* [patch 0/2] support RT_PRIO_HC hypercall @ 2017-09-21 12:03 ` Marcelo Tosatti 0 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel Add the following CPU options: allow-rt-prio-hc: allow guest to execute hypercall to change vcpu thread priority. rt-prio: SCHED_FIFO priority to be used when that hypercall is invoked. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [patch 0/2] support RT_PRIO_HC hypercall @ 2017-09-21 12:03 ` Marcelo Tosatti 0 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel Add the following CPU options: allow-rt-prio-hc: allow guest to execute hypercall to change vcpu thread priority. rt-prio: SCHED_FIFO priority to be used when that hypercall is invoked. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> ^ permalink raw reply [flat|nested] 6+ messages in thread
* [patch 1/2] qemu: sync linux-headers with KVM 2017-09-21 12:03 ` [Qemu-devel] " Marcelo Tosatti @ 2017-09-21 12:03 ` Marcelo Tosatti -1 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel; +Cc: Marcelo Tosatti [-- Attachment #1: sync-linux-headers --] [-- Type: text/plain, Size: 2000 bytes --] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Index: qemu-fifoprio/linux-headers/linux/kvm.h =================================================================== --- qemu-fifoprio.orig/linux-headers/linux/kvm.h +++ qemu-fifoprio/linux-headers/linux/kvm.h @@ -929,6 +929,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_PPC_SMT_POSSIBLE 147 #define KVM_CAP_HYPERV_SYNIC2 148 #define KVM_CAP_HYPERV_VP_INDEX 149 +#define KVM_CAP_VCPU_RT_PRIO_HC 150 #ifdef KVM_CAP_IRQ_ROUTING @@ -1355,6 +1356,8 @@ struct kvm_s390_ucas_mapping { /* Available with KVM_CAP_S390_CMMA_MIGRATION */ #define KVM_S390_GET_CMMA_BITS _IOWR(KVMIO, 0xb8, struct kvm_s390_cmma_log) #define KVM_S390_SET_CMMA_BITS _IOW(KVMIO, 0xb9, struct kvm_s390_cmma_log) +/* Available with KVM_CAP_VCPU_RT_PRIO_HC */ +#define KVM_SET_VCPU_RT_PRIO_HC _IOW(KVMIO, 0xba, struct kvm_vcpu_rt_prio) #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0) #define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1) Index: qemu-fifoprio/linux-headers/asm-x86/kvm.h =================================================================== --- qemu-fifoprio.orig/linux-headers/asm-x86/kvm.h +++ qemu-fifoprio/linux-headers/asm-x86/kvm.h @@ -353,6 +353,11 @@ struct kvm_xcrs { __u64 padding[16]; }; +struct kvm_vcpu_rt_prio { + __u32 enabled; + __u32 sched_priority; +}; + /* definition of registers in kvm_run */ struct kvm_sync_regs { }; Index: qemu-fifoprio/linux-headers/linux/kvm_para.h =================================================================== --- qemu-fifoprio.orig/linux-headers/linux/kvm_para.h +++ qemu-fifoprio/linux-headers/linux/kvm_para.h @@ -15,6 +15,7 @@ #define KVM_E2BIG E2BIG #define KVM_EPERM EPERM #define KVM_EOPNOTSUPP 95 +#define KVM_EINVAL EINVAL #define KVM_HC_VAPIC_POLL_IRQ 1 #define KVM_HC_MMU_OP 2 @@ -25,6 +26,7 @@ #define KVM_HC_MIPS_EXIT_VM 7 #define KVM_HC_MIPS_CONSOLE_OUTPUT 8 #define KVM_HC_CLOCK_PAIRING 9 +#define KVM_HC_RT_PRIO 10 /* * hypercalls use