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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] x86/HVM: use unambiguous register names
commit 5117ee012c626f3af8f31e1b8212b493128d33e5
Author: Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Dec 21 17:00:40 2016 +0100
Commit: Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Dec 21 17:00:40 2016 +0100
x86/HVM: use unambiguous register names
This is in preparation of eliminating the mis-naming of 64-bit fields
with 32-bit register names (eflags instead of rflags etc). Use the
guaranteed 32-bit underscore prefixed names for now where appropriate.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 133 +++++++++++++++++++-------------------
xen/include/asm-x86/hvm/support.h | 2 +-
2 files changed, 67 insertions(+), 68 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 12a6f46..708f474 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -882,16 +882,16 @@ static int hvm_save_cpu_ctxt(struct domain *d,
hvm_domain_context_t *h)
ctxt.flags = XEN_X86_FPU_INITIALISED;
}
- ctxt.rax = v->arch.user_regs.eax;
- ctxt.rbx = v->arch.user_regs.ebx;
- ctxt.rcx = v->arch.user_regs.ecx;
- ctxt.rdx = v->arch.user_regs.edx;
- ctxt.rbp = v->arch.user_regs.ebp;
- ctxt.rsi = v->arch.user_regs.esi;
- ctxt.rdi = v->arch.user_regs.edi;
- ctxt.rsp = v->arch.user_regs.esp;
- ctxt.rip = v->arch.user_regs.eip;
- ctxt.rflags = v->arch.user_regs.eflags;
+ ctxt.rax = v->arch.user_regs.rax;
+ ctxt.rbx = v->arch.user_regs.rbx;
+ ctxt.rcx = v->arch.user_regs.rcx;
+ ctxt.rdx = v->arch.user_regs.rdx;
+ ctxt.rbp = v->arch.user_regs.rbp;
+ ctxt.rsi = v->arch.user_regs.rsi;
+ ctxt.rdi = v->arch.user_regs.rdi;
+ ctxt.rsp = v->arch.user_regs.rsp;
+ ctxt.rip = v->arch.user_regs.rip;
+ ctxt.rflags = v->arch.user_regs.rflags;
ctxt.r8 = v->arch.user_regs.r8;
ctxt.r9 = v->arch.user_regs.r9;
ctxt.r10 = v->arch.user_regs.r10;
@@ -1197,16 +1197,16 @@ static int hvm_load_cpu_ctxt(struct domain *d,
hvm_domain_context_t *h)
if ( xsave_area )
xsave_area->xsave_hdr.xcomp_bv = 0;
- v->arch.user_regs.eax = ctxt.rax;
- v->arch.user_regs.ebx = ctxt.rbx;
- v->arch.user_regs.ecx = ctxt.rcx;
- v->arch.user_regs.edx = ctxt.rdx;
- v->arch.user_regs.ebp = ctxt.rbp;
- v->arch.user_regs.esi = ctxt.rsi;
- v->arch.user_regs.edi = ctxt.rdi;
- v->arch.user_regs.esp = ctxt.rsp;
- v->arch.user_regs.eip = ctxt.rip;
- v->arch.user_regs.eflags = ctxt.rflags | X86_EFLAGS_MBS;
+ v->arch.user_regs.rax = ctxt.rax;
+ v->arch.user_regs.rbx = ctxt.rbx;
+ v->arch.user_regs.rcx = ctxt.rcx;
+ v->arch.user_regs.rdx = ctxt.rdx;
+ v->arch.user_regs.rbp = ctxt.rbp;
+ v->arch.user_regs.rsi = ctxt.rsi;
+ v->arch.user_regs.rdi = ctxt.rdi;
+ v->arch.user_regs.rsp = ctxt.rsp;
+ v->arch.user_regs.rip = ctxt.rip;
+ v->arch.user_regs.rflags = ctxt.rflags | X86_EFLAGS_MBS;
v->arch.user_regs.r8 = ctxt.r8;
v->arch.user_regs.r9 = ctxt.r9;
v->arch.user_regs.r10 = ctxt.r10;
@@ -1658,7 +1658,7 @@ void hvm_vcpu_down(struct vcpu *v)
}
}
-void hvm_hlt(unsigned long rflags)
+void hvm_hlt(unsigned int eflags)
{
struct vcpu *curr = current;
@@ -1670,7 +1670,7 @@ void hvm_hlt(unsigned long rflags)
* want to shut down. In a real processor, NMIs are the only way to break
* out of this.
