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Commit b03acc4c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull EFI updates from Thomas Gleixner:

 - A fix for a add_efi_memmap parameter regression which ensures that
   the parameter is parsed before it is used.

 - Reinstate the virtual capsule mapping as the cached copy turned out
   to break Quark and other things

 - Remove Matt Fleming as EFI co-maintainer. He stepped back a few days
   ago. Thanks Matt for all your great work!

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Remove Matt Fleming as EFI co-maintainer
  efi/capsule-loader: Reinstate virtual capsule mapping
  x86/efi: Fix kernel param add_efi_memmap regression
parents 3eac6903 81b60dbf

MAINTAINERS

+3 −4
Original line number Diff line number Diff line
@@ -5149,15 +5149,15 @@ F: sound/usb/misc/ua101.c 
EFI TEST DRIVER

L:	linux-efi@vger.kernel.org

M:	Ivan Hu <ivan.hu@canonical.com>

M:	Matt Fleming <matt@codeblueprint.co.uk>

M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>

S:	Maintained

F:	drivers/firmware/efi/test/



EFI VARIABLE FILESYSTEM

M:	Matthew Garrett <matthew.garrett@nebula.com>

M:	Jeremy Kerr <jk@ozlabs.org>

M:	Matt Fleming <matt@codeblueprint.co.uk>

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git

M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git

L:	linux-efi@vger.kernel.org

S:	Maintained

F:	fs/efivarfs/
@@ -5318,7 +5318,6 @@ S: Supported 
F:	security/integrity/evm/



EXTENSIBLE FIRMWARE INTERFACE (EFI)

M:	Matt Fleming <matt@codeblueprint.co.uk>

M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>

L:	linux-efi@vger.kernel.org

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git

arch/x86/kernel/setup.c

+2 −3
Original line number Diff line number Diff line
@@ -906,9 +906,6 @@ void __init setup_arch(char **cmdline_p) 
		set_bit(EFI_BOOT, &efi.flags);

		set_bit(EFI_64BIT, &efi.flags);

	}



	if (efi_enabled(EFI_BOOT))

		efi_memblock_x86_reserve_range();

#endif



	x86_init.oem.arch_setup();
@@ -962,6 +959,8 @@ void __init setup_arch(char **cmdline_p) 


	parse_early_param();



	if (efi_enabled(EFI_BOOT))

		efi_memblock_x86_reserve_range();

#ifdef CONFIG_MEMORY_HOTPLUG

	/*

	 * Memory used by the kernel cannot be hot-removed because Linux

arch/x86/platform/efi/quirks.c

+12 −1
Original line number Diff line number Diff line
@@ -592,7 +592,18 @@ static int qrk_capsule_setup_info(struct capsule_info *cap_info, void **pkbuff, 
	/*

	 * Update the first page pointer to skip over the CSH header.

	 */

	cap_info->pages[0] += csh->headersize;

	cap_info->phys[0] += csh->headersize;



	/*

	 * cap_info->capsule should point at a virtual mapping of the entire

	 * capsule, starting at the capsule header. Our image has the Quark

	 * security header prepended, so we cannot rely on the default vmap()

	 * mapping created by the generic capsule code.

	 * Given that the Quark firmware does not appear to care about the

	 * virtual mapping, let's just point cap_info->capsule at our copy

	 * of the capsule header.

	 */

	cap_info->capsule = &cap_info->header;



	return 1;

}

drivers/firmware/efi/capsule-loader.c

+37 −8
Original line number Diff line number Diff line
@@ -20,10 +20,6 @@ 


#define NO_FURTHER_WRITE_ACTION -1



#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

 * @cap_info: pointer to current instance of capsule_info structure
@@ -35,7 +31,7 @@ 
static void efi_free_all_buff_pages(struct capsule_info *cap_info)

{

	while (cap_info->index > 0)

		__free_page(phys_to_page(cap_info->pages[--cap_info->index]));

		__free_page(cap_info->pages[--cap_info->index]);



	cap_info->index = NO_FURTHER_WRITE_ACTION;

}
@@ -71,6 +67,14 @@ int __efi_capsule_setup_info(struct capsule_info *cap_info) 


	cap_info->pages = temp_page;



	temp_page = krealloc(cap_info->phys,

			     pages_needed * sizeof(phys_addr_t *),

			     GFP_KERNEL | __GFP_ZERO);

	if (!temp_page)

		return -ENOMEM;



	cap_info->phys = temp_page;



	return 0;

}
@@ -105,9 +109,24 @@ int __weak efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff, 
 **/

static ssize_t efi_capsule_submit_update(struct capsule_info *cap_info)

{

	bool do_vunmap = false;

	int ret;



	ret = efi_capsule_update(&cap_info->header, cap_info->pages);

	/*

	 * cap_info->capsule may have been assigned already by a quirk

	 * handler, so only overwrite it if it is NULL

	 */

	if (!cap_info->capsule) {

		cap_info->capsule = vmap(cap_info->pages, cap_info->index,

					 VM_MAP, PAGE_KERNEL);

		if (!cap_info->capsule)

			return -ENOMEM;

		do_vunmap = true;

	}



	ret = efi_capsule_update(cap_info->capsule, cap_info->phys);

	if (do_vunmap)

		vunmap(cap_info->capsule);

	if (ret) {

		pr_err("capsule update failed\n");

		return ret;
@@ -165,10 +184,12 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff, 
			goto failed;

		}



		cap_info->pages[cap_info->index++] = page_to_phys(page);

		cap_info->pages[cap_info->index] = page;

		cap_info->phys[cap_info->index] = page_to_phys(page);

		cap_info->page_bytes_remain = PAGE_SIZE;

		cap_info->index++;

	} else {

		page = phys_to_page(cap_info->pages[cap_info->index - 1]);

		page = cap_info->pages[cap_info->index - 1];

	}



	kbuff = kmap(page);
@@ -252,6 +273,7 @@ static int efi_capsule_release(struct inode *inode, struct file *file) 
	struct capsule_info *cap_info = file->private_data;



	kfree(cap_info->pages);

	kfree(cap_info->phys);

	kfree(file->private_data);

	file->private_data = NULL;

	return 0;
@@ -281,6 +303,13 @@ static int efi_capsule_open(struct inode *inode, struct file *file) 
		return -ENOMEM;

	}



	cap_info->phys = kzalloc(sizeof(void *), GFP_KERNEL);

	if (!cap_info->phys) {

		kfree(cap_info->pages);

		kfree(cap_info);

		return -ENOMEM;

	}



	file->private_data = cap_info;



	return 0;

include/linux/efi.h

+3 −1
Original line number Diff line number Diff line
@@ -140,11 +140,13 @@ struct efi_boot_memmap { 


struct capsule_info {

	efi_capsule_header_t	header;

	efi_capsule_header_t	*capsule;

	int			reset_type;

	long			index;

	size_t			count;

	size_t			total_size;

	phys_addr_t		*pages;

	struct page		**pages;

	phys_addr_t		*phys;

	size_t			page_bytes_remain;

};