search for: preempt_stop

...@@ #include <asm/smp.h> #include <asm/page.h> #include <asm/desc.h> +#include <mach_asm.h> #include "irq_vectors.h" #define nr_syscalls ((syscall_table_size)/4) @@ -76,7 +77,7 @@ NT_MASK = 0x00004000 VM_MASK = 0x00020000 #ifdef CONFIG_PREEMPT -#define preempt_stop cli +#define preempt_stop CLI #else #define preempt_stop #define resume_kernel restore_nocheck @@ -148,7 +149,7 @@ ret_from_intr: testl $(VM_MASK | 3), %eax jz resume_kernel ENTRY(resume_userspace) - cli # make sure we don't miss an interrupt + CLI # make sure we don't mi...

...@@ #include <asm/smp.h> #include <asm/page.h> #include <asm/desc.h> +#include <mach_asm.h> #include "irq_vectors.h" #define nr_syscalls ((syscall_table_size)/4) @@ -76,7 +77,7 @@ NT_MASK = 0x00004000 VM_MASK = 0x00020000 #ifdef CONFIG_PREEMPT -#define preempt_stop cli +#define preempt_stop CLI #else #define preempt_stop #define resume_kernel restore_nocheck @@ -148,7 +149,7 @@ ret_from_intr: testl $(VM_MASK | 3), %eax jz resume_kernel ENTRY(resume_userspace) - cli # make sure we don't miss an interrupt + CLI # make sure we don't mi...

...t;irq_vectors.h" +#include "mach_asm.h" /* We do not recover from a stack overflow, but at least * we know it happened and should be able to track it down. */ @@ -88,7 +89,7 @@ NT_MASK = 0x00004000 VM_MASK = 0x00020000 #ifdef CONFIG_PREEMPT -#define preempt_stop cli +#define preempt_stop CLI #else #define preempt_stop #define resume_kernel restore_nocheck @@ -161,7 +162,7 @@ ret_from_intr: testl $(VM_MASK | 3), %eax jz resume_kernel ENTRY(resume_userspace) - cli # make sure we don't miss an interrupt + CLI # make sure we don't mi...

...t;irq_vectors.h" +#include "mach_asm.h" /* We do not recover from a stack overflow, but at least * we know it happened and should be able to track it down. */ @@ -88,7 +89,7 @@ NT_MASK = 0x00004000 VM_MASK = 0x00020000 #ifdef CONFIG_PREEMPT -#define preempt_stop cli +#define preempt_stop CLI #else #define preempt_stop #define resume_kernel restore_nocheck @@ -161,7 +162,7 @@ ret_from_intr: testl $(VM_MASK | 3), %eax jz resume_kernel ENTRY(resume_userspace) - cli # make sure we don't miss an interrupt + CLI # make sure we don't mi...

OK, this is the revised paravirt.h (Andi has seen this before), then the second is the binary patching stuff. More things get added to the paravirt struct in future patches, but this basic stuff hasn't changed for some time. ==== This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

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

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

Hi all, I've been looking at finding common ground between the VMI, Xen and other paravirtualization approaches, and after some discussion, we're getting somewhere. These first two patches are the fundamentals, stolen mainly from the VMI patches: removing assumptions about the kernel running in ring 0, and macro-izing all the obvious para-virtualize-needing insns. The third patch is

Hi all, I've been looking at finding common ground between the VMI, Xen and other paravirtualization approaches, and after some discussion, we're getting somewhere. These first two patches are the fundamentals, stolen mainly from the VMI patches: removing assumptions about the kernel running in ring 0, and macro-izing all the obvious para-virtualize-needing insns. The third patch is

...dx, %ds; \ movl %edx, %es; \ /* switch to 32bit stack */ \ @@ -500,7 +502,7 @@ ENTRY(simd_coprocessor_error) ENTRY(device_not_available) pushl $-1 # mark this as an int SAVE_ALL - movl %cr0, %eax + GET_CR0 testl $0x4, %eax # EM (math emulation bit) jne device_not_available_emulate preempt_stop @@ -557,6 +559,7 @@ debug_stack_correct: ENTRY(nmi) pushl %eax movl %ss, %eax + MASK_RPL(%ax) cmpw $__ESPFIX_SS, %ax popl %eax je nmi_16bit_stack Index: linux-2.6.13/include/asm-i386/mach-default/mach_asm.h =================================================================== --- linux-2.6...

