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Home » Mailing list archives » linux-kernel » 2007 » September » 17

[PATCH 098/104] KVM: x86 emulator: imlpement jump conditional relative

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From: Avi Kivity <avi@...>
To: <kvm-devel@...>
Cc: <linux-kernel@...>, Nitin A Kamble <nitin.a.kamble@...>
Subject: [PATCH 098/104] KVM: x86 emulator: imlpement jump conditional relative
Date: Monday, September 17, 2007 - 4:32 am

From: Nitin A Kamble <nitin.a.kamble@intel.com>

Implement emulation of instruction:
    jump conditional rel
    opcodes: 0x0f 0x80 - 0x0f 0x8f

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
 drivers/kvm/x86_emulate.c |   61 ++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 60 insertions(+), 1 deletions(-)

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index e4ce34c..ba53e59 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -188,7 +188,10 @@ static u16 twobyte_table[256] = {
 	/* 0x70 - 0x7F */
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	/* 0x80 - 0x8F */
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+	ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+	ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+	ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
 	/* 0x90 - 0x9F */
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	/* 0xA0 - 0xA7 */
@@ -479,6 +482,41 @@ static int read_descriptor(struct x86_emulate_ctxt *ctxt,
 	return rc;
 }
 
+static int test_cc(unsigned int condition, unsigned int flags)
+{
+	int rc = 0;
+
+	switch ((condition & 15) >> 1) {
+	case 0: /* o */
+		rc |= (flags & EFLG_OF);
+		break;
+	case 1: /* b/c/nae */
+		rc |= (flags & EFLG_CF);
+		break;
+	case 2: /* z/e */
+		rc |= (flags & EFLG_ZF);
+		break;
+	case 3: /* be/na */
+		rc |= (flags & (EFLG_CF|EFLG_ZF));
+		break;
+	case 4: /* s */
+		rc |= (flags & EFLG_SF);
+		break;
+	case 5: /* p/pe */
+		rc |= (flags & EFLG_PF);
+		break;
+	case 7: /* le/ng */
+		rc |= (flags & EFLG_ZF);
+		/* fall through */
+	case 6: /* l/nge */
+		rc |= (!(flags & EFLG_SF) != !(flags & EFLG_OF));
+		break;
+	}
+
+	/* Odd condition identifiers (lsb == 1) have inverted sense. */
+	return (!!rc ^ (condition & 1));
+}
+
 int
 x86_emulate_memop(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
 {
@@ -1486,6 +1524,27 @@ twobyte_special_insn:
 		}
 		rc = X86EMUL_CONTINUE;
 		break;
+	case 0x80 ... 0x8f: /* jnz rel, etc*/ {
+		long int rel;
+
+		switch (op_bytes) {
+		case 2:
+			rel = insn_fetch(s16, 2, _eip);
+			break;
+		case 4:
+			rel = insn_fetch(s32, 4, _eip);
+			break;
+		case 8:
+			rel = insn_fetch(s64, 8, _eip);
+			break;
+		default:
+			DPRINTF("jnz: Invalid op_bytes\n");
+			goto cannot_emulate;
+		}
+		if (test_cc(b, _eflags))
+			JMP_REL(rel);
+		break;
+	}
 	case 0xc7:		/* Grp9 (cmpxchg8b) */
 		{
 			u64 old, new;
-- 
1.5.3

