMgYmVsb3cgdGhlIGN1cnJlbnQNCj4+Pj4+IHN0YWNrIHBvaW50ZXIgdGhhdCBjYW4gYmUgdXNl ZCBhcyBhIHNjcmF0Y2ggYXJlYSB1bnRpbCBhIG5ldw0KPj4+Pj4gc3RhY2sgZnJhbWUgaXMgY3Jl YXRlZC4gU28sIG5vIHdhc3RhZ2Ugb2Ygc3RhY2sgc3BhY2UgYXMgc3VjaC4NCj4+Pj4+IEl0IGlz IGp1c3QgcmVkIHpvbmUgdGhhdCBjYW4gYmUgdXNlZCBiZWZvcmUgYSBuZXcgc3RhY2sgZnJhbWUN Cj4+Pj4+IGlzIGNyZWF0ZWQuIFRoZSBjb21tZW50IHRoZXJlIGlzIG9ubHkgdG8gc2hvdyBob3cg cmVkem9uZSBpcw0KPj4+Pj4gYmVpbmcgdXNlZCBpbiBwcGM2NCBCUEYgSklULiBJIHRoaW5rIHRo ZSBjb25mdXNpb24gaXMgd2l0aCB0aGUNCj4+Pj4+IG1lbnRpb24gb2YgIjIwOCBieXRlcyIgYXMg cHJvdGVjdGVkLiBBcyBub3QgYWxsIG9mIHRoYXQgc2NyYXRjaA0KPj4+Pj4gYXJlYSBpcyB1c2Vk LCBpdCBtZW50aW9ucyB0aGUgcmVtYWluaW5nIGFzIHVudXNlZC4gRXNzZW50aWFsbHkNCj4+Pj4+ IDI4OCBieXRlcyBiZWxvdyBjdXJyZW50IHN0YWNrIHBvaW50ZXIgaXMgcHJvdGVjdGVkIGZyb20g ZGVidWdnZXJzDQo+Pj4+PiBhbmQgaW50ZXJydXB0IGNvZGUgKHJlZCB6b25lKS4gTm90ZSB0aGF0 IGl0IHNob3VsZCBiZSAyMjQgYnl0ZXMNCj4+Pj4+IG9mIHVudXNlZCByZWQgem9uZSBpbnN0ZWFk IG9mIDIwOCBieXRlcyBhcyByZWQgem9uZSB1c2FnZSBpbg0KPj4+Pj4gcHBjNjQgQlBGIEpJVCBj b21lIGRvd24gZnJvbSA4MCBieXRlcyB0byA2NCBieXRlcyBzaW5jZSBbMl0uDQo+Pj4+PiBIb3Bl IHRoYXQgY2xlYXJzIHRoZSBtaXN1bmRlcnN0YW5kaW5nLi4NCj4+Pj4NCj4+Pj4gSSBzZWUuIFRo YXQgbWFrZXMgc2Vuc2UuIFNvIGl0J3Mgc2ltaWxhciB0byBhbWQ2NCByZWQgem9uZSwNCj4+Pj4g YnV0IHRoZXJlIHdlIGhhdmUgYW4gaXNzdWUgd2l0aCBpcnFzLCBoZW5jZSB0aGUga2VybmVsIGlz DQo+Pj4+IGNvbXBpbGVkIHdpdGggLW1uby1yZWQtem9uZS4NCj4+Pg0KPj4+IEkgYXNzdW1lIHRo YXQgaXNzdWUgaXMgdGhhdCB0aGUgaW50ZXJydXB0IGVudHJ5IHVuY29uZGl0aW9uYWxseSB3cml0 ZXMNCj4+PiBzb21lIGRhdGEgYmVsb3cgdGhlIHN0YWNrIHBvaW50ZXIsIGRpc3JlZ2FyZGluZyB0 aGUgcmVkIHpvbmU/DQo+Pj4NCj4+Pj4gSSBndWVzcyBwcGMgYWx3YXlzIGhhcyBhIGRpZmZlcmVu dCBpbnRlcnJ1cHQgc3RhY2sgYW5kDQo+Pj4+IGl0J3Mgbm90IGFuIGlzc3VlPw0KPj4+DQo+Pj4g Tm8sIHRoZSBpbnRlcnJ1cHQgZW50cnkgYWxsb2NhdGVzIGEgZnJhbWUgdGhhdCBpcyBiaWcgZW5v