Date: Mon, 1 Aug 2016 11:22:37 GMT From: vincenzo@FreeBSD.org To: svn-soc-all@FreeBSD.org Subject: socsvn commit: r307057 - soc2016/vincenzo/head/sys/amd64/vmm Message-ID: <201608011122.u71BMbg2063939@socsvn.freebsd.org>
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Author: vincenzo Date: Mon Aug 1 11:22:36 2016 New Revision: 307057 URL: http://svnweb.FreeBSD.org/socsvn/?view=rev&rev=307057 Log: vmm: ioregh: use sx lock in place of spin lock Modified: soc2016/vincenzo/head/sys/amd64/vmm/vmm_ioport.c Modified: soc2016/vincenzo/head/sys/amd64/vmm/vmm_ioport.c ============================================================================== --- soc2016/vincenzo/head/sys/amd64/vmm/vmm_ioport.c Mon Aug 1 11:21:15 2016 (r307056) +++ soc2016/vincenzo/head/sys/amd64/vmm/vmm_ioport.c Mon Aug 1 11:22:36 2016 (r307057) @@ -99,17 +99,15 @@ #ifdef VMM_IOPORT_REG_HANDLER #include <sys/kernel.h> +#include <sys/param.h> #include <sys/lock.h> +#include <sys/sx.h> #include <sys/malloc.h> -#include <sys/mutex.h> #include <sys/systm.h> static MALLOC_DEFINE(M_IOREGH, "ioregh", "bhyve ioport reg handlers"); -#define IOREGH_LOCK(ioregh) mtx_lock_spin(&((ioregh)->mtx)) -#define IOREGH_UNLOCK(ioregh) mtx_unlock_spin(&((ioregh)->mtx)) - -#define IOPORT_MAX_REG_HANDLER 12 +#define IOPORT_MAX_REG_HANDLER 16 /* * ioport_reg_handler functions allows us to to catch VM write/read @@ -134,8 +132,8 @@ }; struct ioregh { - struct mtx mtx; - /* TODO: use hash table is better */ + struct sx lock; + /* TODO: use hash table */ struct ioport_reg_handler handlers[IOPORT_MAX_REG_HANDLER]; }; @@ -161,7 +159,7 @@ * - VM_IO_REGH_IOCTL: ioctl on fd */ -/* call with ioregh->mtx held */ +/* call with ioregh->lock held */ static struct ioport_reg_handler * vmm_ioport_find_handler(struct ioregh *ioregh, uint16_t port, uint16_t in, uint32_t mask_data, uint32_t data) @@ -184,7 +182,7 @@ return (NULL); } -/* call with ioregh->mtx held */ +/* call with ioregh->lock held */ static struct ioport_reg_handler * vmm_ioport_empty_handler(struct ioregh *ioregh) { @@ -212,7 +210,7 @@ ioregh = vm_ioregh(vm); - IOREGH_LOCK(ioregh); + sx_xlock(&ioregh->lock); regh = vmm_ioport_find_handler(ioregh, port, in, mask_data, data); if (regh != NULL) { @@ -238,7 +236,7 @@ regh->handler_arg = handler_arg; err: - IOREGH_UNLOCK(ioregh); + sx_xunlock(&ioregh->lock); return (ret); } @@ -252,7 +250,7 @@ ioregh = vm_ioregh(vm); - IOREGH_LOCK(ioregh); + sx_xlock(&ioregh->lock); regh = vmm_ioport_find_handler(ioregh, port, in, mask_data, data); @@ -263,7 +261,7 @@ bzero(regh, sizeof(struct ioport_reg_handler)); err: - IOREGH_UNLOCK(ioregh); + sx_xunlock(&ioregh->lock); return (ret); } @@ -298,7 +296,7 @@ */ static int invoke_reg_handler(struct vm *vm, int vcpuid, struct vm_exit *vmexit, - uint32_t *val, int *error) + uint32_t *val, int *error) { struct ioport_reg_handler *regh; struct ioregh *ioregh; @@ -307,16 +305,14 @@ mask_data = vie_size2mask(vmexit->u.inout.bytes); ioregh = vm_ioregh(vm); - IOREGH_LOCK(ioregh); + sx_slock(&ioregh->lock); regh = vmm_ioport_find_handler(ioregh, vmexit->u.inout.port, vmexit->u.inout.in, mask_data, vmexit->u.inout.eax); - if (regh == NULL) { - IOREGH_UNLOCK(ioregh); - return (0); + if (regh != NULL) { + *error = (*(regh->handler))(vm, regh, val); } - *error = (*(regh->handler))(vm, regh, val); - IOREGH_UNLOCK(ioregh); - return (1); + sx_sunlock(&ioregh->lock); + return (regh != NULL); } struct ioregh * @@ -325,8 +321,7 @@ struct ioregh *ioregh; ioregh = malloc(sizeof(struct ioregh), M_IOREGH, M_WAITOK | M_ZERO); - - mtx_init(&ioregh->mtx, "ioregh lock", NULL, MTX_SPIN); + sx_init(&ioregh->lock, "ioregh lock"); return (ioregh); } @@ -334,6 +329,7 @@ void ioregh_cleanup(struct ioregh *ioregh) { + sx_destroy(&ioregh->lock); free(ioregh, M_IOREGH); } #else /* !VMM_IOPORT_REG_HANDLER */
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