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main.cpp
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main.cpp
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#include "cacheutils.h"
#include "config.h"
#include "interface.h"
#include "logging.h"
#include "memory.h"
#include <algorithm>
#include <atomic>
#include <cstdint>
#include <cstdio>
#include <random>
#include <stdio.h>
#include <string.h>
#include <string_view>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <utility>
#include <vector>
// string utils
#define xstr(s) str(s)
#define str(s) #s
constexpr uint8_t PHYSICAL_CORES = 4;
constexpr uint8_t CORE = 1;
constexpr uint8_t SIBLING = CORE + 4; // required for -Power to work
// additional cores performing the Meltdown-power workload in background for amplification, set to zero if no additional cores should be used
constexpr uint8_t AMPLIFICATION_CORES = 0; // PHYSICAL_CORES - 1;
// choose the meltdown-power access type
constexpr int SYSCALL_TYPE = true ? DO_ACCESS : DO_RSB;
int fd;
#define PAPER_FIGURE_4
#define PAPER_TABLE_2_and_3
#define PAPER_FIGURE_9
#define PAPER_FIGURE_10
#define PAPER_FIGURE_12a_128x
#define PAPER_FIGURE_12a_1x
#define PAPER_FIGURE_13a
#define PAPER_FIGURE_15
/*
#undef PAPER_FIGURE_4
#undef PAPER_TABLE_2_and_3
#undef PAPER_FIGURE_9
#undef PAPER_FIGURE_10
#undef PAPER_FIGURE_12a_128x
#undef PAPER_FIGURE_12a_1x
#undef PAPER_FIGURE_13a
#undef PAPER_FIGURE_15
*/
// experiments contains the experiment for the config.
// each experiment is randomly sampled and executed
#if defined(PAPER_FIGURE_4)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD, Evict::NONE, 0, HWPF::DISABLED, CLFill::RANDOM, CLFill::RANDOM, 1 },
{ 2, 0, 128, 1, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::RANDOM, CLFill::RANDOM, 1 },
{ 3, 0, 128, 1, Inst::LOAD, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::RANDOM, CLFill::RANDOM, 1 },
};
#endif
#if defined(PAPER_TABLE_2_and_3)
static ExperimentConfig experiments[] = {
// Prefetch
{ 1, 0, 64, 1, Inst::PREFETCH, Evict::NONE, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 2, 0, 64, 1, Inst::PREFETCH, Evict::L1, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 3, 0, 64, 1, Inst::PREFETCH, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
// Store
{ 4, 0, 64, 1, Inst::STORE, Evict::NONE, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 5, 0, 64, 1, Inst::STORE, Evict::L1, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 6, 0, 64, 1, Inst::STORE, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
// Load
{ 7, 0, 64, 1, Inst::LOAD, Evict::NONE, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 8, 0, 64, 1, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
{ 9, 0, 64, 1, Inst::LOAD, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::DISTINCT, CLFill::DISTINCT, 1 },
};
#endif
#if defined(PAPER_FIGURE_9)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1 },
{ 2, 0, 128, 128, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1 },
};
#endif
#if defined(PAPER_FIGURE_9_FAST)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1 },
//{ 2, 0, 128, 128, Inst::LOAD, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1 },
};
#endif
#if defined(PAPER_FIGURE_10)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 128, Inst::LOAD, Evict::NONE, 0, HWPF::DISABLED, CLFill::RANDOM, CLFill::ZEROS, 1 },
{ 2, 0, 128, 128, Inst::LOAD, Evict::NONE, 0, HWPF::DISABLED, CLFill::CONSTANT, CLFill::ZEROS, 1 },
{ 3, 0, 128, 128, Inst::LOAD, Evict::NONE, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1 },
};