architecture specific ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [patch 1/2] qemu: sync linux-headers with KVM @ 2017-09-21 12:03 ` Marcelo Tosatti 0 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel; +Cc: Marcelo Tosatti [-- Attachment #1: sync-linux-headers --] [-- Type: text/plain, Size: 2000 bytes --] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Index: qemu-fifoprio/linux-headers/linux/kvm.h =================================================================== --- qemu-fifoprio.orig/linux-headers/linux/kvm.h +++ qemu-fifoprio/linux-headers/linux/kvm.h @@ -929,6 +929,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_PPC_SMT_POSSIBLE 147 #define KVM_CAP_HYPERV_SYNIC2 148 #define KVM_CAP_HYPERV_VP_INDEX 149 +#define KVM_CAP_VCPU_RT_PRIO_HC 150 #ifdef KVM_CAP_IRQ_ROUTING @@ -1355,6 +1356,8 @@ struct kvm_s390_ucas_mapping { /* Available with KVM_CAP_S390_CMMA_MIGRATION */ #define KVM_S390_GET_CMMA_BITS _IOWR(KVMIO, 0xb8, struct kvm_s390_cmma_log) #define KVM_S390_SET_CMMA_BITS _IOW(KVMIO, 0xb9, struct kvm_s390_cmma_log) +/* Available with KVM_CAP_VCPU_RT_PRIO_HC */ +#define KVM_SET_VCPU_RT_PRIO_HC _IOW(KVMIO, 0xba, struct kvm_vcpu_rt_prio) #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0) #define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1) Index: qemu-fifoprio/linux-headers/asm-x86/kvm.h =================================================================== --- qemu-fifoprio.orig/linux-headers/asm-x86/kvm.h +++ qemu-fifoprio/linux-headers/asm-x86/kvm.h @@ -353,6 +353,11 @@ struct kvm_xcrs { __u64 padding[16]; }; +struct kvm_vcpu_rt_prio { + __u32 enabled; + __u32 sched_priority; +}; + /* definition of registers in kvm_run */ struct kvm_sync_regs { }; Index: qemu-fifoprio/linux-headers/linux/kvm_para.h =================================================================== --- qemu-fifoprio.orig/linux-headers/linux/kvm_para.h +++ qemu-fifoprio/linux-headers/linux/kvm_para.h @@ -15,6 +15,7 @@ #define KVM_E2BIG E2BIG #define KVM_EPERM EPERM #define KVM_EOPNOTSUPP 95 +#define KVM_EINVAL EINVAL #define KVM_HC_VAPIC_POLL_IRQ 1 #define KVM_HC_MMU_OP 2 @@ -25,6 +26,7 @@ #define KVM_HC_MIPS_EXIT_VM 7 #define KVM_HC_MIPS_CONSOLE_OUTPUT 8 #define KVM_HC_CLOCK_PAIRING 9 +#define KVM_HC_RT_PRIO 10 /* * hypercalls use architecture specific ^ permalink raw reply [flat|nested] 6+ messages in thread
* [patch 2/2] qemu: kvm: support RT_PRIO_HC hypercall 2017-09-21 12:03 ` [Qemu-devel] " Marcelo Tosatti @ 2017-09-21 12:03 ` Marcelo Tosatti -1 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel; +Cc: Marcelo Tosatti [-- Attachment #1: qemu-toggle-kvmrt-prio --] [-- Type: text/plain, Size: 3062 bytes --] Add the following CPU options: allow-rt-prio-hc: allow guest to execute hypercall to change vcpu thread priority. rt-prio: SCHED_FIFO priority to be used when that hypercall is invoked. See kernel patchset for details about this hypercall. