similar to: [PATCH] linux-2.6.18/x86: improve CR0 read/write handling

Hi all I recently started to write a matrix exponentiation operator for R (by adding a new operator definition to names.c, and adding the following code to arrays.c). It is not finished yet, but I would like to solicit some comments, as there are a few areas of R's internals that I am still feeling my way around. Firstly: 1) Would there be interest in adding a new operator %^% that performs

Fairly straightforward code motion in system.h into the sub-arch layer. Affected functionality include control register accessors, which are virtualizable but with great overhead due to the #GP cost; wbinvd, and most importantly, halt and interrupt control, which is non-virtualizable. Since read_cr4_safe can never fault on a VMI kernel (P5+ processor is required for VMI), we can omit the fault

Fairly straightforward code motion in system.h into the sub-arch layer. Affected functionality include control register accessors, which are virtualizable but with great overhead due to the #GP cost; wbinvd, and most importantly, halt and interrupt control, which is non-virtualizable. Since read_cr4_safe can never fault on a VMI kernel (P5+ processor is required for VMI), we can omit the fault

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

plain text document attachment (xx-paravirt-processor-header.patch) System routine updates for the paravirt_ops interface. Signed-off-by: Steven Rostedt srostedt@redhat.com Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Index: clean-start/include/asm-x86_64/processor.h =================================================================== ---

plain text document attachment (xx-paravirt-processor-header.patch) System routine updates for the paravirt_ops interface. Signed-off-by: Steven Rostedt srostedt@redhat.com Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Index: clean-start/include/asm-x86_64/processor.h =================================================================== ---

Hi all, I have the following configuration: _______ +------------+ / diginet link | | | +-------------+ Provider 1 +------- __ | | | / ___/ \_

From: Joerg Roedel <jroedel at suse.de> Building a correct GHCB for the hypervisor requires setting valid bits in the GHCB. Simplify that process by providing accessor functions to set values and to update the valid bitmap. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/svm.h | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)

From: Joerg Roedel <jroedel at suse.de> Building a correct GHCB for the hypervisor requires setting valid bits in the GHCB. Simplify that process by providing accessor functions to set values and to update the valid bitmap. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/svm.h | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)

From: Joerg Roedel <jroedel at suse.de> Building a correct GHCB for the hypervisor requires setting valid bits in the GHCB. Simplify that process by providing accessor functions to set values and to update the valid bitmap and to check the valid bitmap in KVM. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/svm.h | 43 ++++++++++++++++++++++++++++++++++++++

Hi guys, The PV ABI of xen will clear CR0.TS before trapping into the PV guest kernel's exception handler, so the exception handler in guest kernel runs with CR0.TS clear at the very beginning (which is different with on baremetal). In Xenolinux and mainline Linux kernel before 2.6.26 everything is fine since they don't sleep nor enable interrupts during the handler, however the current

Hi guys, The PV ABI of xen will clear CR0.TS before trapping into the PV guest kernel's exception handler, so the exception handler in guest kernel runs with CR0.TS clear at the very beginning (which is different with on baremetal). In Xenolinux and mainline Linux kernel before 2.6.26 everything is fine since they don't sleep nor enable interrupts during the handler, however the current

From: Mihai Don?u <mdontu at bitdefender.com> The introspection requests (KVM_REQ_INTROSPECTION) are checked before entering guest or when the vCPU is halted. Signed-off-by: Mihai Don?u <mdontu at bitdefender.com> Co-developed-by: Mircea C?rjaliu <mcirjaliu at bitdefender.com> Signed-off-by: Mircea C?rjaliu <mcirjaliu at bitdefender.com> Co-developed-by: Adalbert Laz?r

NAME xx - twice as dirty SYNOPSIS ~ > gem install "double x" require "xx" include XX::XHTML doc = xhtml_{ html_{ head_{ title_{ " go xx! " } } body_{ " one more and it would be illegal " } } } URI http://rubyforge.org/frs/?group_id=1024 DESCRIPTION xx is a library designed to extend ruby objects

This version over last version: (1) Gets rid of the no_paravirt.h header and leaves native ops in place (with some reshuffling to keep then under one #ifdef). (2) Fixes the "X crashes with CONFIG_PARAVIRT=y" bug. (3) Puts __ex_table entry in paravirt iret. Another followup patch implements binary patching... Rusty. === Create a paravirt.h header for all the critical operations which

This version over last version: (1) Gets rid of the no_paravirt.h header and leaves native ops in place (with some reshuffling to keep then under one #ifdef). (2) Fixes the "X crashes with CONFIG_PARAVIRT=y" bug. (3) Puts __ex_table entry in paravirt iret. Another followup patch implements binary patching... Rusty. === Create a paravirt.h header for all the critical operations which

Hi, At x86_64 linux domain, phys_to_machine_mapping, pfn_to_mfn_frame_list_list, and pfn_to_mfn_frame_list should be aligned to pagesize, but it can be misaligned now. If they aren''t aligned to pagesize, it will cause fails while saving the domain. This patch fixed it. regards, Signed-off-by: Kazuo Moriwaka <moriwaka@valinux.co.jp> set phys_to_machine_mapping alignment to

Hello! I have a slight problem in my guest port with the WP bit in CR0. The original kernel maps certain kernel pages to user-mode read-only and relies on the kernel being able to modify these despite the read-only bit being set in the pages. This in turn requires that the WP bit is unset in CR0. Unfortunately, Xen doesn''t allow the WP bit to be zeroed because Xen wants to share pages

Make GDT page aligned and page padded to support running inside of a hypervisor. This prevents false sharing of the GDT page with other hot data, which is not allowed in Xen, and causes performance problems in VMware. Rather than go back to the old method of statically allocating the GDT (which wastes unneded space for non-present CPUs), the GDT for APs is allocated dynamically. Signed-off-by: