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Tsirkin" , , , , , Yuquan Wang , Sweta Kumari , Vinayak Holikatti , Davidlohr Bueso , Ajay Joshi , Subject: Re: [PATCH qemu 7/8] hw/cxl/cxl-mailbox-utils: Added support for Get Log Capabilities (Opcode 0402h) Message-ID: <20250528133106.000003c8@huawei.com> In-Reply-To: <1983025922.01747408682214.JavaMail.epsvc@epcpadp2new> References: <20250305092501.191929-1-Jonathan.Cameron@huawei.com> <20250305092501.191929-8-Jonathan.Cameron@huawei.com> <20250512043011-mutt-send-email-mst@kernel.org> <20250512093638-mutt-send-email-mst@kernel.org> <20250512174038.00000beb@huawei.com> <1983025922.01747408682214.JavaMail.epsvc@epcpadp2new> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.122.19.247] X-ClientProxiedBy: lhrpeml100012.china.huawei.com (7.191.174.184) To frapeml500008.china.huawei.com (7.182.85.71) X-Host-Lookup-Failed: Reverse DNS lookup failed for 185.176.79.56 (deferred) Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron From: Jonathan Cameron via Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Fri, 16 May 2025 19:12:45 +0530 Arpit Kumar wrote: > On 12/05/25 05:40PM, Jonathan Cameron wrote: > >On Mon, 12 May 2025 09:37:07 -0400 > >"Michael S. Tsirkin" wrote: > > =20 > >> On Mon, May 12, 2025 at 04:42:41AM -0400, Michael S. Tsirkin wrote: =20 > >> > On Wed, Mar 05, 2025 at 09:24:58AM +0000, Jonathan Cameron wrote: =20 > >> > > From: Arpit Kumar > >> > > > >> > > CXL spec 3.2 section 8.2.10.5.3 describes Get Log Capabilities. > >> > > It provides log capabilities supported by specified log. > >> > > > >> > > Signed-off-by: Arpit Kumar > >> > > Signed-off-by: Jonathan Cameron > >> > > --- > >> > > include/hw/cxl/cxl_device.h | 20 ++++++++++++++++ > >> > > include/hw/cxl/cxl_mailbox.h | 5 ++++ > >> > > hw/cxl/cxl-mailbox-utils.c | 45 +++++++++++++++++++++++++++++++= +++++ > >> > > 3 files changed, 70 insertions(+) > >> > > > >> > > diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_devi= ce.h > >> > > index ed6cd50c67..87a376c982 100644 > >> > > --- a/include/hw/cxl/cxl_device.h > >> > > +++ b/include/hw/cxl/cxl_device.h > >> > > @@ -133,6 +133,18 @@ typedef enum { > >> > > CXL_MBOX_MAX =3D 0x20 > >> > > } CXLRetCode; > >> > > > >> > > +/* types of logs */ > >> > > +typedef enum { > >> > > + CXL_LOG_COMMAND_EFFECT, > >> > > + CXL_LOG_VENDOR_DEBUG, > >> > > + CXL_LOG_COMPONENT_STATE_DUMP, > >> > > + CXL_LOG_ERROR_CHECK_SCRUB, > >> > > + CXL_LOG_MEDIA_TEST_CAPABILITY, > >> > > + CXL_LOG_MEDIA_TEST_RESULTS_SHORT, > >> > > + CXL_LOG_MEDIA_TEST_RESULTS_LONG, > >> > > + MAX_LOG_TYPE > >> > > +} CXLLogType; > >> > > + > >> > > typedef struct CXLCCI CXLCCI; > >> > > typedef struct cxl_device_state CXLDeviceState; > >> > > struct cxl_cmd; > >> > > @@ -163,6 +175,11 @@ typedef struct CXLEventLog { > >> > > QSIMPLEQ_HEAD(, CXLEvent) events; > >> > > } CXLEventLog; > >> > > > >> > > +typedef struct CXLLogCapabilities { > >> > > + uint32_t param_flags; > >> > > + QemuUUID uuid; > >> > > +} CXLLogCapabilities; > >> > > + > >> > > typedef struct CXLCCI { > >> > > struct cxl_cmd cxl_cmd_set[256][256]; > >> > > struct cel_log { > >> > > @@ -171,6 +188,9 @@ typedef struct CXLCCI { > >> > > } cel_log[1 << 16]; > >> > > size_t cel_size; > >> > > > >> > > + /* get log capabilities */ > >> > > + const CXLLogCapabilities *supported_log_cap; > >> > > + > >> > > /* background command handling (times in ms) */ > >> > > struct { > >> > > uint16_t opcode; > >> > > diff --git