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Re: [PATCH] x86/xen: fix booting 32-bit pv guest
- To: Juergen Gross <jgross@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Thu, 9 Apr 2020 10:44:25 -0400
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- Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>
- Delivery-date: Thu, 09 Apr 2020 14:44:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 4/9/20 3:00 AM, Juergen Gross wrote:
> Commit 2f62f36e62daec ("x86/xen: Make the boot CPU idle task reliable")
> introduced a regression for booting 32 bit Xen PV guests: the address
> of the initial stack needs to be a virtual one.
>
> Fixes: 2f62f36e62daec ("x86/xen: Make the boot CPU idle task reliable")
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> ---
> arch/x86/xen/xen-head.S | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
> index 7d1c4fcbe8f7..1ba601df3a37 100644
> --- a/arch/x86/xen/xen-head.S
> +++ b/arch/x86/xen/xen-head.S
> @@ -38,7 +38,7 @@ SYM_CODE_START(startup_xen)
> #ifdef CONFIG_X86_64
While at it, I'd swap the ifdefs and fold x86_64 case into the one below.
> mov initial_stack(%rip), %rsp
> #else
> - mov pa(initial_stack), %esp
> + mov initial_stack, %esp
> #endif
>
> #ifdef CONFIG_X86_64
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