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Tofu: initial version

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Change-Id: I9c464d5af883c18715a97ca9e9981cf73b260f90
This commit is contained in:
Balazs Gerofi
2020-06-15 20:52:02 +09:00
committed by Masamichi Takagi
parent fe83deb3db
commit 92902d36fc
39 changed files with 4181 additions and 26 deletions
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48
executer/kernel/mcctrl/syscall.c
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@@ -45,6 +45,7 @@
#include <linux/mount.h>
#include <linux/kdev_t.h>
#include <linux/hugetlb.h>
#include <linux/proc_fs.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/io.h>
@@ -52,6 +53,7 @@
#include "mcctrl.h"
#include <linux/version.h>
#include <archdeps.h>
#include <asm/pgtable.h>
#define ALIGN_WAIT_BUF(z) (((z + 63) >> 6) << 6)
@@ -1869,6 +1871,52 @@ void __return_syscall(ihk_os_t os, struct ikc_scd_packet *packet,
res->ret = ret;
res->stid = stid;
#ifdef ENABLE_TOFU
/* Record PDE_DATA after ioctl() calls for Tofu driver */
if (packet->req.number == __NR_ioctl && ret == 0) {
char *pathbuf, *fullpath;
struct fd f = fdget(packet->req.args[0]);
if (!f.file) {
goto out_notify;
}
pathbuf = kmalloc(PATH_MAX, GFP_ATOMIC);
if (!pathbuf) {
goto out_fdput;
}
fullpath = d_path(&f.file->f_path, pathbuf, PATH_MAX);
if (IS_ERR(fullpath)) {
goto out_free;
}
if (!strncmp("/proc/tofu/dev/", fullpath, 15)) {
res->pde_data = PDE_DATA(file_inode(f.file));
printk("%s: fd: %ld, path: %s, PDE_DATA: 0x%lx\n",
__func__,
packet->req.args[0],
fullpath,
(unsigned long)res->pde_data);
printk("%s: pgd_index: %ld, pmd_index: %ld, pte_index: %ld\n",
__func__,
pgd_index((unsigned long)res->pde_data),
pmd_index((unsigned long)res->pde_data),
pte_index((unsigned long)res->pde_data));
#ifdef CONFIG_ARM64
printk("CONFIG_ARM64_VA_BITS: %d, PGDIR_SHIFT: %d\n",
CONFIG_ARM64_VA_BITS, PGDIR_SHIFT);
#endif
}
out_free:
kfree(pathbuf);
out_fdput:
fdput(f);
}
out_notify:
#endif
if (__notify_syscall_requester(os, packet, res) < 0) {
printk("%s: WARNING: failed to notify PID %d\n",
__FUNCTION__, packet->pid);