Displaying 20 results from an estimated 107 matches for "__set_fixmap".
2012 Jun 15
3
[HYBRID] : mapping IO mems in the EPT
Hi guys,
During my refresh to latest linux, I noticed, direct mapping of all
non-RAM pages in xen_set_identity_and_release(). I currently don''t map
all at front, but as needed looking at the PAGE_IO bit in the pte. One
result of that is minor change to common code macro:
__set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) to
to __set_fixmap(idx, phys, PAGE_KERNEL_IO_NOCACHE)
To avoid this change, and keep all my changes limited to xen files only,
I thought I could just map the entire non-ram pages up front too. But
I am concerned the EPT may grow too large? Specially, when we...
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...@ -45,23 +46,88 @@ void enable_sep_cpu(void)
*/
extern const char vsyscall_int80_start, vsyscall_int80_end;
extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
+static void *syscall_page;
int __init sysenter_setup(void)
{
- void *page = (void *)get_zeroed_page(GFP_ATOMIC);
-
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
+ syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
if (!boot_cpu_has(X86_FEATURE_SEP)) {
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
return 0;...
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...@ -45,23 +46,88 @@ void enable_sep_cpu(void)
*/
extern const char vsyscall_int80_start, vsyscall_int80_end;
extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
+static void *syscall_page;
int __init sysenter_setup(void)
{
- void *page = (void *)get_zeroed_page(GFP_ATOMIC);
-
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
+ syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
if (!boot_cpu_has(X86_FEATURE_SEP)) {
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
return 0;...
2007 Apr 18
2
[PATCH] exec-shield style vdso move.
...-45,23 +46,111 @@ void enable_sep_cpu(void)
*/
extern const char vsyscall_int80_start, vsyscall_int80_end;
extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
+static void *syscall_page;
int __init sysenter_setup(void)
{
- void *page = (void *)get_zeroed_page(GFP_ATOMIC);
-
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
+ syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
if (!boot_cpu_has(X86_FEATURE_SEP)) {
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
return 0;...
2007 Apr 18
2
[PATCH] exec-shield style vdso move.
...-45,23 +46,111 @@ void enable_sep_cpu(void)
*/
extern const char vsyscall_int80_start, vsyscall_int80_end;
extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
+static void *syscall_page;
int __init sysenter_setup(void)
{
- void *page = (void *)get_zeroed_page(GFP_ATOMIC);
-
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
+ syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
if (!boot_cpu_has(X86_FEATURE_SEP)) {
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
return 0;...
2013 Apr 10
1
[PATCH v3] x86: use a read-only IDT alias on all CPUs
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..7170024 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2013 Apr 10
1
[PATCH v3] x86: use a read-only IDT alias on all CPUs
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..7170024 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2007 Apr 18
4
[patch 0/2] Updates to compat VDSOs
Hi Andi,
Here's a couple of patches to fix up COMPAT_VDSO:
The first is a straightforward implementation of Jan's original idea
of relocating the VDSO to match its mapped location. Unlike Jan and
Zach's version, I changed it to relocate based on the phdrs rather than
the sections; the result is pleasantly compact.
The second patch takes advantage of the fact that all the
2007 Apr 18
4
[patch 0/2] Updates to compat VDSOs
Hi Andi,
Here's a couple of patches to fix up COMPAT_VDSO:
The first is a straightforward implementation of Jan's original idea
of relocating the VDSO to match its mapped location. Unlike Jan and
Zach's version, I changed it to relocate based on the phdrs rather than
the sections; the result is pleasantly compact.
The second patch takes advantage of the fact that all the
2013 Apr 08
3
[PATCH] x86: make IDT read-only
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..76148a3 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2013 Apr 08
3
[PATCH] x86: make IDT read-only
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..76148a3 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2013 Apr 09
2
[PATCH v2] x86: use fixed read-only IDT
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..7170024 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2013 Apr 09
2
[PATCH v2] x86: use fixed read-only IDT
...el/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1905ce9..7170024 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void)
return 0;
}
-#ifdef CONFIG_X86_F00F_BUG
-static void __cpuinit trap_init_f00f_bug(void)
-{
- __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
-
- /*
- * Update the IDT descriptor and reload the IDT so that
- * it uses the read-only mapped virtual address.
- */
- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
- load_idt(&idt_descr);
-}
-#endif
-
static void __cpuinit intel_smp...
