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

Browse Source 
Pull EFI updates from Ingo Molnar:
 "The main EFI changes in this cycle were:

   - Use 32-bit alignment for efi_guid_t

   - Allow the SetVirtualAddressMap() call to be omitted

   - Implement earlycon=efifb based on existing earlyprintk code

   - Various minor fixes and code cleanups from Sai, Ard and me"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Fix build error due to enum collision between efi.h and ima.h
  efi/x86: Convert x86 EFI earlyprintk into generic earlycon implementation
  x86: Make ARCH_USE_MEMREMAP_PROT a generic Kconfig symbol
  efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted
  efi: Replace GPL license boilerplate with SPDX headers
  efi/fdt: Apply more cleanups
  efi: Use 32-bit alignment for efi_guid_t
  efi/memattr: Don't bail on zero VA if it equals the region's PA
  x86/efi: Mark can_free_region() as an __init function
This commit is contained in:
Linus Torvalds
2019-03-06 07:13:56 -08:00
parent 3717f613f4 5c418dc789
commit c8f5ed6ef9
46 changed files with 393 additions and 567 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/Kconfig
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@@ -1510,6 +1510,7 @@ config AMD_MEM_ENCRYPT
bool "AMD Secure Memory Encryption (SME) support"
depends on X86_64 && CPU_SUP_AMD
select DYNAMIC_PHYSICAL_MASK
select ARCH_USE_MEMREMAP_PROT
---help---
Say yes to enable support for the encryption of system memory.
This requires an AMD processor that supports Secure Memory
@@ -1529,10 +1530,6 @@ config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT
If set to N, then the encryption of system memory can be
activated with the mem_encrypt=on command line option.
config ARCH_USE_MEMREMAP_PROT
def_bool y
depends on AMD_MEM_ENCRYPT
# Common NUMA Features
config NUMA
bool "Numa Memory Allocation and Scheduler Support"

10
arch/x86/Kconfig.debug
View File

@@ -40,16 +40,6 @@ config EARLY_PRINTK_DBGP
with klogd/syslogd or the X server. You should normally say N here,
unless you want to debug such a crash. You need usb debug device.
config EARLY_PRINTK_EFI
bool "Early printk via the EFI framebuffer"
depends on EFI && EARLY_PRINTK
select FONT_SUPPORT
---help---
Write kernel log output directly into the EFI framebuffer.
This is useful for kernel debugging when your machine crashes very
early before the console code is initialized.
config EARLY_PRINTK_USB_XDBC
bool "Early printk via the xHCI debug port"
depends on EARLY_PRINTK && PCI

1
arch/x86/include/asm/efi.h
View File

@@ -170,7 +170,6 @@ static inline bool efi_runtime_supported(void)
return false;
}
extern struct console early_efi_console;
extern void parse_efi_setup(u64 phys_addr, u32 data_len);
extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);

4
arch/x86/kernel/early_printk.c
View File

@@ -388,10 +388,6 @@ static int __init setup_early_printk(char *buf)
if (!strncmp(buf, "xen", 3))
early_console_register(&xenboot_console, keep);
#endif
#ifdef CONFIG_EARLY_PRINTK_EFI
if (!strncmp(buf, "efi", 3))
early_console_register(&early_efi_console, keep);
#endif
#ifdef CONFIG_EARLY_PRINTK_USB_XDBC
if (!strncmp(buf, "xdbc", 4))
early_xdbc_parse_parameter(buf + 4);

4
arch/x86/mm/ioremap.c
View File

@@ -705,7 +705,7 @@ bool phys_mem_access_encrypted(unsigned long phys_addr, unsigned long size)
return arch_memremap_can_ram_remap(phys_addr, size, 0);
}
#ifdef CONFIG_ARCH_USE_MEMREMAP_PROT
#ifdef CONFIG_AMD_MEM_ENCRYPT
/* Remap memory with encryption */
void __init *early_memremap_encrypted(resource_size_t phys_addr,
unsigned long size)
@@ -747,7 +747,7 @@ void __init *early_memremap_decrypted_wp(resource_size_t phys_addr,
return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC_WP);
}
#endif /* CONFIG_ARCH_USE_MEMREMAP_PROT */
#endif /* CONFIG_AMD_MEM_ENCRYPT */
static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;