#endif
// FIGURE 11 reuses the data of PAPER_FIGURE_9
#if defined(PAPER_FIGURE_12a_128x)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD_MDS, Evict::NONE, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
{ 2, 0, 128, 1, Inst::LOAD_MDS, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
{ 3, 0, 128, 1, Inst::LOAD_MDS, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
};
#endif
#if defined(PAPER_FIGURE_12a_128x_FAST)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD_MDS, Evict::NONE, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
//{ 2, 0, 128, 1, Inst::LOAD_MDS, Evict::L1, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
//{ 3, 0, 128, 1, Inst::LOAD_MDS, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
};
#endif
#if defined(PAPER_FIGURE_12a_1x)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 128, Inst::LOAD_MDS, Evict::NONE, 0, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 2.095551 * 3 / 4 },
};
#endif
#if defined(PAPER_FIGURE_13a)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD_MELTDOWN, Evict::L1_L2, 49, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1.095551 * 0.1 },
{ 2, 0, 128, 1, Inst::STORE_MELTDOWN, Evict::L1_L2, 49, HWPF::DISABLED, CLFill::ZEROS, CLFill::ZEROS, 1.095551 * 0.1 },
};
#endif
#if defined(PAPER_FIGURE_15)
static ExperimentConfig experiments[] = {
{ 1, 0, 128, 1, Inst::LOAD, Evict::L1_L2, 0, HWPF::DISABLED, CLFill::DISTINCT_ADJACENT, CLFill::ZEROS, 1 },
{ 2, 0, 128, 1, Inst::LOAD, Evict::L1_L2, 0, HWPF::ENABLED, CLFill::DISTINCT_ADJACENT, CLFill::ZEROS, 1 },
};
#endif
// number of experiments
constexpr size_t N_experiments = sizeof(experiments) / sizeof(ExperimentConfig);
static test_data userspace_meltdown_experiment(ExperimentConfig const &config, uint8_t *target);
static test_data userspace_mds_experiment(ExperimentConfig const &config, uint8_t *target);
static test_data kernel_experiment(ExperimentConfig const &config, uint8_t *target);
// pin pthread to specific core
static void pin_core(uint8_t core) {
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(core, &cpuset);
pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset);
}
// setup memory for experiment and dispatch
static test_data run(ExperimentConfig const &c, Memory const &m, CLFillValue v, CLFillValue g) {
// get memory for experiment
uint8_t *mem = m.get_memory(c.eviction, c.l1_set);
// if we don't want any eviction we specify a different offset
// this is only one part ... no eviction also requires specific instructions
uint64_t offset = c.eviction == Evict::NONE ? 0x80 : 0;
// we use an offset 0x80 instead of 0x40 since a page has 64 cache lines and we only use 17
// therefore we still don't have any overlaps.
for ( uint64_t page = 0; page < 17; ++page ) {
// calculate cache line pointer
uint8_t *cl = mem + page * (0x1000 + offset);
// we choose the 2nd page as victim page
bool is_victim = page == 1;
// prepare the cache line
if ( is_victim ) {
v.fill_cl(c, cl);
}
else {
g.fill_cl(c, cl);
}
}
// configure the prefetchers
set_pf_control(c.pf_control);
// dispatch experiment
switch ( c.instruction ) {
case Inst::LOAD_MELTDOWN:
case Inst::STORE_MELTDOWN:
return userspace_meltdown_experiment(c, mem);
case Inst::LOAD_MDS:
case Inst::STORE_MDS:
return userspace_mds_experiment(c, mem);
default:
return kernel_experiment(c, mem);
};
}
static void do_access(uint8_t *target) {
asm volatile(".align 64 \n"
"1: \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
:
: [ nr ] "i"(__NR_ioctl), "D"(fd), "S"(DO_ACCESS), "d"(target)
: "rax", "rcx", "r11", "memory", "flags");