...dx, %ds; \ movl %edx, %es; \ /* switch to 32bit stack */ \ @@ -500,7 +502,7 @@ ENTRY(simd_coprocessor_error) ENTRY(device_not_available) pushl $-1 # mark this as an int SAVE_ALL - movl %cr0, %eax + GET_CR0 testl $0x4, %eax # EM (math emulation bit) jne device_not_available_emulate preempt_stop @@ -557,6 +559,7 @@ debug_stack_correct: ENTRY(nmi) pushl %eax movl %ss, %eax + MASK_RPL(%ax) cmpw $__ESPFIX_SS, %ax popl %eax je nmi_16bit_stack Index: linux-2.6.13/include/asm-i386/mach-default/mach_asm.h =================================================================== --- linux-2.6...

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] 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. For the most part, these patches do nothing or very little. The patches should

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] 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. For the most part, these patches do nothing or very little. The patches should

...000 VM_MASK = 0x00020000 - -/* These are replaces for paravirtualization */ -#define DISABLE_INTERRUPTS cli -#define ENABLE_INTERRUPTS sti -#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit -#define INTERRUPT_RETURN iret -#define GET_CR0_INTO_EAX movl %cr0, %eax #ifdef CONFIG_PREEMPT #define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF =================================================================== --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h @@ -9,62 +9,12 @@ */ #ifndef _ASM_IRQFLAGS_H #define _ASM_IRQFLAGS_H +#include <asm/paravirt.h> #ifndef __ASSEMBLY...

...000 VM_MASK = 0x00020000 - -/* These are replaces for paravirtualization */ -#define DISABLE_INTERRUPTS cli -#define ENABLE_INTERRUPTS sti -#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit -#define INTERRUPT_RETURN iret -#define GET_CR0_INTO_EAX movl %cr0, %eax #ifdef CONFIG_PREEMPT #define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF =================================================================== --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h @@ -9,62 +9,12 @@ */ #ifndef _ASM_IRQFLAGS_H #define _ASM_IRQFLAGS_H +#include <asm/paravirt.h> #ifndef __ASSEMBLY...

...000 VM_MASK = 0x00020000 -/* These are replaces for paravirtualization */ -#define DISABLE_INTERRUPTS cli -#define ENABLE_INTERRUPTS sti -#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit -#define INTERRUPT_RETURN iret -#define GET_CR0_INTO_EAX movl %cr0, %eax - #ifdef CONFIG_PREEMPT #define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF #else @@ -809,6 +802,19 @@ 1: INTERRUPT_RETURN .long 1b,iret_exc .previous +#ifdef CONFIG_PARAVIRT +ENTRY(nopara_iret) +1: iret +.section __ex_table,"a" + .align 4 + .long 1b,iret_exc +.previous + +ENTRY(nopara_irq_enable_sysexit) + sti + sysexit...

...000 VM_MASK = 0x00020000 -/* These are replaces for paravirtualization */ -#define DISABLE_INTERRUPTS cli -#define ENABLE_INTERRUPTS sti -#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit -#define INTERRUPT_RETURN iret -#define GET_CR0_INTO_EAX movl %cr0, %eax - #ifdef CONFIG_PREEMPT #define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF #else @@ -809,6 +802,19 @@ 1: INTERRUPT_RETURN .long 1b,iret_exc .previous +#ifdef CONFIG_PARAVIRT +ENTRY(nopara_iret) +1: iret +.section __ex_table,"a" + .align 4 + .long 1b,iret_exc +.previous + +ENTRY(nopara_irq_enable_sysexit) + sti + sysexit...

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths