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hv: Replace dynamic memory allocation for I/O bitmaps

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-- 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
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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
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@ -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);

11
hypervisor/include/arch/x86/guest/vm.h
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@ -86,6 +86,9 @@ enum vm_state {
};
struct vm_arch {
/* I/O bitmaps A and B for this VM, MUST be 4-Kbyte aligned */
uint8_t io_bitmap[CPU_PAGE_SIZE*2];
uint64_t guest_init_pml4;/* Guest init pml4 */
/* EPT hierarchy for Normal World */
void *nworld_eptp;
@ -96,7 +99,6 @@ struct vm_arch {
void *sworld_eptp;
void *m2p; /* machine address to guest physical address */
void *tmp_pg_array; /* Page array for tmp guest paging struct */
void *iobitmap[2];/* IO bitmap page array base address for this VM */
void *msr_bitmap; /* MSR bitmap page base address for this VM */
struct acrn_vioapic vioapic; /* Virtual IOAPIC base address */
struct acrn_vpic vpic; /* Virtual PIC */
@ -111,7 +113,8 @@ struct vm_arch {
struct vm_io_handler *io_handler;
/* reference to virtual platform to come here (as needed) */
};
} __aligned(CPU_PAGE_SIZE);
#define CPUID_CHECK_SUBLEAF (1U << 0)
#define MAX_VM_VCPUID_ENTRIES 64U
@ -127,11 +130,11 @@ struct vcpuid_entry {
};
struct vm {
struct vm_arch arch_vm; /* Reference to this VM's arch information */
uint16_t vm_id; /* Virtual machine identifier */
struct vm_hw_info hw; /* Reference to this VM's HW information */
struct vm_sw_info sw; /* Reference to SW associated with this VM */
struct vm_pm_info pm; /* Reference to this VM's arch information */
struct vm_arch arch_vm; /* Reference to this VM's arch information */
enum vm_state state; /* VM state */
struct acrn_vuart vuart; /* Virtual UART */
enum vpic_wire_mode wire_mode;
@ -170,7 +173,7 @@ struct vm {
spinlock_t softirq_dev_lock;
struct list_head softirq_dev_entry_list;
};
} __aligned(CPU_PAGE_SIZE);
#ifdef CONFIG_PARTITION_MODE
struct vpci_vdev_array {

3
hypervisor/include/arch/x86/ioreq.h
View File

@ -112,7 +112,8 @@ struct mem_io_node {
int32_t pio_instr_vmexit_handler(struct vcpu *vcpu);
void setup_io_bitmap(struct vm *vm);
void free_io_emulation_resource(struct vm *vm);
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);
void register_io_emulation_handler(struct vm *vm, struct vm_io_range *range,
io_read_fn_t io_read_fn_ptr,
io_write_fn_t io_write_fn_ptr);