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Tue, 25 Jul 2023 18:39:57 +0000 (GMT) X-AuditID: cbfec36f-fb1ff7000000a673-43-64c016fd47e9 Received: from SSI-EX3.ssi.samsung.com ( [105.128.2.146]) by ussmgxs3new.samsung.com (USCPEXMTA) with SMTP id C8.DA.64580.CF610C46; Tue, 25 Jul 2023 14:39:56 -0400 (EDT) Received: from SSI-EX2.ssi.samsung.com (105.128.2.227) by SSI-EX3.ssi.samsung.com (105.128.2.228) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.2375.24; Tue, 25 Jul 2023 11:39:56 -0700 Received: from SSI-EX2.ssi.samsung.com ([105.128.2.227]) by SSI-EX2.ssi.samsung.com ([105.128.2.227]) with mapi id 15.01.2375.024; Tue, 25 Jul 2023 11:39:56 -0700 From: Fan Ni To: "qemu-devel@nongnu.org" CC: "jonathan.cameron@huawei.com" , "linux-cxl@vger.kernel.org" , "gregory.price@memverge.com" , "hchkuo@avery-design.com.tw" , "cbrowy@avery-design.com" , "ira.weiny@intel.com" , "dan.j.williams@intel.com" , Adam Manzanares , "dave@stgolabs.net" , "nmtadam.samsung@gmail.com" , "nifan@outlook.com" , Fan Ni Subject: [Qemu PATCH v2 5/9] hw/mem/cxl_type3: Add host backend and address space handling for DC regions Thread-Topic: [Qemu PATCH v2 5/9] hw/mem/cxl_type3: Add host backend and address space handling for DC regions Thread-Index: AQHZvydo9CDYVoLKukCzVG4QTwqoCg== Date: Tue, 25 Jul 2023 18:39:56 +0000 Message-ID: <20230725183939.2741025-6-fan.ni@samsung.com> In-Reply-To: <20230725183939.2741025-1-fan.ni@samsung.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.25.1 x-originating-ip: [105.128.2.176] MIME-Version: 1.0 X-CFilter-Loop: Reflected X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrFKsWRmVeSWpSXmKPExsWy7djXc7p/xQ6kGDzaJ2HRfX4Do8X0qRcY LVbfXMNo0dD0iMWiZfd7Jov9T5+zWKxaeI3N4vysUywWzyc+Z7JYuuQRs8Xx3h0sDtweFyZP YPVY3ODqsXPWXXaPliNvgbw9L5k8Nn78z+7x5NpmJo/Nr18we0ydXe/xeZNcAFcUl01Kak5m WWqRvl0CV8bGtZ2MBQ0TGCuezr/D2sC4Ka2LkZNDQsBE4sz550xdjFwcQgIrGSXOtZ1nh3Ba mSSWLXnODFO15F4nVNVaRondPR1sIAkhgU+MEm/ueEIklgHZ7b/AOtgEFCX2dW0HKxIRMJY4 dngJM0gRs8BbFomPa96wdDFycAgLZEvcvMoLUVMg0fTiHFS9nkRHF8QCFgFViRtHjjCClPMK WEpMPmQJEuYUsJJ49mU2K4jNKCAm8f3UGiYQm1lAXOLWk/lMEEcLSiyavQfqATGJf7seskHY 8hKTf8yAshUl7n9/yQ7RqydxY+oUNghbW2LZwtdgvbxAc07OfMICUS8pcXDFDRaQVyQEJnNK LF7cDpVwkTi8ZysrhC0tMX3NZbAXJQSSJVZ95III50jMX7IFqtxaYuGf9UwTGFVmITl7FpIz ZiE5YxaSMxYwsqxiFC8tLs5NTy02ykst1ytOzC0uzUvXS87P3cQITG6n/x3O38F4/dZHvUOM TByMhxglOJiVRHgNY/alCPGmJFZWpRblxxeV5qQWH2KU5mBREuc1tD2ZLCSQnliSmp2aWpBa BJNl4uCUamCKX5DE6lQ6w+V+2sKqrY0Xmso3N870LP0Wv0T/7F21d/8/+puZCpyRkLrKtspv 8YnQJx1aEw/efrvr3X7JK3Hv/NcKftdWj+metnnJm/Zw+3cWnadXWFyukOD7+u3l8bbAoLPV 82L2+93Qr7E1aTdewdYQfPF5O9PZc7VndpkaLXDJ3rEzUlu1vUbZ8yCTotKJlRfZX3jLpTVV iYqrrfj4UsG45PT88CzWWM1wIzuDP7brfN1XyyX58sbNy1vHXN4iUHnSpaz15aw/p7L+vf48 p2kGT/PNKYv+urf8m7B1+ZrFt+Z2heTPuMhVqOVTXXzogOOEl9Mvyih2WQcuPTGRzVZq7bNH /9uXSeZ3Z3xUYinOSDTUYi4qTgQA+m51Xd0DAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrOIsWRmVeSWpSXmKPExsWS2cA0SfeP2IEUg08bTC26z29gtJg+9QKj xeqbaxgtGpoesVi07H7PZLH/6XMWi1ULr7FZnJ91isXi+cTnTBZLlzxitjjeu4PFgdvjwuQJ rB6LG1w9ds66y+7RcuQtkLfnJZPHxo//2T2eXNvM5LH59Qtmj6mz6z0+b5IL4IrisklJzcks