# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1181034489 -3600
# Node ID 4f05a587cb6b146e1a24a5a672566ac35de40b71
# Parent 91301122db5128d8d94e90638c5a272479621f68
hvm vmx: Clean up vmx_io_instruction().
vmx_io_instruction() is too long, so it's hard to understand or change
something. The attached patch splits it into several readable functions,
making it easer to understand and extend.
Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>
---
xen/arch/x86/hvm/vmx/vmx.c | 595 +++++++++++++++++++++-----------------
xen/include/asm-x86/hvm/vmx/vmx.h | 13
2 files changed, 347 insertions(+), 261 deletions(-)
diff -r 91301122db51 -r 4f05a587cb6b xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c Tue Jun 05 10:00:15 2007 +0100
+++ b/xen/arch/x86/hvm/vmx/vmx.c Tue Jun 05 10:08:09 2007 +0100
@@ -929,7 +929,8 @@ static unsigned long vmx_get_segment_bas
ASSERT(v == current);
#ifdef __x86_64__
- if ( vmx_long_mode_enabled(v) && (__vmread(GUEST_CS_AR_BYTES) & (1u<<13)) )
+ if ( vmx_long_mode_enabled(v) &&
+ (__vmread(GUEST_CS_AR_BYTES) & X86_SEG_AR_CS_LM_ACTIVE) )
long_mode = 1;
#endif
@@ -1097,9 +1098,10 @@ static int vmx_guest_x86_mode(struct vcp
if ( unlikely(__vmread(GUEST_RFLAGS) & X86_EFLAGS_VM) )
return 1;
cs_ar_bytes = __vmread(GUEST_CS_AR_BYTES);
- if ( vmx_long_mode_enabled(v) && likely(cs_ar_bytes & (1u<<13)) )
+ if ( vmx_long_mode_enabled(v) && likely(cs_ar_bytes &
+ X86_SEG_AR_CS_LM_ACTIVE) )
return 8;
- return (likely(cs_ar_bytes & (1u<<14)) ? 4 : 2);
+ return (likely(cs_ar_bytes & X86_SEG_AR_DEF_OP_SIZE) ? 4 : 2);
}
static int vmx_pae_enabled(struct vcpu *v)
@@ -1452,65 +1454,73 @@ static void vmx_do_invlpg(unsigned long
paging_invlpg(v, va);
}
-
-static int vmx_check_descriptor(int long_mode, unsigned long eip, int inst_len,
- enum x86_segment seg, unsigned long *base,
- u32 *limit, u32 *ar_bytes)
+/*
+ * get segment for string pio according to guest instruction
+ */
+static void vmx_str_pio_get_segment(int long_mode, unsigned long eip,
+ int inst_len, enum x86_segment *seg)
+{
+ unsigned char inst[MAX_INST_LEN];
+ int i;
+ extern int inst_copy_from_guest(unsigned char *, unsigned long, int);
+
+ if ( !long_mode )
+ eip += __vmread(GUEST_CS_BASE);
+
+ memset(inst, 0, MAX_INST_LEN);
+ if ( inst_copy_from_guest(inst, eip, inst_len) != inst_len )
+ {
+ gdprintk(XENLOG_ERR, "Get guest instruction failed\n");
+ domain_crash(current->domain);
+ return;
+ }
+
+ for ( i = 0; i < inst_len; i++ )
+ {
+ switch ( inst[i] )
+ {
+ case 0xf3: /* REPZ */
+ case 0xf2: /* REPNZ */
+ case 0xf0: /* LOCK */
+ case 0x66: /* data32 */
+ case 0x67: /* addr32 */
+#ifdef __x86_64__
+ case 0x40 ... 0x4f: /* REX */
+#endif
+ continue;
+ case 0x2e: /* CS */
+ *seg = x86_seg_cs;
+ continue;
+ case 0x36: /* SS */
+ *seg = x86_seg_ss;
+ continue;
+ case 0x26: /* ES */
+ *seg = x86_seg_es;
+ continue;
+ case 0x64: /* FS */
+ *seg = x86_seg_fs;
+ continue;
+ case 0x65: /* GS */
+ *seg = x86_seg_gs;
+ continue;
+ case 0x3e: /* DS */
+ *seg = x86_seg_ds;
+ continue;
+ }
+ }
+}
+
+static int vmx_str_pio_check_descriptor(int long_mode, unsigned long eip,
+ int inst_len, enum x86_segment seg,
+ unsigned long *base, u32 *limit,
+ u32 *ar_bytes)
{
enum vmcs_field ar_field, base_field, limit_field;
*base = 0;
*limit = 0;
if ( seg != x86_seg_es )
- {
- unsigned char inst[MAX_INST_LEN];
- int i;
- extern int inst_copy_from_guest(unsigned char *, unsigned long, int);
