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support vdso which borrows clocksource from linux

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This commit is contained in:
NAKAMURA Gou
2016-03-28 14:42:49 +09:00
parent a587c8f5e5
commit 41bb2ab5e6
17 changed files with 689 additions and 18 deletions
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156
executer/kernel/mcctrl/arch/x86_64/archdeps.c
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@@ -2,6 +2,58 @@
#include "../../config.h"
#include "../../mcctrl.h"
#ifdef MCCTRL_KSYM_vdso_image_64
#if MCCTRL_KSYM_vdso_image_64
struct vdso_image *vdso_image = (void *)MCCTRL_KSYM_vdso_image_64;
#endif
#endif
#ifdef MCCTRL_KSYM_vdso_start
#if MCCTRL_KSYM_vdso_start
void *vdso_start = (void *)MCCTRL_KSYM_vdso_start;
#endif
#endif
#ifdef MCCTRL_KSYM_vdso_end
#if MCCTRL_KSYM_vdso_end
void *vdso_end = (void *)MCCTRL_KSYM_vdso_end;
#endif
#endif
#ifdef MCCTRL_KSYM_vdso_pages
#if MCCTRL_KSYM_vdso_pages
struct page **vdso_pages = (void *)MCCTRL_KSYM_vdso_pages;
#endif
#endif
#ifdef MCCTRL_KSYM___vvar_page
#if MCCTRL_KSYM___vvar_page
void *__vvar_page = (void *)MCCTRL_KSYM___vvar_page;
#endif
#endif
long *hpet_addressp
#ifdef MCCTRL_KSYM_hpet_address
#if MCCTRL_KSYM_hpet_address
= (void *)MCCTRL_KSYM_hpet_address;
#else
= &hpet_address;
#endif
#else
= NULL;
#endif
void **hv_clockp
#ifdef MCCTRL_KSYM_hv_clock
#if MCCTRL_KSYM_hv_clock
= (void *)MCCTRL_KSYM_hv_clock;
#else
= &hv_clock;
#endif
#else
= NULL;
#endif
unsigned long
reserve_user_space_common(struct mcctrl_usrdata *usrdata, unsigned long start, unsigned long end);
@@ -36,3 +88,107 @@ reserve_user_space(struct mcctrl_usrdata *usrdata, unsigned long *startp, unsign
*endp = end;
return 0;
}
void get_vdso_info(ihk_os_t os, long vdso_rpa)
{
ihk_device_t dev = ihk_os_to_dev(os);
long vdso_pa;
struct vdso *vdso;
size_t size;
int i;
vdso_pa = ihk_device_map_memory(dev, vdso_rpa, sizeof(*vdso));
vdso = ihk_device_map_virtual(dev, vdso_pa, sizeof(*vdso), NULL, 0);
memset(vdso, 0, sizeof(*vdso));
/* VDSO pages */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
size = vdso_image->size;
vdso->vdso_npages = size >> PAGE_SHIFT;
if (vdso->vdso_npages > VDSO_MAXPAGES) {
vdso->vdso_npages = 0;
goto out;
}
for (i = 0; i < vdso->vdso_npages; ++i) {
vdso->vdso_physlist[i] = virt_to_phys(
vdso_image->data + (i * PAGE_SIZE));
}
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
size = vdso_end - vdso_start;
size = (size + PAGE_SIZE - 1) & PAGE_MASK;
vdso->vdso_npages = size >> PAGE_SHIFT;
if (vdso->vdso_npages > VDSO_MAXPAGES) {
vdso->vdso_npages = 0;
goto out;
}
for (i = 0; i < vdso->vdso_npages; ++i) {
vdso->vdso_physlist[i] = page_to_phys(vdso_pages[i]);
}
#endif
/* VVAR page */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0)
vdso->vvar_is_global = 0;
vdso->vvar_virt = -3 * PAGE_SIZE;
vdso->vvar_phys = virt_to_phys(__vvar_page);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
vdso->vvar_is_global = 0;
vdso->vvar_virt = -2 * PAGE_SIZE;
vdso->vvar_phys = virt_to_phys(__vvar_page);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
vdso->vvar_is_global = 0;
vdso->vvar_virt = (void *)(vdso->vdso_npages * PAGE_SIZE);
vdso->vvar_phys = virt_to_phys(__vvar_page);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
vdso->vvar_is_global = 1;
vdso->vvar_virt = (void *)fix_to_virt(VVAR_PAGE);
vdso->vvar_phys = virt_to_phys(__vvar_page);
#endif
/* HPET page */
if (hpet_addressp && *hpet_addressp) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0)
vdso->hpet_is_global = 0;
vdso->hpet_virt = -2 * PAGE_SIZE;
vdso->hpet_phys = *hpet_addressp;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
vdso->hpet_is_global = 0;
vdso->hpet_virt = -1 * PAGE_SIZE;
vdso->hpet_phys = *hpet_addressp;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
vdso->hpet_is_global = 0;
vdso->hpet_virt = (void *)((vdso->vdso_npages + 1) * PAGE_SIZE);
vdso->hpet_phys = *hpet_addressp;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
vdso->hpet_is_global = 1;
vdso->hpet_virt = (void *)fix_to_virt(VSYSCALL_HPET);
vdso->hpet_phys = *hpet_addressp;
#endif
}
/* struct pvlock_vcpu_time_info table */
if (hv_clockp && *hv_clockp) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0)
vdso->pvti_is_global = 0;
vdso->pvti_virt = -1 * PAGE_SIZE;
vdso->pvti_phys = virt_to_phys(*hv_clockp);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
vdso->pvti_is_global = 1;
vdso->pvti_virt = (void *)fix_to_virt(PVCLOCK_FIXMAP_BEGIN);
vdso->pvti_phys = virt_to_phys(*hv_clockp);
#endif
}
out:
wmb();
vdso->busy = 0;
ihk_device_unmap_virtual(dev, vdso, sizeof(*vdso));
ihk_device_unmap_memory(dev, vdso_pa, sizeof(*vdso));
return;
} /* get_vdso_info() */