| Message ID | 20211227081515.2088920-4-chao.gao@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Improve KVM's interaction with CPU hotplug | expand |
On Mon, Dec 27, 2021, Chao Gao wrote:
> No arch implementation uses this opaque now.
Except for the RISC-V part, this can be a pure revert of commit b99040853738 ("KVM:
Pass kvm_init()'s opaque param to additional arch funcs"). I think it makes sense
to process it as a revert, with a short blurb in the changelog to note that RISC-V
is manually modified as RISC-V support came along in the interim.
On Mon, Jan 10, 2022 at 11:06:44PM +0000, Sean Christopherson wrote: >On Mon, Dec 27, 2021, Chao Gao wrote: >> No arch implementation uses this opaque now. > >Except for the RISC-V part, this can be a pure revert of commit b99040853738 ("KVM: >Pass kvm_init()'s opaque param to additional arch funcs"). I think it makes sense >to process it as a revert, with a short blurb in the changelog to note that RISC-V >is manually modified as RISC-V support came along in the interim. commit b99040853738 adds opaque param to kvm_arch_hardware_setup(), which isn't reverted in this patch. I.e., this patch is a partial revert of b99040853738 plus manual changes to RISC-V. Given that, "process it as a revert" means clearly say in changelog that this commit contains a partial revert of commit b99040853738 ("KVM: Pass kvm_init()'s opaque param to additional arch funcs"). Right?
On Tue, Jan 11, 2022, Chao Gao wrote: > On Mon, Jan 10, 2022 at 11:06:44PM +0000, Sean Christopherson wrote: > >On Mon, Dec 27, 2021, Chao Gao wrote: > >> No arch implementation uses this opaque now. > > > >Except for the RISC-V part, this can be a pure revert of commit b99040853738 ("KVM: > >Pass kvm_init()'s opaque param to additional arch funcs"). I think it makes sense > >to process it as a revert, with a short blurb in the changelog to note that RISC-V > >is manually modified as RISC-V support came along in the interim. > > commit b99040853738 adds opaque param to kvm_arch_hardware_setup(), which isn't > reverted in this patch. I.e., this patch is a partial revert of b99040853738 > plus manual changes to RISC-V. Given that, "process it as a revert" means > clearly say in changelog that this commit contains a partial revert of commit > b99040853738 ("KVM: Pass kvm_init()'s opaque param to additional arch funcs"). > > Right? What I meant is literally do git revert -s b99040853738 and then manually handle RISC-V.
On Wed, Jan 12, 2022, Sean Christopherson wrote: > On Tue, Jan 11, 2022, Chao Gao wrote: > > On Mon, Jan 10, 2022 at 11:06:44PM +0000, Sean Christopherson wrote: > > >On Mon, Dec 27, 2021, Chao Gao wrote: > > >> No arch implementation uses this opaque now. > > > > > >Except for the RISC-V part, this can be a pure revert of commit b99040853738 ("KVM: > > >Pass kvm_init()'s opaque param to additional arch funcs"). I think it makes sense > > >to process it as a revert, with a short blurb in the changelog to note that RISC-V > > >is manually modified as RISC-V support came along in the interim. > > > > commit b99040853738 adds opaque param to kvm_arch_hardware_setup(), which isn't > > reverted in this patch. I.e., this patch is a partial revert of b99040853738 > > plus manual changes to RISC-V. Given that, "process it as a revert" means > > clearly say in changelog that this commit contains a partial revert of commit > > b99040853738 ("KVM: Pass kvm_init()'s opaque param to additional arch funcs"). > > > > Right? > > What I meant is literally do > > git revert -s b99040853738 > > and then manually handle RISC-V. Doh, to be clear, "manually handle RISC-V _in the same commit_".
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 14106a7c75b5..c196f005a2d3 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -73,7 +73,7 @@ int kvm_arch_hardware_setup(void *opaque) return 0; } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { return 0; } diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index e59cb6246f76..c5dc4fe53bfc 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -140,7 +140,7 @@ int kvm_arch_hardware_setup(void *opaque) return 0; } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { return 0; } diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 2ad0ccd202d5..30c817f3fa0c 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -423,7 +423,7 @@ int kvm_arch_hardware_setup(void *opaque) return 0; } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { return kvmppc_core_check_processor_compat(); } diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c index 421ecf4e6360..3b0b104e443f 100644 --- a/arch/riscv/kvm/main.c +++ b/arch/riscv/kvm/main.c @@ -20,7 +20,7 @@ long kvm_arch_dev_ioctl(struct file *filp, return -EINVAL; } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { return 0; } diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 9c6d45d0d345..99c70d881cb6 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -252,7 +252,7 @@ int kvm_arch_hardware_enable(void) return 0; } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { return 0; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 770b68e72391..aa09c8792134 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11380,7 +11380,7 @@ void kvm_arch_hardware_unsetup(void) static_call(kvm_x86_hardware_unsetup)(); } -int kvm_arch_check_processor_compat(void *opaque) +int kvm_arch_check_processor_compat(void) { struct cpuinfo_x86 *c = &cpu_data(smp_processor_id()); diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 05862176df6a..630ffd2289c6 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1307,7 +1307,7 @@ int kvm_arch_hardware_enable(void); void kvm_arch_hardware_disable(void); int kvm_arch_hardware_setup(void *opaque); void kvm_arch_hardware_unsetup(void); -int kvm_arch_check_processor_compat(void *opaque); +int kvm_arch_check_processor_compat(void); int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 168d0ab93c88..4e1e7770e984 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5600,22 +5600,14 @@ struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) return &kvm_running_vcpu; } -struct kvm_cpu_compat_check { - void *opaque; - int *ret; -}; - static void check_processor_compat(void *data) { - struct kvm_cpu_compat_check *c = data; - - *c->ret = kvm_arch_check_processor_compat(c->opaque); + *(int *)data = kvm_arch_check_processor_compat(); } int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, struct module *module) { - struct kvm_cpu_compat_check c; int r; int cpu; @@ -5643,10 +5635,8 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, if (r < 0) goto out_free_1; - c.ret = &r; - c.opaque = opaque; for_each_online_cpu(cpu) { - smp_call_function_single(cpu, check_processor_compat, &c, 1); + smp_call_function_single(cpu, check_processor_compat, &r, 1); if (r < 0) goto out_free_2; }
No arch implementation uses this opaque now. Signed-off-by: Chao Gao <chao.gao@intel.com> --- arch/arm64/kvm/arm.c | 2 +- arch/mips/kvm/mips.c | 2 +- arch/powerpc/kvm/powerpc.c | 2 +- arch/riscv/kvm/main.c | 2 +- arch/s390/kvm/kvm-s390.c | 2 +- arch/x86/kvm/x86.c | 2 +- include/linux/kvm_host.h | 2 +- virt/kvm/kvm_main.c | 14 ++------------ 8 files changed, 9 insertions(+), 19 deletions(-)