-
- if ( !long_mode )
- eip += __vmread(GUEST_CS_BASE);
- memset(inst, 0, MAX_INST_LEN);
- if ( inst_copy_from_guest(inst, eip, inst_len) != inst_len )
- {
- gdprintk(XENLOG_ERR, "Get guest instruction failed\n");
- domain_crash(current->domain);
- return 0;
- }
-
- for ( i = 0; i < inst_len; i++ )
- {
- switch ( inst[i] )
- {
- case 0xf3: /* REPZ */
- case 0xf2: /* REPNZ */
- case 0xf0: /* LOCK */
- case 0x66: /* data32 */
- case 0x67: /* addr32 */
-#ifdef __x86_64__
- case 0x40 ... 0x4f: /* REX */
-#endif
- continue;
- case 0x2e: /* CS */
- seg = x86_seg_cs;
- continue;
- case 0x36: /* SS */
- seg = x86_seg_ss;
- continue;
- case 0x26: /* ES */
- seg = x86_seg_es;
- continue;
- case 0x64: /* FS */
- seg = x86_seg_fs;
- continue;
- case 0x65: /* GS */
- seg = x86_seg_gs;
- continue;
- case 0x3e: /* DS */
- seg = x86_seg_ds;
- continue;
- }
- }
- }
+ vmx_str_pio_get_segment(long_mode, eip, inst_len, &seg);
switch ( seg )
{
@@ -1559,30 +1569,172 @@ static int vmx_check_descriptor(int long
return !(*ar_bytes & 0x10000);
}
-static void vmx_io_instruction(unsigned long exit_qualification,
- unsigned long inst_len)
-{
- struct cpu_user_regs *regs;
- struct hvm_io_op *pio_opp;
+
+static inline void vmx_str_pio_check_limit(u32 limit, unsigned int size,
+ u32 ar_bytes, unsigned long addr,
+ unsigned long base, int df,
+ unsigned long *count)
+{
+ unsigned long ea = addr - base;
+
+ /* Offset must be within limits. */
+ ASSERT(ea == (u32)ea);
+ if ( (u32)(ea + size - 1) < (u32)ea ||
+ (ar_bytes & 0xc) != 0x4 ? ea + size - 1 > limit
+ : ea <= limit )
+ {
+ vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
+ return;
+ }
+
+ /* Check the limit for repeated instructions, as above we checked
+ only the first instance. Truncate the count if a limit violation
+ would occur. Note that the checking is not necessary for page
+ granular segments as transfers crossing page boundaries will be
+ broken up anyway. */
+ if ( !(ar_bytes & X86_SEG_AR_GRANULARITY) && *count > 1 )
+ {
+ if ( (ar_bytes & 0xc) != 0x4 )
+ {
+ /* expand-up */
+ if ( !df )
+ {
+ if ( ea + *count * size - 1 < ea ||
+ ea + *count * size - 1 > limit )
+ *count = (limit + 1UL - ea) / size;
+ }
+ else
+ {
+ if ( *count - 1 > ea / size )
+ *count = ea / size + 1;
+ }
+ }
+ else
+ {
+ /* expand-down */
+ if ( !df )
+ {
+ if ( *count - 1 > -(s32)ea / size )
+ *count = -(s32)ea / size + 1UL;
+ }
+ else
+ {
+ if ( ea < (*count - 1) * size ||
+ ea - (*count - 1) * size <= limit )
+ *count = (ea - limit - 1) / size + 1;
+ }
+ }
+ ASSERT(*count);
+ }
+}
+
+#ifdef __x86_64__
+static inline void vmx_str_pio_lm_check_limit(struct cpu_user_regs *regs,
+ unsigned int size,
+ unsigned long addr,
+ unsigned long *count)
+{
+ if ( !is_canonical_address(addr) ||
+ !is_canonical_address(addr + size - 1) )
+ {
+ vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
+ return;
+ }
+ if ( *count > (1UL << 48) / size )
+ *count = (1UL << 48) / size;
+ if ( !(regs->eflags & EF_DF) )
+ {
+ if ( addr + *count * size - 1 < addr ||
+ !is_canonical_address(addr + *count * size - 1) )
+ *count = (addr & ~((1UL << 48) - 1)) / size;
+ }
+ else
+ {
+ if ( (*count - 1) * size > addr ||
+ !is_canonical_address(addr + (*count - 1) * size) )
+ *count = (addr & ~((1UL << 48) - 1)) / size + 1;
+ }
+ ASSERT(*count);
+}
+#endif
+
+static inline void vmx_send_str_pio(struct cpu_user_regs *regs,
