- 24 10月, 2010 7 次提交
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由 Avi Kivity 提交于
Since modrm operand can be either register or memory, decoding it into a 'struct operand', which can represent both, is simpler. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Unused (and has never been). Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Currently we use a void pointer for memory addresses. That's wrong since these are guest virtual addresses which are not directly dereferencable by the host. Use the correct type, unsigned long. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Let it compute modrm_seg instead, and have the caller apply it. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Do not recheck io permission on every iteration. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of looking up the opcode twice (once for decode flags, once for the big execution switch) look up both flags and function in the decode tables. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
It doesn't ever change, so we don't need to pass it around everywhere. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 09 9月, 2010 1 次提交
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由 Avi Kivity 提交于
operand::val and operand::orig_val are 32-bit on i386, whereas cmpxchg8b operands are 64-bit. Fix by adding val64 and orig_val64 union members to struct operand, and using them where needed. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 01 8月, 2010 11 次提交
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由 Gleb Natapov 提交于
Return exception as a result of instruction emulation and handle injection in KVM code. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Removes the need for set_flags() callback. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Return error to x86 emulator instead of injection exception behind its back. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Currently emulator returns -1 when emulation failed or IO is needed. Caller tries to guess whether emulation failed by looking at other variables. Make it easier for caller to recognise error condition by always returning -1 in case of failure. For this new emulator internal return value X86EMUL_IO_NEEDED is introduced. It is used to distinguish between error condition (which returns X86EMUL_UNHANDLEABLE) and condition that requires IO exit to userspace to continue emulation. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Currently X86EMUL_PROPAGATE_FAULT, X86EMUL_RETRY_INSTR and X86EMUL_CMPXCHG_FAILED have the same value so caller cannot distinguish why function such as emulator_cmpxchg_emulated() (which can return both X86EMUL_PROPAGATE_FAULT and X86EMUL_CMPXCHG_FAILED) failed. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Make set_cr() callback return error if it fails instead of injecting #GP behind emulator's back. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
On VMX it is expensive to call get_cached_descriptor() just to get segment base since multiple vmcs_reads are done instead of only one. Introduce new call back get_cached_segment_base() for efficiency. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Add (set|get)_msr callbacks to x86_emulate_ops instead of calling them directly. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Add (set|get)_dr callbacks to x86_emulate_ops instead of calling them directly. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
ljmp/lcall instruction operand contains address and segment. It can be 10 bytes long. Currently we decode it as two different operands. Fix it by introducing new kind of operand that can hold entire far address. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Introduce read cache which is needed for instruction that require more then one exit to userspace. After returning from userspace the instruction will be re-executed with cached read value. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 17 5月, 2010 10 次提交
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由 Jan Kiszka 提交于
When a fault triggers a task switch, the error code, if existent, has to be pushed on the new task's stack. Implement the missing bits. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Make sure that rflags is committed only after successful instruction emulation. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
To optimize "rep ins" instruction do IO in big chunks ahead of time instead of doing it only when required during instruction emulation. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Currently when string instruction is only partially complete we go back to a guest mode, guest tries to reexecute instruction and exits again and at this point emulation continues. Avoid all of this by restarting instruction without going back to a guest mode, but return to a guest mode each 1024 iterations to allow interrupt injection. Pending exception causes immediate guest entry too. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
in/out emulation is broken now. The breakage is different depending on where IO device resides. If it is in userspace emulator reports emulation failure since it incorrectly interprets kvm_emulate_pio() return value. If IO device is in the kernel emulation of 'in' will do nothing since kvm_emulate_pio() stores result directly into vcpu registers, so emulator will overwrite result of emulation during commit of shadowed register. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Implement emulation of 16/32 bit task switch in emulator.c Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Provide get_cached_descriptor(), set_cached_descriptor(), get_segment_selector(), set_segment_selector(), get_gdt(), write_std() callbacks. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Eliminate the need to call back into KVM to get it from emulator. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Use this callback instead of directly call kvm function. Also rename realmode_(set|get)_cr to emulator_(set|get)_cr since function has nothing to do with real mode. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 25 4月, 2010 1 次提交
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由 Jan Kiszka 提交于
The interrupt shadow created by STI or MOV-SS-like operations is part of the VCPU state and must be preserved across migration. Transfer it in the spare padding field of kvm_vcpu_events.interrupt. As a side effect we now have to make vmx_set_interrupt_shadow robust against both shadow types being set. Give MOV SS a higher priority and skip STI in that case to avoid that VMX throws a fault on next entry. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 01 3月, 2010 3 次提交
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由 Gleb Natapov 提交于
Currently when x86 emulator needs to access memory, page walk is done with broadest permission possible, so if emulated instruction was executed by userspace process it can still access kernel memory. Fix that by providing correct memory access to page walker during emulation. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
For some instructions CPU behaves differently for real-mode and virtual 8086. Let emulator know which mode cpu is in, so it will not poke into vcpu state directly. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Takuya Yoshikawa 提交于
The explanation of write_emulated is confused with that of read_emulated. This patch fix it. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 03 12月, 2009 1 次提交
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由 Avi Kivity 提交于
While we are never normally passed an instruction that exceeds 15 bytes, smp games can cause us to attempt to interpret one, which will cause large latencies in non-preempt hosts. Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 10 9月, 2009 1 次提交
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由 Avi Kivity 提交于
We're in arch/x86, what could we possibly be emulating? Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 10 6月, 2009 2 次提交
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由 Glauber Costa 提交于
We currently unblock shadow interrupt state when we skip an instruction, but failing to do so when we actually emulate one. This blocks interrupts in key instruction blocks, in particular sti; hlt; sequences If the instruction emulated is an sti, we have to block shadow interrupts. The same goes for mov ss. pop ss also needs it, but we don't currently emulate it. Without this patch, I cannot boot gpxe option roms at vmx machines. This is described at https://bugzilla.redhat.com/show_bug.cgi?id=494469Signed-off-by: NGlauber Costa <glommer@redhat.com> CC: H. Peter Anvin <hpa@zytor.com> CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Glauber Costa 提交于
This patch replaces drop_interrupt_shadow with the more general set_interrupt_shadow, that can either drop or raise it, depending on its parameter. It also adds ->get_interrupt_shadow() for future use. Signed-off-by: NGlauber Costa <glommer@redhat.com> CC: H. Peter Anvin <hpa@zytor.com> CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 31 12月, 2008 2 次提交
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由 Guillaume Thouvenin 提交于
Instruction like shld has three operands, so we need to add a Src2 decode set. We start with Src2None, Src2CL, and Src2ImmByte, Src2One to support shld/shrd and we will expand it later. Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
Remove one left improper comment of removed CR2. Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 23 10月, 2008 1 次提交
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由 H. Peter Anvin 提交于
Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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