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path: root/drivers/firmware/efi
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Diffstat (limited to 'drivers/firmware/efi')
-rw-r--r--drivers/firmware/efi/Kconfig9
-rw-r--r--drivers/firmware/efi/arm-runtime.c16
-rw-r--r--drivers/firmware/efi/capsule-loader.c117
-rw-r--r--drivers/firmware/efi/capsule.c11
-rw-r--r--drivers/firmware/efi/efi.c3
-rw-r--r--drivers/firmware/efi/test/efi_test.c11
6 files changed, 83 insertions, 84 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 2e78b0b96d74..394db40ed374 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -112,6 +112,15 @@ config EFI_CAPSULE_LOADER
Most users should say N.
+config EFI_CAPSULE_QUIRK_QUARK_CSH
+ boolean "Add support for Quark capsules with non-standard headers"
+ depends on X86 && !64BIT
+ select EFI_CAPSULE_LOADER
+ default y
+ help
+ Add support for processing Quark X1000 EFI capsules, whose header
+ layout deviates from the layout mandated by the UEFI specification.
+
config EFI_TEST
tristate "EFI Runtime Service Tests Support"
depends on EFI
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
index 974c5a31a005..1cc41c3d6315 100644
--- a/drivers/firmware/efi/arm-runtime.c
+++ b/drivers/firmware/efi/arm-runtime.c
@@ -11,6 +11,7 @@
*
*/
+#include <linux/dmi.h>
#include <linux/efi.h>
#include <linux/io.h>
#include <linux/memblock.h>
@@ -166,3 +167,18 @@ void efi_virtmap_unload(void)
efi_set_pgd(current->active_mm);
preempt_enable();
}
+
+
+static int __init arm_dmi_init(void)
+{
+ /*
+ * On arm64/ARM, DMI depends on UEFI, and dmi_scan_machine() needs to
+ * be called early because dmi_id_init(), which is an arch_initcall
+ * itself, depends on dmi_scan_machine() having been called already.
+ */
+ dmi_scan_machine();
+ if (dmi_available)
+ dmi_set_dump_stack_arch_desc();
+ return 0;
+}
+core_initcall(arm_dmi_init);
diff --git a/drivers/firmware/efi/capsule-loader.c b/drivers/firmware/efi/capsule-loader.c
index 9ae6c116c474..ec8ac5c4dd84 100644
--- a/drivers/firmware/efi/capsule-loader.c
+++ b/drivers/firmware/efi/capsule-loader.c
@@ -20,15 +20,9 @@
#define NO_FURTHER_WRITE_ACTION -1
-struct capsule_info {
- bool header_obtained;
- int reset_type;
- long index;
- size_t count;
- size_t total_size;
- struct page **pages;
- size_t page_bytes_remain;
-};
+#ifndef phys_to_page
+#define phys_to_page(x) pfn_to_page((x) >> PAGE_SHIFT)
+#endif
/**
* efi_free_all_buff_pages - free all previous allocated buffer pages
@@ -41,65 +35,70 @@ struct capsule_info {
static void efi_free_all_buff_pages(struct capsule_info *cap_info)
{
while (cap_info->index > 0)
- __free_page(cap_info->pages[--cap_info->index]);
+ __free_page(phys_to_page(cap_info->pages[--cap_info->index]));
cap_info->index = NO_FURTHER_WRITE_ACTION;
}
-/**
- * efi_capsule_setup_info - obtain the efi capsule header in the binary and
- * setup capsule_info structure
- * @cap_info: pointer to current instance of capsule_info structure
- * @kbuff: a mapped first page buffer pointer
- * @hdr_bytes: the total received number of bytes for efi header
- **/
-static ssize_t efi_capsule_setup_info(struct capsule_info *cap_info,
- void *kbuff, size_t hdr_bytes)
+int __efi_capsule_setup_info(struct capsule_info *cap_info)
{
- efi_capsule_header_t *cap_hdr;
size_t pages_needed;
int ret;
void *temp_page;
- /* Only process data block that is larger than efi header size */
- if (hdr_bytes < sizeof(efi_capsule_header_t))
- return 0;
-
- /* Reset back to the correct offset of header */
- cap_hdr = kbuff - cap_info->count;
- pages_needed = ALIGN(cap_hdr->imagesize, PAGE_SIZE) >> PAGE_SHIFT;
+ pages_needed = ALIGN(cap_info->total_size, PAGE_SIZE) / PAGE_SIZE;
