On 12/05/25 05:40PM, Jonathan Cameron wrote: >On Mon, 12 May 2025 09:37:07 -0400 >"Michael S. Tsirkin" wrote: > >> On Mon, May 12, 2025 at 04:42:41AM -0400, Michael S. Tsirkin wrote: >> > On Wed, Mar 05, 2025 at 09:24:58AM +0000, Jonathan Cameron wrote: >> > > 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_device.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 = 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_mailbox.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 = 0x04, >> > > #define GET_SUPPORTED 0x0 >> > > #define GET_LOG 0x1 >> > > + #define GET_LOG_CAPABILITIES 0x2 >> > > FEATURES = 0x05, >> > > #define GET_SUPPORTED 0x0 >> > > #define GET_FEATURE 0x1 >> > > @@ -1068,6 +1069,43 @@ static CXLRetCode cmd_logs_get_log(const struct cxl_cmd *cmd, >> > > return CXL_MBOX_SUCCESS; >> > > } >> > > >> > > +static const struct CXLLogCapabilities *find_log_index(QemuUUID *uuid, CXLCCI *cci) >> > > +{ >> > > + for (int i = 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 0402h) */ >> > > +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 = (void *)payload_in; >> > > + >> > > + uint32_t *get_log_capabilities_out = (uint32_t *)payload_out; >> > > + >> > > + cap = 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 = 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] = { >> > > [LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, >> > > 0, 0 }, >> > > [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 }, >> > > + [LOGS][GET_LOG_CAPABILITIES] = { "LOGS_GET_LOG_CAPABILITIES", >> > > + cmd_logs_get_log_capabilities, 0x10, 0 }, >> > > [FEATURES][GET_SUPPORTED] = { "FEATURES_GET_SUPPORTED", >> > > cmd_features_get_supported, 0x8, 0 }, >> > > [FEATURES][GET_FEATURE] = { "FEATURES_GET_FEATURE", >> > > @@ -3512,10 +3552,15 @@ static void cxl_rebuild_cel(CXLCCI *cci) >> > > } >> > > } >> > > >> > > +static const struct CXLLogCapabilities cxl_get_log_cap[MAX_LOG_TYPE] = { >> > > + [CXL_LOG_COMMAND_EFFECT] = { .param_flags = 0, .uuid = cel_uuid }, >> > > +}; >> > > + >> > >> > >> > 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] = { .param_flags = 0, .uuid = cel_uuid }, >> > ^~~~~~~~ >> > ../hw/cxl/cxl-mailbox-utils.c:3556:60: note: (near initialization for ‘cxl_get_log_cap[0].uuid’) >> > >> > >> > 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 struct cxl_cmd *cmd, >> > } >> > >> > /* CXL r3.1 Section 8.2.9.5.2.1: Command Effects Log (CEL) */ >> > -static const QemuUUID cel_uuid = { >> > - .data = 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 = { >> > + .data = 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] = { >> > - [CXL_LOG_COMMAND_EFFECT] = { .param_flags = 0, .uuid = cel_uuid }, >> > + [CXL_LOG_COMMAND_EFFECT] = { .param_flags = 0, .uuid = CEL_UUID }, >> > }; >> > >> > void cxl_init_cci(CXLCCI *cci, size_t payload_max) >> > >> >> >> Actually no, does not help either. Dropped for now. >> Next patch does not depend on this one, right? > >Indeed. Unrelated. > >Thanks, > >J 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. 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] = { .param_flags = 0,.uuid = (QemuUUID)cel_uuid }. It will be helpful if you could test the same. 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. Thanks, Arpit >> >> > > void cxl_init_cci(CXLCCI *cci, size_t payload_max) >> > > { >> > > cci->payload_max = payload_max; >> > > cxl_rebuild_cel(cci); >> > > + cci->supported_log_cap = cxl_get_log_cap; >> > > >> > > cci->bg.complete_pct = 0; >> > > cci->bg.starttime = 0; >> > > -- >> > > 2.43.0 >> >> >