}
static uint8_t test[4096] = {};
[[gnu::noinline]] double test_flush_and_reload() {
uint64_t count = 0;
memset(test, 0xbb, 0x1000);
for ( uint64_t i = 0; i < 10000; ++i ) {
do_access((uint8_t *)test - 0x2000 + 48 * 64);
count += flush_reload_t(test + 48 * 64);
}
return count / 10000.0;
}
int main() {
// we open exactly our kernel module which is named after the parent's parent folder
fd = open("/dev/" xstr(NAME), O_RDWR);
if ( fd < 0 ) {
printf("cannot open kernel module is it loaded? forgot sudo?\n");
return -1;
}
double fr = test_flush_and_reload();
fprintf(stderr, "# flush+reload: %f\n", fr);
fprintf(stdout, "flush+reload: %f\n", fr);
// load ptedit for memory finding
if ( ptedit_init() ) {
printf("Error: Could not initialize PTEditor, did you load the kernel module?\n");
return -11;
}
// perform self inspection for debug purpose
self_inspection();
// we allocate 4 different test memories
constexpr size_t MEMORIES = 4;
std::vector<Memory> memories;
// initialise the memories
uint8_t *mem_base = (uint8_t *)0x7f5800000000;
for ( size_t m = 0; m < MEMORIES; ++m ) {
memories.emplace_back(mem_base);
}
// dump all possible information
// print_system_config();
// print csv header ... currently not nice
fprintf(stderr, "TimeStamp,Value,Guess,ERep,SRep");
ExperimentConfig::print_header();
print_fields('R');
print_fields('I');
fprintf(stderr, "\n");
// distributions for the experiments
std::random_device rd;
std::uniform_int_distribution<uint8_t> dist_experiment(0, N_experiments - 1);
std::uniform_int_distribution<uint8_t> dist_memory(0, MEMORIES - 1);
printf("CORE AND SIBLING %d %d <- please check!\n", CORE, SIBLING);
for ( uint64_t index = 0; index < NUMBER_SAMPLES; ++index ) {
// print current iteration
fprintf(stdout, "\r%3zu/%3zu", index, NUMBER_SAMPLES);
fflush(stdout);
// select experiment and memory index
uint8_t exp = dist_experiment(rd);
uint8_t mem_index = dist_memory(rd);
ExperimentConfig const &c = experiments[exp];
Memory const & m = memories[mem_index];
// repeat random selected variables for REP times
for ( size_t experiment_rep = 0; experiment_rep < EXPERIMENT_REPEAT; ++experiment_rep ) {
// sample cache line fills
CLFillValue value = { c.v_fill, rd };
CLFillValue guess = { c.g_fill, rd };
// repeat random selected variables for REP times
for ( size_t sample_rep = 0; sample_rep < SAMPLE_REPEAT; ++sample_rep ) {
// perform differential measurement
test_data i = run(c, m, value, guess.invert());
test_data r = run(c, m, value, guess);
// write the sample
timestamp();
fprintf(stderr, ",%2lu,%2lu,%2lu,%2lu", value.seed, guess.seed, experiment_rep, sample_rep);
c.print_config(mem_index);
print_data(r);
print_data(i);
fprintf(stderr, "\n");
}
}
}
printf("\n");
return 0;
}
static void meltdown_caller(uint8_t *p, ExperimentConfig const &config, uint64_t count) {
if ( config.instruction == Inst::STORE_MELTDOWN ) {
asm volatile("lfence");
asm volatile(" movq 0x1000(%%rdx), %%r8 \n" // save the guess values once
".align 64 \n"
"1: \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq %%r8, 0x1000(%%rdx) \n"
" movq %%r8, 0x3000(%%rdx) \n"
" movq %%r8, 0x4000(%%rdx) \n"
" movq %%r8, 0x5000(%%rdx) \n"
" movq %%r8, 0x9000(%%rdx) \n"
" movq %%r8, 0xa000(%%rdx) \n"
" movq %%r8, 0xb000(%%rdx) \n"
" movq %%r8, 0xc000(%%rdx) \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq %%r8, 0x6000(%%rdx) \n"
" movq %%r8, 0x7000(%%rdx) \n"
" movq %%r8, 0x8000(%%rdx) \n"
" movq %%r8, 0x11000(%%rdx) \n"
" movq %%r8, 0xd000(%%rdx) \n"
" movq %%r8, 0xe000(%%rdx) \n"
" movq %%r8, 0xf000(%%rdx) \n"