if (pages_needed == 0) {
- pr_err("%s: pages count invalid\n", __func__);
+ pr_err("invalid capsule size");
return -EINVAL;
}
/* Check if the capsule binary supported */
- ret = efi_capsule_supported(cap_hdr->guid, cap_hdr->flags,
- cap_hdr->imagesize,
+ ret = efi_capsule_supported(cap_info->header.guid,
+ cap_info->header.flags,
+ cap_info->header.imagesize,
&cap_info->reset_type);
if (ret) {
- pr_err("%s: efi_capsule_supported() failed\n",
- __func__);
+ pr_err("capsule not supported\n");
return ret;
}
- cap_info->total_size = cap_hdr->imagesize;
temp_page = krealloc(cap_info->pages,
pages_needed * sizeof(void *),
GFP_KERNEL | __GFP_ZERO);
- if (!temp_page) {
- pr_debug("%s: krealloc() failed\n", __func__);
+ if (!temp_page)
return -ENOMEM;
- }
cap_info->pages = temp_page;
- cap_info->header_obtained = true;
return 0;
}
/**
+ * efi_capsule_setup_info - obtain the efi capsule header in the binary and
+ * setup capsule_info structure
+ * @cap_info: pointer to current instance of capsule_info structure
+ * @kbuff: a mapped first page buffer pointer
+ * @hdr_bytes: the total received number of bytes for efi header
+ *
+ * Platforms with non-standard capsule update mechanisms can override
+ * this __weak function so they can perform any required capsule
+ * image munging. See quark_quirk_function() for an example.
+ **/
+int __weak efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
+ size_t hdr_bytes)
+{
+ /* Only process data block that is larger than efi header size */
+ if (hdr_bytes < sizeof(efi_capsule_header_t))
+ return 0;
+
+ memcpy(&cap_info->header, kbuff, sizeof(cap_info->header));
+ cap_info->total_size = cap_info->header.imagesize;
+
+ return __efi_capsule_setup_info(cap_info);
+}
+
+/**
* efi_capsule_submit_update - invoke the efi_capsule_update API once binary
* upload done
* @cap_info: pointer to current instance of capsule_info structure
@@ -107,26 +106,17 @@ static ssize_t efi_capsule_setup_info(struct capsule_info *cap_info,
static ssize_t efi_capsule_submit_update(struct capsule_info *cap_info)
{
int ret;
- void *cap_hdr_temp;
-
- cap_hdr_temp = vmap(cap_info->pages, cap_info->index,
- VM_MAP, PAGE_KERNEL);
- if (!cap_hdr_temp) {
- pr_debug("%s: vmap() failed\n", __func__);
- return -EFAULT;
- }
- ret = efi_capsule_update(cap_hdr_temp, cap_info->pages);
- vunmap(cap_hdr_temp);
+ ret = efi_capsule_update(&cap_info->header, cap_info->pages);
if (ret) {
- pr_err("%s: efi_capsule_update() failed\n", __func__);
+ pr_err("capsule update failed\n");
return ret;
}
/* Indicate capsule binary uploading is done */
cap_info->index = NO_FURTHER_WRITE_ACTION;
- pr_info("%s: Successfully upload capsule file with reboot type '%s'\n",
- __func__, !cap_info->reset_type ? "RESET_COLD" :
+ pr_info("Successfully upload capsule file with reboot type '%s'\n",
+ !cap_info->reset_type ? "RESET_COLD" :
cap_info->reset_type == 1 ? "RESET_WARM" :
"RESET_SHUTDOWN");
return 0;
@@ -171,37 +161,30 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
if (!cap_info->page_bytes_remain) {
page = alloc_page(GFP_KERNEL);
if (!page) {
- pr_debug("%s: alloc_page() failed\n", __func__);
ret = -ENOMEM;
goto failed;
}
- cap_info->pages[cap_info->index++] = page;
+ cap_info->pages[cap_info->index++] = page_to_phys(page);
cap_info->page_bytes_remain = PAGE_SIZE;
+ } else {
+ page = phys_to_page(cap_info->pages[cap_info->index - 1]);
}
- page = cap_info->pages[cap_info->index - 1];
-
kbuff = kmap(page);
- if (!kbuff) {
- pr_debug("%s: kmap() failed\n", __func__);
- ret = -EFAULT;
- goto failed;
- }
kbuff += PAGE_SIZE - cap_info->page_bytes_remain;