-
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Messages in current thread:
[PATCH 000/104] KVM patch queue for the 2.6.24 merge window, Avi Kivity, (Mon Sep 17, 4:30 am)
git-send-email creates duplicate Message-Id's, Adrian Bunk, (Mon Sep 17, 11:59 am)
Re: git-send-email creates duplicate Message-Id's, Junio C Hamano, (Mon Sep 17, 4:22 pm)
Re: git-send-email creates duplicate Message-Id's, Matti Aarnio, (Mon Sep 17, 4:47 pm)
[PATCH 008/104] KVM: Trivial: Comment spelling may escape grep, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 011/104] KVM: Use standard CR3 flags, tighten checking, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 014/104] KVM: Set exit_reason to KVM_EXIT_MMIO where ..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 012/104] KVM: Use standard CR4 flags, tighten checking, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 015/104] KVM: Use standard CR8 flags, and fix TPR def..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 018/104] KVM: Return if the pdptrs are invalid when t..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 023/104] KVM: load_pdptrs() cleanups, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 021/104] KVM: VMX: Import some constants of vmcs from..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 016/104] KVM: x86 emulator: fix cmov for writeback ch..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 026/104] KVM: VMX: Improve the method of writing vmcs..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 029/104] KVM: Convert vm lock to a mutex, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 035/104] KVM: Change the emulator_{read,write,cmpxchg..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 043/104] KVM: SVM: Make set_msr_interception more rel..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 024/104] KVM: Remove arch specific components from th..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 044/104] KVM: Remove redundant alloc_vmcs_cpu declara..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 028/104] KVM: Use the scheduler preemption notifiers ..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 036/104] KVM: Remove kvm_{read,write}_guest(), Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 046/104] KVM: Remove stat_set from debugfs, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 031/104] KVM: VMX: pass vcpu_vmx internally, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 050/104] KVM: VMX: Remove a duplicated ia32e mode vm ..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 055/104] KVM: Communicate cr8 changes to userspace, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 057/104] KVM: x86 emulator: implement 'jmp rel' instr..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 056/104] KVM: x86 emulator: implement 'and $imm, %{al..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 059/104] KVM: x86 emulator: implement 'push reg' (opc..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 052/104] KVM: Cleanup string I/O instruction emulation, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 062/104] KVM: X86 emulator: fix 'push reg' writeback, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 074/104] KVM: pending irq save/restore, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 082/104] KVM: Set the ET flag in CR0 after initializi..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 084/104] KVM: Clean up unloved invlpg emulation, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 083/104] KVM: Remove the unused invlpg member of stru..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 081/104] KVM: enable in-kernel APIC INIT/SIPI handling, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 085/104] KVM: Keep control regs in sync, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 086/104] KVM: Hoist SVM's get_cs_db_l_bits into core ..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 091/104] KVM: Move main vcpu loop into subarch indepe..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 092/104] KVM: VMX: Fix exit qualification width on i386, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 093/104] KVM: x86 emulator: push imm8, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 094/104] KVM: x86 emulator: call near, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 095/104] KVM: x86 emulator: pushf, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 096/104] KVM: Improve emulation failure reporting, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 097/104] KVM: x86 emulator: sort opcodes into ascendi..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 103/104] KVM: x86 emulator: popf, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 099/104] KVM: X86 emulator: jump conditional short, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 102/104] KVM: x86 emulator: fix src, dst value initia..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 088/104] KVM: Rename kvm_arch_ops to kvm_x86_ops, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 098/104] KVM: x86 emulator: imlpement jump conditiona..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 100/104] KVM: x86 emulator: lea, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 101/104] KVM: x86 emulator: jmp abs, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 090/104] KVM: VMX: Move vm entry failure handling to ..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 087/104] KVM: Simplify memory allocation, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 089/104] KVM: MMU: Don't do GFP_NOWAIT allocations, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 080/104] KVM: round robin for APIC lowest priority de..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 076/104] KVM: Keep track of missed timer irq injections, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 079/104] KVM: deliver PIC interrupt only to vcpu0, Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 075/104] KVM: VMX: Use shadow TPR/cr8 for 64-bits gue..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 066/104] KVM: Emulate local APIC in kernel, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 078/104] KVM: disable tpr/cr8 sync when in-kernel API..., Avi Kivity, (Mon Sep 17, 4:32 am)
