[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1344547389-4599-5-git-send-email-jacob.shin@amd.com>
Date: Thu, 9 Aug 2012 16:23:08 -0500
From: Jacob Shin <jacob.shin@....com>
To: X86-ML <x86@...nel.org>
CC: LKML <linux-kernel@...r.kernel.org>,
Yinghai Lu <yinghai@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>,
Andreas Herrmann <andreas.herrmann3@....com>,
Jacob Shin <jacob.shin@....com>
Subject: [PATCH 4/5] x86: Fixup code testing if a pfn is direct mapped
Update code that previously assumed pfns [ 0 - max_low_pfn_mapped ) and
[ 4GB - max_pfn_mapped ) were always direct mapped; to now look up
pfn_mapped ranges instead.
Signed-off-by: Jacob Shin <jacob.shin@....com>
---
arch/x86/kernel/cpu/amd.c | 6 +-----
arch/x86/platform/efi/efi.c | 8 ++++----
2 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 9d92e19..554ccfc 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -677,11 +677,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
*/
if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg)) {
printk(KERN_DEBUG "tseg: %010llx\n", tseg);
- if ((tseg>>PMD_SHIFT) <
- (max_low_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) ||
- ((tseg>>PMD_SHIFT) <
- (max_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) &&
- (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT))))
+ if (pfn_is_mapped(tseg))
set_memory_4k((unsigned long)__va(tseg), 1);
}
}
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 2dc29f5..4810ab3 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -754,7 +754,7 @@ void __init efi_enter_virtual_mode(void)
efi_memory_desc_t *md, *prev_md = NULL;
efi_status_t status;
unsigned long size;
- u64 end, systab, addr, npages, end_pfn;
+ u64 end, systab, addr, npages, start_pfn, end_pfn;
void *p, *va, *new_memmap = NULL;
int count = 0;
@@ -805,10 +805,10 @@ void __init efi_enter_virtual_mode(void)
size = md->num_pages << EFI_PAGE_SHIFT;
end = md->phys_addr + size;
+ start_pfn = PFN_DOWN(md->phys_addr);
end_pfn = PFN_UP(end);
- if (end_pfn <= max_low_pfn_mapped
- || (end_pfn > (1UL << (32 - PAGE_SHIFT))
- && end_pfn <= max_pfn_mapped))
+
+ if (pfn_range_is_mapped(start_pfn, end_pfn))
va = __va(md->phys_addr);
else
va = efi_ioremap(md->phys_addr, size, md->type);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists