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Fri, 07 Jun 2024 00:07:11 -0700 (PDT) MIME-Version: 1.0 References: <20240429092113.70695-1-betterman5240@gmail.com> In-Reply-To: <20240429092113.70695-1-betterman5240@gmail.com> From: Anup Patel Date: Fri, 7 Jun 2024 12:37:01 +0530 Message-ID: Subject: Re: [PATCH] RISC-V:KVM: Add AMO load/store access fault traps to redirect to guest To: Yu-Wei Hsu Cc: atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240607_000714_548688_9492C8F0 X-CRM114-Status: GOOD ( 16.32 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gTW9uLCBBcHIgMjksIDIwMjQgYXQgMjo1MeKAr1BNIFl1LVdlaSBIc3UgPGJldHRlcm1hbjUy NDBAZ21haWwuY29tPiB3cm90ZToKPgo+IFdoZW4gdW5oYW5kbGVkIEFNTyBsb2FkL3N0b3JlIGFj Y2VzcyBmYXVsdCB0cmFwcyBhcmUgbm90IGRlbGVnYXRlZCB0bwo+IFZTIG1vZGUgKGhlZGVsZWcp LCBNIG1vZGUgcmVkaXJlY3RzIHRoZW0gYmFjayB0byBTIG1vZGUuCj4gSG93ZXZlciwgdXBvbiBy ZXR1cm5pbmcgZnJvbSBNIG1vZGUsdGhlIEtWTSBleGVjdXRlZCBpbiBIUyBtb2RlIHRlcm1pbmF0 ZXMKPiBWUyBtb2RlIHNvZnR3YXJlLgo+IEtWTSBzaG91bGQgcmVkaXJlY3QgdHJhcHMgYmFjayB0 byBWUyBtb2RlIGFuZCBsZXQgdGhlIFZTIG1vZGUgdHJhcCBoYW5kbGVyCj4gZGV0ZXJtaW5lIHRo ZSBuZXh0IHN0ZXBzLgo+IFRoaXMgaXMgb25lIGFwcHJvYWNoIHRvIGhhbmRsaW5nIGFjY2VzcyBm YXVsdCB0cmFwcyBpbiBLVk0sCj4gbm90IG9ubHkgcmVkaXJlY3RpbmcgdGhlbSB0byBWUyBtb2Rl IG9yIHRlcm1pbmF0aW5nIGl0Lgo+Cj4gU2lnbmVkLW9mZi1ieTogWXUtV2VpIEhzdSA8YmV0dGVy bWFuNTI0MEBnbWFpbC5jb20+CgpPdmVyYWxsIHRoaXMgcGF0Y2ggbG9va3MgZ29vZCB0byBtZSBi dXQgdGhlIHBhdGNoIHN1YmplY3QgYW5kCmRlc2NyaXB0aW9uIGNhbiBmdXJ0aGVyIHNpbXBsaWZp ZWQgYXMgZm9sbG93czoKCiAgICBSSVNDLVY6IEtWTTogUmVkaXJlY3QgQU1PIGxvYWQvc3RvcmUg YWNjZXNzIGZhdWx0IHRyYXBzIHRvIGd1ZXN0CgogICAgVGhlIEtWTSBSSVNDLVYgZG9lcyBub3Qg ZGVsZWdhdGUgQU1PIGxvYWQvc3RvcmUgYWNjZXNzIGZhdWx0IHRyYXBzIHRvCiAgICBWUy1tb2Rl IChoZWRlbGVnKSBzbyB0eXBpY2FsbHkgTS1tb2RlIHRha2VzIHRoZXNlIHRyYXBzIGFuZCByZWRp cmVjdHMKICAgIHRoZW0gYmFjayB0byBIUy1tb2RlLiBIb3dldmVyLCB1cG9uIHJldHVybmluZyBm cm9tIE0tbW9kZSwgdGhlIEtWTQogICAgUklTQy1WIHJ1bm5pbmcgaW4gSFMtbW9kZSB0ZXJtaW5h dGVzIFZTLW1vZGUgc29mdHdhcmUuCgogICAgVGhlIEtWTSBSSVNDLVYgc2hvdWxkIHJlZGlyZWN0 IEFNTyBsb2FkL3N0b3JlIGFjY2VzcyBmYXVsdCB0cmFwcyBiYWNrCiAgICB0byBWUy1tb2RlIGFu ZCBsZXQgdGhlIFZTLW1vZGUgdHJhcCBoYW5kbGVyIGRldGVybWluZSB0aGUgbmV4dCBzdGVwcy4K CkkgaGF2ZSB0YWtlbiBjYXJlIG9mIHRoZSBhYm92ZSBhdCB0aGUgdGltZSBvZiBxdWV1aW5nIHRo aXMgcGF0Y2guCgpSZXZpZXdlZC1ieTogQW51cCBQYXRlbCA8YW51cEBicmFpbmZhdWx0Lm9yZz4K ClF1ZXVlZCB0aGlzIHBhdGNoIGZvciBMaW51eC02LjExCgpUaGFua3MsCkFudXAKCj4gLS0tCj4g IGFyY2gvcmlzY3Yva3ZtL3ZjcHVfZXhpdC5jIHwgMiArKwo+ICAxIGZpbGUgY2hhbmdlZCwgMiBp bnNlcnRpb25zKCspCj4KPiBkaWZmIC0tZ2l0IGEvYXJjaC9yaXNjdi9rdm0vdmNwdV9leGl0LmMg Yi9hcmNoL3Jpc2N2L2t2bS92Y3B1X2V4aXQuYwo+IGluZGV4IDI0MTU3MjJjMDFiOC4uZWY4YzVl M2VjOGEwIDEwMDY0NAo+IC0tLSBhL2FyY2gvcmlzY3Yva3ZtL3ZjcHVfZXhpdC5jCj4gKysrIGIv YXJjaC9yaXNjdi9rdm0vdmNwdV9leGl0LmMKPiBAQCAtMTg1LDYgKzE4NSw4IEBAIGludCBrdm1f cmlzY3ZfdmNwdV9leGl0KHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwgc3RydWN0IGt2bV9ydW4gKnJ1 biwKPiAgICAgICAgIGNhc2UgRVhDX0lOU1RfSUxMRUdBTDoKPiAgICAgICAgIGNhc2UgRVhDX0xP QURfTUlTQUxJR05FRDoKPiAgICAgICAgIGNhc2UgRVhDX1NUT1JFX01JU0FMSUdORUQ6Cj4gKyAg ICAgICBjYXNlIEVYQ19MT0FEX0FDQ0VTUzoKPiArICAgICAgIGNhc2UgRVhDX1NUT1JFX0FDQ0VT UzoKPiAgICAgICAgICAgICAgICAgaWYgKHZjcHUtPmFyY2guZ3Vlc3RfY29udGV4dC5oc3RhdHVz ICYgSFNUQVRVU19TUFYpIHsKPiAgICAgICAgICAgICAgICAgICAgICAgICBrdm1fcmlzY3ZfdmNw dV90cmFwX3JlZGlyZWN0KHZjcHUsIHRyYXApOwo+ICAgICAgICAgICAgICAgICAgICAgICAgIHJl dCA9IDE7Cj4gLS0KPiAyLjI1LjEKPgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0CmxpbnV4LXJpc2N2QGxpc3Rz LmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9saW51eC1yaXNjdgo=