From: Ashish Kalra <ashish.kalra@amd.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Thomas.Lendacky@amd.com, brijesh.singh@amd.com,
dave.hansen@linux-intel.com, peterz@infradead.org,
x86@kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, mingo@redhat.com, bp@alien8.de,
luto@kernel.org, hpa@zytor.com,
Konrad Rzeszutek Wilk <konrad@darnok.org>,
tglx@linutronix.de, hch@lst.de
Subject: Re: [PATCH v2] swiotlb: Adjust SWIOTBL bounce buffer size for SEV guests.
Date: Thu, 12 Mar 2020 00:43:02 +0000 [thread overview]
Message-ID: <20200312004302.GB26448@ashkalra_ubuntu_server> (raw)
In-Reply-To: <20200303170353.GC31627@char.us.oracle.com>
On Tue, Mar 03, 2020 at 12:03:53PM -0500, Konrad Rzeszutek Wilk wrote:
> > >
> > > >>
> > > >> Actually you seem to be piggybacking on pci_swiotlb_detect_4gb - so
> > > >> perhaps add in this code ? Albeit it really should be in it's own
> > > >> file, not in arch/x86/kernel/pci-swiotlb.c
> > >
> > > Actually, we piggyback on pci_swiotlb_detect_override which sets
> > > swiotlb=1 as x86_64_start_kernel() and invocation of sme_early_init()
> > > forces swiotlb on, but again this is all x86 architecture specific.
>
> Then it looks like the best bet is to do it from within swiotlb_init?
> We really can't do it from swiotlb_size_or_default - that function
> should just return a value and nothing else.
Ok, i will fix this patch accordingly and resubmit it.
Thanks,
Ashish
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next prev parent reply other threads:[~2020-03-12 3:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 23:13 [PATCH v2] swiotlb: Adjust SWIOTBL bounce buffer size for SEV guests Ashish Kalra
2019-12-20 1:52 ` Konrad Rzeszutek Wilk
2020-01-21 20:09 ` Ashish Kalra
2020-01-21 20:54 ` Konrad Rzeszutek Wilk
2020-01-24 23:00 ` Ashish Kalra
2020-02-04 19:35 ` Ashish Kalra
2020-03-03 17:03 ` Konrad Rzeszutek Wilk
2020-03-12 0:43 ` Ashish Kalra [this message]
2020-03-30 22:25 ` Ashish Kalra
2020-04-27 18:53 ` Ashish Kalra
2020-06-23 13:38 ` Konrad Rzeszutek Wilk
2020-06-24 0:23 ` Ashish Kalra
2020-06-24 7:05 ` Ashish Kalra
2020-06-24 21:11 ` Konrad Rzeszutek Wilk
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