xen-project/xen
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kexec, kimage: convert kexec and kimage to use typesafe mfn_t

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At the same time, correctly align one the prototype changed.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
This commit is contained in:
Julien Grall authored and Jan Beulich committed 2017-10-09 13:25:53 +02:00
1 parent 5d4cf4f350
commit e7c9678259
3 files changed
+28 -22
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xen/common/kexec.c
+8 -8
View File
@@ -905,11 +905,11 @@ static uint16_t kexec_load_v1_arch(void)
#endif
}
static int kexec_segments_add_segment(
unsigned int *nr_segments, xen_kexec_segment_t *segments,
unsigned long mfn)
static int kexec_segments_add_segment(unsigned int *nr_segments,
xen_kexec_segment_t *segments,
mfn_t mfn)
{
paddr_t maddr = (paddr_t)mfn << PAGE_SHIFT;
paddr_t maddr = mfn_to_maddr(mfn);
unsigned int n = *nr_segments;
/* Need a new segment? */
@@ -930,7 +930,7 @@ static int kexec_segments_add_segment(
return 0;
}
static int kexec_segments_from_ind_page(unsigned long mfn,
static int kexec_segments_from_ind_page(mfn_t mfn,
unsigned int *nr_segments,
xen_kexec_segment_t *segments,
bool_t compat)
@@ -939,7 +939,7 @@ static int kexec_segments_from_ind_page(unsigned long mfn,
kimage_entry_t *entry;
int ret = 0;
page = map_domain_page(_mfn(mfn));
page = map_domain_page(mfn);
/*
* Walk the indirection page list, adding destination pages to the
@@ -961,7 +961,7 @@ static int kexec_segments_from_ind_page(unsigned long mfn,
break;
case IND_INDIRECTION:
unmap_domain_page(page);
entry = page = map_domain_page(_mfn(mfn));
entry = page = map_domain_page(mfn);
continue;
case IND_DONE:
goto done;
@@ -990,7 +990,7 @@ static int kexec_do_load_v1(xen_kexec_load_v1_t *load, int compat)
xen_kexec_segment_t *segments;
uint16_t arch;
unsigned int nr_segments = 0;
unsigned long ind_mfn = load->image.indirection_page >> PAGE_SHIFT;
mfn_t ind_mfn = maddr_to_mfn(load->image.indirection_page);
int ret;
arch = kexec_load_v1_arch();
xen/common/kimage.c
+18 -12
View File
@@ -23,6 +23,12 @@
#include <asm/page.h>
/* Override macros from asm/page.h to make them work with mfn_t */
#undef mfn_to_page
#define mfn_to_page(mfn) __mfn_to_page(mfn_x(mfn))
#undef page_to_mfn
#define page_to_mfn(pg) _mfn(__page_to_mfn(pg))
/*
* When kexec transitions to the new kernel there is a one-to-one
* mapping between physical and virtual addresses. On processors
@@ -76,7 +82,7 @@ static struct page_info *kimage_alloc_zeroed_page(unsigned memflags)
if ( !page )
return NULL;
clear_domain_page(_mfn(page_to_mfn(page)));
clear_domain_page(page_to_mfn(page));
return page;
}
@@ -405,7 +411,7 @@ static struct page_info *kimage_alloc_crash_control_page(struct kexec_image *ima
if ( page )
{
image->next_crash_page = hole_end;
clear_domain_page(_mfn(page_to_mfn(page)));
clear_domain_page(page_to_mfn(page));
}
return page;
@@ -641,7 +647,7 @@ static struct page_info *kimage_alloc_page(struct kexec_image *image,
*old = (addr & ~PAGE_MASK) | IND_SOURCE;
unmap_domain_page(old);
page = mfn_to_page(mfn_x(old_mfn));
page = mfn_to_page(old_mfn);
break;
}
else
@@ -840,11 +846,11 @@ kimage_entry_t *kimage_entry_next(kimage_entry_t *entry, bool_t compat)
return entry + 1;
}
unsigned long kimage_entry_mfn(kimage_entry_t *entry, bool_t compat)
mfn_t kimage_entry_mfn(kimage_entry_t *entry, bool_t compat)
{
if ( compat )
return *(uint32_t *)entry >> PAGE_SHIFT;
return *entry >> PAGE_SHIFT;
return maddr_to_mfn(*(uint32_t *)entry);
return maddr_to_mfn(*entry);
}
unsigned long kimage_entry_ind(kimage_entry_t *entry, bool_t compat)
@@ -854,7 +860,7 @@ unsigned long kimage_entry_ind(kimage_entry_t *entry, bool_t compat)
return *entry & 0xf;
}
int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
int kimage_build_ind(struct kexec_image *image, mfn_t ind_mfn,
bool_t compat)
{
void *page;
@@ -862,7 +868,7 @@ int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
int ret = 0;
paddr_t dest = KIMAGE_NO_DEST;
page = map_domain_page(_mfn(ind_mfn));
page = map_domain_page(ind_mfn);
if ( !page )
return -ENOMEM;
@@ -873,7 +879,7 @@ int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
for ( entry = page; ; )
{
unsigned long ind;
unsigned long mfn;
mfn_t mfn;
ind = kimage_entry_ind(entry, compat);
mfn = kimage_entry_mfn(entry, compat);
@@ -881,14 +887,14 @@ int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
switch ( ind )
{
case IND_DESTINATION:
dest = (paddr_t)mfn << PAGE_SHIFT;
dest = mfn_to_maddr(mfn);
ret = kimage_set_destination(image, dest);
if ( ret < 0 )
goto done;
break;
case IND_INDIRECTION:
unmap_domain_page(page);
page = map_domain_page(_mfn(mfn));
page = map_domain_page(mfn);
entry = page;
continue;
case IND_DONE:
@@ -913,7 +919,7 @@ int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
goto done;
}
copy_domain_page(_mfn(page_to_mfn(xen_page)), _mfn(mfn));
copy_domain_page(page_to_mfn(xen_page), mfn);
put_page(guest_page);
ret = kimage_add_page(image, page_to_maddr(xen_page));
xen/include/xen/kimage.h
+2 -2
View File
@@ -48,9 +48,9 @@ struct page_info *kimage_alloc_control_page(struct kexec_image *image,
unsigned memflags);
kimage_entry_t *kimage_entry_next(kimage_entry_t *entry, bool_t compat);
unsigned long kimage_entry_mfn(kimage_entry_t *entry, bool_t compat);
mfn_t kimage_entry_mfn(kimage_entry_t *entry, bool_t compat);
unsigned long kimage_entry_ind(kimage_entry_t *entry, bool_t compat);
int kimage_build_ind(struct kexec_image *image, unsigned long ind_mfn,
int kimage_build_ind(struct kexec_image *image, mfn_t ind_mfn,
bool_t compat);
#endif /* __ASSEMBLY__ */
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