search for: x86_emulate_ctxt

...| 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 34431cf31f74..9d38f892beea 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1177,6 +1177,27 @@ static int em_fnstsw(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static u8 simd_prefix_to_bytes(const struct x86_emulate_ctxt *ctxt, + int simd_prefix) +{ + u8 bytes; + + switch (ctxt->b) { + case 0x11: + /* movsd xmm, m64 */ + /* movups xmm, m128 */ + if (simd_prefix == 0xf2) { + bytes = 8; + break; +...

Hi Keir: I am sorry trouble you again. I want to emulate instruction "push %ebp" in Xen. I found the function emulate_privilege_op does not satisfy this requirement. Then I resort to x86_emulate. I construct the x86_emulate_ctxt and reuse the "ptwr_emulate_ops". code like this: extern const struct x86_emulate_ops ptwr_emulate_ops; in do_general_protection { .... struct x86_emulate_ctxt ctxt; ctxt.regs = regs; ctxt.force_writeback = 1; // 0 is the same ctxt.addr_size = 32; ctxt.sp_size = 32; ret = x86_emu...

...tect_page(vcpu->kvm, gpa_to_gfn(gpa)); > + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > > /* > * If the access faults on its page table, it can not > @@ -6374,6 +6376,9 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt, > if (!vcpu->arch.mmu->direct_map) > gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); > > + if (kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > + return false; > + > kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > > return true;

...ruction. */ - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); /* * If the access faults on its page table, it can not @@ -6374,6 +6376,9 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt, if (!vcpu->arch.mmu->direct_map) gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); + if (kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) + return false; + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); return true;

...com> --- arch/x86/kvm/x86.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d0104adf7906..fee24bb5fa52 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7467,11 +7467,15 @@ static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); char instruction[3]; unsigned long rip = kvm_rip_read(vcpu); + int err; kvm_x86_ops->patch_hypercall(vcpu, instruction); - return emulator_write_emulated(ctxt, rip, instruction, 3, + err = emulator_write_emulated(ctxt, rip, instructi...

...com> --- arch/x86/kvm/x86.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e973ffe04d54..23bce3ef26d8 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7714,11 +7714,15 @@ static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); char instruction[3]; unsigned long rip = kvm_rip_read(vcpu); + int err; kvm_x86_ops.patch_hypercall(vcpu, instruction); - return emulator_write_emulated(ctxt, rip, instruction, 3, + err = emulator_write_emulated(ctxt, rip, instruction,...

.../kvm/x86.c index 04b1d2916a0a..965c4f0108eb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7363,16 +7363,33 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); +#define KVM_HYPERCALL_INSN_LEN 3 + static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) { + int err; struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); - char instruction[3]; + char buf[KVM_HYPERCALL_INSN_LEN]; + char instruction[KVM_HYPERCALL_INSN_LEN]; unsigned long rip = kvm_rip_read(vcpu); + err = emulator_read_emulated(ctxt, rip, buf, sizeof(buf), + &ctxt->e...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

...val, return X86EMUL_PROPAGATE_FAULT; } - if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) + if (!ret && ops->read_write_emulate(vcpu, gpa, addr, val, bytes)) return X86EMUL_CONTINUE; /* @@ -5827,7 +5827,7 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, if (!exchanged) return X86EMUL_CMPXCHG_FAILED; - kvm_page_track_write(vcpu, gpa, new, bytes); + kvm_page_track_write(vcpu, gpa, addr, new, bytes); return X86EMUL_CONTINUE; diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 04a5a0d90823..59e2f7...

...dr), old, new); + + if ( prev != old ) + rc = X86EMUL_CMPXCHG_FAILED; + + emulate_unmap_dest(v, addr, 8, sh_ctxt); + + return rc; +} +#endif + static int hvmemul_cmpxchg( enum x86_segment seg, unsigned long offset, @@ -528,8 +705,32 @@ unsigned int bytes, struct x86_emulate_ctxt *ctxt) { - /* Fix this in case the guest is really relying on r-m-w atomicity. */ - return hvmemul_write(seg, offset, p_new, bytes, ctxt); + struct hvm_emulate_ctxt *hvmemul_ctxt = + container_of(ctxt, struct hvm_emulate_ctxt, ctxt); + struct vcpu *v = current; + unsigned lon...

...cmpxchg2_emulated need support 8-byte accesses. On x86/64 systems only + * cmpxchg2_emulated need support 16-byte accesses. * 3. The emulator cannot handle 64-bit mode emulation on an x86/32 system. */ struct x86_emulate_ops @@ -165,16 +166,17 @@ struct x86_emulate_ops struct x86_emulate_ctxt *ctxt); /* - * cmpxchg8b: Emulate an atomic (LOCKed) CMPXCHG8B operation. + * cmpxchg2: Emulate an atomic (LOCKed) CMPXCHG{8,16}B operation. * @old: [IN ] Value expected to be current at @addr. * @new: [IN ] Value to write to @addr. * NOTES: - * 1. This f...

I ran a bisect to find out when Windows XP 32 bit becomes unusably slow. And I found the changeset that caused it. ========== The problem: ========== Windows 8 64 bit and 32 bit run fast and fine in the newest xen versions. Windows XP 32 bit runs unusably slow in anything new that I built from xen-unstable, but runs fast in 4.1.2 and 4.1.3 stable. While it is running slow, "xm top" or

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place