" movq %%r8, 0x10000(%%rdx) \n"
" dec %[count] \n"
" jnz 1b \n"
:
: [ nr ] "i"(__NR_ioctl), "D"(fd), "S"(SYSCALL_TYPE), "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "memory", "flags");
}
else {
if ( config.eviction == Evict::NONE ) {
asm volatile("lfence");
asm volatile(".align 64 \n"
"1: \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq 0x1000(%%rdx), %%r8 \n"
" movq 0x3100(%%rdx), %%r9 \n"
" movq 0x4180(%%rdx), %%r10 \n"
" movq 0x5200(%%rdx), %%r11 \n"
" movq 0x9400(%%rdx), %%r12 \n"
" movq 0xa480(%%rdx), %%r13 \n"
" movq 0xb500(%%rdx), %%r14 \n"
" movq 0xc580(%%rdx), %%r15 \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq 0x6280(%%rdx), %%r8 \n"
" movq 0x7300(%%rdx), %%r9 \n"
" movq 0x8380(%%rdx), %%r10 \n"
" movq 0x11800(%%rdx), %%r11 \n"
" movq 0xd600(%%rdx), %%r12 \n"
" movq 0xe680(%%rdx), %%r13 \n"
" movq 0xf700(%%rdx), %%r14 \n"
" movq 0x10780(%%rdx), %%r15 \n"
" dec %[count] \n"
" jnz 1b \n"
:
: [ nr ] "i"(__NR_ioctl), "D"(fd), "S"(SYSCALL_TYPE), "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "memory", "flags");
}
else {
asm volatile("lfence");
asm volatile(".align 64 \n"
"1: \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq 0x1000(%%rdx), %%r8 \n"
" movq 0x3000(%%rdx), %%r9 \n"
" movq 0x4000(%%rdx), %%r10 \n"
" movq 0x5000(%%rdx), %%r11 \n"
" movq 0x9000(%%rdx), %%r12 \n"
" movq 0xa000(%%rdx), %%r13 \n"
" movq 0xb000(%%rdx), %%r14 \n"
" movq 0xc000(%%rdx), %%r15 \n"
" mov %[nr], %%eax \n"
" syscall \n" // will perform movq 0x2000(%%rdx), %%xx
" movq 0x6000(%%rdx), %%r8 \n"
" movq 0x7000(%%rdx), %%r9 \n"
" movq 0x8000(%%rdx), %%r10 \n"
" movq 0x11000(%%rdx), %%r11 \n"
" movq 0xd000(%%rdx), %%r12 \n"
" movq 0xe000(%%rdx), %%r13 \n"
" movq 0xf000(%%rdx), %%r14 \n"
" movq 0x10000(%%rdx), %%r15 \n"
" dec %[count] \n"
" jnz 1b \n"
:
: [ nr ] "i"(__NR_ioctl), "D"(fd), "S"(SYSCALL_TYPE), "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "memory", "flags");
}
}
}
template<typename Prepare_t, typename Task_t>
static std::vector<int> fork_background_task(size_t n_cores, Prepare_t prepare, Task_t task) {
// NOTE: this is not the best solution as std::atomic, could not work over shared memory, but for uint64_t it should be lockless anyway.
static_assert(std::atomic<uint64_t>::is_always_lock_free);
// allocate shared memory
std::atomic<uint64_t> *mem = (std::atomic<uint64_t> *)mmap(nullptr, 0x1000, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_ANONYMOUS, -1, 0);
// init the sync variable
std::atomic<uint64_t> *control = new (mem) std::atomic<uint64_t> { 0 };
// pids
std::vector<int> pids = {};
pids.reserve(n_cores);
// fork and invoke the function
for ( uint8_t i = 0; i < n_cores; ++i ) {
int pid = fork();
if ( pid == 0 ) {
prepare(i + 1);
(*control)++;
task(i + 1);
exit(0);
}
else {
pids.push_back(pid);
}
}
while ( control->load() != (n_cores) ) {
sched_yield();
}
// unmap shared control
control->~atomic<uint64_t>();
munmap(mem, 0x1000);
return pids;
}
static void join_pids(std::vector<int> const &pids) {
for ( auto pid : pids ) {
kill(pid, SIGKILL);
waitpid(pid, 0, 0);
}
}
[[gnu::noinline, gnu::aligned(0x1000)]] static test_data userspace_meltdown_experiment(ExperimentConfig const &config, uint8_t *target) {
if ( !(config.instruction == Inst::LOAD_MELTDOWN || config.instruction == Inst::STORE_MELTDOWN) ) {
assert(false);
printf("unkown case!\n");
exit(-1);
}
if ( config.instruction == Inst::STORE_MELTDOWN && config.eviction == Evict::NONE ) {
assert(false);
printf("not supported!\n");
exit(-1);
}
// we offset the target by one page so each load instruction is the same!
