diff options
| author | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2024-11-05 13:28:36 +0000 |
|---|---|---|
| committer | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2024-11-05 13:28:36 +0000 |
| commit | 04d9a5d044fb10db615692bd66749542d96f5af3 (patch) | |
| tree | 219f3f597fdaef302331977aa5b536745694cc2a /sys/dev/ic | |
| parent | 9927ba4f82263ed60af1be339ce510204432c3ad (diff) | |
Implement psp(4) shutdown command and ioctl(2) PSP_IOC_SHUTDOWN.
This will be used by vmd(8) to reset psp(4) on startup.
from hshoexer@; OK mlarkin@
Diffstat (limited to 'sys/dev/ic')
| -rw-r--r-- | sys/dev/ic/psp.c | 34 | ||||
| -rw-r--r-- | sys/dev/ic/pspvar.h | 4 |
2 files changed, 36 insertions, 2 deletions
diff --git a/sys/dev/ic/psp.c b/sys/dev/ic/psp.c index 24ef5efc3e1..0ec90293709 100644 --- a/sys/dev/ic/psp.c +++ b/sys/dev/ic/psp.c @@ -1,4 +1,4 @@ -/* $OpenBSD: psp.c,v 1.9 2024/10/30 18:33:26 bluhm Exp $ */ +/* $OpenBSD: psp.c,v 1.10 2024/11/05 13:28:35 bluhm Exp $ */ /* * Copyright (c) 2023, 2024 Hans-Joerg Hoexer <hshoexer@genua.de> @@ -329,6 +329,35 @@ fail_0: } int +psp_shutdown(struct psp_softc *sc) +{ + int ret; + + if (sc->sc_tmr_map == NULL) + return (EINVAL); + + ret = ccp_docmd(sc, PSP_CMD_SHUTDOWN, 0x0); + + if (ret != 0) + return (EIO); + + /* wbinvd right after SHUTDOWN */ + wbinvd_on_all_cpus(); + + /* release TMR */ + bus_dmamap_unload(sc->sc_dmat, sc->sc_tmr_map); + bus_dmamem_unmap(sc->sc_dmat, sc->sc_tmr_kva, sc->sc_tmr_size); + bus_dmamem_free(sc->sc_dmat, &sc->sc_tmr_seg, 1); + bus_dmamap_destroy(sc->sc_dmat, sc->sc_tmr_map); + sc->sc_tmr_map = NULL; + + /* reset flags */ + sc->sc_flags = 0; + + return (0); +} + +int psp_get_pstatus(struct psp_softc *sc, struct psp_platform_status *ustatus) { struct psp_platform_status *status; @@ -748,6 +777,9 @@ pspioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) case PSP_IOC_INIT: ret = psp_reinit(sc); break; + case PSP_IOC_SHUTDOWN: + ret = psp_shutdown(sc); + break; case PSP_IOC_GET_PSTATUS: ret = psp_get_pstatus(sc, (struct psp_platform_status *)data); break; diff --git a/sys/dev/ic/pspvar.h b/sys/dev/ic/pspvar.h index 9ec1e44f18c..fa36a3a90db 100644 --- a/sys/dev/ic/pspvar.h +++ b/sys/dev/ic/pspvar.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pspvar.h,v 1.5 2024/10/30 17:51:12 bluhm Exp $ */ +/* $OpenBSD: pspvar.h,v 1.6 2024/11/05 13:28:35 bluhm Exp $ */ /* * Copyright (c) 2023, 2024 Hans-Joerg Hoexer <hshoexer@genua.de> @@ -76,6 +76,7 @@ /* Selection of PSP commands of the SEV API Version 0.24 */ #define PSP_CMD_INIT 0x1 +#define PSP_CMD_SHUTDOWN 0x2 #define PSP_CMD_PLATFORMSTATUS 0x4 #define PSP_CMD_DF_FLUSH 0xa #define PSP_CMD_DOWNLOADFIRMWARE 0xb @@ -256,6 +257,7 @@ struct psp_snp_platform_status { #define PSP_IOC_DEACTIVATE _IOW('P', 10, struct psp_deactivate) #define PSP_IOC_SNP_GET_PSTATUS _IOR('P', 11, struct psp_snp_platform_status) #define PSP_IOC_INIT _IO('P', 12) +#define PSP_IOC_SHUTDOWN _IO('P', 13) #define PSP_IOC_GUEST_SHUTDOWN _IOW('P', 255, struct psp_guest_shutdown) #ifdef _KERNEL |