+ struct hvm_io_op *pio_opp,
+ unsigned long inst_len, unsigned int port,
+ int sign, unsigned int size, int dir,
+ int df, unsigned long addr,
+ unsigned long paddr, unsigned long count)
+{
+ /*
+ * Handle string pio instructions that cross pages or that
+ * are unaligned. See the comments in hvm_domain.c/handle_mmio()
+ */
+ if ( (addr & PAGE_MASK) != ((addr + size - 1) & PAGE_MASK) ) {
+ unsigned long value = 0;
+
+ pio_opp->flags |= OVERLAP;
+
+ if ( dir == IOREQ_WRITE ) /* OUTS */
+ {
+ if ( hvm_paging_enabled(current) )
+ {
+ int rv = hvm_copy_from_guest_virt(&value, addr, size);
+ if ( rv != 0 )
+ {
+ /* Failed on the page-spanning copy. Inject PF into
+ * the guest for the address where we failed. */
+ addr += size - rv;
+ gdprintk(XENLOG_DEBUG, "Pagefault reading non-io side "
+ "of a page-spanning PIO: va=%#lx\n", addr);
+ vmx_inject_exception(TRAP_page_fault, 0, addr);
+ return;
+ }
+ }
+ else
+ (void) hvm_copy_from_guest_phys(&value, addr, size);
+ } else /* dir != IOREQ_WRITE */
+ /* Remember where to write the result, as a *VA*.
+ * Must be a VA so we can handle the page overlap
+ * correctly in hvm_pio_assist() */
+ pio_opp->addr = addr;
+
+ if ( count == 1 )
+ regs->eip += inst_len;
+
+ send_pio_req(port, 1, size, value, dir, df, 0);
+ } else {
+ unsigned long last_addr = sign > 0 ? addr + count * size - 1
+ : addr - (count - 1) * size;
+
+ if ( (addr & PAGE_MASK) != (last_addr & PAGE_MASK) )
+ {
+ if ( sign > 0 )
+ count = (PAGE_SIZE - (addr & ~PAGE_MASK)) / size;
+ else
+ count = (addr & ~PAGE_MASK) / size + 1;
+ } else
+ regs->eip += inst_len;
+
+ send_pio_req(port, count, size, paddr, dir, df, 1);
+ }
+}
+
+static void vmx_str_pio_handler(unsigned long exit_qualification,
+ unsigned long inst_len,
+ struct cpu_user_regs *regs,
+ struct hvm_io_op *pio_opp)
+{
unsigned int port, size;
int dir, df, vm86;
-
- pio_opp = ¤t->arch.hvm_vcpu.io_op;
- pio_opp->instr = INSTR_PIO;
- pio_opp->flags = 0;
-
- regs = &pio_opp->io_context;
-
- /* Copy current guest state into io instruction state structure. */
- memcpy(regs, guest_cpu_user_regs(), HVM_CONTEXT_STACK_BYTES);
- hvm_store_cpu_guest_regs(current, regs, NULL);
+ unsigned long addr, count = 1, base;
+ paddr_t paddr;
+ unsigned long gfn;
+ u32 ar_bytes, limit;
+ int sign;
+ int long_mode = 0;
vm86 = regs->eflags & X86_EFLAGS_VM ? 1 : 0;
df = regs->eflags & X86_EFLAGS_DF ? 1 : 0;
-
- HVM_DBG_LOG(DBG_LEVEL_IO, "vm86 %d, eip=%x:%lx, "
- "exit_qualification = %lx",
- vm86, regs->cs, (unsigned long)regs->eip, exit_qualification);
if ( test_bit(6, &exit_qualification) )
port = (exit_qualification >> 16) & 0xFFFF;
@@ -1592,201 +1744,122 @@ static void vmx_io_instruction(unsigned
size = (exit_qualification & 7) + 1;
dir = test_bit(3, &exit_qualification); /* direction */
- if (dir==IOREQ_READ)
+ if ( dir == IOREQ_READ )
HVMTRACE_2D(IO_READ, current, port, size);
else
HVMTRACE_2D(IO_WRITE, current, port, size);
- if ( test_bit(4, &exit_qualification) ) { /* string instruction */
- unsigned long addr, count = 1, base;
- paddr_t paddr;
- unsigned long gfn;
- u32 ar_bytes, limit;
- int sign = regs->eflags & X86_EFLAGS_DF ? -1 : 1;
- int long_mode = 0;
-
- ar_bytes = __vmread(GUEST_CS_AR_BYTES);
+ sign = regs->eflags & X86_EFLAGS_DF ? -1 : 1;
+ ar_bytes = __vmread(GUEST_CS_AR_BYTES);
#ifdef __x86_64__
- if ( vmx_long_mode_enabled(current) && (ar_bytes & (1u<<13)) )