2007 Feb 14
2
[PATCH 8/8] 2.6.17: scan DMI early
...hared_info_t *)fix_to_virt(FIX_SHARED_INFO);
+ memset(empty_zero_page, 0, sizeof(empty_zero_page));
+
+ /* Setup mapping of lower 1st MB */
+ for (next = 0; next < NR_FIX_ISAMAPS; next++)
+ if (is_initial_xendomain())
+ set_fixmap(FIX_ISAMAP_BEGIN - next, next * PAGE_SIZE);
+ else
+ __set_fixmap(FIX_ISAMAP_BEGIN - next,
+ virt_to_mfn(empty_zero_page) << PAGE_SHIFT,
+ PAGE_KERNEL_RO);
+
+ BUG_ON(start_pfn > table_end);
+ table_end = start_pfn;
}
__flush_tlb_all();
@@ -817,7 +869,6 @@ size_zones(unsigned long *z, unsigned lo
void __init paging_init(void)...
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...t;e_phnum; i++) {
+ phdr[i].p_vaddr +=3D VSYSCALL_RELOCATION;
+ phdr[i].p_paddr +=3D VSYSCALL_RELOCATION;
+ }
+ SYSENTER_RETURN_ADDR =3D (char *)&SYSENTER_RETURN + VSYSCALL_RELOCATION;
+}
+#endif
+
int __init sysenter_setup(void)
{
void *page =3D (void *)get_zeroed_page(GFP_ATOMIC);
=
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
-
- if (!boot_cpu_has(X86_FEATURE_SEP)) {
+ if (!boot_cpu_has(X86_FEATURE_SEP))
memcpy(page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
- return 0;
- }
+ else
+ memcpy(page,
+ &vsysca...
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...t;e_phnum; i++) {
+ phdr[i].p_vaddr +=3D VSYSCALL_RELOCATION;
+ phdr[i].p_paddr +=3D VSYSCALL_RELOCATION;
+ }
+ SYSENTER_RETURN_ADDR =3D (char *)&SYSENTER_RETURN + VSYSCALL_RELOCATION;
+}
+#endif
+
int __init sysenter_setup(void)
{
void *page =3D (void *)get_zeroed_page(GFP_ATOMIC);
=
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
-
- if (!boot_cpu_has(X86_FEATURE_SEP)) {
+ if (!boot_cpu_has(X86_FEATURE_SEP))
memcpy(page,
&vsyscall_int80_start,
&vsyscall_int80_end - &vsyscall_int80_start);
- return 0;
- }
+ else
+ memcpy(page,
+ &vsysca...
2007 Apr 18
0
[RFC/PATCH PV_OPS X86_64 14/17] paravirt_ops - vsyscall
...syscall(void)
{
+#ifndef CONFIG_PARAVIRT
extern char __vsyscall_0;
unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
+#else
+ unsigned long physaddr_page0 = __pa_symbol(paravirt_ops.vsyscall_page);
+#endif
/* Note that VSYSCALL_MAPPED_PAGES must agree with the code below. */
__set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
@@ -299,7 +308,14 @@ static int __init vsyscall_init(void)
BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
BUG_ON((unsigned long) &vgetcpu != VSYS...
2007 Apr 18
0
[RFC/PATCH PV_OPS X86_64 14/17] paravirt_ops - vsyscall
...syscall(void)
{
+#ifndef CONFIG_PARAVIRT
extern char __vsyscall_0;
unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
+#else
+ unsigned long physaddr_page0 = __pa_symbol(paravirt_ops.vsyscall_page);
+#endif
/* Note that VSYSCALL_MAPPED_PAGES must agree with the code below. */
__set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
@@ -299,7 +308,14 @@ static int __init vsyscall_init(void)
BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
BUG_ON((unsigned long) &vgetcpu != VSYS...
2007 Apr 18
8
[patch 0/8] Basic infrastructure patches for a paravirtualized kernel
Hi Andrew,
This series of patches lays the basic ground work for the
paravirtualized kernel patches coming later on. I think this lot is
ready for the rough-and-tumble world of the -mm tree.
The main change from the last posting is that all the page-table
related patches have been moved out, and will be posted separately.
Also, the off-by-one in reserving the top of address space has been
2007 Apr 18
8
[patch 0/8] Basic infrastructure patches for a paravirtualized kernel
Hi Andrew,
This series of patches lays the basic ground work for the
paravirtualized kernel patches coming later on. I think this lot is
ready for the rough-and-tumble world of the -mm tree.
The main change from the last posting is that all the page-table
related patches have been moved out, and will be posted separately.
Also, the off-by-one in reserving the top of address space has been