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* x86: merge all geode based subtargets into oneFelix Fietkau2015-03-165-131/+0
* x86: update to linux 3.14Felix Fietkau2014-12-081-0/+5
* x86: rename */config-3.10 to */config-defaultFelix Fietkau2014-12-081-0/+0
* network: Unbind DHCPv6 from underlying interfacesSteven Barth2014-10-081-1/+1
* x86: set default kernel version to 3.10Felix Fietkau2014-04-111-1/+0
* kernel: update 3.10 to 3.10.34Gabor Juhos2014-03-271-1/+1
* kernel: update 3.10 to 3.10.32Gabor Juhos2014-02-231-1/+1
* kernel: update 3.10 to 3.10.28Gabor Juhos2014-01-261-1/+1
* kernel: update 3.10 to 3.10.26Gabor Juhos2014-01-111-1/+1
* kernel: update kernel 3.10 to 3.10.24Hauke Mehrtens2013-12-151-1/+1
* kernel: update 3.10 to 3.10.21Gabor Juhos2013-12-011-1/+1
* kernel: update 3.10 to 3.10.18Gabor Juhos2013-11-051-1/+1
* kernel: update 3.10 to 3.10.17Gabor Juhos2013-10-231-1/+1
* x86: Update kernel for alix2 to 3.10.15Felix Fietkau2013-10-171-1/+1
* kernel: update 3.10 to 3.10.13Gabor Juhos2013-09-271-1/+1
* build: unify x86 target cflagsFelix Fietkau2013-09-261-2/+1
* kernel: update 3.10 to 3.10.12Gabor Juhos2013-09-151-1/+1
* kernel: update 3.10 to 3.10.10Gabor Juhos2013-09-021-1/+1
* x86/alix2: remove kernel config for 3.8Gabor Juhos2013-09-021-26/+0
* x86/alix2: switch to 3.10.9Gabor Juhos2013-09-021-1/+1
* x86/alix2: add kernel config for 3.10Gabor Juhos2013-09-021-0/+24
* x86/alix2: add kmod-usb2-pci to default packagesGabor Juhos2013-08-251-1/+1
* target: don't build jffs2 nor images by defaultJonas Gorski2013-06-051-1/+1
* kernel: update linux 3.8 to 3.8.13Gabor Juhos2013-05-261-1/+1
* kernel: update linux 3.8 to 3.8.12Gabor Juhos2013-05-081-1/+1
* kernel: update linux 3.8 to 3.8.11Gabor Juhos2013-05-011-1/+1
* kernel: update linux 3.8 to 3.8.10Gabor Juhos2013-04-301-1/+1
* kernel: update linux 3.8 to 3.8.9Gabor Juhos2013-04-261-1/+1
* Change default IPv6 config to enable DHCPv6-PDSteven Barth2013-04-221-1/+1
* kernel: update linux 3.8 to 3.8.8Gabor Juhos2013-04-191-1/+1
* kernel: update linux 3.8 to 3.8.7Gabor Juhos2013-04-141-1/+1
* Adapt default network configuration for IPv6Steven Barth2013-04-091-0/+8
* x86/alix2: remove old kernel configsGabor Juhos2013-04-072-52/+0
* x86/alix2: switch to 3.8Gabor Juhos2013-04-071-1/+1
* x86/alix2: add config for 3.8Gabor Juhos2013-04-071-0/+26
* kernel: add some missing config options found by the buildbot.Hauke Mehrtens2013-03-101-1/+0
* kernel: update linux 3.7 to 3.7.10Gabor Juhos2013-03-031-1/+1
* kernel: update linux 3.7 to 3.7.9Gabor Juhos2013-02-171-1/+1
* kernel: update linux 3.7 to 3.7.8Gabor Juhos2013-02-151-1/+1
* kernel: update linux 3.7 to 3.7.7Gabor Juhos2013-02-121-1/+1
* kernel: update linux 3.7 to 3.7.6Gabor Juhos2013-02-041-1/+1
* alix2: convert from kernel version 3.3.8 to 3.7.5Gabor Juhos2013-02-022-1/+29
* x86: fix typo in alix2/net5501 default packagesFelix Fietkau2013-01-021-1/+1
* x86: remove support for old kernelsGabor Juhos2012-05-181-25/+0
* x86: remove subtarget specific LINUX_VERSION overridesGabor Juhos2012-05-181-1/+0
* x86/alix2: switch to 3.3Gabor Juhos2012-05-162-1/+26
* x86: sync 3.2 configsGabor Juhos2012-05-161-5/+9
* linux: move certain disabled symbols to the generic configsGabor Juhos2012-05-151-7/+0
* kernel: update linux 3.2 to 3.2.16Jonas Gorski2012-04-241-1/+1
* kernel: x86: also update subtarget kernel versionsJonas Gorski2012-04-171-1/+1
