From: Jonathan Cameron <Jonathan.Cameron@huawei.com> To: linuxarm@huawei.com, qemu-devel@nongnu.org, "Alex Bennée" <alex.bennee@linaro.org>, "Marcel Apfelbaum" <marcel@redhat.com>, "Michael S . Tsirkin" <mst@redhat.com>, "Igor Mammedov" <imammedo@redhat.com>, "Markus Armbruster" <armbru@redhat.com> Cc: linux-cxl@vger.kernel.org, "Ben Widawsky" <ben.widawsky@intel.com>, "Peter Maydell" <peter.maydell@linaro.org>, "Shameerali Kolothum Thodi" <shameerali.kolothum.thodi@huawei.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, "Saransh Gupta1" <saransh@ibm.com>, "Shreyas Shah" <shreyas.shah@elastics.cloud>, "Chris Browy" <cbrowy@avery-design.com>, "Samarth Saxena" <samarths@cadence.com>, "Dan Williams" <dan.j.williams@intel.com> Subject: [PATCH v7 10/46] hw/cxl/device: Add log commands (8.2.9.4) + CEL Date: Sun, 6 Mar 2022 17:41:01 +0000 [thread overview] Message-ID: <20220306174137.5707-11-Jonathan.Cameron@huawei.com> (raw) In-Reply-To: <20220306174137.5707-1-Jonathan.Cameron@huawei.com> From: Ben Widawsky <ben.widawsky@intel.com> CXL specification provides for the ability to obtain logs from the device. Logs are either spec defined, like the "Command Effects Log" (CEL), or vendor specific. UUIDs are defined for all log types. The CEL is a mechanism to provide information to the host about which commands are supported. It is useful both to determine which spec'd optional commands are supported, as well as provide a list of vendor specified commands that might be used. The CEL is already created as part of mailbox initialization, but here it is now exported to hosts that use these log commands. Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> --- v7: * Use QEMU_PACKED / QEMU_BUILD_BUG_ON (Alex) hw/cxl/cxl-mailbox-utils.c | 69 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 05e6bbdd6f..4e9cb2bccd 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -47,6 +47,9 @@ enum { TIMESTAMP = 0x03, #define GET 0x0 #define SET 0x1 + LOGS = 0x04, + #define GET_SUPPORTED 0x0 + #define GET_LOG 0x1 }; /* 8.2.8.4.5.1 Command Return Codes */ @@ -147,6 +150,70 @@ static ret_code cmd_timestamp_set(struct cxl_cmd *cmd, static QemuUUID cel_uuid; +/* 8.2.9.4.1 */ +static ret_code cmd_logs_get_supported(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + uint16_t entries; + uint8_t rsvd[6]; + struct { + QemuUUID uuid; + uint32_t size; + } log_entries[1]; + } QEMU_PACKED *supported_logs = (void *)cmd->payload; + QEMU_BUILD_BUG_ON(sizeof(*supported_logs) != 0x1c); + + supported_logs->entries = 1; + supported_logs->log_entries[0].uuid = cel_uuid; + supported_logs->log_entries[0].size = 4 * cxl_dstate->cel_size; + + *len = sizeof(*supported_logs); + return CXL_MBOX_SUCCESS; +} + +/* 8.2.9.4.2 */ +static ret_code cmd_logs_get_log(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + QemuUUID uuid; + uint32_t offset; + uint32_t length; + } QEMU_PACKED QEMU_ALIGNED(16) *get_log = (void *)cmd->payload; + + /* + * 8.2.9.4.2 + * The device shall return Invalid Parameter if the Offset or Length + * fields attempt to access beyond the size of the log as reported by Get + * Supported Logs. + * + * XXX: Spec is wrong, "Invalid Parameter" isn't a thing. + * XXX: Spec doesn't address incorrect UUID incorrectness. + * + * The CEL buffer is large enough to fit all commands in the emulation, so + * the only possible failure would be if the mailbox itself isn't big + * enough. + */ + if (get_log->offset + get_log->length > cxl_dstate->payload_size) { + return CXL_MBOX_INVALID_INPUT; + } + + if (!qemu_uuid_is_equal(&get_log->uuid, &cel_uuid)) { + return CXL_MBOX_UNSUPPORTED; + } + + /* Store off everything to local variables so we can wipe out the payload */ + *len = get_log->length; + + memmove(cmd->payload, cxl_dstate->cel_log + get_log->offset, + get_log->length); + + return CXL_MBOX_SUCCESS; +} + #define IMMEDIATE_CONFIG_CHANGE (1 << 1) #define IMMEDIATE_POLICY_CHANGE (1 << 3) #define IMMEDIATE_LOG_CHANGE (1 << 4) @@ -162,6 +229,8 @@ static struct cxl_cmd cxl_cmd_set[256][256] = { cmd_events_set_interrupt_policy, 4, IMMEDIATE_CONFIG_CHANGE }, [TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 }, [TIMESTAMP][SET] = { "TIMESTAMP_SET", cmd_timestamp_set, 8, IMMEDIATE_POLICY_CHANGE }, + [LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0, 0 }, + [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 }, }; void cxl_process_mailbox(CXLDeviceState *cxl_dstate) -- 2.32.0
WARNING: multiple messages have this Message-ID (diff)
From: Jonathan Cameron via <qemu-devel@nongnu.org> To: linuxarm@huawei.com, qemu-devel@nongnu.org, "Alex Bennée" <alex.bennee@linaro.org>, "Marcel Apfelbaum" <marcel@redhat.com>, "Michael S . Tsirkin" <mst@redhat.com>, "Igor Mammedov" <imammedo@redhat.com>, "Markus Armbruster" <armbru@redhat.com> Cc: linux-cxl@vger.kernel.org, "Ben Widawsky" <ben.widawsky@intel.com>, "Peter Maydell" <peter.maydell@linaro.org>, "Shameerali Kolothum Thodi" <shameerali.kolothum.thodi@huawei.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, "Saransh Gupta1" <saransh@ibm.com>, "Shreyas Shah" <shreyas.shah@elastics.cloud>, "Chris Browy" <cbrowy@avery-design.com>, "Samarth Saxena" <samarths@cadence.com>, "Dan Williams" <dan.j.williams@intel.com> Subject: [PATCH v7 10/46] hw/cxl/device: Add log commands (8.2.9.4) + CEL Date: Sun, 6 Mar 2022 17:41:01 +0000 [thread overview] Message-ID: <20220306174137.5707-11-Jonathan.Cameron@huawei.com> (raw) In-Reply-To: <20220306174137.5707-1-Jonathan.Cameron@huawei.com> From: Ben Widawsky <ben.widawsky@intel.com> CXL specification provides for the ability to obtain logs from the device. Logs are either spec defined, like the "Command Effects Log" (CEL), or vendor specific. UUIDs are defined for all log types. The CEL is a mechanism to provide information to the host about which commands are supported. It is useful both to determine which spec'd optional commands are supported, as well as provide a list of vendor specified commands that might be used. The CEL is already created as part of mailbox initialization, but here it is now exported to hosts that use these log commands. Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> --- v7: * Use QEMU_PACKED / QEMU_BUILD_BUG_ON (Alex) hw/cxl/cxl-mailbox-utils.c | 69 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 05e6bbdd6f..4e9cb2bccd 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -47,6 +47,9 @@ enum { TIMESTAMP = 0x03, #define GET 0x0 #define SET 0x1 + LOGS = 0x04, + #define GET_SUPPORTED 0x0 + #define GET_LOG 0x1 }; /* 8.2.8.4.5.1 Command Return Codes */ @@ -147,6 +150,70 @@ static ret_code cmd_timestamp_set(struct cxl_cmd *cmd, static QemuUUID cel_uuid; +/* 8.2.9.4.1 */ +static ret_code cmd_logs_get_supported(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + uint16_t entries; + uint8_t rsvd[6]; + struct { + QemuUUID uuid; + uint32_t size; + } log_entries[1]; + } QEMU_PACKED *supported_logs = (void *)cmd->payload; + QEMU_BUILD_BUG_ON(sizeof(*supported_logs) != 0x1c); + + supported_logs->entries = 1; + supported_logs->log_entries[0].uuid = cel_uuid; + supported_logs->log_entries[0].size = 4 * cxl_dstate->cel_size; + + *len = sizeof(*supported_logs); + return CXL_MBOX_SUCCESS; +} + +/* 8.2.9.4.2 */ +static ret_code cmd_logs_get_log(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + QemuUUID uuid; + uint32_t offset; + uint32_t length; + } QEMU_PACKED QEMU_ALIGNED(16) *get_log = (void *)cmd->payload; + + /* + * 8.2.9.4.2 + * The device shall return Invalid Parameter if the Offset or Length + * fields attempt to access beyond the size of the log as reported by Get + * Supported Logs. + * + * XXX: Spec is wrong, "Invalid Parameter" isn't a thing. + * XXX: Spec doesn't address incorrect UUID incorrectness. + * + * The CEL buffer is large enough to fit all commands