* [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed [not found] <cover.1658913543.git.houwenlong.hwl@antgroup.com> @ 2022-07-28 8:25 ` Hou Wenlong 2022-08-30 18:44 ` Sean Christopherson 2022-07-28 8:25 ` [PATCH 2/2] KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path Hou Wenlong 1 sibling, 1 reply; 5+ messages in thread From: Hou Wenlong @ 2022-07-28 8:25 UTC (permalink / raw) To: kvm Cc: Paolo Bonzini, Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, linux-kernel The return value of emulator_{get|set}_mst_with_filter() is confused, since msr access error and emulator error are mixed. Although, KVM_MSR_RET_* doesn't conflict with X86EMUL_IO_NEEDED at present, it is better to convert msr access error to emulator error if error value is needed. Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> --- arch/x86/kvm/x86.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 5366f884e9a7..8df89b9c212f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7908,11 +7908,12 @@ static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, int r; r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); - - if (r && kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, - complete_emulated_rdmsr, r)) { - /* Bounce to user space */ - return X86EMUL_IO_NEEDED; + if (r) { + if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, + complete_emulated_rdmsr, r)) + r = X86EMUL_IO_NEEDED; + else + r = X86EMUL_UNHANDLEABLE; } return r; @@ -7925,11 +7926,12 @@ static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, int r; r = kvm_set_msr_with_filter(vcpu, msr_index, data); - - if (r && kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, - complete_emulated_msr_access, r)) { - /* Bounce to user space */ - return X86EMUL_IO_NEEDED; + if (r > 0) { + if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, + complete_emulated_msr_access, r)) + r = X86EMUL_IO_NEEDED; + else + r = X86EMUL_UNHANDLEABLE; } return r; -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed 2022-07-28 8:25 ` [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed Hou Wenlong @ 2022-08-30 18:44 ` Sean Christopherson 2022-08-31 3:17 ` Hou Wenlong 0 siblings, 1 reply; 5+ messages in thread From: Sean Christopherson @ 2022-08-30 18:44 UTC (permalink / raw) To: Hou Wenlong Cc: kvm, Paolo Bonzini, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, linux-kernel On Thu, Jul 28, 2022, Hou Wenlong wrote: > The return value of emulator_{get|set}_mst_with_filter() > is confused, since msr access error and emulator error > are mixed. Although, KVM_MSR_RET_* doesn't conflict with > X86EMUL_IO_NEEDED at present, it is better to convert > msr access error to emulator error if error value is > needed. > > Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> > --- > arch/x86/kvm/x86.c | 22 ++++++++++++---------- > 1 file changed, 12 insertions(+), 10 deletions(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 5366f884e9a7..8df89b9c212f 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -7908,11 +7908,12 @@ static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, > int r; > > r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); > - > - if (r && kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > - complete_emulated_rdmsr, r)) { > - /* Bounce to user space */ > - return X86EMUL_IO_NEEDED; > + if (r) { > + if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > + complete_emulated_rdmsr, r)) > + r = X86EMUL_IO_NEEDED; > + else > + r = X86EMUL_UNHANDLEABLE; This should be X86EMUL_PROPAGATE_FAULT, X86EMUL_UNHANDLEABLE is used to indicate that KVM needs to bail all the way to userspace. I definitely like the idea of converting to X86EMUL_* here instead of spreading it across these helpers and the emulator, but in that case should convert _all_ types. And I think it makes sense to opportunistically handle "r < 0" in the get helper. KVM may not return -errno today, but assuming that will always hold true is unnecessarily risking. E.g. what about: static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, complete_emulated_rdmsr, r)) return X86EMUL_IO_NEEDED; else return X86EMUL_PROPAGATE_FAULT; } return X86EMUL_CONTINUE; } static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_set_msr_with_filter(vcpu, msr_index, data); if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, complete_emulated_msr_access, r)) return