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> --- target/i386/cpu.c | 2 ++ target/i386/cpu.h | 4 ++++ target/i386/kvm.c | 23 +++++++++++++++++++++++ 3 files changed, 29 insertions(+) Index: qemu-fifoprio/target/i386/cpu.c =================================================================== --- qemu-fifoprio.orig/target/i386/cpu.c +++ qemu-fifoprio/target/i386/cpu.c @@ -4106,6 +4106,8 @@ static Property x86_cpu_properties[] = { false), DEFINE_PROP_BOOL("vmware-cpuid-freq", X86CPU, vmware_cpuid_freq, true), DEFINE_PROP_BOOL("tcg-cpuid", X86CPU, expose_tcg, true), + DEFINE_PROP_BOOL("allow-rt-prio-hc", X86CPU, allow_rt_prio_hc, false), + DEFINE_PROP_UINT32("rt-prio", X86CPU, rt_prio_hc, 0), DEFINE_PROP_END_OF_LIST() }; Index: qemu-fifoprio/target/i386/cpu.h =================================================================== --- qemu-fifoprio.orig/target/i386/cpu.h +++ qemu-fifoprio/target/i386/cpu.h @@ -1215,6 +1215,7 @@ struct X86CPU { bool hyperv_runtime; bool hyperv_synic; bool hyperv_stimer; + bool allow_rt_prio_hc; bool check_cpuid; bool enforce_cpuid; bool expose_kvm; @@ -1270,6 +1271,9 @@ struct X86CPU { /* Number of physical address bits supported */ uint32_t phys_bits; + /* RT priority of VCPU thread, when hypercall is invoked by guest */ + uint32_t rt_prio_hc; + /* in order to simplify APIC support, we leave this pointer to the user */ struct DeviceState *apic_state; Index: qemu-fifoprio/target/i386/kvm.c =================================================================== --- qemu-fifoprio.orig/target/i386/kvm.c +++ qemu-fifoprio/target/i386/kvm.c @@ -673,6 +673,28 @@ static int hyperv_handle_properties(CPUS static Error *invtsc_mig_blocker; +static int enable_allow_rt_prio_hc(CPUState *cs) +{ + int ret; + struct kvm_vcpu_rt_prio rt_prio; + X86CPU *cpu = X86_CPU(cs); + + if (!kvm_check_extension(kvm_state, KVM_CAP_VCPU_RT_PRIO_HC)) { + fprintf(stderr, "RT prio hypercall not supported by kernel\n"); + return -ENOSYS; + } + + rt_prio.sched_priority = cpu->rt_prio_hc; + rt_prio.enabled = 1; + + ret = kvm_vcpu_ioctl(cs, KVM_ENABLE_VCPU_RT_PRIO_HC, &rt_prio); + if (ret) { + fprintf(stderr, "RT prio hypercall failed, ret=%d\n", ret); + } + + return ret; +} + #define KVM_MAX_CPUID_ENTRIES 100 int kvm_arch_init_vcpu(CPUState *cs) @@ -758,6 +780,12 @@ int kvm_arch_init_vcpu(CPUState *cs) has_msr_hv_hypercall = true; } + if (cpu->allow_rt_prio_hc) { + if (enable_allow_rt_prio_hc(cs)) { + abort(); + } + } + if (cpu->expose_kvm) { memcpy(signature, "KVMKVMKVM\0\0\0", 12); c = &cpuid_data.entries[cpuid_i++]; ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Qemu-devel] [patch 2/2] qemu: kvm: support RT_PRIO_HC hypercall @ 2017-09-21 12:03 ` Marcelo Tosatti 0 siblings, 0 replies; 6+ messages in thread From: Marcelo Tosatti @ 2017-09-21 12:03 UTC (permalink / raw) To: kvm, qemu-devel; +Cc: Marcelo Tosatti [-- Attachment #1: qemu-toggle-kvmrt-prio --] [-- Type: text/plain, Size: 3062 bytes --] Add the following CPU options: allow-rt-prio-hc: allow guest to execute hypercall to change vcpu thread priority. rt-prio: SCHED_FIFO priority to be used when that hypercall is invoked. See kernel patchset for details about this hypercall. