From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@suse.de>,
x86@kernel.org
Subject: Re: [PATCH] x86/tdx: Fix tdx asm
Date: Fri, 20 May 2022 16:59:52 +0300 [thread overview]
Message-ID: <20220520135952.umeymprcfrkkc4wt@black.fi.intel.com> (raw)
In-Reply-To: <20220520083839.GR2578@worktop.programming.kicks-ass.net>
On Fri, May 20, 2022 at 10:38:39AM +0200, Peter Zijlstra wrote:
> On Sat, Apr 09, 2022 at 01:27:41AM -0000, tip-bot2 for Kuppuswamy Sathyanarayanan wrote:
> > +SYM_FUNC_START(__tdx_module_call)
> > + FRAME_BEGIN
> > + TDX_MODULE_CALL host=0
> > + FRAME_END
> > + ret
> > +SYM_FUNC_END(__tdx_module_call)
>
> > +SYM_FUNC_START(__tdx_hypercall)
>
> > +
> > + retq
> > +.Lpanic:
> > + call __tdx_hypercall_failed
> > + /* __tdx_hypercall_failed never returns */
> > + jmp .Lpanic
> > +SYM_FUNC_END(__tdx_hypercall)
>
> :-(
>
> ---
> Subject: x86/tdx: Fix tdx asm
>
> Because build-testing is over-rated, a few trivial objtool complaints:
>
> vmlinux.o: warning: objtool: __tdx_module_call+0x3e: missing int3 after ret
> vmlinux.o: warning: objtool: __tdx_hypercall+0x6e: missing int3 after ret
>
> Fixes: eb94f1b6a70a ("x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions")
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Oopsie :(
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> ---
> arch/x86/coco/tdx/tdcall.S | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/coco/tdx/tdcall.S b/arch/x86/coco/tdx/tdcall.S
> index eeb4511dc414..f9eb1134f22d 100644
> --- a/arch/x86/coco/tdx/tdcall.S
> +++ b/arch/x86/coco/tdx/tdcall.S
> @@ -73,7 +73,7 @@ SYM_FUNC_START(__tdx_module_call)
> FRAME_BEGIN
> TDX_MODULE_CALL host=0
> FRAME_END
> - ret
> + RET
> SYM_FUNC_END(__tdx_module_call)
>
> /*
> @@ -196,7 +196,7 @@ SYM_FUNC_START(__tdx_hypercall)
>
> FRAME_END
>
> - retq
> + RET
> .Lpanic:
> call __tdx_hypercall_failed
> /* __tdx_hypercall_failed never returns */
>
--
Kirill A. Shutemov
next prev parent reply other threads:[~2022-05-20 14:00 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-05 23:29 [PATCHv8 00/30] TDX Guest: TDX core support Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 01/30] x86/tdx: Detect running as a TDX guest in early boot Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 02/30] x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 03/30] x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-05-20 8:38 ` [PATCH] x86/tdx: Fix tdx asm Peter Zijlstra
2022-05-20 11:00 ` [tip: x86/tdx] x86/tdx: Fix RETs in TDX asm tip-bot2 for Peter Zijlstra
2022-05-20 13:59 ` Kirill A. Shutemov [this message]
2022-04-05 23:29 ` [PATCHv8 04/30] x86/tdx: Extend the confidential computing API to support TDX guests Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 05/30] x86/tdx: Exclude shared bit from __PHYSICAL_MASK Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 06/30] x86/traps: Refactor exc_general_protection() Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 07/30] x86/traps: Add #VE support for TDX guest Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 08/30] x86/tdx: Add HLT support for TDX guests Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 09/30] x86/tdx: Add MSR " Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 10/30] x86/tdx: Handle CPUID via #VE Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 11/30] x86/tdx: Handle in-kernel MMIO Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 12/30] x86/tdx: Detect TDX at early kernel decompression time Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 13/30] x86: Adjust types used in port I/O helpers Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 14/30] x86: Consolidate " Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-10 10:58 ` [PATCHv8 14/30] " Borislav Petkov
2022-04-10 20:00 ` Kirill A. Shutemov
2022-04-10 20:37 ` Borislav Petkov
2022-04-11 7:49 ` [tip: x86/tdx] x86/kaslr: Fix build warning in KASLR code in boot stub tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 15/30] x86/boot: Port I/O: allow to hook up alternative helpers Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/boot: Port I/O: Allow " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 16/30] x86/boot: Port I/O: add decompression-time support for TDX Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/boot: Port I/O: Add " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 17/30] x86/tdx: Port I/O: add runtime hypercalls Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/tdx: Port I/O: Add " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 18/30] x86/tdx: Port I/O: add early boot support Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/tdx: Port I/O: Add " tip-bot2 for Andi Kleen
2022-04-05 23:29 ` [PATCHv8 19/30] x86/tdx: Wire up KVM hypercalls Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 20/30] x86/boot: Add a trampoline for booting APs via firmware handoff Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Sean Christopherson
2022-04-05 23:29 ` [PATCHv8 21/30] x86/acpi, x86/boot: Add multiprocessor wake-up support Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/acpi/x86/boot: " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 22/30] x86/boot: Set CR0.NE early and keep it set during the boot Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 23/30] x86/boot: Avoid #VE during boot for TDX platforms Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Sean Christopherson
2022-04-05 23:29 ` [PATCHv8 24/30] x86/topology: Disable CPU online/offline control for TDX guests Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-05 23:29 ` [PATCHv8 25/30] x86/tdx: Make pages shared in ioremap() Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 26/30] x86/mm/cpa: Add support for TDX shared memory Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 27/30] x86/mm: Make DMA memory shared for TD guest Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 28/30] x86/tdx: ioapic: Add shared bit for IOAPIC base address Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] x86/tdx/ioapic: " tip-bot2 for Isaku Yamahata
2022-04-05 23:29 ` [PATCHv8 29/30] ACPICA: Avoid cache flush inside virtual machines Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kirill A. Shutemov
2022-04-05 23:29 ` [PATCHv8 30/30] Documentation/x86: Document TDX kernel architecture Kirill A. Shutemov
2022-04-09 1:27 ` [tip: x86/tdx] " tip-bot2 for Kuppuswamy Sathyanarayanan
2022-04-07 16:36 ` [PATCHv8 00/30] TDX Guest: TDX core support Dave Hansen
2022-04-07 16:50 ` Sean Christopherson
2022-04-07 17:42 ` Tom Lendacky
2022-04-07 17:47 ` Kirill A. Shutemov
2022-04-07 18:53 ` Sean Christopherson
2022-04-08 11:01 ` Kirill A. Shutemov
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