1
arch/x86/platform/efi/Makefile
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@@ -3,5 +3,4 @@ OBJECT_FILES_NON_STANDARD_efi_thunk_$(BITS).o := y
OBJECT_FILES_NON_STANDARD_efi_stub_$(BITS).o := y
obj-$(CONFIG_EFI) += quirks.o efi.o efi_$(BITS).o efi_stub_$(BITS).o
obj-$(CONFIG_EARLY_PRINTK_EFI) += early_printk.o
obj-$(CONFIG_EFI_MIXED) += efi_thunk_$(BITS).o

240
arch/x86/platform/efi/early_printk.c
View File

@@ -1,240 +0,0 @@
/*
* Copyright (C) 2013 Intel Corporation; author Matt Fleming
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2.
*/
#include <linux/console.h>
#include <linux/efi.h>
#include <linux/font.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <asm/setup.h>
static const struct font_desc *font;
static u32 efi_x, efi_y;
static void *efi_fb;
static bool early_efi_keep;
/*
* efi earlyprintk need use early_ioremap to map the framebuffer.
* But early_ioremap is not usable for earlyprintk=efi,keep, ioremap should
* be used instead. ioremap will be available after paging_init() which is
* earlier than initcall callbacks. Thus adding this early initcall function
* early_efi_map_fb to map the whole efi framebuffer.
*/
static __init int early_efi_map_fb(void)
{
u64 base, size;
if (!early_efi_keep)
return 0;
base = boot_params.screen_info.lfb_base;
if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
base |= (u64)boot_params.screen_info.ext_lfb_base << 32;
size = boot_params.screen_info.lfb_size;
efi_fb = ioremap(base, size);
return efi_fb ? 0 : -ENOMEM;
}
early_initcall(early_efi_map_fb);
/*
* early_efi_map maps efi framebuffer region [start, start + len -1]
* In case earlyprintk=efi,keep we have the whole framebuffer mapped already
* so just return the offset efi_fb + start.
*/
static __ref void *early_efi_map(unsigned long start, unsigned long len)
{
u64 base;
base = boot_params.screen_info.lfb_base;
if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
base |= (u64)boot_params.screen_info.ext_lfb_base << 32;
if (efi_fb)
return (efi_fb + start);
else
return early_ioremap(base + start, len);
}
static __ref void early_efi_unmap(void *addr, unsigned long len)
{
if (!efi_fb)
early_iounmap(addr, len);
}
static void early_efi_clear_scanline(unsigned int y)
{
unsigned long *dst;
u16 len;
len = boot_params.screen_info.lfb_linelength;
dst = early_efi_map(y*len, len);
if (!dst)
return;
memset(dst, 0, len);
early_efi_unmap(dst, len);
}
static void early_efi_scroll_up(void)
{
unsigned long *dst, *src;
u16 len;
u32 i, height;
len = boot_params.screen_info.lfb_linelength;
height = boot_params.screen_info.lfb_height;
for (i = 0; i < height - font->height; i++) {
dst = early_efi_map(i*len, len);
if (!dst)
return;
src = early_efi_map((i + font->height) * len, len);
if (!src) {
early_efi_unmap(dst, len);
return;
}
memmove(dst, src, len);
early_efi_unmap(src, len);
early_efi_unmap(dst, len);
}
}
static void early_efi_write_char(u32 *dst, unsigned char c, unsigned int h)
{
const u32 color_black = 0x00000000;
const u32 color_white = 0x00ffffff;
const u8 *src;
u8 s8;
int m;
src = font->data + c * font->height;
s8 = *(src + h);
for (m = 0; m < 8; m++) {
if ((s8 >> (7 - m)) & 1)
*dst = color_white;
else
*dst = color_black;
dst++;
}
}
static void
early_efi_write(struct console *con, const char *str, unsigned int num)
{
struct screen_info *si;
unsigned int len;
const char *s;
void *dst;
si = &boot_params.screen_info;
len = si->lfb_linelength;
while (num) {
unsigned int linemax;
unsigned int h, count = 0;
for (s = str; *s && *s != '\n'; s++) {
if (count == num)
break;
count++;
}
linemax = (si->lfb_width - efi_x) / font->width;
if (count > linemax)
count = linemax;
for (h = 0; h < font->height; h++) {
unsigned int n, x;
dst = early_efi_map((efi_y + h) * len, len);
if (!dst)
return;
s = str;
n = count;
x = efi_x;
while (n-- > 0) {
early_efi_write_char(dst + x*4, *s, h);
x += font->width;
s++;
}
early_efi_unmap(dst, len);
}
num -= count;
efi_x += count * font->width;
str += count;
if (num > 0 && *s == '\n') {
efi_x = 0;
efi_y += font->height;
str++;
num--;
}
if (efi_x + font->width > si->lfb_width) {
efi_x = 0;
efi_y += font->height;
}
if (efi_y + font->height > si->lfb_height) {
u32 i;
efi_y -= font->height;
early_efi_scroll_up();
for (i = 0; i < font->height; i++)
early_efi_clear_scanline(efi_y + i);
}
}
}
static __init int early_efi_setup(struct console *con, char *options)
{
struct screen_info *si;
u16 xres, yres;
u32 i;
si = &boot_params.screen_info;
xres = si->lfb_width;
yres = si->lfb_height;
/*
* early_efi_write_char() implicitly assumes a framebuffer with
* 32-bits per pixel.
*/
if (si->lfb_depth != 32)
return -ENODEV;
font = get_default_font(xres, yres, -1, -1);
if (!font)
return -ENODEV;
efi_y = rounddown(yres, font->height) - font->height;
for (i = 0; i < (yres - efi_y) / font->height; i++)
early_efi_scroll_up();
/* early_console_register will unset CON_BOOT in case ,keep */
if (!(con->flags & CON_BOOT))
early_efi_keep = true;
return 0;
}
struct console early_efi_console = {
.name = "earlyefi",
.write = early_efi_write,
.setup = early_efi_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
};

