Re: [PATCHv2] x86: EFI stub support for large memory maps
On Tue, Sep 17, 2013 at 09:14:52PM +0100, Matt Fleming wrote:
> > +static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
> > + u32 *e820ext_size)
> > +{
> > + efi_status_t status;
> > + unsigned long size;
> > +
> > + size = sizeof(struct setup_data) +
> > + sizeof(struct e820entry) * nr_desc;
> > +
> > + if (*e820ext && size <= *e820ext_size)
> > + return EFI_SUCCESS; /* Already allocated */
>
> Do we actually need this check? I thought the 'prev_nr_desc' below
> ensures we only allocate 'e820ext' if we need more memory.
I am okay with removing the check. There is another bug in exit_boot, when
jumping to get_map the call to get the memory map is passed the previous map
size instead of the size of the allocated buffer. I'll make the changes and
resend.
>
> [...]
>
> > @@ -1016,6 +1157,19 @@ get_map:
> > if (status != EFI_SUCCESS)
> > goto free_mem_map;
> >
> > + prev_nr_desc = nr_desc;
> > + nr_desc = size / desc_size;
> > + if (nr_desc > prev_nr_desc &&
> > + nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
> > + u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
> > +
> > + status = alloc_e820ext(nr_e820ext, , _size);
> > + if (status != EFI_SUCCESS)
> > + goto free_mem_map;
> > +
> > + goto get_map; /* Allocated memory, get map again */
> > + }
> > +
--
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Re: [PATCHv2] x86: EFI stub support for large memory maps
On Tue, Sep 17, 2013 at 09:14:52PM +0100, Matt Fleming wrote:
+static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
+ u32 *e820ext_size)
+{
+ efi_status_t status;
+ unsigned long size;
+
+ size = sizeof(struct setup_data) +
+ sizeof(struct e820entry) * nr_desc;
+
+ if (*e820ext size = *e820ext_size)
+ return EFI_SUCCESS; /* Already allocated */
Do we actually need this check? I thought the 'prev_nr_desc' below
ensures we only allocate 'e820ext' if we need more memory.
I am okay with removing the check. There is another bug in exit_boot, when
jumping to get_map the call to get the memory map is passed the previous map
size instead of the size of the allocated buffer. I'll make the changes and
resend.
[...]
@@ -1016,6 +1157,19 @@ get_map:
if (status != EFI_SUCCESS)
goto free_mem_map;
+ prev_nr_desc = nr_desc;
+ nr_desc = size / desc_size;
+ if (nr_desc prev_nr_desc
+ nr_desc ARRAY_SIZE(boot_params-e820_map)) {
+ u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params-e820_map);
+
+ status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size);
+ if (status != EFI_SUCCESS)
+ goto free_mem_map;
+
+ goto get_map; /* Allocated memory, get map again */
+ }
+
--
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Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCHv2] x86: EFI stub support for large memory maps
On Fri, 06 Sep, at 11:04:16AM, Linn Crosetto wrote:
> This patch fixes a problem with EFI memory maps larger than 128 entries
> when booting using the EFI stub, which results in overflowing e820_map
> in boot_params and an eventual halt when checking the map size in
> sanitize_e820_map().
>
> If the number of map entries is greater than what can fit in e820_map,
> add the extra entries to the setup_data list using type SETUP_E820_EXT.
> These extra entries are then picked up when the setup_data list is
> parsed in parse_e820_ext().
>
> Signed-off-by: Linn Crosetto
> ---
> Changes in v2:
> * Free memory when error is returned from alloc_e820ext() as suggested by Matt
> Fleming
> * Set pointer to NULL and size to 0 after freeing memory in alloc_e820ext()
>
> arch/x86/boot/compressed/eboot.c | 223
> ---
> 1 file changed, 160 insertions(+), 63 deletions(-)
[...]
> +static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
> + u32 *e820ext_size)
> +{
> + efi_status_t status;
> + unsigned long size;
> +
> + size = sizeof(struct setup_data) +
> + sizeof(struct e820entry) * nr_desc;
> +
> + if (*e820ext && size <= *e820ext_size)
> + return EFI_SUCCESS; /* Already allocated */
Do we actually need this check? I thought the 'prev_nr_desc' below
ensures we only allocate 'e820ext' if we need more memory.
