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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-02-15 17:52:47 -0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:22 +0300 |
| commit | 18068523d3a0b41fcee5b53cdb437a0ab4d65e4b (patch) | |
| tree | cbedbd4371cb57c34728137988a7433ae736d79a /include/asm-x86 | |
| parent | 24e09cbf480a72f9c952af4ca77b159503dca44b (diff) | |
| download | linux-18068523d3a0b41fcee5b53cdb437a0ab4d65e4b.tar.bz2 | |
KVM: paravirtualized clocksource: host part
This is the host part of kvm clocksource implementation. As it does
not include clockevents, it is a fairly simple implementation. We
only have to register a per-vcpu area, and start writing to it periodically.
The area is binary compatible with xen, as we use the same shadow_info
structure.
[marcelo: fix bad_page on MSR_KVM_SYSTEM_TIME]
[avi: save full value of the msr, even if enable bit is clear]
[avi: clear previous value of time_page]
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/kvm_host.h | 7 | ||||
| -rw-r--r-- | include/asm-x86/kvm_para.h | 25 |
2 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h index 623249890a0b..90c80fd830fc 100644 --- a/include/asm-x86/kvm_host.h +++ b/include/asm-x86/kvm_host.h @@ -262,6 +262,11 @@ struct kvm_vcpu_arch { /* emulate context */ struct x86_emulate_ctxt emulate_ctxt; + + gpa_t time; + struct kvm_vcpu_time_info hv_clock; + unsigned int time_offset; + struct page *time_page; }; struct kvm_mem_alias { @@ -288,6 +293,8 @@ struct kvm_arch{ int round_robin_prev_vcpu; unsigned int tss_addr; struct page *apic_access_page; + + gpa_t wall_clock; }; struct kvm_vm_stat { diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h index c6f3fd8d8c53..5ab7d3dbd357 100644 --- a/include/asm-x86/kvm_para.h +++ b/include/asm-x86/kvm_para.h @@ -10,10 +10,35 @@ * paravirtualization, the appropriate feature bit should be checked. */ #define KVM_CPUID_FEATURES 0x40000001 +#define KVM_FEATURE_CLOCKSOURCE 0 + +#define MSR_KVM_WALL_CLOCK 0x11 +#define MSR_KVM_SYSTEM_TIME 0x12 #ifdef __KERNEL__ #include <asm/processor.h> +/* xen binary-compatible interface. See xen headers for details */ +struct kvm_vcpu_time_info { + uint32_t version; + uint32_t pad0; + uint64_t tsc_timestamp; + uint64_t system_time; + uint32_t tsc_to_system_mul; + int8_t tsc_shift; + int8_t pad[3]; +} __attribute__((__packed__)); /* 32 bytes */ + +struct kvm_wall_clock { + uint32_t wc_version; + uint32_t wc_sec; + uint32_t wc_nsec; +} __attribute__((__packed__)); + + +extern void kvmclock_init(void); + + /* This instruction is vmcall. On non-VT architectures, it will generate a * trap that we will then rewrite to the appropriate instruction. */ |