dWdoIHRvIGNvdmVyDQo+Pj4gdGhlIHJlZCB6b25lIGFzIHdlbGwgYXMgdGhlIHNwYWNlIGl0IG5l ZWRzIHRvIHNhdmUgcmVnaXN0ZXJzLg0KPj4+DQo+Pj4gU2VlIFNUQUNLX0lOVF9GUkFNRV9TSVpF IHdoaWNoIGluY2x1ZGVzIEtFUk5FTF9SRURaT05FX1NJWkU6DQo+Pj4NCj4+PiDCoMKgIGh0dHBz Oi8vZ2l0Lmtlcm5lbC5vcmcvcHViL3NjbS9saW51eC9rZXJuZWwvZ2l0L3RvcnZhbGRzL2xpbnV4 LmdpdC8gDQo+Pj4gdHJlZS9hcmNoL3Bvd2VycGMvaW5jbHVkZS9hc20vcHRyYWNlLmg/IA0KPj4+ IGNvbW1pdD04Y2YwYjkzOTE5ZTEzZDFlOGQ0NDY2ZWI0MDgwYTRjNGQ5ZDY2ZDdiI24xNjUNCj4+ Pg0KPj4+IFdoaWNoIGlzIHJlbmFtZWQgdG8gSU5UX0ZSQU1FX1NJWkUgaW4gYXNtLW9mZnNldHMu YyBhbmQgdGhlbiBpcyB1c2VkIGluDQo+Pj4gdGhlIGludGVycnVwdCBlbnRyeSBoZXJlOg0KPj4+ DQo+Pj4gwqDCoCBodHRwczovL2dpdC5rZXJuZWwub3JnL3B1Yi9zY20vbGludXgva2VybmVsL2dp dC90b3J2YWxkcy9saW51eC5naXQvIA0KPj4+IHRyZWUvYXJjaC9wb3dlcnBjL2tlcm5lbC9leGNl cHRpb25zLTY0cy5TPyANCj4+PiBjb21taXQ9OGNmMGI5MzkxOWUxM2QxZThkNDQ2NmViNDA4MGE0 YzRkOWQ2NmQ3YiNuNDk3DQo+PiANCj4+IFRoYW5rcyBmb3IgY2xhcmlmeWluZyB0aGF0LCBNaWNo YWVsLg0KPj4gT25seSBhc3luYyBpbnRlcnJ1cHQgaGFuZGxlcnMgdXNlIGRpZmZlcmVudCBpbnRl cnJ1cHQgc3RhY2tzLCByaWdodD8NCj4NCj4gLi4uIGFuZCBzZXBhcmF0ZSBlbWVyZ2VuY3kgc3Rh Y2sgZm9yIHNvbWUgc3BlY2lhbCBjYXNlcy4uLg0KDQpUaGVyZSBpc24ndCBhIG5lYXQgcnVsZSBs aWtlIHN5bmMvYXN5bmMuDQoNCk1vc3QgaW50ZXJydXB0cyB1c2UgdGhlIG5vcm1hbCBrZXJuZWwg c3RhY2ssIHdoZXRoZXIgc3luYyBvciBhc3luYy4NCg0KRXh0ZXJuYWwgaW50ZXJydXB0cyBzd2l0 Y2ggdG8gYSBzZXBhcmF0ZSBoYXJkIGludGVycnVwdCBzdGFjaw0KKGhhcmRpcnFfY3R4KSBpbiBj YWxsX2RvX2lycSgpLCBidXQgb25seSBhZnRlciBjb21pbmcgaW4gb24gdGhlIGtlcm5lbA0Kc3Rh Y2sgZmlyc3QuDQoNClNvbWUgaW50ZXJydXB0cyB1c2UgdGhlIGVtZXJnZW5jeSBzdGFjayAoaW4g c29tZSBjYXNlcyksIGVnLiBITUksIHNvZnQNCk5NSSAoZmFrZSksIFRNIGJhZCB0aGluZyAocHJv Z3JhbSBjaGVjayksIG9yIHRoZWlyIG93biBzdGFjaywgc3lzdGVtDQpyZXNldCAobm1pX2VtZXJn ZW5jeV9zcCksIG1hY2hpbmUgY2hlY2sgKG1jX2VtZXJnZW5jeV9zcCkuDQoNCmNoZWVycw0K