[...]
> @@ -1016,6 +1157,19 @@ get_map:
> if (status != EFI_SUCCESS)
> goto free_mem_map;
>
> + prev_nr_desc = nr_desc;
> + nr_desc = size / desc_size;
> + if (nr_desc > prev_nr_desc &&
> + nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
> + u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
> +
> + status = alloc_e820ext(nr_e820ext, , _size);
> + if (status != EFI_SUCCESS)
> + goto free_mem_map;
> +
> + goto get_map; /* Allocated memory, get map again */
> + }
> +
--
Matt Fleming, Intel Open Source Technology Center
--
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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCHv2] x86: EFI stub support for large memory maps
On Fri, 06 Sep, at 11:04:16AM, Linn Crosetto wrote:
This patch fixes a problem with EFI memory maps larger than 128 entries
when booting using the EFI stub, which results in overflowing e820_map
in boot_params and an eventual halt when checking the map size in
sanitize_e820_map().
If the number of map entries is greater than what can fit in e820_map,
add the extra entries to the setup_data list using type SETUP_E820_EXT.
These extra entries are then picked up when the setup_data list is
parsed in parse_e820_ext().
Signed-off-by: Linn Crosetto l...@hp.com
---
Changes in v2:
* Free memory when error is returned from alloc_e820ext() as suggested by Matt
Fleming
* Set pointer to NULL and size to 0 after freeing memory in alloc_e820ext()
arch/x86/boot/compressed/eboot.c | 223
---
1 file changed, 160 insertions(+), 63 deletions(-)
[...]
+static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
+ u32 *e820ext_size)
+{
+ efi_status_t status;
+ unsigned long size;
+
+ size = sizeof(struct setup_data) +
+ sizeof(struct e820entry) * nr_desc;
+
+ if (*e820ext size = *e820ext_size)
+ return EFI_SUCCESS; /* Already allocated */
Do we actually need this check? I thought the 'prev_nr_desc' below
ensures we only allocate 'e820ext' if we need more memory.
[...]
@@ -1016,6 +1157,19 @@ get_map:
if (status != EFI_SUCCESS)
goto free_mem_map;
+ prev_nr_desc = nr_desc;
+ nr_desc = size / desc_size;
+ if (nr_desc prev_nr_desc
+ nr_desc ARRAY_SIZE(boot_params-e820_map)) {
+ u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params-e820_map);
+
+ status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size);
+ if (status != EFI_SUCCESS)
+ goto free_mem_map;
+
+ goto get_map; /* Allocated memory, get map again */
+ }
+
--
Matt Fleming, Intel Open Source Technology Center
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCHv2] x86: EFI stub support for large memory maps
This patch fixes a problem with EFI memory maps larger than 128 entries
when booting using the EFI stub, which results in overflowing e820_map
in boot_params and an eventual halt when checking the map size in
sanitize_e820_map().
If the number of map entries is greater than what can fit in e820_map,
add the extra entries to the setup_data list using type SETUP_E820_EXT.
These extra entries are then picked up when the setup_data list is
parsed in parse_e820_ext().
