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[PATCH v4 2/2] x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
2017 Feb 16
1
[PATCH v4 2/2] x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
..._para.h> +#endif + int main(void) { #ifdef CONFIG_PARAVIRT @@ -22,6 +26,13 @@ int main(void) BLANK(); #endif +#ifdef CONFIG_KVM_GUEST +#ifdef CONFIG_PARAVIRT_SPINLOCKS + OFFSET(KVM_STEAL_TIME_preempted, kvm_steal_time, preempted); + BLANK(); +#endif +#endif + #define ENTRY(entry) OFFSET(pt_regs_ ## entry, pt_regs, entry) ENTRY(bx); ENTRY(cx); --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -600,22 +600,21 @@ PV_CALLEE_SAVE_REGS_THUNK(__kvm_vcpu_is_ #else +#include <asm/asm-offsets.h> + extern bool __raw_callee_save___kvm_vcpu_is_preempted(long); /* * Hand-op...
[PATCH v4 2/2] x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
2017 Feb 16
1
[PATCH v4 2/2] x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
..._para.h> +#endif + int main(void) { #ifdef CONFIG_PARAVIRT @@ -22,6 +26,13 @@ int main(void) BLANK(); #endif +#ifdef CONFIG_KVM_GUEST +#ifdef CONFIG_PARAVIRT_SPINLOCKS + OFFSET(KVM_STEAL_TIME_preempted, kvm_steal_time, preempted); + BLANK(); +#endif +#endif + #define ENTRY(entry) OFFSET(pt_regs_ ## entry, pt_regs, entry) ENTRY(bx); ENTRY(cx); --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -600,22 +600,21 @@ PV_CALLEE_SAVE_REGS_THUNK(__kvm_vcpu_is_ #else +#include <asm/asm-offsets.h> + extern bool __raw_callee_save___kvm_vcpu_is_preempted(long); /* * Hand-op...
[PATCH v4 0/2] x86/kvm: Reduce vcpu_is_preempted() overhead
2017 Feb 15
4
[PATCH v4 0/2] x86/kvm: Reduce vcpu_is_preempted() overhead
v3->v4: - Fix x86-32 build error. v2->v3: - Provide an optimized __raw_callee_save___kvm_vcpu_is_preempted() in assembly as suggested by PeterZ. - Add a new patch to change vcpu_is_preempted() argument type to long to ease the writing of the assembly code. v1->v2: - Rerun the fio test on a different system on both bare-metal and a KVM guest. Both sockets were
[PATCH v4 0/2] x86/kvm: Reduce vcpu_is_preempted() overhead
2017 Feb 15
4
[PATCH v4 0/2] x86/kvm: Reduce vcpu_is_preempted() overhead
v3->v4: - Fix x86-32 build error. v2->v3: - Provide an optimized __raw_callee_save___kvm_vcpu_is_preempted() in assembly as suggested by PeterZ. - Add a new patch to change vcpu_is_preempted() argument type to long to ease the writing of the assembly code. v1->v2: - Rerun the fio test on a different system on both bare-metal and a KVM guest. Both sockets were