in the emulation, so + * the only possible failure would be if the mailbox itself isn't big + * enough. + */ + if (get_log->offset + get_log->length > cxl_dstate->payload_size) { + return CXL_MBOX_INVALID_INPUT; + } + + if (!qemu_uuid_is_equal(&get_log->uuid, &cel_uuid)) { + return CXL_MBOX_UNSUPPORTED; + } + + /* Store off everything to local variables so we can wipe out the payload */ + *len = get_log->length; + + memmove(cmd->payload, cxl_dstate->cel_log + get_log->offset, + get_log->length); + + return CXL_MBOX_SUCCESS; +} + #define IMMEDIATE_CONFIG_CHANGE (1 << 1) #define IMMEDIATE_POLICY_CHANGE (1 << 3) #define IMMEDIATE_LOG_CHANGE (1 << 4) @@ -162,6 +229,8 @@ static struct cxl_cmd cxl_cmd_set[256][256] = { cmd_events_set_interrupt_policy, 4, IMMEDIATE_CONFIG_CHANGE }, [TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 }, [TIMESTAMP][SET] = { "TIMESTAMP_SET", cmd_timestamp_set, 8, IMMEDIATE_POLICY_CHANGE }, + [LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0, 0 }, + [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 }, }; void cxl_process_mailbox(CXLDeviceState *cxl_dstate) -- 2.32.0
next prev parent reply other threads:[~2022-03-06 17:46 UTC|newest] Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-06 17:40 [PATCH v7 00/46] CXl 2.0 emulation Support Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 01/46] hw/pci/cxl: Add a CXL component type (interface) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 02/46] hw/cxl/component: Introduce CXL components (8.1.x, 8.2.5) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 03/46] MAINTAINERS: Add entry for Compute Express Link Emulation Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 04/46] hw/cxl/device: Introduce a CXL device (8.2.8) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 05/46] hw/cxl/device: Implement the CAP array (8.2.8.1-2) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 06/46] hw/cxl/device: Implement basic mailbox (8.2.8.4) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 07/46] hw/cxl/device: Add memory device utilities Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:40 ` [PATCH v7 08/46] hw/cxl/device: Add cheap EVENTS implementation (8.2.9.1) Jonathan Cameron 2022-03-06 17:40 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 09/46] hw/cxl/device: Timestamp implementation (8.2.9.3) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` Jonathan Cameron [this message] 2022-03-06 17:41 ` [PATCH v7 10/46] hw/cxl/device: Add log commands (8.2.9.4) + CEL Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 11/46] hw/pxb: Use a type for realizing expanders Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 12/46] hw/pci/cxl: Create a CXL bus type Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 13/46] cxl: Machine level control on whether CXL support is enabled Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 14/46] hw/pxb: Allow creation of a CXL PXB (host bridge) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 15/46] qtest/cxl: Introduce initial test for pxb-cxl only Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 16/46] hw/cxl/rp: Add a root port Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 17/46] hw/cxl/device: Add a memory device (8.2.8.5) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 18/46] hw/cxl/device: Implement MMIO HDM decoding (8.2.5.12) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 19/46] hw/cxl/device: Add some trivial commands Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 20/46] hw/cxl/device: Plumb real Label Storage Area (LSA) sizing Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 21/46] hw/cxl/device: Implement get/set Label Storage Area (LSA) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 22/46] qtests/cxl: Add initial root port and CXL type3 tests Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 23/46] hw/cxl/component: