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bhyve: Remove unused vm and vcpu arguments from vm_copy routines.

Browse source 
The arguments identifying the VM and vCPU are only needed for
vm_copy_setup.

Reviewed by:	corvink, markj
Differential Revision:	https://reviews.freebsd.org/D37158
This commit is contained in:
John Baldwin 2022-11-18 10:01:44 -08:00
parent 3dc3d32ad6
commit 2b4fe856f4
7 changed files with 37 additions and 44 deletions
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14
lib/libvmmapi/vmmapi.c
View file

@ -1468,14 +1468,17 @@ vm_copy_setup(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging,
}
void
vm_copy_teardown(struct vmctx *ctx __unused, int vcpu __unused,
struct iovec *iov __unused, int iovcnt __unused)
vm_copy_teardown(struct iovec *iov __unused, int iovcnt __unused)
{
/*
* Intentionally empty. This is used by the instruction
* emulation code shared with the kernel. The in-kernel
* version of this is non-empty.
*/
}
void
vm_copyin(struct vmctx *ctx __unused, int vcpu __unused, struct iovec *iov,
void *vp, size_t len)
vm_copyin(struct iovec *iov, void *vp, size_t len)
{
const char *src;
char *dst;
@ -1495,8 +1498,7 @@ vm_copyin(struct vmctx *ctx __unused, int vcpu __unused, struct iovec *iov,
}
void
vm_copyout(struct vmctx *ctx __unused, int vcpu __unused, const void *vp,
struct iovec *iov, size_t len)
vm_copyout(const void *vp, struct iovec *iov, size_t len)
{
const char *src;
char *dst;

11
lib/libvmmapi/vmmapi.h
View file

@ -43,7 +43,7 @@
* API version for out-of-tree consumers like grub-bhyve for making compile
* time decisions.
*/
#define VMMAPI_VERSION 0103 /* 2 digit major followed by 2 digit minor */
#define VMMAPI_VERSION 0104 /* 2 digit major followed by 2 digit minor */
struct iovec;
struct vmctx;
@ -219,12 +219,9 @@ int vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities);
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,
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,
struct iovec *guest_iov, size_t len);
void vm_copy_teardown(struct vmctx *ctx, int vcpu, struct iovec *iov,
int iovcnt);
void vm_copyin(struct iovec *guest_iov, void *host_dst, size_t len);
void vm_copyout(const void *host_src, struct iovec *guest_iov, size_t len);
void vm_copy_teardown(struct iovec *iov, int iovcnt);
/* RTC */
int vm_rtc_write(struct vmctx *ctx, int offset, uint8_t value);

9
sys/amd64/include/vmm.h
View file

@ -461,12 +461,9 @@ struct vm_copyinfo {
int vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo,
int num_copyinfo, int *is_fault);
void vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
int num_copyinfo);
void vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
void *kaddr, size_t len);
void vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
struct vm_copyinfo *copyinfo, size_t len);
void vm_copy_teardown(struct vm_copyinfo *copyinfo, int num_copyinfo);
void vm_copyin(struct vm_copyinfo *copyinfo, void *kaddr, size_t len);
void vm_copyout(const void *kaddr, struct vm_copyinfo *copyinfo, size_t len);
int vcpu_trace_exceptions(struct vm *vm, int vcpuid);
int vcpu_trap_wbinvd(struct vm *vm, int vcpuid);

11
sys/amd64/vmm/vmm.c
View file

@ -2723,8 +2723,7 @@ vm_segment_name(int seg)
}
void
vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
int num_copyinfo)
vm_copy_teardown(struct vm_copyinfo *copyinfo, int num_copyinfo)
{
int idx;
@ -2773,7 +2772,7 @@ vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
}
if (idx != nused) {
vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo);
vm_copy_teardown(copyinfo, num_copyinfo);
return (EFAULT);
} else {
*fault = 0;
@ -2782,8 +2781,7 @@ vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
}
void
vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
size_t len)
vm_copyin(struct vm_copyinfo *copyinfo, void *kaddr, size_t len)
{
char *dst;
int idx;
@ -2799,8 +2797,7 @@ vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
}
void
vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
struct vm_copyinfo *copyinfo, size_t len)
vm_copyout(const void *kaddr, struct vm_copyinfo *copyinfo, size_t len)
{
const char *src;
int idx;

