Displaying 20 results from an estimated 38 matches for "x86_feature_sep".
2007 Jul 12
1
[PATCH] lguest: disable SYSENTER for guests
...=============================================================
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -338,6 +338,10 @@ int run_guest(struct lguest *lg, unsigne
if (lg->ts)
set_ts();
+ /* Don't let Guest do SYSENTER: we can't handle it. */
+ if (boot_cpu_has(X86_FEATURE_SEP))
+ wrmsr(MSR_IA32_SYSENTER_CS, 0, 0);
+
run_guest_once(lg, lguest_pages(raw_smp_processor_id()));
/* Save cr2 now if we page-faulted. */
@@ -345,6 +349,9 @@ int run_guest(struct lguest *lg, unsigne
cr2 = read_cr2();
else if (lg->regs->trapnum == 7)
math_state_restore();...
2007 Jul 12
1
[PATCH] lguest: disable SYSENTER for guests
...=============================================================
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -338,6 +338,10 @@ int run_guest(struct lguest *lg, unsigne
if (lg->ts)
set_ts();
+ /* Don't let Guest do SYSENTER: we can't handle it. */
+ if (boot_cpu_has(X86_FEATURE_SEP))
+ wrmsr(MSR_IA32_SYSENTER_CS, 0, 0);
+
run_guest_once(lg, lguest_pages(raw_smp_processor_id()));
/* Save cr2 now if we page-faulted. */
@@ -345,6 +349,9 @@ int run_guest(struct lguest *lg, unsigne
cr2 = read_cr2();
else if (lg->regs->trapnum == 7)
math_state_restore();...
2017 Oct 04
0
[PATCH 09/13] x86/asm: Convert ALTERNATIVE*() assembler macros to preprocessor macros
...*/
- ALTERNATIVE_2 "", SYSENTER_SEQUENCE, X86_FEATURE_SYSENTER32, \
- SYSCALL_SEQUENCE, X86_FEATURE_SYSCALL32
+ ALTERNATIVE_2(, SYSENTER_SEQUENCE, X86_FEATURE_SYSENTER32,
+ SYSCALL_SEQUENCE, X86_FEATURE_SYSCALL32)
#else
- ALTERNATIVE "", SYSENTER_SEQUENCE, X86_FEATURE_SEP
+ ALTERNATIVE(, SYSENTER_SEQUENCE, X86_FEATURE_SEP)
#endif
/* Enter using int $0x80 */
diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h
index e7636bac7372..60073947350d 100644
--- a/arch/x86/include/asm/alternative-asm.h
+++ b/arch/x86/include/asm/al...
2007 Apr 18
3
[patch] paravirt: VDSO page is essential
On Mon, 2007-03-05 at 13:06 +0100, Ingo Molnar wrote:
> Subject: [patch] paravirt: VDSO page is essential
> From: Ingo Molnar <mingo@elte.hu>
>
> commit 3bbf54725467d604698721384d858b5983b87e8f disables the VDSO for
> CONFIG_PARAVIRT kernels. This #ifdeffery was a bad change: the VDSO is
> an essential component of Linux, and this change forces all of them to
> use
2007 Apr 18
3
[patch] paravirt: VDSO page is essential
On Mon, 2007-03-05 at 13:06 +0100, Ingo Molnar wrote:
> Subject: [patch] paravirt: VDSO page is essential
> From: Ingo Molnar <mingo@elte.hu>
>
> commit 3bbf54725467d604698721384d858b5983b87e8f disables the VDSO for
> CONFIG_PARAVIRT kernels. This #ifdeffery was a bad change: the VDSO is
> an essential component of Linux, and this change forces all of them to
> use
2007 Aug 08
2
[PATCH] x86-64: syscall/sysenter support for 32-bit apps
...h/x86/traps.c 2007-08-08 11:37:08.000000000 +0200
@@ -609,16 +609,21 @@ static int emulate_forced_invalid_op(str
clear_bit(X86_FEATURE_DE, &d);
clear_bit(X86_FEATURE_PSE, &d);
clear_bit(X86_FEATURE_PGE, &d);
+ if ( !cpu_has_sep )
+ clear_bit(X86_FEATURE_SEP, &d);
+#ifdef __i386__
if ( !supervisor_mode_kernel )
clear_bit(X86_FEATURE_SEP, &d);
+#endif
if ( !IS_PRIV(current->domain) )
clear_bit(X86_FEATURE_MTRR, &d);
}
else if ( regs->eax == 0x80000001 )
{
/* Modify Fea...
