* [PATCH] x86/hyperv/vtl: Add noop for realmode pointers
@ 2023-04-24 10:10 Saurabh Sengar
2023-05-01 16:57 ` Michael Kelley (LINUX)
0 siblings, 1 reply; 3+ messages in thread
From: Saurabh Sengar @ 2023-04-24 10:10 UTC (permalink / raw)
To: tglx, mingo, bp, dave.hansen, x86, hpa, kys, haiyangz, wei.liu,
decui, mikelley, ssengar, linux-kernel, linux-hyperv
Assign the realmode pointers to noop, instead of NULL to fix kernel panic.
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
---
arch/x86/hyperv/hv_vtl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c
index 1ba5d3b99b16..85d38b9f3586 100644
--- a/arch/x86/hyperv/hv_vtl.c
+++ b/arch/x86/hyperv/hv_vtl.c
@@ -20,6 +20,8 @@ void __init hv_vtl_init_platform(void)
{
pr_info("Linux runs in Hyper-V Virtual Trust Level\n");
+ x86_platform.realmode_reserve = x86_init_noop;
+ x86_platform.realmode_init = x86_init_noop;
x86_init.irqs.pre_vector_init = x86_init_noop;
x86_init.timers.timer_init = x86_init_noop;
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* RE: [PATCH] x86/hyperv/vtl: Add noop for realmode pointers
2023-04-24 10:10 [PATCH] x86/hyperv/vtl: Add noop for realmode pointers Saurabh Sengar
@ 2023-05-01 16:57 ` Michael Kelley (LINUX)
2023-05-08 16:47 ` Wei Liu
0 siblings, 1 reply; 3+ messages in thread
From: Michael Kelley (LINUX) @ 2023-05-01 16:57 UTC (permalink / raw)
To: Saurabh Sengar, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
hpa@zytor.com, KY Srinivasan, Haiyang Zhang, wei.liu@kernel.org,
Dexuan Cui, Saurabh Singh Sengar, linux-kernel@vger.kernel.org,
linux-hyperv@vger.kernel.org
From: Saurabh Sengar <ssengar@linux.microsoft.com> Sent: Monday, April 24, 2023 3:10 AM
>
> Assign the realmode pointers to noop, instead of NULL to fix kernel panic.
>
> Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
> ---
> arch/x86/hyperv/hv_vtl.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c
> index 1ba5d3b99b16..85d38b9f3586 100644
> --- a/arch/x86/hyperv/hv_vtl.c
> +++ b/arch/x86/hyperv/hv_vtl.c
> @@ -20,6 +20,8 @@ void __init hv_vtl_init_platform(void)
> {
> pr_info("Linux runs in Hyper-V Virtual Trust Level\n");
>
> + x86_platform.realmode_reserve = x86_init_noop;
> + x86_platform.realmode_init = x86_init_noop;
> x86_init.irqs.pre_vector_init = x86_init_noop;
> x86_init.timers.timer_init = x86_init_noop;
>
> --
> 2.34.1
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] x86/hyperv/vtl: Add noop for realmode pointers
2023-05-01 16:57 ` Michael Kelley (LINUX)
@ 2023-05-08 16:47 ` Wei Liu
0 siblings, 0 replies; 3+ messages in thread
From: Wei Liu @ 2023-05-08 16:47 UTC (permalink / raw)
To: Michael Kelley (LINUX)
Cc: Saurabh Sengar, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
hpa@zytor.com, KY Srinivasan, Haiyang Zhang, wei.liu@kernel.org,
Dexuan Cui, Saurabh Singh Sengar, linux-kernel@vger.kernel.org,
linux-hyperv@vger.kernel.org
On Mon, May 01, 2023 at 04:57:56PM +0000, Michael Kelley (LINUX) wrote:
> From: Saurabh Sengar <ssengar@linux.microsoft.com> Sent: Monday, April 24, 2023 3:10 AM
> >
> > Assign the realmode pointers to noop, instead of NULL to fix kernel panic.
> >
> > Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
> > ---
> > arch/x86/hyperv/hv_vtl.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c
> > index 1ba5d3b99b16..85d38b9f3586 100644
> > --- a/arch/x86/hyperv/hv_vtl.c
> > +++ b/arch/x86/hyperv/hv_vtl.c
> > @@ -20,6 +20,8 @@ void __init hv_vtl_init_platform(void)
> > {
> > pr_info("Linux runs in Hyper-V Virtual Trust Level\n");
> >
> > + x86_platform.realmode_reserve = x86_init_noop;
> > + x86_platform.realmode_init = x86_init_noop;
> > x86_init.irqs.pre_vector_init = x86_init_noop;
> > x86_init.timers.timer_init = x86_init_noop;
> >
> > --
> > 2.34.1
>
> Reviewed-by: Michael Kelley <mikelley@microsoft.com>
>
Applied to hyperv-fixes. Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-04-24 10:10 [PATCH] x86/hyperv/vtl: Add noop for realmode pointers Saurabh Sengar
2023-05-01 16:57 ` Michael Kelley (LINUX)
2023-05-08 16:47 ` Wei Liu
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