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Thu, 26 Jun 2025 15:28:30 -0700 (PDT) From: anisa.su887@gmail.com To: qemu-devel@nongnu.org Cc: Jonathan.Cameron@huawei.com, nifan.cxl@gmail.com, dave@stgolabs.net, alok.a.tiwari@oracle.com, linux-cxl@vger.kernel.org, Anisa Su Subject: [QEMU PATCH v4 10/10] cxl-mailbox-utils: 0x5605 - FMAPI Initiate DC Release Date: Thu, 26 Jun 2025 22:23:33 +0000 Message-ID: <20250626222743.1766404-11-anisa.su887@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250626222743.1766404-1-anisa.su887@gmail.com> References: <20250626222743.1766404-1-anisa.su887@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::629; envelope-from=anisa.su887@gmail.com; helo=mail-pl1-x629.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1750977037835116600 Content-Type: text/plain; charset="utf-8" From: Anisa Su FM DCD Management command 0x5605 implemented per CXL r3.2 Spec Section 7.6.= 7.6.6 Signed-off-by: Anisa Su --- hw/cxl/cxl-mailbox-utils.c | 79 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 787eeaa7b9..87f9535d46 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -123,6 +123,7 @@ enum { #define SET_DC_REGION_CONFIG 0x2 #define GET_DC_REGION_EXTENT_LIST 0x3 #define INITIATE_DC_ADD 0x4 + #define INITIATE_DC_RELEASE 0x5 }; =20 /* CCI Message Format CXL r3.1 Figure 7-19 */ @@ -3638,6 +3639,77 @@ static CXLRetCode cmd_fm_initiate_dc_add(const struc= t cxl_cmd *cmd, } } =20 +#define CXL_EXTENT_REMOVAL_POLICY_MASK 0x0F +#define CXL_FORCED_REMOVAL_MASK (1 << 4) +/* CXL r3.2 Section 7.6.7.6.6 Initiate Dynamic Capacity Release (Opcode 56= 05h) */ +static CXLRetCode cmd_fm_initiate_dc_release(const struct cxl_cmd *cmd, + uint8_t *payload_in, + size_t len_in, + uint8_t *payload_out, + size_t *len_out, + CXLCCI *cci) +{ + struct { + uint16_t host_id; + uint8_t flags; + uint8_t reg_num; + uint64_t length; + uint8_t tag[0x10]; + uint32_t ext_count; + CXLDCExtentRaw extents[]; + } QEMU_PACKED *in =3D (void *)payload_in; + CXLType3Dev *ct3d =3D CXL_TYPE3(cci->d); + int i, rc; + + switch (in->flags & CXL_EXTENT_REMOVAL_POLICY_MASK) { + case CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE: { + CXLDCExtentList updated_list; + uint32_t updated_list_size; + g_autofree CXLUpdateDCExtentListInPl *list =3D + g_malloc0(sizeof(*list) + + in->ext_count * sizeof(*list->updated_entries)); + + convert_raw_extents(in->extents, list, in->ext_count); + rc =3D cxl_detect_malformed_extent_list(ct3d, list); + if (rc) { + return rc; + } + + /* Fail with Invalid PA if an extent is pending and Forced Rem= oval + * flag not set + */ + if (!(in->flags & CXL_FORCED_REMOVAL_MASK)) { + for (i =3D 0; i < in->ext_count; i++) { + CXLDCExtentRaw ext =3D in->extents[i]; + /* Check requested extents don't overlap with pending = extents. */ + if (cxl_extent_groups_overlaps_dpa_range(&ct3d->dc.ext= ents_pending, + ext.start_dpa= , ext.len)) { + return CXL_MBOX_INVALID_PA; + } + } + } + + rc =3D cxl_dc_extent_release_dry_run(ct3d, + list, + &updated_list, + &updated_list_size); + if (rc) { + return rc; + } + cxl_create_dc_event_records_for_extents(ct3d, + DC_EVENT_RELEASE_CAPAC= ITY, + in->extents, + in->ext_count); + return CXL_MBOX_SUCCESS; + } + default: { + qemu_log_mask(LOG_UNIMP, + "CXL extent removal policy not supported.\n"); + return CXL_MBOX_INVALID_INPUT; + } + } +} + static const struct cxl_cmd cxl_cmd_set[256][256] =3D { [INFOSTAT][BACKGROUND_OPERATION_ABORT] =3D { "BACKGROUND_OPERATION_ABO= RT", cmd_infostat_bg_op_abort, 0, 0 }, @@ -3772,6 +3844,13 @@ static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][= 256] =3D { CXL_MBOX_CONFIG_CHANGE_CXL_RESET | CXL_MBOX_IMMEDIATE_CONFIG_CHANGE | CXL_MBOX_IMMEDIATE_DATA_CHANGE) }, + [FMAPI_DCD_MGMT][INITIATE_DC_RELEASE] =3D { "INIT_DC_RELEASE", + cmd_fm_initiate_dc_release, ~0, + (CXL_MBOX_CONFIG_CHANGE_COLD_RESET | + CXL_MBOX_CONFIG_CHANGE_CONV_RESET | + CXL_MBOX_CONFIG_CHANGE_CXL_RESET | + CXL_MBOX_IMMEDIATE_CONFIG_CHANGE | + CXL_MBOX_IMMEDIATE_DATA_CHANGE) }, }; =20 /* --=20 2.47.2