X86EMUL_IO_NEEDED; else return X86EMUL_PROPAGATE_FAULT; } return X86EMUL_CONTINUE; } Or maybe even add a helper to do the translation? Can't tell if this is a net positive or not. It's a bit gratuitous, but it does ensure consistent behavior for RDMSR vs. WRMSR. static int emulator_handle_msr_return(struct kvm_vcpu *vcpu *, int r, u32 msr, u64 data, u32 exit_reason, int (*comp)(struct kvm_vcpu *vcpu)) { if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr, exit_reason, data, comp, r)) return X86EMUL_IO_NEEDED; else return X86EMUL_UNHANDLEABLE; } return X86EMUL_CONTINUE; } static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); return emulator_handle_msr_return(vcpu, r, msr_index, 0, KVM_EXIT_X86_RDMSR, complete_emulated_rdmsr); } static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_set_msr_with_filter(vcpu, msr_index, data); return emulator_handle_msr_return(vcpu, r, msr_index, data, KVM_EXIT_X86_WRMSR, complete_emulated_msr_access); } And then the emulator side of things can be: static int em_wrmsr(struct x86_emulate_ctxt *ctxt) { u64 msr_index = reg_read(ctxt, VCPU_REGS_RCX); u64 msr_data; int r; msr_data = (u32)reg_read(ctxt, VCPU_REGS_RAX) | ((u64)reg_read(ctxt, VCPU_REGS_RDX) << 32); r = ctxt->ops->set_msr_with_filter(ctxt, msr_index, msr_data); if (r == X86EMUL_PROPAGATE_FAULT) return emulate_gp(ctxt, 0); return r; } static int em_rdmsr(struct x86_emulate_ctxt *ctxt) { u64 msr_index = reg_read(ctxt, VCPU_REGS_RCX); u64 msr_data; int r; r = ctxt->ops->get_msr_with_filter(ctxt, msr_index, &msr_data); if (r == X86EMUL_PROPAGATE_FAULT) return emulate_gp(ctxt, 0); if (r == X86EMUL_CONTINUE) { *reg_write(ctxt, VCPU_REGS_RAX) = (u32)msr_data; *reg_write(ctxt, VCPU_REGS_RDX) = msr_data >> 32; } return r; } ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed 2022-08-30 18:44 ` Sean Christopherson @ 2022-08-31 3:17 ` Hou Wenlong 0 siblings, 0 replies; 5+ messages in thread From: Hou Wenlong @ 2022-08-31 3:17 UTC (permalink / raw) To: Sean Christopherson Cc: kvm, Paolo Bonzini, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, linux-kernel On Wed, Aug 31, 2022 at 02:44:08AM +0800, Sean Christopherson wrote: > On Thu, Jul 28, 2022, Hou Wenlong wrote: > > The return value of emulator_{get|set}_mst_with_filter() > > is confused, since msr access error and emulator error > > are mixed. Although, KVM_MSR_RET_* doesn't conflict with > > X86EMUL_IO_NEEDED at present, it is better to convert > > msr access error to emulator error if error value is > > needed. > > > > Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> > > --- > > arch/x86/kvm/x86.c | 22 ++++++++++++---------- > > 1 file changed, 12 insertions(+), 10 deletions(-) > > > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > > index 5366f884e9a7..8df89b9c212f 100644 > > --- a/arch/x86/kvm/x86.c > > +++ b/arch/x86/kvm/x86.c > > @@ -7908,11 +7908,12 @@ static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, > > int r; > > > > r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); > > - > > - if (r && kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > > - complete_emulated_rdmsr, r)) { > > - /* Bounce to user space */ > > - return X86EMUL_IO_NEEDED; > > + if (r) { > > + if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > > + complete_emulated_rdmsr, r)) > > + r = X86EMUL_IO_NEEDED; > > + else > > + r = X86EMUL_UNHANDLEABLE; > > This should be X86EMUL_PROPAGATE_FAULT, X86EMUL_UNHANDLEABLE is used to indicate > that KVM needs to bail all the way to userspace. > > I definitely like the idea of converting to X86EMUL_* here instead of spreading > it across these helpers and the emulator, but in that case should convert _all_ > types. > > And I think it makes sense to opportunistically handle "r < 0" in the get helper. > KVM may not return -errno today, but assuming that will always hold true is > unnecessarily risking. I agree. The original commit 7dffecaf4eab wanted to report negative values to userspace, but the emulator actually didn't propagate -errno to the caller. So handling "r < 0" in the set helper is better, then only X86EMUL_* is returned. > > E.g. what about: > > > static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, > u32 msr_index, u64 *pdata) > { > struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); > int r; > > r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); > if (r < 0) > return X86EMUL_UNHANDLEABLE; > > if (r) { > if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > complete_emulated_rdmsr, r)) > return X86EMUL_IO_NEEDED; > else > return X86EMUL_PROPAGATE_FAULT; > } > > return X86EMUL_CONTINUE; > } > > static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, > u32 msr_index, u64 data) > { > struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); > int r; > > r = kvm_set_msr_with_filter(vcpu, msr_index, data); > if (r < 0) > return X86EMUL_UNHANDLEABLE; > > if (r) { > if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, > complete_emulated_msr_access, r)) > return X86EMUL_IO_NEEDED; > else > return X86EMUL_PROPAGATE_FAULT; > } > > return X86EMUL_CONTINUE; > } > I'll take this in the v2. Thanks. > > Or maybe even add a helper to do the translation? Can't tell if this is a net > positive or not. It's a bit gratuitous, but it does ensure consistent behavior > for RDMSR vs. WRMSR. > > static int emulator_handle_msr_return(struct kvm_vcpu *vcpu *, int r, > u32 msr, u64 data, u32 exit_reason, > int (*comp)(struct kvm_vcpu *vcpu)) > { > if (r < 0) > return X86EMUL_UNHANDLEABLE; > > if (r) { > if (kvm_msr_user_space(vcpu, msr, exit_reason, data, comp, r)) > return X86EMUL_IO_NEEDED; > else > return X86EMUL_UNHANDLEABLE; > } > > return X86EMUL_CONTINUE; > } > > static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, > u32 msr_index, u64 *pdata) > { > struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); > int r; > > r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); > return emulator_handle_msr_return(vcpu, r, msr_index, 0, > KVM_EXIT_X86_RDMSR, > complete_emulated_rdmsr); > } > > static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, > u32 msr_index, u64 data) > { > struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); > int r; > > r = kvm_set_msr_with_filter(vcpu, msr_index, data); > return emulator_handle_msr_return(vcpu, r, msr_index, data, > KVM_EXIT_X86_WRMSR, > complete_emulated_msr_access); > } > > > And then the emulator side of things can be: > > static int em_wrmsr(struct x86_emulate_ctxt *ctxt) > { > u64 msr_index = reg_read(ctxt, VCPU_REGS_RCX); > u64 msr_data; > int r; > > msr_data = (u32)reg_read(ctxt, VCPU_REGS_RAX) > | ((u64)reg_read(ctxt, VCPU_REGS_RDX) << 32); > r = ctxt->ops->set_msr_with_filter(ctxt, msr_index, msr_data); > > if (r == X86EMUL_PROPAGATE_FAULT) > return emulate_gp(ctxt, 0); > > return r; > } > > static int em_rdmsr(struct x86_emulate_ctxt *ctxt) > { > u64 msr_index = reg_read(ctxt, VCPU_REGS_RCX); > u64 msr_data; > int r; > > r = ctxt->ops->get_msr_with_filter(ctxt, msr_index, &msr_data); > > if (r == X86EMUL_PROPAGATE_FAULT) > return emulate_gp(ctxt, 0); > > if (r == X86EMUL_CONTINUE) { > *reg_write(ctxt, VCPU_REGS_RAX) = (u32)msr_data; > *reg_write(ctxt, VCPU_REGS_RDX) = msr_data >> 32; > } > return r; > } ^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 2/2] KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path [not found] <cover.1658913543.git.houwenlong.hwl@antgroup.com> 2022-07-28 8:25 ` [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed Hou Wenlong @ 2022-07-28 8:25 ` Hou Wenlong 2022-08-30 19:05 ` Sean Christopherson 1 sibling, 1 reply; 5+ messages in thread From: Hou Wenlong @ 2022-07-28 8:25 UTC (permalink / raw) To: kvm Cc: Paolo Bonzini, Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, linux-kernel Since the RDMSR/WRMSR emulation uses a sepearte emualtor interface, the trace points for RDMSR/WRMSR can be added in emulator path like normal path. Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> --- arch/x86/kvm/x86.