- long_mode = 1;
+ if ( vmx_long_mode_enabled(current) &&
+ (ar_bytes & X86_SEG_AR_CS_LM_ACTIVE) )
+ long_mode = 1;
#endif
- addr = __vmread(GUEST_LINEAR_ADDRESS);
-
- if ( test_bit(5, &exit_qualification) ) { /* "rep" prefix */
- pio_opp->flags |= REPZ;
- count = regs->ecx;
- if ( !long_mode && (vm86 || !(ar_bytes & (1u<<14))) )
- count &= 0xFFFF;
- }
-
- /*
- * In protected mode, guest linear address is invalid if the
- * selector is null.
- */
- if ( !vmx_check_descriptor(long_mode, regs->eip, inst_len,
- dir==IOREQ_WRITE ? x86_seg_ds : x86_seg_es,
- &base, &limit, &ar_bytes) ) {
- if ( !long_mode ) {
- vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
- return;
- }
- addr = dir == IOREQ_WRITE ? base + regs->esi : regs->edi;
- }
-
+ addr = __vmread(GUEST_LINEAR_ADDRESS);
+
+ if ( test_bit(5, &exit_qualification) ) { /* "rep" prefix */
+ pio_opp->flags |= REPZ;
+ count = regs->ecx;
+ if ( !long_mode &&
+ (vm86 || !(ar_bytes & X86_SEG_AR_DEF_OP_SIZE)) )
+ count &= 0xFFFF;
+ }
+
+ /*
+ * In protected mode, guest linear address is invalid if the
+ * selector is null.
+ */
+ if ( !vmx_str_pio_check_descriptor(long_mode, regs->eip, inst_len,
+ dir==IOREQ_WRITE ? x86_seg_ds :
+ x86_seg_es, &base, &limit,
+ &ar_bytes) ) {
if ( !long_mode ) {
- unsigned long ea = addr - base;
-
- /* Segment must be readable for outs and writeable for ins. */
- if ( dir == IOREQ_WRITE ? (ar_bytes & 0xa) == 0x8
- : (ar_bytes & 0xa) != 0x2 ) {
- vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
- return;
- }
-
- /* Offset must be within limits. */
- ASSERT(ea == (u32)ea);
- if ( (u32)(ea + size - 1) < (u32)ea ||
- (ar_bytes & 0xc) != 0x4 ? ea + size - 1 > limit
- : ea <= limit )
- {
- vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
- return;
- }
-
- /* Check the limit for repeated instructions, as above we checked
- only the first instance. Truncate the count if a limit violation
- would occur. Note that the checking is not necessary for page
- granular segments as transfers crossing page boundaries will be
- broken up anyway. */
- if ( !(ar_bytes & (1u<<15)) && count > 1 )
- {
- if ( (ar_bytes & 0xc) != 0x4 )
- {
- /* expand-up */
- if ( !df )
- {
- if ( ea + count * size - 1 < ea ||
- ea + count * size - 1 > limit )
- count = (limit + 1UL - ea) / size;
- }
- else
- {
- if ( count - 1 > ea / size )
- count = ea / size + 1;
- }
- }
- else
- {
- /* expand-down */
- if ( !df )
- {
- if ( count - 1 > -(s32)ea / size )
- count = -(s32)ea / size + 1UL;
- }
- else
- {
- if ( ea < (count - 1) * size ||
- ea - (count - 1) * size <= limit )
- count = (ea - limit - 1) / size + 1;
- }
- }
- ASSERT(count);
- }
- }
+ vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
+ return;
+ }
+ addr = dir == IOREQ_WRITE ? base + regs->esi : regs->edi;
+ }
+
+ if ( !long_mode )
+ {
+ /* Segment must be readable for outs and writeable for ins. */
+ if ( dir == IOREQ_WRITE ? (ar_bytes & 0xa) == 0x8
+ : (ar_bytes & 0xa) != 0x2 ) {
+ vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
+ return;
+ }
+
+ vmx_str_pio_check_limit(limit, size, ar_bytes, addr, base, df, &count);
+ }
#ifdef __x86_64__
+ else
+ {
+ vmx_str_pio_lm_check_limit(regs, size, addr, &count);
+ }
+#endif
+
+ /* Translate the address to a physical address */
+ gfn = paging_gva_to_gfn(current, addr);
+ if ( gfn == INVALID_GFN )
+ {
+ /* The guest does not have the RAM address mapped.