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> --- target/i386/cpu.c | 2 ++ target/i386/cpu.h | 4 ++++ target/i386/kvm.c | 23 +++++++++++++++++++++++ 3 files changed, 29 insertions(+) Index: qemu-fifoprio/target/i386/cpu.c =================================================================== --- qemu-fifoprio.orig/target/i386/cpu.c +++ qemu-fifoprio/target/i386/cpu.c @@ -4106,6 +4106,8 @@ static Property x86_cpu_properties[] = { false), DEFINE_PROP_BOOL("vmware-cpuid-freq", X86CPU, vmware_cpuid_freq, true), DEFINE_PROP_BOOL("tcg-cpuid", X86CPU, expose_tcg, true), + DEFINE_PROP_BOOL("allow-rt-prio-hc", X86CPU, allow_rt_prio_hc, false), + DEFINE_PROP_UINT32("rt-prio", X86CPU, rt_prio_hc, 0), DEFINE_PROP_END_OF_LIST() }; Index: qemu-fifoprio/target/i386/cpu.h =================================================================== --- qemu-fifoprio.orig/target/i386/cpu.h +++ qemu-fifoprio/target/i386/cpu.h @@ -1215,6 +1215,7 @@ struct X86CPU { bool hyperv_runtime; bool hyperv_synic; bool hyperv_stimer; + bool allow_rt_prio_hc; bool check_cpuid; bool enforce_cpuid; bool expose_kvm; @@ -1270,6 +1271,9 @@ struct X86CPU { /* Number of physical address bits supported */ uint32_t phys_bits; + /* RT priority of VCPU thread, when hypercall is invoked by guest */ + uint32_t rt_prio_hc; + /* in order to simplify APIC support, we leave this pointer to the user */ struct DeviceState *apic_state; Index: qemu-fifoprio/target/i386/kvm.c =================================================================== --- qemu-fifoprio.orig/target/i386/kvm.c +++ qemu-fifoprio/target/i386/kvm.c @@ -673,6 +673,28 @@ static int hyperv_handle_properties(CPUS static Error *invtsc_mig_blocker; +static int enable_allow_rt_prio_hc(CPUState *cs) +{ + int ret; + struct kvm_vcpu_rt_prio rt_prio; + X86CPU *cpu = X86_CPU(cs); + + if (!kvm_check_extension(kvm_state, KVM_CAP_VCPU_RT_PRIO_HC)) { + fprintf(stderr, "RT prio hypercall not supported by kernel\n"); + return -ENOSYS; + } + + rt_prio.sched_priority = cpu->rt_prio_hc; + rt_prio.enabled = 1; + + ret = kvm_vcpu_ioctl(cs, KVM_ENABLE_VCPU_RT_PRIO_HC, &rt_prio); + if (ret) { + fprintf(stderr, "RT prio hypercall failed, ret=%d\n", ret); + } + + return ret; +} + #define KVM_MAX_CPUID_ENTRIES 100 int kvm_arch_init_vcpu(CPUState *cs) @@ -758,6 +780,12 @@ int kvm_arch_init_vcpu(CPUState *cs) has_msr_hv_hypercall = true; } + if (cpu->allow_rt_prio_hc) { + if (enable_allow_rt_prio_hc(cs)) { + abort(); + } + } + if (cpu->expose_kvm) { memcpy(signature, "KVMKVMKVM\0\0\0", 12); c = &cpuid_data.entries[cpuid_i++]; ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2017-09-21 12:18 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2017-09-21 12:03 [patch 0/2] support RT_PRIO_HC hypercall Marcelo Tosatti 2017-09-21 12:03 ` [Qemu-devel] " Marcelo Tosatti 2017-09-21 12:03 ` [patch 1/2] qemu: sync linux-headers with KVM Marcelo Tosatti 2017-09-21 12:03 ` [Qemu-devel] " Marcelo Tosatti 2017-09-21 12:03 ` [patch 2/2] qemu: kvm: support RT_PRIO_HC hypercall Marcelo Tosatti 2017-09-21 12:03 ` [Qemu-devel] " Marcelo Tosatti
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