Sy3St0vgyti4tpOxoGECY8XT+XdYGxg3pXUxcnJICJhILLnXydTFyMUhJLCaUeLGhH2sEM4n Rolzp15BOcsYJeYvXs0I0sImoCixr2s7G4gtImAscezwEmYQm1ngNYvEt4vcXYwcHMIC2RI3 r/JClBRI/Nv3jwnC1pPo6OoAa2URUJW4ceQII0g5r4ClxORDliCmEJC5dWIcSAWngJXEsy+z WUFsRgExie+n1jBBLBKXuPVkPhPE/QISS/acZ4awRSVePv7HCmHLS0z+MYMNwlaUuP/9JTtE r57EjalT2CBsbYllC1+D9fIKCEqcnPmEBaJeUuLgihssExglZiFZNwtJ+ywk7bOQtC9gZFnF KF5aXJybXlFsnJdarlecmFtcmpeul5yfu4kRmBZO/zscs4Px3q2PeocYmTgYDzFKcDArifAa xuxLEeJNSaysSi3Kjy8qzUktPsQozcGiJM7rETsxXkggPbEkNTs1tSC1CCbLxMEp1cBUKvL0 3uH1OQecOuSmFGvP/Xjt9rW7m25vODHt9rK1de9r/TmF2oxLrd/LX31UoaPnlVcZ+u28qsQ9 0xmTeJiM+c7+7BXN3n71QPki8bbU6ogS4TciNTJct64mie6PttafFr0m93fvh943SalX7h9f feKsBkeR3yPbOcuWrRaqz+VRyckL+ifmmMl7nktmfdMlcdOMI5HKR8JdjinarHvJsfLo9sZ6 3gDT3Z/uhBRum/brdPUaFVs1ns1RhzKNPYRm8i8uPi/zr2rmNqW1z6ZsFp/yO/vkjG2fjzPN PjT1gTPzNQ7bpRlfrOsWNZ/OOdCUH/P794mWxYuqH5gZ/Y3oOWFYr2lnrcEjay/4w/qpEktx RqKhFnNRcSIAFCKCiXoDAAA= X-CMS-MailID: 20230725183957uscas1p1eeb8e8eccc6c00b460d183027642374b CMS-TYPE: 301P X-CMS-RootMailID: 20230725183957uscas1p1eeb8e8eccc6c00b460d183027642374b References: <20230725183939.2741025-1-fan.ni@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Fan Ni Add (file/memory backed) host backend, all the dynamic capacity regions will share a single, large enough host backend. Set up address space for DC regions to support read/write operations to dynamic capacity for DCD. With the change, following supports are added: 1. add a new property to type3 device "nonvolatile-dc-memdev" to point to host memory backend for dynamic capacity; 2. add namespace for dynamic capacity for read/write support; 3. create cdat entries for each dynamic capacity region; 4. fix dvsec range registers to include DC regions. Signed-off-by: Fan Ni --- hw/cxl/cxl-mailbox-utils.c | 19 +++- hw/mem/cxl_type3.c | 203 +++++++++++++++++++++++++++++------- include/hw/cxl/cxl_device.h | 4 + 3 files changed, 185 insertions(+), 41 deletions(-) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index dd5ea95af8..0511b8e6f7 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -388,9 +388,11 @@ static CXLRetCode cmd_firmware_update_get_info(struct cxl_cmd *cmd, char fw_rev4[0x10]; } QEMU_PACKED *fw_info; QEMU_BUILD_BUG_ON(sizeof(*fw_info) != 0x50); + CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); if ((cxl_dstate->vmem_size < CXL_CAPACITY_MULTIPLIER) || - (cxl_dstate->pmem_size < CXL_CAPACITY_MULTIPLIER)) { + (cxl_dstate->pmem_size < CXL_CAPACITY_MULTIPLIER) || + (ct3d->dc.total_capacity < CXL_CAPACITY_MULTIPLIER)) { return CXL_MBOX_INTERNAL_ERROR; } @@ -531,7 +533,8 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d); if ((!QEMU_IS_ALIGNED(cxl_dstate->vmem_size, CXL_CAPACITY_MULTIPLIER)) || - (!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER))) { + (!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER)) || + (!QEMU_IS_ALIGNED(ct3d->dc.total_capacity, CXL_CAPACITY_MULTIPLIER))) { return CXL_MBOX_INTERNAL_ERROR; } @@ -566,9 +569,11 @@ static CXLRetCode cmd_ccls_get_partition_info(struct cxl_cmd *cmd, uint64_t next_pmem; } QEMU_PACKED *part_info = (void *)cmd->payload; QEMU_BUILD_BUG_ON(sizeof(*part_info) != 0x20); + CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); if ((!QEMU_IS_ALIGNED(cxl_dstate->vmem_size, CXL_CAPACITY_MULTIPLIER)) || - (!