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-01 20:00:41 +0000
ypedef long long i64; #define NSEC_PER_SEC 1000000000L #endif static inline void hvm_cpuid(u32 idx, u32 sub, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) { *eax = idx, *ecx = sub; asm("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "0" (*eax), "2" (*ecx)); } static inline void pv_cpuid(u32 idx, u32 sub, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) { *eax = idx, *ecx = sub; asm volatile ( "ud2a ; .ascii \"xen\"; cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "0" (*eax), "2" (*ecx)); } static inline u64 do_rdtscp(u32 *aux) { static u64 last = 0; u32 lo32, hi32; u64 val; asm volatile(".byte 0x0f,0x01,0xf9":"=a"(lo32),"=d"(hi32),"=c" (*aux)); val = lo32 | ((u64)hi32 << 32); return val; } static inline int get_xen_tsc_mode(void) { u32 val, dummy1, dummy2, dummy3; pv_cpuid(0x40000003,0,&dummy1,&val,&dummy2,&dummy3); return val; } static inline int get_xen_vtsc(void) { u32 val, dummy1, dummy2, dummy3; pv_cpuid(0x40000003,0,&val,&dummy1,&dummy2,&dummy3); return val & 1; } static inline int get_xen_vtsc_khz(void) { u32 val, dummy1, dummy2, dummy3; pv_cpuid(0x40000003,0,&dummy1,&dummy2,&val,&dummy3); return val; } static inline u32 get_xen_cpu_khz(void) { u32 cpu_khz, dummy1, dummy2, dummy3; pv_cpuid(0x40000003,2,&cpu_khz,&dummy1,&dummy2,&dummy3); return cpu_khz; } static inline u32 get_xen_incarnation(void) { u32 incarn, dummy1, dummy2, dummy3; pv_cpuid(0x40000003,0,&dummy1,&dummy2,&dummy3,&incarn); return incarn; } static inline void get_xen_time_values(u64 *offset, u32 *mul_frac, u32 *shift) { u32 off_lo, off_hi, sys_lo, sys_hi, dummy; pv_cpuid(0x40000003,1,&off_lo,&off_hi,mul_frac,shift); *offset = off_lo | ((u64)off_hi << 32); } static inline u64 scale_delta(u64 delta, u32 tsc_mul_frac, i32 tsc_shift) { u64 product; #ifdef __X86_32__ u32 tmp1, tmp2; #endif if ( tsc_shift < 0 ) delta >>= -tsc_shift; else delta <<= tsc_shift; #ifdef __X86_32__ asm ( "mul %5 ; " "mov %4,%%eax ; " "mov %%edx,%4 ; " "mul %5 ; " "xor %5,%5 ; " "add %4,%%eax ; " "adc %5,%%edx ; " : "=A" (product), "=r" (tmp1), "=r" (tmp2) : "a" ((u32)delta), "1" ((u32)(delta >> 32)), "2" (tsc_mul_frac) ); #else asm ( "mul %%rdx ; shrd $32,%%rdx,%%rax" : "=a" (product) : "0" (delta), "d" ((u64)tsc_mul_frac) ); #endif return product; } static inline u64 get_pvrdtscp_timestamp(int *discontinuity) { static int firsttime = 1; static u64 last_pvrdtscp_timestamp = 0; static u32 last_tsc_aux; static u64 xen_ns_offset; static u32 xen_tsc_to_ns_mul_frac, xen_tsc_to_ns_shift; u32 this_tsc_aux; u64 timestamp, cur_tsc, cur_ns; if (firsttime) { cur_tsc = do_rdtscp(&last_tsc_aux); get_xen_time_values(&xen_ns_offset, &xen_tsc_to_ns_mul_frac, &xen_tsc_to_ns_shift); cur_ns = scale_delta(cur_tsc, xen_tsc_to_ns_mul_frac, xen_tsc_to_ns_shift); timestamp = cur_ns - xen_ns_offset; last_pvrdtscp_timestamp = timestamp; firsttime = 0; } cur_tsc = do_rdtscp(&this_tsc_aux); *discontinuity = 0; while (this_tsc_aux != last_tsc_aux) { /* if tsc_aux changed, try again */ last_tsc_aux = this_tsc_aux; get_xen_time_values(&xen_ns_offset, &xen_tsc_to_ns_mul_frac, &xen_tsc_to_ns_shift); cur_tsc = do_rdtscp(&this_tsc_aux); *discontinuity = 1; } /* compute nsec from TSC and Xen time values */ cur_ns = scale_delta(cur_tsc, xen_tsc_to_ns_mul_frac, xen_tsc_to_ns_shift); timestamp = cur_ns - xen_ns_offset; /* enforce monotonicity just in case */ if ((i64)(timestamp - last_pvrdtscp_timestamp) > 0) last_pvrdtscp_timestamp = timestamp; else { /* this should never happen but we'll check it anyway in * case of some strange combination of scaling errors * occurs across a very fast migration */ printf("Time went backwards by %lluns\n", (unsigned long long)(last_pvrdtscp_timestamp-timestamp)); timestamp = ++last_pvrdtscp_timestamp; } return timestamp; } #define HVM 1 #define PVM 0 static int running_on_xen(int hvm, u16 *version_major, u16 *version_minor) { u32 eax, ebx, ecx, edx, base; union { char csig[16]; u32 u[4]; } sig; for (base=0x40000000; base < 0x40010000; base += 0x100) { if (hvm==HVM) hvm_cpuid(base,0,&eax,&ebx,&ecx,&edx); else pv_cpuid(base,0,&eax,&ebx,&ecx,&edx); sig.u[0] = ebx; sig.u[1] = ecx; sig.u[2] = edx; sig.csig[12] = '\0'; if (!strcmp("XenVMMXenVMM",&sig.csig[0]) && (eax >= (base+2))) { if (hvm==HVM) hvm_cpuid(base+1,0,&eax,&ebx,&ecx,&edx); else pv_cpuid(base+1,0,&eax,&ebx,&ecx,&edx); *version_major = (eax >> 16) & 0xffff; *version_minor = eax & 0xffff; return 1; } } return 0; } main(int ac, char **av) { u32 dummy; u16 version_hi, version_lo; u64 ts, last_ts; int status, discontinuity = 0; pid_t pid; if (running_on_xen(HVM,&version_hi,&version_lo)) { printf("running on Xen v%d.%d as an HVM domain, " "pvrdtsc not supported, exiting\n", (int)version_hi, (int)version_lo); exit(0); } pid = fork(); if (pid == -1) { fprintf(stderr,"Huh? Fork failed\n"); return 0; } else if (pid == 0) { /* child */ pv_cpuid(0x40000000,0,&dummy,&dummy,&dummy,&dummy); exit(0); } waitpid(pid,&status,0); if (!WIFEXITED(status)) exit(0); if (!running_on_xen(PVM,&version_hi,&version_lo)) { printf("not running on Xen, exiting\n"); exit(0); } printf("running on Xen v%d.%d as a PV domain\n", (int)version_hi, (int)version_lo); if ( version_hi <= 3 ) { printf("pvrdtscp requires Xen version 4.0 or greater\n"); /* exit(0); FIXME after xen-unstable is officially v4.0 */ } if ( get_xen_tsc_mode() != 3 ) printf("tsc_mode not pvrdtscp, set tsc_mode=3, exiting\n"); /* OK, we are on Xen, now loop forever checking timestamps */ ts = get_pvrdtscp_timestamp(&discontinuity); printf("Starting with ts=%lluns 0x%llx (%llusec)\n",ts,ts,ts/NSEC_PER_SEC); printf("incarn=%d: vtsc=%d, vtsc_khz=%lu, phys cpu_khz=%lu\n", (unsigned long)get_xen_incarnation(), (unsigned long)get_xen_vtsc(), (unsigned long)get_xen_vtsc_khz(), (unsigned long)get_xen_cpu_khz()); ts = get_pvrdtscp_timestamp(&discontinuity); last_ts = ts; while (1) { ts = get_pvrdtscp_timestamp(&discontinuity); if (discontinuity) printf("migrated/restored, incarn=%d: " "vtsc now %d, vtsc_khz=%lu, phys cpu_khz=%lu\n", (unsigned long)get_xen_incarnation(), (unsigned long)get_xen_vtsc(), (unsigned long)get_xen_vtsc_khz(), (unsigned long)get_xen_cpu_khz()); if (ts < last_ts) /* this should NEVER happen, especially since there * is a check for it in get_pvrdtscp_timestamp() */ printf("Time went backwards: %lluns (%llusec)\n", last_ts-ts,(last_ts-ts)/NSEC_PER_SEC); if (ts > last_ts + 200000000LL) /* this is OK, usually about 2sec for save/restore * and a fraction of a second for live migrate */ printf("Time jumped forward %lluns (%llusec)\n", ts-last_ts,(ts-last_ts)/NSEC_PER_SEC); last_ts = ts; } }
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-01 20:00:40 +0000