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Message-ID: <82b27eafe952c9f5a8ea6a8bcd902a38e2b2c77a.camel@surriel.com>
Subject: Re: [RFC PATCH 1/5] entry: Pass pt_regs to
 irqentry_exit_cond_resched()
From:   Rik van Riel <riel@surriel.com>
To:     ira.weiny@intel.com, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@intel.com>
Cc:     Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, kernel-team@fb.com
Date:   Fri, 05 Aug 2022 14:33:32 -0400
In-Reply-To: <20220805173009.3128098-2-ira.weiny@intel.com>
References: <20220805173009.3128098-1-ira.weiny@intel.com>
         <20220805173009.3128098-2-ira.weiny@intel.com>
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On Fri, 2022-08-05 at 10:30 -0700, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
>=20
> Auxiliary pt_regs space needs to be manipulated by the generic
> entry/exit code.
>=20
> Ideally irqentry_exit() would take care of handling any auxiliary
> pt_regs on exit.=C2=A0 Unfortunately, irqentry_exit() is not the only exi=
t
> from exception path.=C2=A0 The call to irqentry_exit_cond_resched() from
> xen_pv_evtchn_do_upcall() bypasses irqentry_exit().
>=20
> Make irqentry_exit_cond_resched() symmetrical with irqentry_enter()
> by
> passing pt_regs to it.=C2=A0 This makes irqentry_exit_cond_resched()
> capable
> of handling auxiliary pt_regs in future patches.
>=20
> Cc: Rik van Riel <riel@surriel.com>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Acked-by: Rik van Riel <riel@surriel.com>

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