Implement host bridge MMIO (8.2.5, table 142) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 24/46] acpi/cxl: Add _OSC implementation (9.14.2) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 21:31 ` Michael S. Tsirkin 2022-03-06 21:31 ` Michael S. Tsirkin 2022-03-07 17:01 ` Jonathan Cameron 2022-03-07 17:01 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 25/46] acpi/cxl: Create the CEDT (9.14.1) Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 26/46] hw/cxl/component: Add utils for interleave parameter encoding/decoding Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 27/46] hw/cxl/host: Add support for CXL Fixed Memory Windows Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 28/46] acpi/cxl: Introduce CFMWS structures in CEDT Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 29/46] hw/pci-host/gpex-acpi: Add support for dsdt construction for pxb-cxl Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 30/46] pci/pcie_port: Add pci_find_port_by_pn() Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 31/46] CXL/cxl_component: Add cxl_get_hb_cstate() Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 32/46] mem/cxl_type3: Add read and write functions for associated hostmem Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 33/46] cxl/cxl-host: Add memops for CFMWS region Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 34/46] RFC: softmmu/memory: Add ops to memory_region_ram_init_from_file Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 35/46] hw/cxl/component Add a dumb HDM decoder handler Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 36/46] i386/pc: Enable CXL fixed memory windows Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 37/46] tests/acpi: q35: Allow addition of a CXL test Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 38/46] qtests/bios-tables-test: Add a test for CXL emulation Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 39/46] tests/acpi: Add tables " Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 40/46] qtest/cxl: Add more complex test cases with CFMWs Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 41/46] hw/arm/virt: Basic CXL enablement on pci_expander_bridge instances pxb-cxl Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 42/46] qtest/cxl: Add aarch64 virt test for CXL Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 43/46] docs/cxl: Add initial Compute eXpress Link (CXL) documentation Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 44/46] pci-bridge/cxl_upstream: Add a CXL switch upstream port Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 45/46] pci-bridge/cxl_downstream: Add a CXL switch downstream port Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 17:41 ` [PATCH v7 46/46] cxl/cxl-host: Support interleave decoding with one level of switches Jonathan Cameron 2022-03-06 17:41 ` Jonathan Cameron via 2022-03-06 21:33 ` [PATCH v7 00/46] CXl 2.0 emulation Support Michael S. Tsirkin 2022-03-06 21:33 ` Michael S. Tsirkin 2022-03-07 9:39 ` Jonathan Cameron via 2022-03-07 9:39 ` Jonathan Cameron 2022-03-09 8:15 ` Peter Xu 2022-03-09 8:15 ` Peter Xu 2022-03-09 11:28 ` Jonathan Cameron 2022-03-09 11:28 ` Jonathan Cameron via 2022-03-10 8:02 ` Peter Xu 2022-03-10 8:02 ` Peter Xu 2022-03-16 16:50 ` Jonathan Cameron 2022-03-16 16:50 ` Jonathan Cameron via 2022-03-16 17:16 ` Mark Cave-Ayland 2022-03-16 17:16 ` Mark Cave-Ayland 2022-03-16 17:58 ` Jonathan Cameron 2022-03-16 17:58 ` Jonathan Cameron via 2022-03-16 18:26 ` Jonathan Cameron 2022-03-16 18:26 ` Jonathan Cameron via 2022-03-17 8:12 ` Mark Cave-Ayland 2022-03-17 8:12 ` Mark Cave-Ayland 2022-03-17 16:47 ` Jonathan Cameron 2022-03-17 16:47 ` Jonathan Cameron via 2022-03-18 8:14 ` Mark Cave-Ayland 2022-03-18 8:14 ` Mark Cave-Ayland 2022-03-18 10:08 ` Jonathan Cameron 2022-03-18 10:08 ` Jonathan Cameron via
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