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Tue, 30 Sep 2025 11:13:08 -0700 (PDT) Received: from [192.168.10.81] ([176.206.127.188]) by smtp.googlemail.com with ESMTPSA id a640c23a62f3a-b4691b07a77sm52359666b.2.2025.09.30.11.13.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Sep 2025 11:13:07 -0700 (PDT) Message-ID: Date: Tue, 30 Sep 2025 20:13:06 +0200 Precedence: bulk X-Mailing-List: linux-next@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: linux-next: manual merge of the kvm-x86 tree with the tip tree To: Mark Brown , Sean Christopherson Cc: Linux Kernel Mailing List , Linux Next Mailing List , Peter Zijlstra References: From: Paolo Bonzini Content-Language: en-US Autocrypt: addr=pbonzini@redhat.com; keydata= xsEhBFRCcBIBDqDGsz4K0zZun3jh+U6Z9wNGLKQ0kSFyjN38gMqU1SfP+TUNQepFHb/Gc0E2 CxXPkIBTvYY+ZPkoTh5xF9oS1jqI8iRLzouzF8yXs3QjQIZ2SfuCxSVwlV65jotcjD2FTN04 hVopm9llFijNZpVIOGUTqzM4U55sdsCcZUluWM6x4HSOdw5F5Utxfp1wOjD/v92Lrax0hjiX DResHSt48q+8FrZzY+AUbkUS+Jm34qjswdrgsC5uxeVcLkBgWLmov2kMaMROT0YmFY6A3m1S P/kXmHDXxhe23gKb3dgwxUTpENDBGcfEzrzilWueOeUWiOcWuFOed/C3SyijBx3Av/lbCsHU Vx6pMycNTdzU1BuAroB+Y3mNEuW56Yd44jlInzG2UOwt9XjjdKkJZ1g0P9dwptwLEgTEd3Fo UdhAQyRXGYO8oROiuh+RZ1lXp6AQ4ZjoyH8WLfTLf5g1EKCTc4C1sy1vQSdzIRu3rBIjAvnC tGZADei1IExLqB3uzXKzZ1BZ+Z8hnt2og9hb7H0y8diYfEk2w3R7wEr+Ehk5NQsT2MPI2QBd wEv1/Aj1DgUHZAHzG1QN9S8wNWQ6K9DqHZTBnI1hUlkp22zCSHK/6FwUCuYp1zcAEQEAAc0j UGFvbG8gQm9uemluaSA8cGJvbnppbmlAcmVkaGF0LmNvbT7CwU0EEwECACMFAlRCcBICGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRB+FRAMzTZpsbceDp9IIN6BIA0Ol7MoB15E 11kRz/ewzryFY54tQlMnd4xxfH8MTQ/mm9I482YoSwPMdcWFAKnUX6Yo30tbLiNB8hzaHeRj jx12K+ptqYbg+cevgOtbLAlL9kNgLLcsGqC2829jBCUTVeMSZDrzS97ole/YEez2qFpPnTV0 VrRWClWVfYh+JfzpXmgyhbkuwUxNFk421s4Ajp3d8nPPFUGgBG5HOxzkAm7xb1cjAuJ+oi/K CHfkuN+fLZl/u3E/fw7vvOESApLU5o0icVXeakfSz0LsygEnekDbxPnE5af/9FEkXJD5EoYG SEahaEtgNrR4qsyxyAGYgZlS70vkSSYJ+iT2rrwEiDlo31MzRo6Ba2FfHBSJ7lcYdPT7bbk9 AO3hlNMhNdUhoQv7M5HsnqZ6unvSHOKmReNaS9egAGdRN0/GPDWr9wroyJ65ZNQsHl9nXBqE AukZNr5oJO5vxrYiAuuTSd6UI/xFkjtkzltG3mw5ao2bBpk/V/YuePrJsnPFHG7NhizrxttB nTuOSCMo45pfHQ+XYd5K1+Cv/NzZFNWscm5htJ0HznY+oOsZvHTyGz3v91pn51dkRYN0otqr bQ4tlFFuVjArBZcapSIe6NV8C4cEiSTOwE0EVEJx7gEIAMeHcVzuv2bp9HlWDp6+RkZe+vtl KwAHplb/WH59j2wyG8V6i33+6MlSSJMOFnYUCCL77bucx9uImI5nX24PIlqT+zasVEEVGSRF m8dgkcJDB7Tps0IkNrUi4yof3B3shR+vMY3i3Ip0e41zKx0CvlAhMOo6otaHmcxr35sWq1Jk tLkbn3wG+fPQCVudJJECvVQ//UAthSSEklA50QtD2sBkmQ14ZryEyTHQ+E42K3j2IUmOLriF dNr9NvE1QGmGyIcbw2NIVEBOK/GWxkS5+dmxM2iD4Jdaf2nSn3jlHjEXoPwpMs0KZsgdU0pP