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 8df89b9c212f..6e45b20ce9a4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7908,12 +7908,16 @@ static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, int r; r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); - if (r) { + if (!r) { + trace_kvm_msr_read(msr_index, *pdata); + } else { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, - complete_emulated_rdmsr, r)) + complete_emulated_rdmsr, r)) { r = X86EMUL_IO_NEEDED; - else + } else { + trace_kvm_msr_read_ex(msr_index); r = X86EMUL_UNHANDLEABLE; + } } return r; @@ -7926,12 +7930,16 @@ static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, int r; r = kvm_set_msr_with_filter(vcpu, msr_index, data); - if (r > 0) { + if (!r) { + trace_kvm_msr_write(msr_index, data); + } else if (r > 0) { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, - complete_emulated_msr_access, r)) + complete_emulated_msr_access, r)) { r = X86EMUL_IO_NEEDED; - else + } else { + trace_kvm_msr_write_ex(msr_index, data); r = X86EMUL_UNHANDLEABLE; + } } return r; -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 2/2] KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path 2022-07-28 8:25 ` [PATCH 2/2] KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path Hou Wenlong @ 2022-08-30 19:05 ` Sean Christopherson 0 siblings, 0 replies; 5+ messages in thread From: Sean Christopherson @ 2022-08-30 19:05 UTC (permalink / raw) To: Hou Wenlong Cc: kvm, Paolo Bonzini, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, linux-kernel On Thu, Jul 28, 2022, Hou Wenlong wrote: > Since the RDMSR/WRMSR emulation uses a sepearte emualtor interface, > the trace points for RDMSR/WRMSR can be added in emulator path like > normal path. > > Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> > --- > arch/x86/kvm/x86.c | 20 ++++++++++++++------ > 1 file changed, 14 insertions(+), 6 deletions(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 8df89b9c212f..6e45b20ce9a4 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -7908,12 +7908,16 @@ static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, > int r; > > r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); > - if (r) { > + if (!r) { > + trace_kvm_msr_read(msr_index, *pdata); > + } else { > if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, > - complete_emulated_rdmsr, r)) > + complete_emulated_rdmsr, r)) { > r = X86EMUL_IO_NEEDED; > - else > + } else { > + trace_kvm_msr_read_ex(msr_index); Drat, I suspected this patch would make adding a helper a mess. We could use trace_kvm_msr() directly, using @exit_reason to select between "rdmsr" and "wrmsr", but I think the end result is less readable and not worth the small amount of deduplication. E.g. this is rather hard to read. if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr, exit_reason, data, comp, r)) return X86EMUL_IO_NEEDED; trace_kvm_msr(exit_reason == KVM_EXIT_X86_WRMSR, msr, data, true); return X86EMUL_PROPAGATE_FAULT; } trace_kvm_msr(exit_reason == KVM_EXIT_X86_WRMSR, msr, data, false); return X86EMUL_CONTINUE; Aha! If there "error" paths return directly, then the "else" paths go away and this is all (IMO) a bit cleaner. And the diff for this patch should be much smaller since there won't be any curly brace changes. How about this for a final product? static int emulator_get_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_get_msr_with_filter(vcpu, msr_index, pdata); if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_RDMSR, 0, complete_emulated_rdmsr, r)) return X86EMUL_IO_NEEDED; trace_kvm_msr_read_ex(msr_index); return X86EMUL_PROPAGATE_FAULT; } trace_kvm_msr_read(msr_index, *pdata); return X86EMUL_CONTINUE; } static int emulator_set_msr_with_filter(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); int r; r = kvm_set_msr_with_filter(vcpu, msr_index, data); if (r < 0) return X86EMUL_UNHANDLEABLE; if (r) { if (kvm_msr_user_space(vcpu, msr_index, KVM_EXIT_X86_WRMSR, data, complete_emulated_msr_access, r)) return X86EMUL_IO_NEEDED; trace_kvm_msr_write_ex(msr_index, data); return X86EMUL_PROPAGATE_FAULT; } trace_kvm_msr_write(msr_index, data); return X86EMUL_CONTINUE; } ^ permalink raw reply [flat|nested] 5+ messages in thread
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[not found] <cover.1658913543.git.houwenlong.hwl@antgroup.com>
2022-07-28 8:25 ` [PATCH 1/2] KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed Hou Wenlong
2022-08-30 18:44 ` Sean Christopherson
2022-08-31 3:17 ` Hou Wenlong
2022-07-28 8:25 ` [PATCH 2/2] KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path Hou Wenlong
2022-08-30 19:05 ` Sean Christopherson
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