*/
- if ( unlikely(!(rflags & X86_EFLAGS_IF)) )
+ if ( unlikely(!(eflags & X86_EFLAGS_IF)) )
return hvm_vcpu_down(curr);
do_sched_op(SCHEDOP_block, guest_handle_from_ptr(NULL, void));
@@ -2901,7 +2901,7 @@ void hvm_task_switch(
struct segment_register gdt, tr, prev_tr, segr;
struct desc_struct *optss_desc = NULL, *nptss_desc = NULL, tss_desc;
bool_t otd_writable, ntd_writable;
- unsigned long eflags;
+ unsigned int eflags;
pagefault_info_t pfinfo;
int exn_raised, rc;
struct {
@@ -2975,20 +2975,20 @@ void hvm_task_switch(
if ( rc != HVMCOPY_okay )
goto out;
- eflags = regs->eflags;
+ eflags = regs->_eflags;
if ( taskswitch_reason == TSW_iret )
eflags &= ~X86_EFLAGS_NT;
- tss.eip = regs->eip;
+ tss.eip = regs->_eip;
tss.eflags = eflags;
- tss.eax = regs->eax;
- tss.ecx = regs->ecx;
- tss.edx = regs->edx;
- tss.ebx = regs->ebx;
- tss.esp = regs->esp;
- tss.ebp = regs->ebp;
- tss.esi = regs->esi;
- tss.edi = regs->edi;
+ tss.eax = regs->_eax;
+ tss.ecx = regs->_ecx;
+ tss.edx = regs->_edx;
+ tss.ebx = regs->_ebx;
+ tss.esp = regs->_esp;
+ tss.ebp = regs->_ebp;
+ tss.esi = regs->_esi;
+ tss.edi = regs->_edi;
hvm_get_segment_register(v, x86_seg_es, &segr);
tss.es = segr.sel;
@@ -3032,16 +3032,16 @@ void hvm_task_switch(
if ( hvm_set_cr3(tss.cr3, 1) )
goto out;
- regs->eip = tss.eip;
- regs->eflags = tss.eflags | 2;
- regs->eax = tss.eax;
- regs->ecx = tss.ecx;
- regs->edx = tss.edx;
- regs->ebx = tss.ebx;
- regs->esp = tss.esp;
- regs->ebp = tss.ebp;
- regs->esi = tss.esi;
- regs->edi = tss.edi;
+ regs->rip = tss.eip;
+ regs->rflags = tss.eflags | X86_EFLAGS_MBS;
+ regs->rax = tss.eax;
+ regs->rcx = tss.ecx;
+ regs->rdx = tss.edx;
+ regs->rbx = tss.ebx;
+ regs->rsp = tss.esp;
+ regs->rbp = tss.ebp;
+ regs->rsi = tss.esi;
+ regs->rdi = tss.edi;
exn_raised = 0;
if ( hvm_load_segment_selector(x86_seg_es, tss.es, tss.eflags) ||
@@ -3054,7 +3054,7 @@ void hvm_task_switch(
if ( taskswitch_reason == TSW_call_or_int )
{
- regs->eflags |= X86_EFLAGS_NT;
+ regs->_eflags |= X86_EFLAGS_NT;
tss.back_link = prev_tr.sel;
rc = hvm_copy_to_guest_linear(tr.base + offsetof(typeof(tss),
back_link),
@@ -4017,7 +4017,7 @@ void hvm_ud_intercept(struct cpu_user_regs *regs)
unsigned long addr;
char sig[5]; /* ud2; .ascii "xen" */
- if ( hvm_virtual_to_linear_addr(x86_seg_cs, cs, regs->eip,
+ if ( hvm_virtual_to_linear_addr(x86_seg_cs, cs, regs->rip,
sizeof(sig), hvm_access_insn_fetch,
(hvm_long_mode_enabled(cur) &&
cs->attr.fields.l) ? 64 :
@@ -4026,12 +4026,12 @@ void hvm_ud_intercept(struct cpu_user_regs *regs)
walk, NULL) == HVMCOPY_okay) &&
(memcmp(sig, "\xf\xbxen", sizeof(sig)) == 0) )
{
- regs->eip += sizeof(sig);
- regs->eflags &= ~X86_EFLAGS_RF;
+ regs->rip += sizeof(sig);
+ regs->_eflags &= ~X86_EFLAGS_RF;
/* Zero the upper 32 bits of %rip if not in 64bit mode. */
if ( !(hvm_long_mode_enabled(cur) && cs->attr.fields.l) )
- regs->eip = regs->_eip;
+ regs->rip = regs->_eip;
add_taint(TAINT_HVM_FEP);
@@ -4075,7 +4075,7 @@ enum hvm_intblk hvm_interrupt_blocked(struct vcpu *v,
struct hvm_intack intack)
}
if ( (intack.source != hvm_intsrc_nmi) &&
- !(guest_cpu_user_regs()->eflags & X86_EFLAGS_IF) )
+ !(guest_cpu_user_regs()->_eflags & X86_EFLAGS_IF) )
return hvm_intblk_rflags_ie;