JQzMUMwmB1wM8JxovFlPYrhNT9MAEQEAAcLBMwQYAQIACQUCVEJx7gIbDAAKCRB+FRAMzTZp sadRDqCctLmYICZu4GSnie4lKXl+HqlLanpVMOoFNnWs9oRP47MbE2wv8OaYh5pNR9VVgyhD OG0AU7oidG36OeUlrFDTfnPYYSF/mPCxHttosyt8O5kabxnIPv2URuAxDByz+iVbL+RjKaGM GDph56ZTswlx75nZVtIukqzLAQ5fa8OALSGum0cFi4ptZUOhDNz1onz61klD6z3MODi0sBZN Aj6guB2L/+2ZwElZEeRBERRd/uommlYuToAXfNRdUwrwl9gRMiA0WSyTb190zneRRDfpSK5d usXnM/O+kr3Dm+Ui+UioPf6wgbn3T0o6I5BhVhs4h4hWmIW7iNhPjX1iybXfmb1gAFfjtHfL xRUr64svXpyfJMScIQtBAm0ihWPltXkyITA92ngCmPdHa6M1hMh4RDX+Jf1fiWubzp1voAg0 JBrdmNZSQDz0iKmSrx8xkoXYfA3bgtFN8WJH2xgFL28XnqY4M6dLhJwV3z08tPSRqYFm4NMP dRsn0/7oymhneL8RthIvjDDQ5ktUjMe8LtHr70OZE/TT88qvEdhiIVUogHdo4qBrk41+gGQh b906Dudw5YhTJFU3nC6bbF2nrLlB4C/XSiH76ZvqzV0Z/cAMBo5NF/w= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/22/25 11:50, Mark Brown wrote: > Hi all, > > Today's linux-next merge of the kvm-x86 tree got a conflict in: > > arch/x86/kvm/emulate.c > > between commit: > > 6204aea36b74c ("KVM: x86: Introduce EM_ASM_1") > > from the tip tree and commit: > > f8457615b71c6 ("KVM: x86: Don't emulate instructions affected by CET features") > > from the kvm-x86 tree. > > I fixed it up (see below) and can carry the fix as necessary. This > is now fixed as far as linux-next is concerned, but any non trivial > conflicts should be mentioned to your upstream maintainer when your tree > is submitted for merging. You may also want to consider cooperating > with the maintainer of the conflicting tree to minimise any particularly > complex conflicts. This will soon become a conflict between kvm and tip. Paolo > diff --cc arch/x86/kvm/emulate.c > index 796d0c64f9baf,5c5fb6a6f7f92..0000000000000 > --- a/arch/x86/kvm/emulate.c > +++ b/arch/x86/kvm/emulate.c > @@@ -4001,11 -4153,11 +4088,11 @@@ static const struct opcode group4[] = > }; > > static const struct opcode group5[] = { > - F(DstMem | SrcNone | Lock, em_inc), > - F(DstMem | SrcNone | Lock, em_dec), > + I(DstMem | SrcNone | Lock, em_inc), > + I(DstMem | SrcNone | Lock, em_dec), > - I(SrcMem | NearBranch | IsBranch, em_call_near_abs), > - I(SrcMemFAddr | ImplicitOps | IsBranch, em_call_far), > + I(SrcMem | NearBranch | IsBranch | ShadowStack, em_call_near_abs), > + I(SrcMemFAddr | ImplicitOps | IsBranch | ShadowStack, em_call_far), > - I(SrcMem | NearBranch | IsBranch, em_jmp_abs), > + I(SrcMem | NearBranch | IsBranch, em_jmp_abs), > I(SrcMemFAddr | ImplicitOps | IsBranch, em_jmp_far), > I(SrcMem | Stack | TwoMemOp, em_push), D(Undefined), > }; > diff --cc