18
sys/amd64/vmm/vmm_instruction_emul.c
View file

@ -835,8 +835,8 @@ emulate_movs(void *vm, int vcpuid, uint64_t gpa, struct vie *vie,
/*
* case (2): read from system memory and write to mmio.
*/
vm_copyin(vm, vcpuid, copyinfo, &val, opsize);
vm_copy_teardown(vm, vcpuid, copyinfo, nitems(copyinfo));
vm_copyin(copyinfo, &val, opsize);
vm_copy_teardown(copyinfo, nitems(copyinfo));
error = memwrite(vm, vcpuid, gpa, val, opsize, arg);
if (error)
goto done;
@ -871,8 +871,8 @@ emulate_movs(void *vm, int vcpuid, uint64_t gpa, struct vie *vie,
if (error)
goto done;
vm_copyout(vm, vcpuid, &val, copyinfo, opsize);
vm_copy_teardown(vm, vcpuid, copyinfo, nitems(copyinfo));
vm_copyout(&val, copyinfo, opsize);
vm_copy_teardown(copyinfo, nitems(copyinfo));
} else {
/*
* Case (4): read from and write to mmio.
@ -1599,13 +1599,13 @@ emulate_stack_op(void *vm, int vcpuid, uint64_t mmio_gpa, struct vie *vie,
if (pushop) {
error = memread(vm, vcpuid, mmio_gpa, &val, size, arg);
if (error == 0)
vm_copyout(vm, vcpuid, &val, copyinfo, size);
vm_copyout(&val, copyinfo, size);
} else {
vm_copyin(vm, vcpuid, copyinfo, &val, size);
vm_copyin(copyinfo, &val, size);
error = memwrite(vm, vcpuid, mmio_gpa, val, size, arg);
rsp += size;
}
vm_copy_teardown(vm, vcpuid, copyinfo, nitems(copyinfo));
vm_copy_teardown(copyinfo, nitems(copyinfo));
if (error == 0) {
error = vie_update_register(vm, vcpuid, VM_REG_GUEST_RSP, rsp,
@ -2300,8 +2300,8 @@ vmm_fetch_instruction(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
if (error || *faultptr)
return (error);
vm_copyin(vm, vcpuid, copyinfo, vie->inst, inst_length);
vm_copy_teardown(vm, vcpuid, copyinfo, nitems(copyinfo));
vm_copyin(copyinfo, vie->inst, inst_length);
vm_copy_teardown(copyinfo, nitems(copyinfo));
vie->num_valid = inst_length;
return (0);
}

4
usr.sbin/bhyve/inout.c
View file

@ -184,14 +184,14 @@ emulate_inout(struct vmctx *ctx, int vcpu, struct vm_exit *vmexit)
val = 0;
if (!in)
vm_copyin(ctx, vcpu, iov, &val, bytes);
vm_copyin(iov, &val, bytes);
retval = handler(ctx, vcpu, in, port, bytes, &val, arg);
if (retval != 0)
break;
if (in)
vm_copyout(ctx, vcpu, &val, iov, bytes);
vm_copyout(&val, iov, bytes);
/* Update index */
if (vis->rflags & PSL_D)

14
usr.sbin/bhyve/task_switch.c
View file

@ -225,9 +225,9 @@ desc_table_rw(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging,
return (error);
if (doread)
vm_copyin(ctx, vcpu, iov, desc, sizeof(*desc));
vm_copyin(iov, desc, sizeof(*desc));
else
vm_copyout(ctx, vcpu, desc, iov, sizeof(*desc));
vm_copyout(desc, iov, sizeof(*desc));
return (0);
}
@ -464,7 +464,7 @@ tss32_save(struct vmctx *ctx, int vcpu, struct vm_task_switch *task_switch,
tss->tss_eip = eip;
/* Copy updated old TSS into guest memory */
vm_copyout(ctx, vcpu, tss, iov, sizeof(struct tss32));
vm_copyout(tss, iov, sizeof(struct tss32));
}
static void
@ -560,7 +560,7 @@ tss32_restore(struct vmctx *ctx, int vcpu, struct vm_task_switch *ts,
* the previous link field.
*/
if (nested)
vm_copyout(ctx, vcpu, tss, iov, sizeof(*tss));
vm_copyout(tss, iov, sizeof(*tss));
/* Validate segment descriptors */
error = validate_seg_desc(ctx, vcpu, ts, VM_REG_GUEST_LDTR, &seg_desc,
@ -685,7 +685,7 @@ push_errcode(struct vmctx *ctx, int vcpu, struct vm_guest_paging *paging,
if (error || *faultptr)
return (error);
vm_copyout(ctx, vcpu, &errcode, iov, bytes);
vm_copyout(&errcode, iov, bytes);
SETREG(ctx, vcpu, VM_REG_GUEST_RSP, esp);
return (0);
}
@ -798,7 +798,7 @@ vmexit_task_switch(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
error = vm_copy_setup(ctx, vcpu, &sup_paging, nt.base, minlimit + 1,
PROT_READ | PROT_WRITE, nt_iov, nitems(nt_iov), &fault);
CHKERR(error, fault);
vm_copyin(ctx, vcpu, nt_iov, &newtss, minlimit + 1);
vm_copyin(nt_iov, &newtss, minlimit + 1);
/* Get the old TSS selector from the guest's task register */
ot_sel = GETREG(ctx, vcpu, VM_REG_GUEST_TR);
@ -830,7 +830,7 @@ vmexit_task_switch(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
error = vm_copy_setup(ctx, vcpu, &sup_paging, ot_base, minlimit + 1,
PROT_READ | PROT_WRITE, ot_iov, nitems(ot_iov), &fault);
CHKERR(error, fault);
vm_copyin(ctx, vcpu, ot_iov, &oldtss, minlimit + 1);
vm_copyin(ot_iov, &oldtss, minlimit + 1);
/*
* Clear the busy bit in the old TSS descriptor if the task switch