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER))) { + (!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER)) || + (!QEMU_IS_ALIGNED(ct3d->dc.total_capacity, CXL_CAPACITY_MULTIPLIER))) { return CXL_MBOX_INTERNAL_ERROR; } @@ -880,7 +885,13 @@ static CXLRetCode cmd_media_clear_poison(struct cxl_cmd *cmd, struct clear_poison_pl *in = (void *)cmd->payload; dpa = ldq_le_p(&in->dpa); - if (dpa + CXL_CACHE_LINE_SIZE > cxl_dstate->static_mem_size) { + if (dpa + CXL_CACHE_LINE_SIZE >= cxl_dstate->static_mem_size + && ct3d->dc.num_regions == 0) { + return CXL_MBOX_INVALID_PA; + } + + if (ct3d->dc.num_regions && dpa + CXL_CACHE_LINE_SIZE >= + cxl_dstate->static_mem_size + ct3d->dc.total_capacity) { return CXL_MBOX_INVALID_PA; } diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c index b29bb2309a..76bbd9f785 100644 --- a/hw/mem/cxl_type3.c +++ b/hw/mem/cxl_type3.c @@ -20,6 +20,7 @@ #include "hw/pci/spdm.h" #define DWORD_BYTE 4 +#define CXL_CAPACITY_MULTIPLIER (256 * MiB) /* Default CDAT entries for a memory region */ enum { @@ -33,8 +34,8 @@ enum { }; static int ct3_build_cdat_entries_for_mr(CDATSubHeader **cdat_table, - int dsmad_handle, MemoryRegion *mr, - bool is_pmem, uint64_t dpa_base) + int dsmad_handle, uint8_t flags, + uint64_t dpa_base, uint64_t size) { g_autofree CDATDsmas *dsmas = NULL; g_autofree CDATDslbis *dslbis0 = NULL; @@ -53,9 +54,9 @@ static int ct3_build_cdat_entries_for_mr(CDATSubHeader **cdat_table, .length = sizeof(*dsmas), }, .DSMADhandle = dsmad_handle, - .flags = is_pmem ? CDAT_DSMAS_FLAG_NV : 0, + .flags = flags, .DPA_base = dpa_base, - .DPA_length = memory_region_size(mr), + .DPA_length = size, }; /* For now, no memory side cache, plausiblish numbers */ @@ -137,9 +138,9 @@ static int ct3_build_cdat_entries_for_mr(CDATSubHeader **cdat_table, * NV: Reserved - the non volatile from DSMAS matters * V: EFI_MEMORY_SP */ - .EFI_memory_type_attr = is_pmem ? 2 : 1, + .EFI_memory_type_attr = flags ? 2 : 1, .DPA_offset = 0, - .DPA_length = memory_region_size(mr), + .DPA_length = size, }; /* Header always at start of structure */ @@ -158,21 +159,28 @@ static int ct3_build_cdat_table(CDATSubHeader ***cdat_table, void *priv) g_autofree CDATSubHeader **table = NULL; CXLType3Dev *ct3d = priv; MemoryRegion *volatile_mr = NULL, *nonvolatile_mr = NULL; + MemoryRegion *dc_mr = NULL; int dsmad_handle = 0; int cur_ent = 0; int len = 0; int rc, i; + uint64_t vmr_size = 0, pmr_size = 0; - if (!ct3d->hostpmem && !ct3d->hostvmem) { + if (!ct3d->hostpmem && !ct3d->hostvmem && !ct3d->dc.num_regions) { return 0; } + if (ct3d->hostpmem && ct3d->hostvmem && ct3d->dc.host_dc) { + warn_report("The device has static ram and pmem and dynamic capacity"); + } + if (ct3d->hostvmem) { volatile_mr = host_memory_backend_get_memory(ct3d->hostvmem); if (!volatile_mr) { return -EINVAL; } len += CT3_CDAT_NUM_ENTRIES; + vmr_size = volatile_mr->size; } if (ct3d->hostpmem) { @@ -181,6 +189,19 @@ static int ct3_build_cdat_table(CDATSubHeader ***cdat_table, void *priv) return -EINVAL; } len += CT3_CDAT_NUM_ENTRIES; + pmr_size = nonvolatile_mr->size; + } + + if (ct3d->dc.num_regions) { + if (ct3d->dc.host_dc) { + dc_mr = host_memory_backend_get_memory(ct3d->dc.host_dc); + if (!dc_mr) { + return -EINVAL; + } + len += CT3_CDAT_NUM_ENTRIES * ct3d->dc.num_regions; + } else { + return -EINVAL; + } } table = g_malloc0(len * sizeof(*table)); @@ -190,8 +211,8 @@ static int ct3_build_cdat_table(CDATSubHeader ***cdat_table, void *priv) /* Now fill them in */ if (volatile_mr) { - rc = ct3_build_cdat_entries_for_mr(table, dsmad_handle++, volatile_mr, - false, 0); + rc = ct3_build_cdat_entries_for_mr(table, dsmad_handle++, + 0, 0, vmr_size); if (rc < 0) { return rc; } @@ -200,14 +221,37 @@ static int ct3_build_cdat_table(CDATSubHeader ***cdat_table, void *priv) if (nonvolatile_mr) { rc = ct3_build_cdat_entries_for_mr(&(table[cur_ent]), dsmad_handle++, - nonvolatile_mr, true, - (volatile_mr ? - memory_region_size(volatile_mr) : 0)); + CDAT_DSMAS_FLAG_NV, vmr_size, pmr_size); if (rc < 0) { goto error_cleanup; } cur_ent += CT3_CDAT_NUM_ENTRIES; } + + if (dc_mr) { + uint64_t region_base = vmr_size + pmr_size; + + /* + * Currently we create cdat entries for each region, should we only + * create dsmas table instead?? + * We assume all dc regions are non-volatile for now. + * + */ + for (i = 0; i < ct3d->dc.num_regions; i++) { + rc = ct3_build_cdat_entries_for_mr(&(table[cur_ent]) + , dsmad_handle++ + , CDAT_DSMAS_FLAG_NV | CDAT_DSMAS_FLAG_DYNAMIC_CAP + , region_base, ct3d->dc.regions[i].len); + if (rc < 0) { + goto error_cleanup; + } + ct3d->dc.regions[i].dsmadhandle = dsmad_handle - 1; + + cur_ent += CT3_CDAT_NUM_ENTRIES; + region_base += ct3d->dc.regions[i].len; + } + } + assert(len == cur_ent); *cdat_table = g_steal_pointer(&table); @@ -435,11 +479,24 @@ static void build_dvsecs(CXLType3Dev *ct3d) range2_size_hi = ct3d->hostpmem->size >> 32; range2_size_lo = (2 << 5) | (2 << 2) | 0x3 | (ct3d->hostpmem->size & 0xF0000000); + } else if (ct3d->dc.host_dc) { + range2_size_hi = ct3d->dc.host_dc->size >> 32; + range2_size_lo = (2 << 5) | (2 << 2) | 0x3 | + (ct3d->dc.host_dc->size & 0xF0000000); } - } else { + } else if (ct3d->hostpmem) { range1_size_hi = ct3d->hostpmem->size >> 32; range1_size_lo = (2 << 5) | (2 << 2) | 0x3 | (ct3d->hostpmem->size & 0xF0000000); + if (ct3d->dc.host_dc) { + range2_size_hi = ct3d->dc.host_dc->size >> 32; + range2_size_lo = (2 << 5) | (2 << 2) | 0x3 | + (ct3d->dc.host_dc->size & 0xF0000000); + } + } else { + range1_size_hi = ct3d->dc.host_dc->size >> 32; + range1_size_lo = (2 << 5) | (2 << 2) | 0x3 | + (ct3d->dc.host_dc->size & 0xF0000000); } dvsec = (uint8_t *)&(CXLDVSECDevice){ @@ -708,7 +765,8 @@ static void ct3d_reg_write(void *opaque, hwaddr offset, uint64_t value, } /* - * Create a dc region to test "Get Dynamic Capacity Configuration" command. + * Create dc regions. + * TODO: region parameters are hard coded, may need to change in the future. */ static int cxl_create_dc_regions(CXLType3Dev *ct3d) { @@ -739,7 +797,8 @@ static bool cxl_setup_memory(CXLType3Dev *ct3d, Error **errp) { DeviceState *ds = DEVICE(ct3d); - if (!ct3d->hostmem && !ct3d->hostvmem && !ct3d->hostpmem) { + if (!ct3d->hostmem && !ct3d->hostvmem && !ct3d->hostpmem + && !ct3d->dc.num_regions) { error_setg(errp, "at least one memdev property must be set"); return false; } else if (ct3d->hostmem && ct3d->hostpmem) { @@ -807,6 +866,50 @@ static bool cxl_setup_memory(CXLType3Dev *ct3d, Error **errp) return false; } + ct3d->dc.total_capacity = 0; + if (ct3d->dc.host_dc) { + MemoryRegion *dc_mr; + char *dc_name; + uint64_t total_region_size = 0; + int i; + + dc_mr = host_memory_backend_get_memory(ct3d->dc.host_dc); + if (!dc_mr) { + error_setg(errp, "dynamic capacity must have backing device"); + return false; + } + /* FIXME: set dc as nonvolatile for now */ + memory_region_set_nonvolatile(dc_mr, true); + memory_region_set_enabled(dc_mr, true); + host_memory_backend_set_mapped(ct3d->dc.host_dc, true); + if (ds->id) { + dc_name = g_strdup_printf("cxl-dcd-dpa-dc-space:%s", ds->id); + } else { + dc_name = g_strdup("cxl-dcd-dpa-dc-space"); + } + address_space_init(&ct3d->dc.host_dc_as, dc_mr, dc_name); + + for (i = 0; i < ct3d->dc.num_regions; i++) { + total_region_size += ct3d->dc.regions[i].len; + } + /* Make sure the host backend is large enough to cover all dc range */ + if (total_region_size > memory_region_size(dc_mr)) { + error_setg(errp, + "too small host backend size, increase to %lu MiB or more", + total_region_size / 1024 / 1024); + return false; + } + + if (dc_mr->size % CXL_CAPACITY_MULTIPLIER != 0) { + error_setg(errp, "DC region size is unaligned to %lx", + CXL_CAPACITY_MULTIPLIER); + return false; + } + + ct3d->dc.total_capacity = total_region_size; + g_free(dc_name); + } + return true; } @@ -916,6 +1019,9 @@ err_release_cdat: err_free_special_ops: g_free(regs->special_ops); err_address_space_free: + if (ct3d->dc.host_dc) { + address_space_destroy(&ct3d->dc.host_dc_as); + } if (ct3d->hostpmem) { address_space_destroy(&ct3d->hostpmem_as); } @@ -935,6 +1041,9 @@ static void ct3_exit(PCIDevice *pci_dev) cxl_doe_cdat_release(cxl_cstate); spdm_sock_fini(ct3d->doe_spdm.socket); g_free(regs->special_ops); + if (ct3d->dc.host_dc) { + address_space_destroy(&ct3d->dc.host_dc_as); + } if (ct3d->hostpmem) { address_space_destroy(&ct3d->hostpmem_as); } @@ -999,16 +1108,24 @@ static int cxl_type3_hpa_to_as_and_dpa(CXLType3Dev *ct3d, AddressSpace **as, uint64_t *dpa_offset) { - MemoryRegion *vmr = NULL, *pmr = NULL; + MemoryRegion *vmr = NULL, *pmr = NULL, *dc_mr = NULL; + uint64_t vmr_size = 0, pmr_size = 0, dc_size = 0; if (ct3d->hostvmem) { vmr = host_memory_backend_get_memory(ct3d->hostvmem); + vmr_size = memory_region_size(vmr); } if (ct3d->hostpmem) { pmr = host_memory_backend_get_memory(ct3d->hostpmem); + pmr_size = memory_region_size(pmr); + } + if (ct3d->dc.host_dc) { + dc_mr = host_memory_backend_get_memory(ct3d->dc.host_dc); + /* Do we want dc_size to be dc_mr->size or not?? */ + dc_size = ct3d->dc.total_capacity; } - if (!vmr && !pmr) { + if (!vmr && !pmr && !dc_mr) { return -ENODEV; } @@ -1016,19 +1133,19 @@ static int cxl_type3_hpa_to_as_and_dpa(CXLType3Dev *ct3d, return -EINVAL; } - if (*dpa_offset > ct3d->cxl_dstate.static_mem_size) { + if ((*dpa_offset >= vmr_size + pmr_size + dc_size) || + (*dpa_offset >= vmr_size + pmr_size && ct3d->dc.num_regions == 0)) { return -EINVAL; } - if (vmr) { - if (*dpa_offset < memory_region_size(vmr)) { - *as = &ct3d->hostvmem_as; - } else { - *as = &ct3d->hostpmem_as; - *dpa_offset -= memory_region_size(vmr); - } - } else { + if (*dpa_offset < vmr_size) { + *as = &ct3d->hostvmem_as; + } else if (*dpa_offset < vmr_size + pmr_size) { *as = &ct3d->hostpmem_as; + *dpa_offset -= vmr_size; + } else { + *as = &ct3d->dc.host_dc_as; + *dpa_offset -= (vmr_size + pmr_size); } return 0; @@ -1101,6 +1218,8 @@ static Property ct3_props[] = { DEFINE_PROP_STRING("cdat", CXLType3Dev, cxl_cstate.cdat.filename), DEFINE_PROP_UINT16("spdm", CXLType3Dev, spdm_port, 0), DEFINE_PROP_UINT8("num-dc-regions", CXLType3Dev, dc.num_regions, 0), + DEFINE_PROP_LINK("nonvolatile-dc-memdev", CXLType3Dev, dc.host_dc, + TYPE_MEMORY_BACKEND, HostMemoryBackend *), DEFINE_PROP_END_OF_LIST(), }; @@ -1167,33 +1286,43 @@ static void set_lsa(CXLType3Dev *ct3d, const void *buf, uint64_t size, static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) { - MemoryRegion *vmr = NULL, *pmr = NULL; + MemoryRegion *vmr = NULL, *pmr = NULL, *dc_mr = NULL; AddressSpace *as; + uint64_t vmr_size = 0, pmr_size = 0, dc_size = 0; if (ct3d->hostvmem) { vmr = host_memory_backend_get_memory(ct3d->hostvmem); + vmr_size = memory_region_size(vmr); } if (ct3d->hostpmem) { pmr = host_memory_backend_get_memory(ct3d->hostpmem); + pmr_size = memory_region_size(pmr); } + if (ct3d->dc.host_dc) { + dc_mr = host_memory_backend_get_memory(ct3d->dc.host_dc); + dc_size = ct3d->dc.total_capacity; + } - if (!vmr && !pmr) { + if (!vmr && !pmr && !dc_mr) { return false; } - if (dpa_offset + CXL_CACHE_LINE_SIZE > ct3d->cxl_dstate.static_mem_size) { + if (dpa_offset >= vmr_size + pmr_size + dc_size) { + return false; + } + if (dpa_offset + CXL_CACHE_LINE_SIZE >= vmr_size + pmr_size + && ct3d->dc.num_regions == 0) { return false; } - if (vmr) { - if (dpa_offset < memory_region_size(vmr)) { - as = &ct3d->hostvmem_as; - } else { - as = &ct3d->hostpmem_as; - dpa_offset -= memory_region_size(vmr); - } - } else { + if (dpa_offset < vmr_size) { + as = &ct3d->hostvmem_as; + } else if (dpa_offset < vmr_size + pmr_size) { as = &ct3d->hostpmem_as; + dpa_offset -= vmr->size; + } else { + as = &ct3d->dc.host_dc_as; + dpa_offset -= (vmr_size + pmr_size); } address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h index 503c344326..1c99b05a66 100644 --- a/include/hw/cxl/cxl_device.h +++ b/include/hw/cxl/cxl_device.h @@ -427,6 +427,10 @@ struct CXLType3Dev { uint64_t poison_list_overflow_ts; struct dynamic_capacity { + HostMemoryBackend *host_dc; + AddressSpace host_dc_as; + uint64_t total_capacity; /* 256M aligned */ + uint8_t num_regions; /* 0-8 regions */ struct CXLDCD_Region regions[DCD_MAX_REGION_NUM]; } dc;