arch/x86/include/asm/cpufeatures.h > index b2a562217d3ff,8738bd783de22..0000000000000 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@@ -495,8 -496,7 +496,9 @@@ > #define X86_FEATURE_TSA_SQ_NO (21*32+11) /* AMD CPU not vulnerable to TSA-SQ */ > #define X86_FEATURE_TSA_L1_NO (21*32+12) /* AMD CPU not vulnerable to TSA-L1 */ > #define X86_FEATURE_CLEAR_CPU_BUF_VM (21*32+13) /* Clear CPU buffers using VERW before VMRUN */ > -#define X86_FEATURE_MSR_IMM (21*32+14) /* MSR immediate form instructions */ > +#define X86_FEATURE_IBPB_EXIT_TO_USER (21*32+14) /* Use IBPB on exit-to-userspace, see VMSCAPE bug */ > +#define X86_FEATURE_ABMC (21*32+15) /* Assignable Bandwidth Monitoring Counters */ > ++#define X86_FEATURE_MSR_IMM (21*32+16) /* MSR immediate form instructions */ > > /* > * BUG word(s) > diff --cc arch/x86/include/asm/msr-index.h > index 718a55d82fe45,717baeba6db3c..0000000000000 > --- a/arch/x86/include/asm/msr-index.h > +++ b/arch/x86/include/asm/msr-index.h > @@@ -315,14 -315,15 +315,16 @@@ > #define PERF_CAP_PT_IDX 16 > > #define MSR_PEBS_LD_LAT_THRESHOLD 0x000003f6 > - > + #define PERF_CAP_LBR_FMT 0x3f > #define PERF_CAP_PEBS_TRAP BIT_ULL(6) > #define PERF_CAP_ARCH_REG BIT_ULL(7) > #define PERF_CAP_PEBS_FORMAT 0xf00 > + #define PERF_CAP_FW_WRITES BIT_ULL(13) > #define PERF_CAP_PEBS_BASELINE BIT_ULL(14) > +#define PERF_CAP_PEBS_TIMING_INFO BIT_ULL(17) > #define PERF_CAP_PEBS_MASK (PERF_CAP_PEBS_TRAP | PERF_CAP_ARCH_REG | \ > - PERF_CAP_PEBS_FORMAT | PERF_CAP_PEBS_BASELINE) > + PERF_CAP_PEBS_FORMAT | PERF_CAP_PEBS_BASELINE | \ > + PERF_CAP_PEBS_TIMING_INFO) > > #define MSR_IA32_RTIT_CTL 0x00000570 > #define RTIT_CTL_TRACEEN BIT(0) > diff --cc arch/x86/kvm/emulate.c > index 796d0c64f9baf,5c5fb6a6f7f92..0000000000000 > --- a/arch/x86/kvm/emulate.c > +++ b/arch/x86/kvm/emulate.c > @@@ -4001,11 -4153,11 +4088,11 @@@ static const struct opcode group4[] = > }; > > static const struct opcode group5[] = { > F(DstMem | SrcNone | Lock, em_inc), > F(DstMem | SrcNone | Lock, em_dec), > - I(SrcMem | NearBranch | IsBranch, em_call_near_abs), > - I(SrcMemFAddr | ImplicitOps | IsBranch, em_call_far), > + I(SrcMem | NearBranch | IsBranch | ShadowStack, em_call_near_abs), > + I(SrcMemFAddr | ImplicitOps | IsBranch | ShadowStack, em_call_far), > - I(SrcMem | NearBranch | IsBranch, em_jmp_abs), > + I(SrcMem | NearBranch | IsBranch, em_jmp_abs), > I(SrcMemFAddr | ImplicitOps | IsBranch, em_jmp_far), > I(SrcMem | Stack | TwoMemOp, em_push), D(Undefined), > };