github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-05 02:40:37 +00:00
Code Issues Projects Releases Wiki Activity

hv: Replace dynamic memory allocation for I/O bitmaps

Browse Source 
-- Replace pointer with static memory for io_bitmap
  inside structure vm_arch.
-- Refine allow_guest_pio_access/deny_guest_pio_access

Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Mingqiang Chi
2018-09-07 14:11:08 +08:00
committed by lijinxia
parent eada04b800
commit 02e7edc063
5 changed files with 25 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
hypervisor/arch/x86/guest/pm.c
View File

@@ -94,7 +94,7 @@ static inline void init_cx_port(struct vm *vm)
if (cx_data->cx_reg.space_id == SPACE_SYSTEM_IO) {
uint16_t port = (uint16_t)cx_data->cx_reg.address;
allow_guest_io_access(vm, port, 1U);
allow_guest_pio_access(vm, port, 1U);
}
}
}

47
hypervisor/arch/x86/io.c
View File

@@ -391,44 +391,32 @@ static void empty_io_handler_list(struct vm *vm)
void free_io_emulation_resource(struct vm *vm)
{
empty_io_handler_list(vm);
/* Free I/O emulation bitmaps */
free(vm->arch_vm.iobitmap[0]);
free(vm->arch_vm.iobitmap[1]);
}
void allow_guest_io_access(struct vm *vm, uint32_t address_arg, uint32_t nbytes)
void allow_guest_pio_access(struct vm *vm, uint16_t port_address,
uint32_t nbytes)
{
uint32_t address = address_arg;
uint16_t address = port_address;
uint32_t *b;
uint32_t i;
uint32_t a;
b = vm->arch_vm.iobitmap[0];
b = (uint32_t *)vm->arch_vm.io_bitmap;
for (i = 0U; i < nbytes; i++) {
if ((address & 0x8000U) != 0U) {
b = vm->arch_vm.iobitmap[1];
}
a = address & 0x7fffU;
b[a >> 5U] &= ~(1U << (a & 0x1fU));
b[address >> 5U] &= ~(1U << (address & 0x1fU));
address++;
}
}
static void deny_guest_io_access(struct vm *vm, uint32_t address_arg, uint32_t nbytes)
static void deny_guest_pio_access(struct vm *vm, uint16_t port_address,
uint32_t nbytes)
{
uint32_t address = address_arg;
uint16_t address = port_address;
uint32_t *b;
uint32_t i;
uint32_t a;
b = vm->arch_vm.iobitmap[0];
b = (uint32_t *)vm->arch_vm.io_bitmap;
for (i = 0U; i < nbytes; i++) {
if ((address & 0x8000U) != 0U) {
b = vm->arch_vm.iobitmap[1];
}
a = address & 0x7fffU;
b[a >> 5U] |= (1U << (a & 0x1fU));
b[address >> 5U] |= (1U << (address & 0x1fU));
address++;
}
}
@@ -456,20 +444,11 @@ static struct vm_io_handler *create_io_handler(uint32_t port, uint32_t len,
void setup_io_bitmap(struct vm *vm)
{
/* Allocate VM architecture state and IO bitmaps A and B */
vm->arch_vm.iobitmap[0] = alloc_page();
vm->arch_vm.iobitmap[1] = alloc_page();
ASSERT((vm->arch_vm.iobitmap[0] != NULL) &&
(vm->arch_vm.iobitmap[1] != NULL), "");
if (is_vm0(vm)) {
(void)memset(vm->arch_vm.iobitmap[0], 0x00U, CPU_PAGE_SIZE);
(void)memset(vm->arch_vm.iobitmap[1], 0x00U, CPU_PAGE_SIZE);
(void)memset(vm->arch_vm.io_bitmap, 0x00U, CPU_PAGE_SIZE * 2);
} else {
/* block all IO port access from Guest */
(void)memset(vm->arch_vm.iobitmap[0], 0xFFU, CPU_PAGE_SIZE);
(void)memset(vm->arch_vm.iobitmap[1], 0xFFU, CPU_PAGE_SIZE);
(void)memset(vm->arch_vm.io_bitmap, 0xFFU, CPU_PAGE_SIZE * 2);
}
}
@@ -485,7 +464,7 @@ void register_io_emulation_handler(struct vm *vm, struct vm_io_range *range,
}
if (is_vm0(vm)) {
deny_guest_io_access(vm, range->base, range->len);
deny_guest_pio_access(vm, range->base, range->len);
}
handler = create_io_handler(range->base,

4
hypervisor/arch/x86/vmx.c
View File

@@ -1022,10 +1022,10 @@ static void init_exec_ctrl(struct vcpu *vcpu)
exec_vmwrite32(VMX_CR3_TARGET_COUNT, 0U);
/* Set up IO bitmap register A and B - pg 2902 24.6.4 */
value64 = hva2hpa(vm->arch_vm.iobitmap[0]);
value64 = hva2hpa(vm->arch_vm.io_bitmap);
exec_vmwrite64(VMX_IO_BITMAP_A_FULL, value64);
pr_dbg("VMX_IO_BITMAP_A: 0x%016llx ", value64);
value64 = hva2hpa(vm->arch_vm.iobitmap[1]);
value64 = hva2hpa(&(vm->arch_vm.io_bitmap[CPU_PAGE_SIZE]));
exec_vmwrite64(VMX_IO_BITMAP_B_FULL, value64);
pr_dbg("VMX_IO_BITMAP_B: 0x%016llx ", value64);