+ * Need to send in a page fault */
+ int errcode = 0;
+ /* IO read --> memory write */
+ if ( dir == IOREQ_READ ) errcode |= PFEC_write_access;
+ vmx_inject_exception(TRAP_page_fault, errcode, addr);
+ return;
+ }
+ paddr = (paddr_t)gfn << PAGE_SHIFT | (addr & ~PAGE_MASK);
+
+ vmx_send_str_pio(regs, pio_opp, inst_len, port, sign,
+ size, dir, df, addr, paddr, count);
+}
+
+static void vmx_io_instruction(unsigned long exit_qualification,
+ unsigned long inst_len)
+{
+ struct cpu_user_regs *regs;
+ struct hvm_io_op *pio_opp;
+
+ pio_opp = ¤t->arch.hvm_vcpu.io_op;
+ pio_opp->instr = INSTR_PIO;
+ pio_opp->flags = 0;
+
+ regs = &pio_opp->io_context;
+
+ /* Copy current guest state into io instruction state structure. */
+ memcpy(regs, guest_cpu_user_regs(), HVM_CONTEXT_STACK_BYTES);
+ hvm_store_cpu_guest_regs(current, regs, NULL);
+
+ HVM_DBG_LOG(DBG_LEVEL_IO, "vm86 %d, eip=%x:%lx, "
+ "exit_qualification = %lx",
+ regs->eflags & X86_EFLAGS_VM ? 1 : 0,
+ regs->cs, (unsigned long)regs->eip, exit_qualification);
+
+ if ( test_bit(4, &exit_qualification) ) /* string instrucation */
+ vmx_str_pio_handler(exit_qualification, inst_len, regs, pio_opp);
+ else
+ {
+ unsigned int port, size;
+ int dir, df;
+
+ df = regs->eflags & X86_EFLAGS_DF ? 1 : 0;
+
+ if ( test_bit(6, &exit_qualification) )
+ port = (exit_qualification >> 16) & 0xFFFF;
else
- {
- if ( !is_canonical_address(addr) ||
- !is_canonical_address(addr + size - 1) )
- {
- vmx_inject_hw_exception(current, TRAP_gp_fault, 0);
- return;
- }
- if ( count > (1UL << 48) / size )
- count = (1UL << 48) / size;
- if ( !(regs->eflags & EF_DF) )
- {
- if ( addr + count * size - 1 < addr ||
- !is_canonical_address(addr + count * size - 1) )
- count = (addr & ~((1UL << 48) - 1)) / size;
- }
- else
- {
- if ( (count - 1) * size > addr ||
- !is_canonical_address(addr + (count - 1) * size) )
- count = (addr & ~((1UL << 48) - 1)) / size + 1;
- }
- ASSERT(count);
- }
-#endif
-
- /* Translate the address to a physical address */
- gfn = paging_gva_to_gfn(current, addr);
- if ( gfn == INVALID_GFN )
- {
- /* The guest does not have the RAM address mapped.
