RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

> -Original Message- > From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] > Sent: 2012年10月10日 18:02 > > > So I looked at why you are seeing the problem with v2.6.32 but not > > > with the recent kernels. And I think I found out the reason. > > > > I want to know what masking IO-APIC

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

> -Original Message- > From: H. Peter Anvin [mailto:h...@zytor.com] > Sent: 2012年10月10日 23:27 > To: Zhang, Lin-Bao (Linux Kernel R); Suresh Siddha > Cc: linux-kernel@vger.kernel.org; a...@lxorguk.ukuu.org.uk; > mi...@redhat.com; Croxon, Nigel; t...@linutronix.de; x...@kernel.org; >

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

-Original Message- From: H. Peter Anvin [mailto:h...@zytor.com] Sent: 2012年10月10日 23:27 To: Zhang, Lin-Bao (Linux Kernel RD); Suresh Siddha Cc: linux-kernel@vger.kernel.org; a...@lxorguk.ukuu.org.uk; mi...@redhat.com; Croxon, Nigel; t...@linutronix.de; x...@kernel.org;

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

-Original Message- From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] Sent: 2012年10月10日 18:02 So I looked at why you are seeing the problem with v2.6.32 but not with the recent kernels. And I think I found out the reason. I want to know what masking IO-APIC means? As

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

OSV = Operating System Vendor ime. red Hat, SUSE etc. "Zhang, Lin-Bao (Linux Kernel R)" wrote: > >> -Original Message- >> From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] >> > > Can you please apply the appended patch to 2.6.32 kernel and see >if >> > > the issue you mentioned

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

> -Original Message- > From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] > > > Can you please apply the appended patch to 2.6.32 kernel and see if > > > the issue you mentioned gets fixed? If so, we can ask the -stable > > > and OSV's teams to pick up this fix. > > Yes , it can

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Wed, 2012-10-10 at 00:26 +, Zhang, Lin-Bao (Linux Kernel R) wrote: > So , we can think ,as your patch , during the window , IO-apic is > useless or we can think IO-APIC doesn't exist ? > Could you mind please sharing your design details ? thanks very much! Between the window of

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Wed, 2012-10-10 at 16:02 -0700, Zhang, Lin-Bao (Linux Kernel R) wrote: > > As I mentioned earlier, the current design already ensures that all the > > IO-APIC > > RTE's are masked between the time we enable interrupt-remapping to the time > > when the IO-APIC RTE's are configured correctly. >

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Now , I want to clarify 2 type of errors : a) some interrupt doesn't work through Interrupt -remapped IO-APIC. b) an interrupt is coming , there is an IO-APIC entry to know how to route it to which CPU, but VT-d entry is empty, ITP will report Present bit is clear. BIOS should

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Now , I want to clarify 2 type of errors : a) some interrupt doesn't work through Interrupt -remapped IO-APIC. b) an interrupt is coming , there is an IO-APIC entry to know how to route it to which CPU, but VT-d entry is empty, ITP will report Present bit is clear. BIOS should

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Wed, 2012-10-10 at 16:02 -0700, Zhang, Lin-Bao (Linux Kernel RD) wrote: As I mentioned earlier, the current design already ensures that all the IO-APIC RTE's are masked between the time we enable interrupt-remapping to the time when the IO-APIC RTE's are configured correctly. So I

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Wed, 2012-10-10 at 00:26 +, Zhang, Lin-Bao (Linux Kernel RD) wrote: So , we can think ,as your patch , during the window , IO-apic is useless or we can think IO-APIC doesn't exist ? Could you mind please sharing your design details ? thanks very much! Between the window of

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

-Original Message- From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] Can you please apply the appended patch to 2.6.32 kernel and see if the issue you mentioned gets fixed? If so, we can ask the -stable and OSV's teams to pick up this fix. Yes , it can resolve current

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

OSV = Operating System Vendor ime. red Hat, SUSE etc. Zhang, Lin-Bao (Linux Kernel RD) linbao.zh...@hp.com wrote: -Original Message- From: Suresh Siddha [mailto:suresh.b.sid...@intel.com] Can you please apply the appended patch to 2.6.32 kernel and see if the issue you mentioned

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Thanks very much for your reply! I tested this patch in 2.6.32 with our machine , it can indeed can resolve current issue. that 's good. I also check 3.x version of kernel source , for example , 3.3.8 and 3.0.0 , they indeed include similar patch , I think the key action

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Thanks very much for your reply! I tested this patch in 2.6.32 with our machine , it can indeed can resolve current issue. that 's good. I also check 3.x version of kernel source , for example , 3.3.8 and 3.0.0 , they indeed include similar patch , I think the key action

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Sun, 2012-10-07 at 21:53 -0700, Zhang, Lin-Bao (Linux Kernel R) wrote: > Hi Suresh, > Could you please update current status about these 2 files and patch? > I am not sure if I have answered your questions , if not ,feel free to let me > know. > This is my first time to submit patch to LKML,

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

On Sun, 2012-10-07 at 21:53 -0700, Zhang, Lin-Bao (Linux Kernel RD) wrote: Hi Suresh, Could you please update current status about these 2 files and patch? I am not sure if I have answered your questions , if not ,feel free to let me know. This is my first time to submit patch to LKML, so

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Could you please update current status about these 2 files and patch? I am not sure if I have answered your questions , if not ,feel free to let me know. This is my first time to submit patch to LKML, so what should I do next step ? About this patch , where needs to be enhanced ?

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi Suresh, Could you please update current status about these 2 files and patch? I am not sure if I have answered your questions , if not ,feel free to let me know. This is my first time to submit patch to LKML, so what should I do next step ? About this patch , where needs to be enhanced ?

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi suresh, Thanks for your reply and review this patch. I also cc other maintainers of arch/x86/kernel/smpboot.c and arch/x86/kernel/apic/apic.c(getting them by get_maintainer.pl script, hopefully I have not disturbed many people , if yes ,sorry first) > -Original Message- > From:

RE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )

Hi suresh, Thanks for your reply and review this patch. I also cc other maintainers of arch/x86/kernel/smpboot.c and arch/x86/kernel/apic/apic.c(getting them by get_maintainer.pl script, hopefully I have not disturbed many people , if yes ,sorry first) -Original Message- From: