diff options
Diffstat (limited to 'lib/libvmmapi')
| -rw-r--r-- | lib/libvmmapi/vmmapi.c | 34 | ||||
| -rw-r--r-- | lib/libvmmapi/vmmapi.h | 11 |
2 files changed, 19 insertions, 26 deletions
diff --git a/lib/libvmmapi/vmmapi.c b/lib/libvmmapi/vmmapi.c index 0c15845..1e6e627 100644 --- a/lib/libvmmapi/vmmapi.c +++ b/lib/libvmmapi/vmmapi.c @@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$"); #include <machine/specialreg.h> #include <machine/param.h> +#include <errno.h> #include <stdio.h> #include <stdlib.h> #include <assert.h> @@ -958,9 +959,9 @@ vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities) return (error); } -static int -gla2gpa(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, - uint64_t gla, int prot, int *fault, uint64_t *gpa) +int +vm_gla2gpa(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, + uint64_t gla, int prot, uint64_t *gpa, int *fault) { struct vm_gla2gpa gg; int error; @@ -979,29 +980,18 @@ gla2gpa(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, return (error); } -int -vm_gla2gpa(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, - uint64_t gla, int prot, uint64_t *gpa) -{ - int error, fault; - - error = gla2gpa(ctx, vcpu, paging, gla, prot, &fault, gpa); - if (fault) - error = fault; - return (error); -} - #ifndef min #define min(a,b) (((a) < (b)) ? (a) : (b)) #endif int vm_copy_setup(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, - uint64_t gla, size_t len, int prot, struct iovec *iov, int iovcnt) + uint64_t gla, size_t len, int prot, struct iovec *iov, int iovcnt, + int *fault) { void *va; uint64_t gpa; - int error, fault, i, n, off; + int error, i, n, off; for (i = 0; i < iovcnt; i++) { iov[i].iov_base = 0; @@ -1010,18 +1000,16 @@ vm_copy_setup(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging, while (len) { assert(iovcnt > 0); - error = gla2gpa(ctx, vcpu, paging, gla, prot, &fault, &gpa); - if (error) - return (-1); - if (fault) - return (1); + error = vm_gla2gpa(ctx, vcpu, paging, gla, prot, &gpa, fault); + if (error || *fault) + return (error); off = gpa & PAGE_MASK; n = min(len, PAGE_SIZE - off); va = vm_map_gpa(ctx, gpa, n); if (va == NULL) - return (-1); + return (EFAULT); iov->iov_base = va; iov->iov_len = n; diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h index d001cd8..d3ecdc4 100644 --- a/lib/libvmmapi/vmmapi.h +++ b/lib/libvmmapi/vmmapi.h @@ -64,7 +64,7 @@ int vm_setup_memory(struct vmctx *ctx, size_t len, enum vm_mmap_style s); void *vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len); int vm_get_gpa_pmap(struct vmctx *, uint64_t gpa, uint64_t *pte, int *num); int vm_gla2gpa(struct vmctx *, int vcpuid, struct vm_guest_paging *paging, - uint64_t gla, int prot, uint64_t *gpa); + uint64_t gla, int prot, uint64_t *gpa, int *fault); uint32_t vm_get_lowmem_limit(struct vmctx *ctx); void vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit); void vm_set_memflags(struct vmctx *ctx, int flags); @@ -131,10 +131,15 @@ int vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities); /* * Translate the GLA range [gla,gla+len) into GPA segments in 'iov'. * The 'iovcnt' should be big enough to accomodate all GPA segments. - * Returns 0 on success, 1 on a guest fault condition and -1 otherwise. + * + * retval fault Interpretation + * 0 0 Success + * 0 1 An exception was injected into the guest + * EFAULT N/A Error */ int vm_copy_setup(struct vmctx *ctx, int vcpu, struct vm_guest_paging *pg, - uint64_t gla, size_t len, int prot, struct iovec *iov, int iovcnt); + uint64_t gla, size_t len, int prot, struct iovec *iov, int iovcnt, + int *fault); void vm_copyin(struct vmctx *ctx, int vcpu, struct iovec *guest_iov, void *host_dst, size_t len); void vm_copyout(struct vmctx *ctx, int vcpu, const void *host_src, |