a/include/hw/cxl/cxl_mailbox.h b/include/hw/cxl/cxl_mai= lbox.h > >> > > index 9008402d1c..8e1c7c5f15 100644 > >> > > --- a/include/hw/cxl/cxl_mailbox.h > >> > > +++ b/include/hw/cxl/cxl_mailbox.h > >> > > @@ -16,4 +16,9 @@ > >> > > #define CXL_MBOX_BACKGROUND_OPERATION (1 << 6) > >> > > #define CXL_MBOX_BACKGROUND_OPERATION_ABORT (1 << 7) > >> > > > >> > > +#define CXL_LOG_CAP_CLEAR_SUPPORTED (1 << 0) > >> > > +#define CXL_LOG_CAP_POPULATE_SUPPORTED (1 << 1) > >> > > +#define CXL_LOG_CAP_AUTO_POPULATE_SUPPORTED (1 << 2) > >> > > +#define CXL_LOG_CAP_PERSISTENT_COLD_RESET_SUPPORTED (1 << 3) > >> > > + > >> > > #endif > >> > > diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils= .c > >> > > index 299f232f26..f35fc4f112 100644 > >> > > --- a/hw/cxl/cxl-mailbox-utils.c > >> > > +++ b/hw/cxl/cxl-mailbox-utils.c > >> > > @@ -81,6 +81,7 @@ enum { > >> > > LOGS =3D 0x04, > >> > > #define GET_SUPPORTED 0x0 > >> > > #define GET_LOG 0x1 > >> > > + #define GET_LOG_CAPABILITIES 0x2 > >> > > FEATURES =3D 0x05, > >> > > #define GET_SUPPORTED 0x0 > >> > > #define GET_FEATURE 0x1 > >> > > @@ -1068,6 +1069,43 @@ static CXLRetCode cmd_logs_get_log(const st= ruct cxl_cmd *cmd, > >> > > return CXL_MBOX_SUCCESS; > >> > > } > >> > > > >> > > +static const struct CXLLogCapabilities *find_log_index(QemuUUID *= uuid, CXLCCI *cci) > >> > > +{ > >> > > + for (int i =3D CXL_LOG_COMMAND_EFFECT; i < MAX_LOG_TYPE; i++)= { > >> > > + if (qemu_uuid_is_equal(uuid, > >> > > + &cci->supported_log_cap[i].uuid)) { > >> > > + return &cci->supported_log_cap[i]; > >> > > + } > >> > > + } > >> > > + return NULL; > >> > > +} > >> > > + > >> > > +/* CXL r3.2 Section 8.2.10.5.3: Get Log Capabilities (Opcode 0402= h) */ > >> > > +static CXLRetCode cmd_logs_get_log_capabilities(const struct cxl_= cmd *cmd, > >> > > + uint8_t *payload_= in, > >> > > + size_t len_in, > >> > > + uint8_t *payload_= out, > >> > > + size_t *len_out, > >> > > + CXLCCI *cci) > >> > > +{ > >> > > + const CXLLogCapabilities *cap; > >> > > + struct { > >> > > + QemuUUID uuid; > >> > > + } QEMU_PACKED QEMU_ALIGNED(8) *get_log_capabilities_in =3D (v= oid *)payload_in; > >> > > + > >> > > + uint32_t *get_log_capabilities_out =3D (uint32_t *)payload_ou= t; > >> > > + > >> > > + cap =3D find_log_index(&get_log_capabilities_in->uuid, cci); > >> > > + if (!cap) { > >> > > + return CXL_MBOX_INVALID_LOG; > >> > > + } > >> > > + > >> > > + memcpy(get_log_capabilities_out, &cap->param_flags, > >> > > + sizeof(cap->param_flags)); > >> > > + *len_out =3D sizeof(*get_log_capabilities_out); > >> > > + return CXL_MBOX_SUCCESS; > >> > > +} > >> > > + > >> > > /* CXL r3.1 section 8.2.9.6: Features */ > >> > > /* > >> > > * Get Supported Features output payload > >> > > @@ -3253,6 +3291,8 @@ static const struct cxl_cmd cxl_cmd_set[256]= [256] =3D { > >> > > [LOGS][GET_SUPPORTED] =3D { "LOGS_GET_SUPPORTED", cmd_logs_ge= t_supported, > >> > > 0, 0 }, > >> > > [LOGS][GET_LOG] =3D { "LOGS_GET_LOG", cmd_logs_get_log, 0x18,= 0 }, > >> > > + [LOGS][GET_LOG_CAPABILITIES] =3D { "LOGS_GET_LOG_CAPABILITIES= ", > >> > > + cmd_logs_get_log_capabilitie= s, 0x10, 0 }, > >> > > [FEATURES][GET_SUPPORTED] =3D { "FEATURES_GET_SUPPORTED", > >> > > cmd_features_get_supported, 0x8= , 0 }, > >> > > [FEATURES][GET_FEATURE] =3D { "FEATURES_GET_FEATURE", > >> > > @@ -3512,10 +3552,15 @@ static void cxl_rebuild_cel(CXLCCI *cci) > >> > > } > >> > > } > >> > > > >> > > +static const struct CXLLogCapabilities cxl_get_log_cap[MAX_LOG_TY= PE] =3D { > >> > > + [CXL_LOG_COMMAND_EFFECT] =3D { .param_flags =3D 0, .uuid =3D = cel_uuid }, > >> > > +}; > >> > > + =20 > >> > > >> > > >> > causes ci build failures: > >> > > >> > https://gitlab.com/mstredhat/qemu/-/jobs/9999980051 > >> > > >> > ../hw/cxl/cxl-mailbox-utils.c:3556:60: error: initializer element is= not constant > >> > [CXL_LOG_COMMAND_EFFECT] =3D { .param_flags =3D 0, .uuid =3D ce= l_uuid }, > >> > ^~~~~~~~ > >> > ../hw/cxl/cxl-mailbox-utils.c:3556:60: note: (near initialization fo= r =E2=80=98cxl_get_log_cap[0].uuid=E2=80=99) > >> > > >> > > >> > Fixed it up like this: > >> > > >> > diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c > >> > index f35fc4f112..13d26e391b 100644 > >> > --- a/hw/cxl/cxl-mailbox-utils.c > >> > +++ b/hw/cxl/cxl-mailbox-utils.c > >> > @@ -992,9 +992,10 @@ static CXLRetCode cmd_timestamp_set(const struc= t cxl_cmd *cmd, > >> > } > >> > > >> > /* CXL r3.1 Section 8.2.9.5.2.1: Command Effects Log (CEL) */ > >> > -static const QemuUUID cel_uuid =3D { > >> > - .data =3D UUID(0x0da9c0b5, 0xbf41, 0x4b78, 0x8f, 0x79, > >> > +#define CEL_UUID UUID(0x0da9c0b5, 0xbf41, 0x4b78, 0x8f, 0x79, \ > >> > 0x96, 0xb1, 0x62, 0x3b, 0x3f, 0x17) > >> > +static const QemuUUID cel_uuid =3D { > >> > + .data =3D CEL_UUID > >> > }; > >> > > >> > /* CXL r3.1 Section 8.2.9.5.1: Get Supported Logs (Opcode 0400h) */ > >> > @@ -3553,7 +3554,7 @@ static void cxl_rebuild_cel(CXLCCI *cci) > >> > } > >> > > >> > static const struct CXLLogCapabilities cxl_get_log_cap[MAX_LOG_TYPE= ] =3D { > >> > - [CXL_LOG_COMMAND_EFFECT] =3D { .param_flags =3D 0, .uuid =3D ce= l_uuid }, > >> > + [CXL_LOG_COMMAND_EFFECT] =3D { .param_flags =3D 0, .uuid =3D CE= L_UUID }, > >> > }; > >> > > >> > void cxl_init_cci(CXLCCI *cci, size_t payload_max) > >> > =20 > >> > >> > >> Actually no, does not help either. Dropped for now. > >> Next patch does not depend on this one, right? =20 > > > >Indeed. Unrelated. > > > >Thanks, > > > >J =20 >=20 > Thanks for pointing this out. The code builds successfully on my setup > with gcc version: 11.4.0. However, it fails to compile on gcc 7.5.0 > "cc (SUSE Linux) 7.5.0" as used by Michael. This could be a compiler > issue as per the link: > https://stackoverflow.com/questions/54135942/why-initializer- > element-is-not-a-constant-is-not-working-anymore. >=20 > My setup doesn't allow me to regenerate the error using lower version > of compiler. A probable fix to it would be > type casting cel_uuid as: [CXL_LOG_COMMAND_EFFECT] =3D > { .param_flags =3D 0,.uuid =3D (QemuUUID)cel_uuid }. It will be helpful > if you could test the same. I wonder if we are better off just filling it in in cxl_init_cci() So change the type of the element in struct CXLCCI to CXLLogCapabiliites supported_log_cap[MAX_LOGS]; then assign the elements at runtime. That should avoid any issues with whether it is const or not at the cost of a little more code. >=20 > Also, In the existing code, > function: cmd_logs_get_supported(), cel_uuid(const) is assigned to a > non-const variable but I am unsure of why it is not throwing an error. Isn't it just copying the content which should be fine? >=20 > Thanks, > Arpit > >> =20 > >> > > void cxl_init_cci(CXLCCI *cci, size_t payload_max) > >> > > { > >> > > cci->payload_max =3D payload_max; > >> > > cxl_rebuild_cel(cci); > >> > > + cci->supported_log_cap =3D cxl_get_log_cap; > >> > > > >> > > cci->bg.complete_pct =3D 0; > >> > > cci->bg.starttime =3D 0; > >> > > -- > >> > > 2.43.0 =20 > >> > >> =20 > > =20 >=20