diff options
| -rw-r--r-- | arch/s390/include/asm/sclp.h | 2 | ||||
| -rw-r--r-- | drivers/s390/char/Makefile | 2 | ||||
| -rw-r--r-- | drivers/s390/char/sclp.h | 2 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_ap.c | 63 |
4 files changed, 68 insertions, 1 deletions
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index 90f34c7e2752..a7bdd128d85b 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -128,6 +128,8 @@ int sclp_chp_deconfigure(struct chp_id chpid); int sclp_chp_read_info(struct sclp_chp_info *info); int sclp_pci_configure(u32 fid); int sclp_pci_deconfigure(u32 fid); +int sclp_ap_configure(u32 apid); +int sclp_ap_deconfigure(u32 apid); int sclp_pci_report(struct zpci_report_error_header *report, u32 fh, u32 fid); int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count); int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count); diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile index 845e12ac5954..c6fdb81a068a 100644 --- a/drivers/s390/char/Makefile +++ b/drivers/s390/char/Makefile @@ -34,6 +34,8 @@ obj-$(CONFIG_SCLP_VT220_TTY) += sclp_vt220.o obj-$(CONFIG_PCI) += sclp_pci.o +obj-$(subst m,y,$(CONFIG_ZCRYPT)) += sclp_ap.o + obj-$(CONFIG_VMLOGRDR) += vmlogrdr.o obj-$(CONFIG_VMCP) += vmcp.o diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index ccc2d759c575..69d9cde9ff5a 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -229,7 +229,7 @@ static inline void sclp_fill_core_info(struct sclp_core_info *info, #define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL) #define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL) #define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL) - +#define SCLP_HAS_AP_RECONFIG (sclp.facilities & 0x0000000100000000ULL) struct gds_subvector { u8 length; diff --git a/drivers/s390/char/sclp_ap.c b/drivers/s390/char/sclp_ap.c new file mode 100644 index 000000000000..0dd1ca712795 --- /dev/null +++ b/drivers/s390/char/sclp_ap.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * s390 crypto adapter related sclp functions. + * + * Copyright IBM Corp. 2020 + */ +#define KMSG_COMPONENT "sclp_cmd" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/export.h> +#include <linux/slab.h> +#include <asm/sclp.h> +#include "sclp.h" + +#define SCLP_CMDW_CONFIGURE_AP 0x001f0001 +#define SCLP_CMDW_DECONFIGURE_AP 0x001e0001 + +struct ap_cfg_sccb { + struct sccb_header header; +} __packed; + +static int do_ap_configure(sclp_cmdw_t cmd, u32 apid) +{ + struct ap_cfg_sccb *sccb; + int rc; + + if (!SCLP_HAS_AP_RECONFIG) + return -EOPNOTSUPP; + + sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) + return -ENOMEM; + + sccb->header.length = PAGE_SIZE; + cmd |= (apid & 0xFF) << 8; + rc = sclp_sync_request(cmd, sccb); + if (rc) + goto out; + switch (sccb->header.response_code) { + case 0x0020: case 0x0120: case 0x0440: case 0x0450: + break; + default: + pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n", + apid, cmd, sccb->header.response_code); + rc = -EIO; + break; + } +out: + free_page((unsigned long) sccb); + return rc; +} + +int sclp_ap_configure(u32 apid) +{ + return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid); +} +EXPORT_SYMBOL(sclp_ap_configure); + +int sclp_ap_deconfigure(u32 apid) +{ + return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid); +} +EXPORT_SYMBOL(sclp_ap_deconfigure); |