/* Copy capsule binary data from user space to kernel space buffer */
write_byte = min_t(size_t, count, cap_info->page_bytes_remain);
if (copy_from_user(kbuff, buff, write_byte)) {
- pr_debug("%s: copy_from_user() failed\n", __func__);
ret = -EFAULT;
goto fail_unmap;
}
cap_info->page_bytes_remain -= write_byte;
/* Setup capsule binary info structure */
- if (!cap_info->header_obtained) {
- ret = efi_capsule_setup_info(cap_info, kbuff,
+ if (cap_info->header.headersize == 0) {
+ ret = efi_capsule_setup_info(cap_info, kbuff - cap_info->count,
cap_info->count + write_byte);
if (ret)
goto fail_unmap;
@@ -211,11 +194,10 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
kunmap(page);
/* Submit the full binary to efi_capsule_update() API */
- if (cap_info->header_obtained &&
+ if (cap_info->header.headersize > 0 &&
cap_info->count >= cap_info->total_size) {
if (cap_info->count > cap_info->total_size) {
- pr_err("%s: upload size exceeded header defined size\n",
- __func__);
+ pr_err("capsule upload size exceeded header defined size\n");
ret = -EINVAL;
goto failed;
}
@@ -249,7 +231,7 @@ static int efi_capsule_flush(struct file *file, fl_owner_t id)
struct capsule_info *cap_info = file->private_data;
if (cap_info->index > 0) {
- pr_err("%s: capsule upload not complete\n", __func__);
+ pr_err("capsule upload not complete\n");
efi_free_all_buff_pages(cap_info);
ret = -ECANCELED;
}
@@ -328,8 +310,7 @@ static int __init efi_capsule_loader_init(void)
ret = misc_register(&efi_capsule_misc);
if (ret)
- pr_err("%s: Failed to register misc char file note\n",
- __func__);
+ pr_err("Unable to register capsule loader device\n");
return ret;
}
diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c
index 6eedff45e6d7..901b9306bf94 100644
--- a/drivers/firmware/efi/capsule.c
+++ b/drivers/firmware/efi/capsule.c
@@ -214,7 +214,7 @@ efi_capsule_update_locked(efi_capsule_header_t *capsule,
*
* Return 0 on success, a converted EFI status code on failure.
*/
-int efi_capsule_update(efi_capsule_header_t *capsule, struct page **pages)
+int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages)
{
u32 imagesize = capsule->imagesize;
efi_guid_t guid = capsule->guid;
@@ -247,16 +247,13 @@ int efi_capsule_update(efi_capsule_header_t *capsule, struct page **pages)
efi_capsule_block_desc_t *sglist;
sglist = kmap(sg_pages[i]);
- if (!sglist) {
- rv = -ENOMEM;
- goto out;
- }
for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) {
- u64 sz = min_t(u64, imagesize, PAGE_SIZE);
+ u64 sz = min_t(u64, imagesize,
+ PAGE_SIZE - (u64)*pages % PAGE_SIZE);
sglist[j].length = sz;
- sglist[j].data = page_to_phys(*pages++);
+ sglist[j].data = *pages++;
imagesize -= sz;
count--;
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index b372aad3b449..045d6d311bde 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -528,7 +528,8 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz,
}
}
- efi_memattr_init();
+ if (efi_enabled(EFI_MEMMAP))
+ efi_memattr_init();
/* Parse the EFI Properties table if it exists */
if (efi.properties_table != EFI_INVALID_TABLE_ADDR) {
diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index 8cd578f62059..08129b7b80ab 100644
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -71,18 +71,13 @@ copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
if (!access_ok(VERIFY_READ, src, 1))
return -EFAULT;
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf) {
+ buf = memdup_user(src, len);
+ if (IS_ERR(buf)) {
*dst = NULL;
- return -ENOMEM;
+ return PTR_ERR(buf);
}
*dst = buf;
- if (copy_from_user(*dst, src, len)) {
- kfree(buf);
- return -EFAULT;
- }
-
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-19 07:28:05 +0300