uint8_t *p = target - 0x1000;
// scale samples
uint64_t count = LOOPS * config.sample_scale;
// remove the victim page from the reach of the user
mark_user_accessible(p + 0x2000, false);
auto prepare = [&](uint8_t core_id) {
// pin to core
pin_core(core_id);
// force tlb entry
do_access(p);
do_access(p);
};
auto background_task = [&](int core_id) {
meltdown_caller(p, config, -1);
};
// if desired use multiple cores to amplify the leakage
auto pids = fork_background_task(AMPLIFICATION_CORES, prepare, background_task);
prepare(0);
// sync energy measurement
test_data start = measure();
while ( measure().energy == start.energy )
;
// start measuring
start = measure();
// invoke the victim loop
meltdown_caller(p, config, count);
// stop measuring
test_data end = measure();
// wait for the other processes to finish
join_pids(pids);
// bring the user mapping back
mark_user_accessible(p + 0x2000, true);
// store sample
test_data data;
memset(&data, 0, sizeof(test_data));
data.energy = end.energy - start.energy;
data.energy_pp0 = end.energy_pp0 - start.energy_pp0;
data.ticks = end.ticks - start.ticks;
return data;
}
[[gnu::noinline, gnu::aligned(0x1000)]] void mds_process(uint8_t *target) {
asm volatile(".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
"1: \n"
" movq 0x2000(%%rdx), %%r8 \n"
" jmp 1b \n"
:
: "d"(target)
: "rax", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15");
}
[[gnu::noinline, gnu::aligned(0x1000)]] static test_data userspace_mds_experiment(ExperimentConfig const &config, uint8_t *target) {
if ( !(config.instruction == Inst::LOAD_MDS || config.instruction == Inst::STORE_MDS) ) {
assert(false);
printf("unkown case!\n");
exit(-1);
}
if ( config.instruction == Inst::STORE_MDS && config.eviction == Evict::NONE ) {
assert(false);
printf("not supported!\n");
exit(-1);
}
bool do_stores = config.instruction == Inst::STORE_MDS;
// we offset the target by one page so each load instruction is the same!
uint8_t *p = target - 0x1000;
uint8_t *p_evict = p + (config.eviction == Evict::NONE ? 0x80 : 0);
auto prepare = [](uint8_t core_id) {
pin_core(SIBLING);
};
auto mds_thread = [=](uint8_t core_id) {
mds_process(p_evict);
};
// create the victim process
auto pids = fork_background_task(1, prepare, mds_thread);
// remove the victim page from the attacker process (in that vadr mapping)
munmap(p + 0x2000, 0x1000);
// will be mapped back in memory.h in get_memory
pin_core(CORE);
// scale samples
uint64_t count = LOOPS * config.sample_scale;
/*{
uint64_t *p = (uint64_t *)(target);
printf(" [0x%llx] = 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n", (uint64_t)p, p[0], p[1], p[2],
p[3], p[4], p[5], p[6], p[7]);
}*/
// sync energy measurement
test_data start = measure();
while ( measure().energy == start.energy )
;
start = measure();
if ( do_stores ) {
asm volatile("lfence");
asm volatile(" movq 0x1000(%%rdx), %%r8 \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
" nop \n"
".align 64 \n"
"1: \n"