Signed-off-by: Linn Crosetto
---
Changes in v2:
* Free memory when error is returned from alloc_e820ext() as suggested by Matt
Fleming
* Set pointer to NULL and size to 0 after freeing memory in alloc_e820ext()
arch/x86/boot/compressed/eboot.c | 223 ---
1 file changed, 160 insertions(+), 63 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index b7388a4..2ac395e 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -982,20 +982,161 @@ fail:
return NULL;
}
+static void add_e820ext(struct boot_params *params,
+ struct setup_data *e820ext, u32 nr_entries)
+{
+ struct setup_data *data;
+ efi_status_t status;
+ unsigned long size;
+
+ e820ext->type = SETUP_E820_EXT;
+ e820ext->len = nr_entries * sizeof(struct e820entry);
+ e820ext->next = 0;
+
+ data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
+
+ while (data && data->next)
+ data = (struct setup_data *)(unsigned long)data->next;
+
+ if (data)
+ data->next = (unsigned long)e820ext;
+ else
+ params->hdr.setup_data = (unsigned long)e820ext;
+}
+
+static efi_status_t setup_e820(struct boot_params *params,
+ struct setup_data *e820ext, u32 e820ext_size)
+{
+ struct e820entry *e820_map = >e820_map[0];
+ struct efi_info *efi = >efi_info;
+ struct e820entry *prev = NULL;
+ u32 nr_entries;
+ u32 nr_desc;
+ int i;
+
+ nr_entries = 0;
+ nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
+
+ for (i = 0; i < nr_desc; i++) {
+ efi_memory_desc_t *d;
+ unsigned int e820_type = 0;
+ unsigned long m = efi->efi_memmap;
+
+ d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
+ switch (d->type) {
+ case EFI_RESERVED_TYPE:
+ case EFI_RUNTIME_SERVICES_CODE:
+ case EFI_RUNTIME_SERVICES_DATA:
+ case EFI_MEMORY_MAPPED_IO:
+ case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+ case EFI_PAL_CODE:
+ e820_type = E820_RESERVED;
+ break;
+
+ case EFI_UNUSABLE_MEMORY:
+ e820_type = E820_UNUSABLE;
+ break;
+
+ case EFI_ACPI_RECLAIM_MEMORY:
+ e820_type = E820_ACPI;
+ break;
+
+ case EFI_LOADER_CODE:
+ case EFI_LOADER_DATA:
+ case EFI_BOOT_SERVICES_CODE:
+ case EFI_BOOT_SERVICES_DATA:
+ case EFI_CONVENTIONAL_MEMORY:
+ e820_type = E820_RAM;
+ break;
+
+ case EFI_ACPI_MEMORY_NVS:
+ e820_type = E820_NVS;
+ break;
+
+ default:
+ continue;
+ }
+
+ /* Merge adjacent mappings */
+ if (prev && prev->type == e820_type &&
+ (prev->addr + prev->size) == d->phys_addr) {
+ prev->size += d->num_pages << 12;
+ continue;
+ }
+
+ if (nr_entries == ARRAY_SIZE(params->e820_map)) {
+ u32 need = (nr_desc - i) * sizeof(struct e820entry) +
+ sizeof(struct setup_data);
+
+ if (!e820ext || e820ext_size < need)
+ return EFI_BUFFER_TOO_SMALL;
+
+ /* boot_params map full, switch to e820 extended */
+ e820_map = (struct e820entry *)e820ext->data;
+ }
+
+ e820_map->addr = d->phys_addr;
+ e820_map->size = d->num_pages << PAGE_SHIFT;
+ e820_map->type = e820_type;
+ prev = e820_map++;
+ nr_entries++;
+ }
+
+ if (nr_entries > ARRAY_SIZE(params->e820_map)) {
+ u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
+
+ add_e820ext(params, e820ext, nr_e820ext);
+ nr_entries -= nr_e820ext;
+ }
+
+ params->e820_entries = (u8)nr_entries;
+
+ return EFI_SUCCESS;
+}
+
+static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
+
[PATCHv2] x86: EFI stub support for large memory maps
This patch fixes a problem with EFI memory maps larger than 128 entries
when booting using the EFI stub, which results in overflowing e820_map
in boot_params and an eventual halt when checking the map size in
sanitize_e820_map().
If the number of map entries is greater than what can fit in e820_map,
add the extra entries to the setup_data list using type SETUP_E820_EXT.
These extra entries are then picked up when the setup_data list is
parsed in parse_e820_ext().