intr_shadow = hvm_funcs.get_interrupt_shadow(v);
@@ -4268,7 +4268,7 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
if ( unlikely(hvm_get_cpl(curr)) )
{
default:
- regs->eax = -EPERM;
+ regs->rax = -EPERM;
return HVM_HCALL_completed;
}
case 0:
@@ -4284,7 +4284,7 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
if ( (eax >= ARRAY_SIZE(hvm_hypercall_table)) ||
!hvm_hypercall_table[eax].native )
{
- regs->eax = -ENOSYS;
+ regs->rax = -ENOSYS;
return HVM_HCALL_completed;
}
@@ -4330,9 +4330,9 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
case 6: regs->r9 = 0xdeadbeefdeadf00dUL;
case 5: regs->r8 = 0xdeadbeefdeadf00dUL;
case 4: regs->r10 = 0xdeadbeefdeadf00dUL;
- case 3: regs->edx = 0xdeadbeefdeadf00dUL;
- case 2: regs->esi = 0xdeadbeefdeadf00dUL;
- case 1: regs->edi = 0xdeadbeefdeadf00dUL;
+ case 3: regs->rdx = 0xdeadbeefdeadf00dUL;
+ case 2: regs->rsi = 0xdeadbeefdeadf00dUL;
+ case 1: regs->rdi = 0xdeadbeefdeadf00dUL;
}
}
#endif
@@ -4362,8 +4362,8 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
}
#endif
- regs->_eax = hvm_hypercall_table[eax].compat(ebx, ecx, edx, esi, edi,
- ebp);
+ regs->rax = hvm_hypercall_table[eax].compat(ebx, ecx, edx, esi, edi,
+ ebp);
#ifndef NDEBUG
if ( !curr->arch.hvm_vcpu.hcall_preempted )
@@ -4371,19 +4371,18 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
/* Deliberately corrupt parameter regs used by this hypercall. */
switch ( hypercall_args_table[eax].compat )
{
- case 6: regs->ebp = 0xdeadf00d;
- case 5: regs->edi = 0xdeadf00d;
- case 4: regs->esi = 0xdeadf00d;
- case 3: regs->edx = 0xdeadf00d;
- case 2: regs->ecx = 0xdeadf00d;
- case 1: regs->ebx = 0xdeadf00d;
+ case 6: regs->rbp = 0xdeadf00d;
+ case 5: regs->rdi = 0xdeadf00d;
+ case 4: regs->rsi = 0xdeadf00d;
+ case 3: regs->rdx = 0xdeadf00d;
+ case 2: regs->rcx = 0xdeadf00d;
+ case 1: regs->rbx = 0xdeadf00d;
}
}
#endif
}
- HVM_DBG_LOG(DBG_LEVEL_HCALL, "hcall%lu -> %lx",
- eax, (unsigned long)regs->eax);
+ HVM_DBG_LOG(DBG_LEVEL_HCALL, "hcall%lu -> %lx", eax, regs->rax);
if ( curr->arch.hvm_vcpu.hcall_preempted )
return HVM_HCALL_preempted;
@@ -4503,9 +4502,9 @@ void hvm_vcpu_reset_state(struct vcpu *v, uint16_t cs,
uint16_t ip)
v->arch.vgc_flags = VGCF_online;
memset(&v->arch.user_regs, 0, sizeof(v->arch.user_regs));
- v->arch.user_regs.eflags = X86_EFLAGS_MBS;
- v->arch.user_regs.edx = 0x00000f00;
- v->arch.user_regs.eip = ip;
+ v->arch.user_regs.rflags = X86_EFLAGS_MBS;
+ v->arch.user_regs.rdx = 0x00000f00;
+ v->arch.user_regs.rip = ip;
memset(&v->arch.debugreg, 0, sizeof(v->arch.debugreg));
v->arch.hvm_vcpu.guest_cr[0] = X86_CR0_ET;
diff --git a/xen/include/asm-x86/hvm/support.h
b/xen/include/asm-x86/hvm/support.h
index 3d767d7..ba5899c 100644
--- a/xen/include/asm-x86/hvm/support.h
+++ b/xen/include/asm-x86/hvm/support.h
@@ -108,7 +108,7 @@ enum hvm_copy_result hvm_fetch_from_guest_linear(
#define HVM_HCALL_invalidate 2 /* invalidate ioemu-dm memory cache */
int hvm_do_hypercall(struct cpu_user_regs *pregs);
-void hvm_hlt(unsigned long rflags);
+void hvm_hlt(unsigned int eflags);
void hvm_triple_fault(void);
void hvm_rdtsc_intercept(struct cpu_user_regs *regs);
--
generated by git-patchbot for /home/xen/git/xen.git#master
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