" movq %%r8, 0x1000(%%rdx) \n"
" nop \n"
" movq %%r8, 0x3000(%%rdx) \n"
" movq %%r8, 0x4000(%%rdx) \n"
" movq %%r8, 0x5000(%%rdx) \n"
" movq %%r8, 0x6000(%%rdx) \n"
" movq %%r8, 0x7000(%%rdx) \n"
" movq %%r8, 0x8000(%%rdx) \n"
" movq %%r8, 0x9000(%%rdx) \n"
" movq %%r8, 0xa000(%%rdx) \n"
" movq %%r8, 0xb000(%%rdx) \n"
" movq %%r8, 0xc000(%%rdx) \n"
" movq %%r8, 0xd000(%%rdx) \n"
" movq %%r8, 0xe000(%%rdx) \n"
" movq %%r8, 0xf000(%%rdx) \n"
" movq %%r8, 0x10000(%%rdx) \n"
" dec %[count] \n"
" jnz 1b \n"
:
: "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "memory");
}
else {
if ( config.eviction == Evict::NONE ) {
asm volatile("lfence");
asm volatile(".align 64 \n"
"1: \n"
" movq 0x1000(%%rdx), %%r8 \n"
" nop \n"
" movq 0x3100(%%rdx), %%r10 \n"
" movq 0x4180(%%rdx), %%r11 \n"
" movq 0x5200(%%rdx), %%r12 \n"
" movq 0x6280(%%rdx), %%r13 \n"
" movq 0x7300(%%rdx), %%r14 \n"
" movq 0x8380(%%rdx), %%r15 \n"
" movq 0x9400(%%rdx), %%r8 \n"
" movq 0xa480(%%rdx), %%r9 \n"
" movq 0xb500(%%rdx), %%r10 \n"
" movq 0xc580(%%rdx), %%r11 \n"
" movq 0xd600(%%rdx), %%r12 \n"
" movq 0xe680(%%rdx), %%r13 \n"
" movq 0xf700(%%rdx), %%r14 \n"
" movq 0x10780(%%rdx), %%r15 \n"
" dec %[count] \n"
" jnz 1b \n"
:
: "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15");
}
else {
asm volatile("lfence");
asm volatile(".align 64 \n"
"1: \n"
" movq 0x1000(%%rdx), %%r8 \n"
" nop \n"
" movq 0x3000(%%rdx), %%r10 \n"
" movq 0x4000(%%rdx), %%r11 \n"
" movq 0x5000(%%rdx), %%r12 \n"
" movq 0x6000(%%rdx), %%r13 \n"
" movq 0x7000(%%rdx), %%r14 \n"
" movq 0x8000(%%rdx), %%r15 \n"
" movq 0x9000(%%rdx), %%r8 \n"
" movq 0xa000(%%rdx), %%r9 \n"
" movq 0xb000(%%rdx), %%r10 \n"
" movq 0xc000(%%rdx), %%r11 \n"
" movq 0xd000(%%rdx), %%r12 \n"
" movq 0xe000(%%rdx), %%r13 \n"
" movq 0xf000(%%rdx), %%r14 \n"
" movq 0x10000(%%rdx), %%r15 \n"
" dec %[count] \n"
" jnz 1b \n"
:
: "d"(p), [ count ] "r"(count)
: "rax", "rcx", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15");
}
}
test_data end = measure();
join_pids(pids);
test_data data;
memset(&data, 0, sizeof(test_data));
data.energy = end.energy - start.energy;
data.energy_pp0 = end.energy_pp0 - start.energy_pp0;
data.ticks = end.ticks - start.ticks;
return data;
}
[[gnu::noinline]] static test_data kernel_experiment(ExperimentConfig const &config, uint8_t *target) {
unsigned long cmd = 0;
pin_core(CORE);
switch ( config.instruction ) {
case Inst::LOAD:
cmd = config.eviction == Evict::NONE ? TEST_LOAD_NO_EVICT : TEST_LOAD_L1_EVICT;
break;
case Inst::PREFETCH:
cmd = config.eviction == Evict::NONE ? TEST_PREFETCH_NO_EVICT : TEST_PREFETCH_L1_EVICT;
break;
case Inst::STORE:
cmd = config.eviction == Evict::NONE ? TEST_STORE_NO_EVICT : TEST_STORE_L1_EVICT;
break;
default:
printf("unkown case!\n");
exit(-1);
}
test_data data;
memset(&data, 0, sizeof(test_data));
data.address = (__u64)target;
data.count = LOOPS * config.sample_scale;
if ( ioctl(fd, cmd, &data) < 0 ) {
printf("ioctl error\n");
exit(-1);
}
return data;
}