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x86: Fix HVM hypercall preemption causing guest crash.
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
This commit is contained in:
Keir Fraser committed
1 parent
68bd84ba36
commit
c8e525b16b
1 file changed
+6
-1
@@ -1506,7 +1506,12 @@ unsigned long hypercall_create_continuation(
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{
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regs = guest_cpu_user_regs();
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regs->eax = op;
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regs->eip -= 2; /* re-execute 'syscall' / 'int 0x82' */
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/*
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* For PV guest, we update EIP to re-execute 'syscall' / 'int 0x82';
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* HVM does not need this since 'vmcall' / 'vmmcall' is fault-like.
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*/
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if ( !is_hvm_vcpu(current) )
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regs->eip -= 2; /* re-execute 'syscall' / 'int 0x82' */
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#ifdef __x86_64__
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if ( !is_hvm_vcpu(current) ?
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