[PATCH 077/104] KVM: Migrate lapic hrtimer when vcpu moves t..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 061/104] KVM: Support more memory slots, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 063/104] KVM: VMX: Split segments reload in vmx_load_..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 060/104] KVM: VMX: allow rmode_tss_base() to work wit..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 072/104] KVM: in-kernel IOAPIC save and restore support, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 067/104] KVM: In-kernel I/O APIC model, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 073/104] KVM: in-kernel LAPIC save and restore support, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 064/104] KVM: Add support for in-kernel PIC emulation, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 070/104] KVM: Add get/set irqchip ioctls for in-kerne..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 071/104] KVM: Bypass irq_pending get/set when using i..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 068/104] KVM: Emulate hlt in the kernel, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 065/104] KVM: Define and use cr8 access functions, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 069/104] KVM: Protect in-kernel pio using kvm-&gt;lock, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 058/104] KVM: x86 emulator: Implement 'jmp rel short'..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 034/104] KVM: SVM: internal function name cleanup, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 025/104] KVM: Dynamically allocate vcpus, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 053/104] KVM: Clean up kvm_setup_pio(), Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 051/104] KVM: Remove useless assignment, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 048/104] KVM: Add and use pr_unimpl for standard form..., Avi Kivity, (Mon Sep 17, 4:31 am)
Re: [PATCH 048/104] KVM: Add and use pr_unimpl for standard ..., Joe Perches, (Mon Sep 17, 12:16 pm)
Re: [PATCH 048/104] KVM: Add and use pr_unimpl for standard ..., Rusty Russell, (Mon Sep 17, 7:08 pm)
[PATCH 049/104] KVM: Use kmem_cache_free for kmem_cache_zall..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 033/104] KVM: SVM: de-containization, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 047/104] KVM: Remove unneeded kvm_dev_open and kvm_de..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 045/104] KVM: Fix defined but not used warning in dri..., Avi Kivity, (Mon Sep 17, 4:31 am)
Re: [PATCH 045/104] KVM: Fix defined but not used warning in..., David Miller, (Mon Sep 17, 12:27 pm)
Re: [kvm-devel] [PATCH 045/104] KVM: Fix defined but not use..., Avi Kivity, (Mon Sep 17, 1:35 pm)
[PATCH 037/104] KVM: Use kmem cache for allocating vcpus, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 038/104] KVM: Use alignment properties of vcpu to sim..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 040/104] KVM: VMX: Add cpu consistency check, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 042/104] KVM: Cleanup mark_page_dirty, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 039/104] KVM: kvm_vm_ioctl_get_dirty_log restore "not..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 030/104] KVM: fx_init() needs preemption disabled whi..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 041/104] KVM: Don't assign vcpu-&gt;cr3 if it's inval..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 020/104] KVM: Move gfn_to_page out of kmap/unmap pairs, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 032/104] KVM: Remove three magic numbers, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 022/104] KVM: Remove dead code in the cmpxchg instruc..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 027/104] KVM: add hypercall nr to kvm_run, Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 019/104] KVM: Hoist kvm_mmu_reload() out of the criti..., Avi Kivity, (Mon Sep 17, 4:31 am)
[PATCH 017/104] KVM: x86 emulator: fix faulty check for two-..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 010/104] KVM: Trivial: Use standard CR0 flags macros ..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 013/104] KVM: Trivial: Use standard BITMAP macros, op..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 009/104] KVM: Trivial: Avoid hardware_disable predecl..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 006/104] KVM: Trivial: Remove unused struct cpu_user_..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 007/104] KVM: Trivial: Make decode_register() static, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 005/104] KVM: Trivial: /dev/kvm interface is no longe..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 004/104] KVM: In-kernel string pio write support, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 003/104] KVM: Future-proof the exit information union..., Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 002/104] KVM: SMP: Add vcpu_id field in struct vcpu, Avi Kivity, (Mon Sep 17, 4:30 am)
[PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 4:30 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Christoph Hellwig, (Mon Sep 17, 5:13 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 5:15 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 5:18 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Nick Piggin, (Sun Sep 16, 5:29 pm)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 2:19 pm)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Nick Piggin, (Mon Sep 17, 1:17 pm)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Tue Sep 18, 6:44 am)

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