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Subject[PATCH 34/39] x86: Use walk_system_ream_range() instead of referring e820.map directly for tboot
Date
So we can make e820 to be __initdata

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/kernel/tboot.c | 22 +++++++++-------------
1 files changed, 9 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index cc2c604..cf27d64 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -170,34 +170,30 @@ static void tboot_create_trampoline(void)

#ifdef CONFIG_ACPI_SLEEP

-static void add_mac_region(phys_addr_t start, unsigned long size)
+static int
+add_mac_region(unsigned long start_pfn, unsigned long nr_pages, void *arg)
{
+ u64 start = start_pfn;
+ u64 size = nr_pages;
struct tboot_mac_region *mr;
- phys_addr_t end = start + size;

if (tboot->num_mac_regions >= MAX_TB_MAC_REGIONS)
panic("tboot: Too many MAC regions\n");

if (start && size) {
mr = &tboot->mac_regions[tboot->num_mac_regions++];
- mr->start = round_down(start, PAGE_SIZE);
- mr->size = round_up(end, PAGE_SIZE) - mr->start;
+ mr->start = start << PAGE_SHIFT;
+ mr->size = (u32) (size << PAGE_SHIFT);
}
+
+ return 0;
}

static int tboot_setup_sleep(void)
{
- int i;
-
tboot->num_mac_regions = 0;

- for (i = 0; i < e820.nr_map; i++) {
- if ((e820.map[i].type != E820_RAM)
- && (e820.map[i].type != E820_RESERVED_KERN))
- continue;
-
- add_mac_region(e820.map[i].addr, e820.map[i].size);
- }
+ walk_system_ram_range(0, max_pfn, NULL, add_mac_region);

tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address;

--
1.6.4.2


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