2019 Mar 30
1
[PATCH 2/5] x86: Convert some slow-path static_cpu_has() callers to boot_cpu_has()
.../arch/x86/kernel/vm86_32.c
index a092b6b40c6b..6a38717d179c 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -369,7 +369,7 @@ static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus)
preempt_disable();
tsk->thread.sp0 += 16;
- if (static_cpu_has(X86_FEATURE_SEP)) {
+ if (boot_cpu_has(X86_FEATURE_SEP)) {
tsk->thread.sysenter_cs = 0;
refresh_sysenter_cs(&tsk->thread);
}
--
2.21.0
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
2007 Apr 18
1
[RFC, PATCH 7/24] i386 Vmi memory hole
Create a configurable hole in the linear address space at the top
of memory. A more advanced interface is needed to negotiate how
much space the hypervisor is allowed to steal, but in the end, it
seems most likely that a fixed constant size will be chosen for
the compiled kernel, potentially propagated to an information
page used by paravirtual initialization to determine interface
compatibility.
2007 Apr 18
1
[RFC, PATCH 7/24] i386 Vmi memory hole
Create a configurable hole in the linear address space at the top
of memory. A more advanced interface is needed to negotiate how
much space the hypervisor is allowed to steal, but in the end, it
seems most likely that a fixed constant size will be chosen for
the compiled kernel, potentially propagated to an information
page used by paravirtual initialization to determine interface
compatibility.
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...+=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,
+ &vsyscall_sysenter_start,
+ &vsyscall_sysenter_end - &vsyscall_sysenter_start);
=...
2007 Apr 18
1
[PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
...+=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,
+ &vsyscall_sysenter_start,
+ &vsyscall_sysenter_end - &vsyscall_sysenter_start);
=...
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...ll_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;
}
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_sysenter_start,
&vsyscall_sysenter_end - &vsyscall_sysent...
2007 Apr 18
1
[PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch
...ll_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;
}
- memcpy(page,
+ memcpy(syscall_page,
&vsyscall_sysenter_start,
&vsyscall_sysenter_end - &vsyscall_sysent...
2007 Apr 18
4
[patch 0/4] Clean up asm/bugs.h, identify_cpu() and update COMPAT_VDSO
Hi Andi,
Four patches:
- clean up asm/bugs.h, by moving all the C code into its own C file
- split identify_cpu() into boot and secondary variants, so that
boot-time setup functions can be marked __init
- repost of the COMPAT_VDSO patches with a bit more robustness from
unknown DT_tags, and functions marked __init, since all this is
boot-time only setup.
Thanks,
J
--
2007 Apr 18
4
[patch 0/4] Clean up asm/bugs.h, identify_cpu() and update COMPAT_VDSO
Hi Andi,
Four patches:
- clean up asm/bugs.h, by moving all the C code into its own C file
- split identify_cpu() into boot and secondary variants, so that
boot-time setup functions can be marked __init
- repost of the COMPAT_VDSO patches with a bit more robustness from
unknown DT_tags, and functions marked __init, since all this is
boot-time only setup.
Thanks,
J
--
2007 Apr 18
0
[PATCH 4/5] Vmi.patch
..."=d" (*edx)
+ : "0" (*eax), "2" (*ecx), "r" (vmi_ops.cpuid));
+ if (override) {
+ if (disable_pse)
+ *edx &= ~X86_FEATURE_PSE;
+ if (disable_pge)
+ *edx &= ~X86_FEATURE_PGE;
+ if (disable_sep)
+ *edx &= ~X86_FEATURE_SEP;
+ if (disable_tsc)
+ *edx &= ~X86_FEATURE_TSC;
+ if (disable_mtrr)
+ *edx &= ~X86_FEATURE_MTRR;
+ }
+}
+
+static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
+{
+ if (gdt[nr].a != new->a || gdt[nr].b != new->b)
+ write_gdt_entry(gdt,...
2007 Apr 18
0
[PATCH 4/5] Vmi.patch
..."=d" (*edx)
+ : "0" (*eax), "2" (*ecx), "r" (vmi_ops.cpuid));
+ if (override) {
+ if (disable_pse)
+ *edx &= ~X86_FEATURE_PSE;
+ if (disable_pge)
+ *edx &= ~X86_FEATURE_PGE;
+ if (disable_sep)
+ *edx &= ~X86_FEATURE_SEP;
+ if (disable_tsc)
+ *edx &= ~X86_FEATURE_TSC;
+ if (disable_mtrr)
+ *edx &= ~X86_FEATURE_MTRR;
+ }
+}
+
+static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
+{
+ if (gdt[nr].a != new->a || gdt[nr].b != new->b)
+ write_gdt_entry(gdt,...
2007 Apr 18
0
[PATCH 5/6] VMI backend for paravirt-ops
..."=d" (*edx)
+ : "0" (*eax), "2" (*ecx), "r" (vmi_ops.cpuid));
+ if (override) {
+ if (disable_pse)
+ *edx &= ~X86_FEATURE_PSE;
+ if (disable_pge)
+ *edx &= ~X86_FEATURE_PGE;
+ if (disable_sep)
+ *edx &= ~X86_FEATURE_SEP;
+ if (disable_tsc)
+ *edx &= ~X86_FEATURE_TSC;
+ if (disable_mtrr)
+ *edx &= ~X86_FEATURE_MTRR;
+ }
+}
+
+static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
+{
+ if (gdt[nr].a != new->a || gdt[nr].b != new->b)
+ write_gdt_entry(gdt,...