6
arch/x86/platform/efi/quirks.c
View File

@@ -304,7 +304,7 @@ void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size)
* - Not within any part of the kernel
* - Not the BIOS reserved area (E820_TYPE_RESERVED, E820_TYPE_NVS, etc)
*/
static bool can_free_region(u64 start, u64 size)
static __init bool can_free_region(u64 start, u64 size)
{
if (start + size > __pa_symbol(_text) && start <= __pa_symbol(_end))
return false;
@@ -717,7 +717,7 @@ void efi_recover_from_page_fault(unsigned long phys_addr)
* "efi_mm" cannot be used to check if the page fault had occurred
* in the firmware context because efi=old_map doesn't use efi_pgd.
*/
if (efi_rts_work.efi_rts_id == NONE)
if (efi_rts_work.efi_rts_id == EFI_NONE)
return;
/*
@@ -742,7 +742,7 @@ void efi_recover_from_page_fault(unsigned long phys_addr)
* because this case occurs *very* rarely and hence could be improved
* on a need by basis.
*/
if (efi_rts_work.efi_rts_id == RESET_SYSTEM) {
if (efi_rts_work.efi_rts_id == EFI_RESET_SYSTEM) {
pr_info("efi_reset_system() buggy! Reboot through BIOS\n");
machine_real_restart(MRR_BIOS);
return;