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Date: Fri, 01 Feb 2008 17:35:00 +0800
From: "Huang, Ying" <ying.huang@...el.com>
To: Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@...e.de>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] x86: efi update for set_memory_xx
The patch updates EFI runtime memory mapping code according to the
changes to set_memory_xx.
Signed-off-by: Huang Ying <ying.huang@...el.com>
---
arch/x86/kernel/efi.c | 48 +++++++++++++++++++++++------------------------
arch/x86/kernel/efi_64.c | 40 ++++++++++++++++++++++++++-------------
include/asm-x86/efi.h | 8 +++++--
3 files changed, 57 insertions(+), 39 deletions(-)
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -379,31 +379,20 @@ void __init efi_init(void)
#endif
}
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
static void __init runtime_code_page_mkexec(void)
{
efi_memory_desc_t *md;
- unsigned long end;
+ unsigned long pages;
void *p;
- if (!(__supported_pte_mask & _PAGE_NX))
- return;
-
/* Make EFI runtime service code area executable */
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
md = p;
- end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
- if (md->type == EFI_RUNTIME_SERVICES_CODE &&
- (end >> PAGE_SHIFT) <= max_pfn_mapped) {
- set_memory_x(md->virt_addr, md->num_pages);
- set_memory_uc(md->virt_addr, md->num_pages);
- }
+ pages = (md->num_pages << EFI_PAGE_SHIFT) >> PAGE_SHIFT;
+ if (md->type == EFI_RUNTIME_SERVICES_CODE)
+ set_memory_x(md->virt_addr, md->phys_addr, pages);
}
- __flush_tlb_all();
}
-#else
-static inline void __init runtime_code_page_mkexec(void) { }
-#endif
/*
* This function will switch the EFI runtime services to virtual mode.
@@ -417,25 +406,35 @@ void __init efi_enter_virtual_mode(void)
{
efi_memory_desc_t *md;
efi_status_t status;
- unsigned long end;
+ unsigned long end, size, pages;
void *p;
+ int cache;
efi.systab = NULL;
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
md = p;
if (!(md->attribute & EFI_MEMORY_RUNTIME))
continue;
- end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
- if ((md->attribute & EFI_MEMORY_WB) &&
- ((end >> PAGE_SHIFT) <= max_pfn_mapped))
+ size = md->num_pages << EFI_PAGE_SHIFT;
+ pages = size >> PAGE_SHIFT;
+ end = md->phys_addr + size;
+ cache = !!(md->attribute & EFI_MEMORY_WB);
+ if ((end >> PAGE_SHIFT) <= max_pfn_mapped) {
md->virt_addr = (unsigned long)__va(md->phys_addr);
+ if (!cache)
+ set_memory_uc(md->virt_addr, md->phys_addr,
+ pages);
+ } else if (cache)
+ md->virt_addr = (unsigned long)efi_ioremap_cache(
+ md->phys_addr, size);
else
- md->virt_addr = (unsigned long)
- efi_ioremap(md->phys_addr,
- md->num_pages << EFI_PAGE_SHIFT);
- if (!md->virt_addr)
+ md->virt_addr = (unsigned long)efi_ioremap_nocache(
+ md->phys_addr, size);
+ if (!md->virt_addr) {
printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n",
(unsigned long long)md->phys_addr);
+ continue;
+ }
if ((md->phys_addr <= (unsigned long)efi_phys.systab) &&
((unsigned long)efi_phys.systab < end))
efi.systab = (efi_system_table_t *)(unsigned long)
@@ -473,7 +472,8 @@ void __init efi_enter_virtual_mode(void)
efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
efi.reset_system = virt_efi_reset_system;
efi.set_virtual_address_map = virt_efi_set_virtual_address_map;
- runtime_code_page_mkexec();
+ if (__supported_pte_mask & _PAGE_NX)
+ runtime_code_page_mkexec();
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
memmap.map = NULL;
}
--- a/arch/x86/kernel/efi_64.c
+++ b/arch/x86/kernel/efi_64.c
@@ -54,10 +54,10 @@ static void __init early_mapping_set_exe
else
set_pte(kpte, __pte((pte_val(*kpte) | _PAGE_NX) & \
__supported_pte_mask));
- if (level == 4)
- start = (start + PMD_SIZE) & PMD_MASK;
- else
+ if (level == PG_LEVEL_4K)
start = (start + PAGE_SIZE) & PAGE_MASK;
+ else
+ start = (start + PMD_SIZE) & PMD_MASK;
}
}
@@ -109,26 +109,40 @@ void __init efi_reserve_bootmem(void)
memmap.nr_map * memmap.desc_size);
}
-void __iomem * __init efi_ioremap(unsigned long offset,
- unsigned long size)
+static void __iomem __init *__efi_ioremap(unsigned long phys_addr,
+ unsigned long size,
+ int cache)
{
static unsigned pages_mapped;
- unsigned long last_addr;
- unsigned i, pages;
+ unsigned long addr, pages;
+ pgprot_t prot;
- last_addr = offset + size - 1;
- offset &= PAGE_MASK;
- pages = (PAGE_ALIGN(last_addr) - offset) >> PAGE_SHIFT;
+ /* phys_addr and size must be page aligned */
+ if ((phys_addr & ~PAGE_MASK) || (size & ~PAGE_MASK))
+ return NULL;
+ pages = size >> PAGE_SHIFT;
if (pages_mapped + pages > MAX_EFI_IO_PAGES)
return NULL;
- for (i = 0; i < pages; i++) {
+ prot = cache ? PAGE_KERNEL : PAGE_KERNEL_NOCACHE;
+ for (addr = phys_addr; addr < phys_addr + size; addr += PAGE_SIZE) {
__set_fixmap(FIX_EFI_IO_MAP_FIRST_PAGE - pages_mapped,
- offset, PAGE_KERNEL_EXEC_NOCACHE);
- offset += PAGE_SIZE;
+ addr, prot);
pages_mapped++;
}
return (void __iomem *)__fix_to_virt(FIX_EFI_IO_MAP_FIRST_PAGE - \
(pages_mapped - pages));
}
+
+void __iomem __init *efi_ioremap_cache(unsigned long phys_addr,
+ unsigned long size)
+{
+ return __efi_ioremap(phys_addr, size, 1);
+}
+
+void __iomem __init *efi_ioremap_nocache(unsigned long phys_addr,
+ unsigned long size)
+{
+ return __efi_ioremap(phys_addr, size, 0);
+}
--- a/include/asm-x86/efi.h
+++ b/include/asm-x86/efi.h
@@ -33,7 +33,8 @@ extern unsigned long asmlinkage efi_call
#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
efi_call_virt(f, a1, a2, a3, a4, a5, a6)
-#define efi_ioremap(addr, size) ioremap(addr, size)
+#define efi_ioremap_cache(addr, size) ioremap_cache(addr, size)
+#define efi_ioremap_nocache(addr, size) ioremap_nocache(addr, size)
#else /* !CONFIG_X86_32 */
@@ -86,7 +87,10 @@ extern u64 efi_call6(void *fp, u64 arg1,
efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
-extern void *efi_ioremap(unsigned long offset, unsigned long size);
+extern void __iomem *efi_ioremap_cache(unsigned long phys_addr,
+ unsigned long size);
+extern void __iomem *efi_ioremap_nocache(unsigned long phys_addr,
+ unsigned long size);
#endif /* CONFIG_X86_32 */
--
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