search for: startup_paravirt

Some concern was expressed over the lguest review status, so I shall send the patches out again for people to review, to test, to make observations about the author's personal appearance, etc. I'll plan on sending these patches off to Linus in a week's time, assuming all goes well. Thanks. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body

Some concern was expressed over the lguest review status, so I shall send the patches out again for people to review, to test, to make observations about the author's personal appearance, etc. I'll plan on sending these patches off to Linus in a week's time, assuming all goes well. Thanks. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body

...ow I'm a little frustrated that insanity below slipped into head.S right after the 32bit entry point after the review said use the normal linux parameters for parameter passing. > #ifdef CONFIG_PARAVIRT > movl %cs, %eax > testl $0x3, %eax > jnz startup_paravirt > #endif The whole thing should be based on a value in the linux parameter block pointed to by %esi, instead of the insane preserve all registers and attempt to be super compatible with everyone. Yes we do need a branch there, but no we don't need to be changing the format w...

...ow I'm a little frustrated that insanity below slipped into head.S right after the 32bit entry point after the review said use the normal linux parameters for parameter passing. > #ifdef CONFIG_PARAVIRT > movl %cs, %eax > testl $0x3, %eax > jnz startup_paravirt > #endif The whole thing should be based on a value in the linux parameter block pointed to by %esi, instead of the insane preserve all registers and attempt to be super compatible with everyone. Yes we do need a branch there, but no we don't need to be changing the format w...

I've updated the patches at http://ozlabs.org/~rusty/paravirt/?mf=33ba6c4fce13;path=/ to carve out the basic shape of how I see all this fitting together. These patches implement an initial set of Xen paravirt ops, as well as adapting head.S to set up a Xen-specific entrypoint. The head.S code does absolutely minimal setup, and then calls xen_start_kernel(). This installs the Xen

...y-mapped pages on setup so define __START_KERNEL to @@ -106,6 +113,14 @@ startup_64: * reload the page tables here. */ +#ifdef CONFIG_PARAVIRT + /* a CS ended in 0x3 indicates we're in userspace. That's where + * our paravirt guests run. */ + movq %cs, %rax + testq $0x3, %rax + jnz startup_paravirt +#endif + /* Enable PAE mode and PGE */ xorq %rax, %rax btsq $5, %rax @@ -208,10 +223,11 @@ ENTRY(early_idt_handler) cmpl $2,early_recursion_flag(%rip) jz 1f incl early_recursion_flag(%rip) - xorl %eax,%eax movq 8(%rsp),%rsi # get rip movq (%rsp),%rdx - movq %cr2,%rcx + GET_CR2_INT...

...y-mapped pages on setup so define __START_KERNEL to @@ -106,6 +113,14 @@ startup_64: * reload the page tables here. */ +#ifdef CONFIG_PARAVIRT + /* a CS ended in 0x3 indicates we're in userspace. That's where + * our paravirt guests run. */ + movq %cs, %rax + testq $0x3, %rax + jnz startup_paravirt +#endif + /* Enable PAE mode and PGE */ xorq %rax, %rax btsq $5, %rax @@ -208,10 +223,11 @@ ENTRY(early_idt_handler) cmpl $2,early_recursion_flag(%rip) jz 1f incl early_recursion_flag(%rip) - xorl %eax,%eax movq 8(%rsp),%rsi # get rip movq (%rsp),%rdx - movq %cr2,%rcx + GET_CR2_INT...

This patch series is against 2.6.20; some things are in flux, so there might be issues as other things flow into the latest -git tree. >From the documentation: Lguest is designed to be a minimal hypervisor for the Linux kernel, for Linux developers and users to experiment with virtualization with the minimum of complexity. Nonetheless, it should have sufficient features to make it useful for

This patch series is against 2.6.20; some things are in flux, so there might be issues as other things flow into the latest -git tree. >From the documentation: Lguest is designed to be a minimal hypervisor for the Linux kernel, for Linux developers and users to experiment with virtualization with the minimum of complexity. Nonetheless, it should have sufficient features to make it useful for

...ther paravirt_ops structs: see head.S obj-$(CONFIG_PARAVIRT) += paravirt.o EXTRA_AFLAGS := -traditional diff -r 4fb7fc327801 arch/i386/kernel/head.S --- a/arch/i386/kernel/head.S Mon Feb 12 12:37:01 2007 +1100 +++ b/arch/i386/kernel/head.S Mon Feb 12 12:54:19 2007 +1100 @@ -513,10 +513,11 @@ startup_paravirt: pushl %ecx pushl %eax - /* paravirt.o is last in link, and that probe fn never returns */ pushl $__start_paravirtprobe 1: movl 0(%esp), %eax + cmpl $__stop_paravirtprobe, %eax + je unhandled_paravirt pushl (%eax) movl 8(%esp), %eax call *(%esp) @@ -528,6 +529,10 @@ 1: addl $4,...

...ther paravirt_ops structs: see head.S obj-$(CONFIG_PARAVIRT) += paravirt.o EXTRA_AFLAGS := -traditional diff -r 4fb7fc327801 arch/i386/kernel/head.S --- a/arch/i386/kernel/head.S Mon Feb 12 12:37:01 2007 +1100 +++ b/arch/i386/kernel/head.S Mon Feb 12 12:54:19 2007 +1100 @@ -513,10 +513,11 @@ startup_paravirt: pushl %ecx pushl %eax - /* paravirt.o is last in link, and that probe fn never returns */ pushl $__start_paravirtprobe 1: movl 0(%esp), %eax + cmpl $__stop_paravirtprobe, %eax + je unhandled_paravirt pushl (%eax) movl 8(%esp), %eax call *(%esp) @@ -528,6 +529,10 @@ 1: addl $4,...

...wever, I took the opportunity to write some new less important pieces of code, highlighting: * proper casts in places in which macros were replaced by functions, and the arguments happened to mismatch types. * calling paravirt_ops functions from .S files (I lacked this last time) * addition of the startup_paravirt function, to kick off guests (not tested) * fixed problems with patching * added a new field, vsyscall_page in the paravirt_ops struct, which allows the kernel to map a vsyscall_page on its own * fixed vsyscall functions to avoid calling paravirt_ops functions. __vsyscall_0 is the page to be mappe...

...wever, I took the opportunity to write some new less important pieces of code, highlighting: * proper casts in places in which macros were replaced by functions, and the arguments happened to mismatch types. * calling paravirt_ops functions from .S files (I lacked this last time) * addition of the startup_paravirt function, to kick off guests (not tested) * fixed problems with patching * added a new field, vsyscall_page in the paravirt_ops struct, which allows the kernel to map a vsyscall_page on its own * fixed vsyscall functions to avoid calling paravirt_ops functions. __vsyscall_0 is the page to be mappe...

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

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

This patch series implements the Linux Xen guest in terms of the paravirt-ops interface. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen console * virtual block

Hi Andi, This patch series implements the Linux Xen guest as a paravirt_ops backend. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen hvc console (console=hvc0) *

Hi Andi, This patch series implements the Linux Xen guest as a paravirt_ops backend. The features in implemented this patch series are: * domU only * UP only (most code is SMP-safe, but there's no way to create a new vcpu) * writable pagetables, with late pinning/early unpinning (no shadow pagetable support) * supports both PAE and non-PAE modes * xen hvc console (console=hvc0) *