diff options
-rw-r--r-- | arch/x86/include/asm/hypervisor.h | 3 | ||||
-rw-r--r-- | arch/x86/include/asm/xen/hypervisor.h | 35 | ||||
-rw-r--r-- | arch/x86/xen/enlighten.c | 31 |
3 files changed, 50 insertions, 19 deletions
diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h index 0c6f7af7fda8..7a15153c675d 100644 --- a/arch/x86/include/asm/hypervisor.h +++ b/arch/x86/include/asm/hypervisor.h @@ -21,6 +21,7 @@ #define _ASM_X86_HYPERVISOR_H #include <asm/kvm_para.h> +#include <asm/xen/hypervisor.h> extern void init_hypervisor(struct cpuinfo_x86 *c); extern void init_hypervisor_platform(void); @@ -53,6 +54,8 @@ static inline bool hypervisor_x2apic_available(void) { if (kvm_para_available()) return true; + if (xen_x2apic_para_available()) + return true; return false; } diff --git a/arch/x86/include/asm/xen/hypervisor.h b/arch/x86/include/asm/xen/hypervisor.h index 396ff4cc8ed4..66d0fff1ee84 100644 --- a/arch/x86/include/asm/xen/hypervisor.h +++ b/arch/x86/include/asm/xen/hypervisor.h @@ -37,4 +37,39 @@ extern struct shared_info *HYPERVISOR_shared_info; extern struct start_info *xen_start_info; +#include <asm/processor.h> + +static inline uint32_t xen_cpuid_base(void) +{ + uint32_t base, eax, ebx, ecx, edx; + char signature[13]; + + for (base = 0x40000000; base < 0x40010000; base += 0x100) { + cpuid(base, &eax, &ebx, &ecx, &edx); + *(uint32_t *)(signature + 0) = ebx; + *(uint32_t *)(signature + 4) = ecx; + *(uint32_t *)(signature + 8) = edx; + signature[12] = 0; + + if (!strcmp("XenVMMXenVMM", signature) && ((eax - base) >= 2)) + return base; + } + + return 0; +} + +#ifdef CONFIG_XEN +extern bool xen_hvm_need_lapic(void); + +static inline bool xen_x2apic_para_available(void) +{ + return xen_hvm_need_lapic(); +} +#else +static inline bool xen_x2apic_para_available(void) +{ + return (xen_cpuid_base() != 0); +} +#endif + #endif /* _ASM_X86_XEN_HYPERVISOR_H */ diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 44dcad43989d..5b8986fe3371 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1256,25 +1256,6 @@ asmlinkage void __init xen_start_kernel(void) #endif } -static uint32_t xen_cpuid_base(void) -{ - uint32_t base, eax, ebx, ecx, edx; - char signature[13]; - - for (base = 0x40000000; base < 0x40010000; base += 0x100) { - cpuid(base, &eax, &ebx, &ecx, &edx); - *(uint32_t *)(signature + 0) = ebx; - *(uint32_t *)(signature + 4) = ecx; - *(uint32_t *)(signature + 8) = edx; - signature[12] = 0; - - if (!strcmp("XenVMMXenVMM", signature) && ((eax - base) >= 2)) - return base; - } - - return 0; -} - static int init_hvm_pv_info(int *major, int *minor) { uint32_t eax, ebx, ecx, edx, pages, msr, base; @@ -1384,6 +1365,18 @@ static bool __init xen_hvm_platform(void) return true; } +bool xen_hvm_need_lapic(void) +{ + if (xen_pv_domain()) + return false; + if (!xen_hvm_domain()) + return false; + if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback) + return false; + return true; +} +EXPORT_SYMBOL_GPL(xen_hvm_need_lapic); + const __refconst struct hypervisor_x86 x86_hyper_xen_hvm = { .name = "Xen HVM", .detect = xen_hvm_platform, |