- * Need to send in a page fault */
- int errcode = 0;
- /* IO read --> memory write */
- if ( dir == IOREQ_READ ) errcode |= PFEC_write_access;
- vmx_inject_exception(TRAP_page_fault, errcode, addr);
- return;
- }
- paddr = (paddr_t)gfn << PAGE_SHIFT | (addr & ~PAGE_MASK);
-
- /*
- * Handle string pio instructions that cross pages or that
- * are unaligned. See the comments in hvm_domain.c/handle_mmio()
- */
- if ( (addr & PAGE_MASK) != ((addr + size - 1) & PAGE_MASK) ) {
- unsigned long value = 0;
-
- pio_opp->flags |= OVERLAP;
-
- if ( dir == IOREQ_WRITE ) /* OUTS */
- {
- if ( hvm_paging_enabled(current) )
- {
- int rv = hvm_copy_from_guest_virt(&value, addr, size);
- if ( rv != 0 )
- {
- /* Failed on the page-spanning copy. Inject PF into
- * the guest for the address where we failed. */
- addr += size - rv;
- gdprintk(XENLOG_DEBUG, "Pagefault reading non-io side "
- "of a page-spanning PIO: va=%#lx\n", addr);
- vmx_inject_exception(TRAP_page_fault, 0, addr);
- return;
- }
- }
- else
- (void) hvm_copy_from_guest_phys(&value, addr, size);
- } else /* dir != IOREQ_WRITE */
- /* Remember where to write the result, as a *VA*.
- * Must be a VA so we can handle the page overlap
- * correctly in hvm_pio_assist() */
- pio_opp->addr = addr;
-
- if ( count == 1 )
- regs->eip += inst_len;
-
- send_pio_req(port, 1, size, value, dir, df, 0);
- } else {
- unsigned long last_addr = sign > 0 ? addr + count * size - 1
- : addr - (count - 1) * size;
-
- if ( (addr & PAGE_MASK) != (last_addr & PAGE_MASK) )
- {
- if ( sign > 0 )
- count = (PAGE_SIZE - (addr & ~PAGE_MASK)) / size;
- else
- count = (addr & ~PAGE_MASK) / size + 1;
- } else
- regs->eip += inst_len;
-
- send_pio_req(port, count, size, paddr, dir, df, 1);
- }
- } else {
+ port = regs->edx & 0xffff;
+
+ size = (exit_qualification & 7) + 1;
+ dir = test_bit(3, &exit_qualification); /* direction */
+
+ if ( dir == IOREQ_READ )
+ HVMTRACE_2D(IO_READ, current, port, size);
+ else
+ HVMTRACE_2D(IO_WRITE, current, port, size);
+
if ( port == 0xe9 && dir == IOREQ_WRITE && size == 1 )
hvm_print_line(current, regs->eax); /* guest debug output */
diff -r 91301122db51 -r 4f05a587cb6b xen/include/asm-x86/hvm/vmx/vmx.h
--- a/xen/include/asm-x86/hvm/vmx/vmx.h Tue Jun 05 10:00:15 2007 +0100
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h Tue Jun 05 10:08:09 2007 +0100
@@ -130,6 +130,19 @@ void vmx_vlapic_msr_changed(struct vcpu
#define TYPE_MOV_FROM_DR (1 << 4)
#define DEBUG_REG_ACCESS_REG 0xf00 /* 11:8, general purpose
register */
+/*
+ * Access Rights
+ */
+#define X86_SEG_AR_SEG_TYPE 0xf /* 3:0, segment type */
+#define X86_SEG_AR_DESC_TYPE (1u << 4) /* 4, descriptor type */
+#define X86_SEG_AR_DPL 0x60 /* 6:5, descriptor privilege level
*/
+#define X86_SEG_AR_SEG_PRESENT (1u << 7) /* 7, segment present */
+#define X86_SEG_AR_AVL (1u << 12) /* 12, available for system
software */
+#define X86_SEG_AR_CS_LM_ACTIVE (1u << 13) /* 13, long mode active (CS only) */
+#define X86_SEG_AR_DEF_OP_SIZE (1u << 14) /* 14, default operation size */
+#define X86_SEG_AR_GRANULARITY (1u << 15) /* 15, granularity */
+#define X86_SEG_AR_SEG_UNUSABLE (1u << 16) /* 16, segment unusable */
+
/* These bits in the CR4 are owned by the host */
#if CONFIG_PAGING_LEVELS >= 3
#define VMX_CR4_HOST_MASK (X86_CR4_VMXE | X86_CR4_PAE)
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