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hv: sched: support vcpu context switch on one pcpu

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To support cpu sharing, multiple vcpu can run on same pcpu. We need do
necessary vcpu context switch. This patch add below actions in context
switch.
  1) fxsave/fxrstor;
  2) save/restore MSRs: MSR_IA32_STAR, MSR_IA32_LSTAR,
	MSR_IA32_FMASK, MSR_IA32_KERNEL_GS_BASE;
  3) switch vmcs.

Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shuo A Liu
2019-06-12 15:56:25 +08:00
committed by ACRN System Integration
parent 7e66c0d4fa
commit dadcdcefa0
5 changed files with 54 additions and 25 deletions
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11
hypervisor/include/arch/x86/guest/vcpu.h
View File

@@ -538,6 +538,17 @@ static inline bool is_pae(struct acrn_vcpu *vcpu)
return (vcpu_get_cr4(vcpu) & CR4_PAE) != 0UL;
}
static inline void save_fxstore_guest_area(struct ext_context *ext_ctx)
{
asm volatile("fxsave (%0)"
: : "r" (ext_ctx->fxstore_guest_area) : "memory");
}
static inline void rstor_fxstore_guest_area(const struct ext_context *ext_ctx)
{
asm volatile("fxrstor (%0)" : : "r" (ext_ctx->fxstore_guest_area));
}
struct acrn_vcpu *get_running_vcpu(uint16_t pcpu_id);
struct acrn_vcpu* get_ever_run_vcpu(uint16_t pcpu_id);

1
hypervisor/include/arch/x86/guest/vmcs.h
View File

@@ -41,6 +41,7 @@ static inline uint64_t apic_access_offset(uint64_t qual)
return (qual & APIC_ACCESS_OFFSET);
}
void init_vmcs(struct acrn_vcpu *vcpu);
void switch_vmcs(const struct acrn_vcpu *vcpu);
void switch_apicv_mode_x2apic(struct acrn_vcpu *vcpu);
#endif /* ASSEMBLER */