Signed-off-by: Linn Crosetto l...@hp.com
---
Changes in v2:
* Free memory when error is returned from alloc_e820ext() as suggested by Matt
Fleming
* Set pointer to NULL and size to 0 after freeing memory in alloc_e820ext()
arch/x86/boot/compressed/eboot.c | 223 ---
1 file changed, 160 insertions(+), 63 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index b7388a4..2ac395e 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -982,20 +982,161 @@ fail:
return NULL;
}
+static void add_e820ext(struct boot_params *params,
+ struct setup_data *e820ext, u32 nr_entries)
+{
+ struct setup_data *data;
+ efi_status_t status;
+ unsigned long size;
+
+ e820ext-type = SETUP_E820_EXT;
+ e820ext-len = nr_entries * sizeof(struct e820entry);
+ e820ext-next = 0;
+
+ data = (struct setup_data *)(unsigned long)params-hdr.setup_data;
+
+ while (data data-next)
+ data = (struct setup_data *)(unsigned long)data-next;
+
+ if (data)
+ data-next = (unsigned long)e820ext;
+ else
+ params-hdr.setup_data = (unsigned long)e820ext;
+}
+
+static efi_status_t setup_e820(struct boot_params *params,
+ struct setup_data *e820ext, u32 e820ext_size)
+{
+ struct e820entry *e820_map = params-e820_map[0];
+ struct efi_info *efi = params-efi_info;
+ struct e820entry *prev = NULL;
+ u32 nr_entries;
+ u32 nr_desc;
+ int i;
+
+ nr_entries = 0;
+ nr_desc = efi-efi_memmap_size / efi-efi_memdesc_size;
+
+ for (i = 0; i nr_desc; i++) {
+ efi_memory_desc_t *d;
+ unsigned int e820_type = 0;
+ unsigned long m = efi-efi_memmap;
+
+ d = (efi_memory_desc_t *)(m + (i * efi-efi_memdesc_size));
+ switch (d-type) {
+ case EFI_RESERVED_TYPE:
+ case EFI_RUNTIME_SERVICES_CODE:
+ case EFI_RUNTIME_SERVICES_DATA:
+ case EFI_MEMORY_MAPPED_IO:
+ case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+ case EFI_PAL_CODE:
+ e820_type = E820_RESERVED;
+ break;
+
+ case EFI_UNUSABLE_MEMORY:
+ e820_type = E820_UNUSABLE;
+ break;
+
+ case EFI_ACPI_RECLAIM_MEMORY:
+ e820_type = E820_ACPI;
+ break;
+
+ case EFI_LOADER_CODE:
+ case EFI_LOADER_DATA:
+ case EFI_BOOT_SERVICES_CODE:
+ case EFI_BOOT_SERVICES_DATA:
+ case EFI_CONVENTIONAL_MEMORY:
+ e820_type = E820_RAM;
+ break;
+
+ case EFI_ACPI_MEMORY_NVS:
+ e820_type = E820_NVS;
+ break;
+
+ default:
+ continue;
+ }
+
+ /* Merge adjacent mappings */
+ if (prev prev-type == e820_type
+ (prev-addr + prev-size) == d-phys_addr) {
+ prev-size += d-num_pages 12;
+ continue;
+ }
+
+ if (nr_entries == ARRAY_SIZE(params-e820_map)) {
+ u32 need = (nr_desc - i) * sizeof(struct e820entry) +
+ sizeof(struct setup_data);
+
+ if (!e820ext || e820ext_size need)
+ return EFI_BUFFER_TOO_SMALL;
+
+ /* boot_params map full, switch to e820 extended */
+ e820_map = (struct e820entry *)e820ext-data;
+ }
+
+ e820_map-addr = d-phys_addr;
+ e820_map-size = d-num_pages PAGE_SHIFT;
+ e820_map-type = e820_type;
+ prev = e820_map++;
+ nr_entries++;
+ }
+
+ if (nr_entries ARRAY_SIZE(params-e820_map)) {
+ u32 nr_e820ext = nr_entries - ARRAY_SIZE(params-e820_map);
+
+ add_e820ext(params, e820ext, nr_e820ext);
+ nr_entries -= nr_e820ext;
+ }
+
+ params-e820_entries = (u8)nr_entries;
+
+ return EFI_SUCCESS;
+}
+
+static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
+ u32 *e820ext_size)
