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From: Leif Lindholm <leif@nuviainc.com>
To: qemu-arm@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	Shashi Mallela <shashi.mallela@linaro.org>,
	qemu-devel@nongnu.org
Subject: [RFC PATCH 0/4] hw/intc: enable GICv4 memory layout for GICv3 driver
Date: Sun, 24 Jan 2021 02:53:02 +0000	[thread overview]
Message-ID: <20210124025306.3949-1-leif@nuviainc.com> (raw)

GICv4 sets aside 256K per redistributor configuration block, whereas GICv3
only uses 128K. However, some codebases (like TF-A, EDK2) will happily use
the GICv3 functionality only.

This set aims at enabling these codebases to run, without actually enabling
full support for GICv4. 

This creates a ... problematic ... system, which will misbehave if you try
to use the virtual LPIs. But it does help with letting me use QEMU for
modelling a platform containing a GICv4, and share firmware images with
other prototyping platforms.

Leif Lindholm (4):
  hw/intc: don't bail out gicv3 model init for revision 4
  hw/intc: add helper function to determine gicv3 redistributor size
  hw/intc: set GICD_TYPER.DVIS for GICv4
  hw/intc: make gicv3_idreg() distinguish between gicv3/gicv4

 hw/intc/arm_gicv3_common.c         |  4 ++--
 hw/intc/arm_gicv3_dist.c           |  5 ++++-
 hw/intc/arm_gicv3_redist.c         | 15 ++++++++++-----
 hw/intc/gicv3_internal.h           | 12 ++++++++++--
 include/hw/intc/arm_gicv3_common.h |  3 +++
 5 files changed, 29 insertions(+), 10 deletions(-)

-- 
2.20.1



             reply	other threads:[~2021-01-24  2:55 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-24  2:53 Leif Lindholm [this message]
2021-01-24  2:53 ` [RFC PATCH 1/4] hw/intc: don't bail out gicv3 model init for revision 4 Leif Lindholm
2021-02-02 10:34   ` Peter Maydell
2021-01-24  2:53 ` [RFC PATCH 2/4] hw/intc: add helper function to determine gicv3 redistributor size Leif Lindholm
2021-02-02 10:27   ` Peter Maydell
2021-01-24  2:53 ` [RFC PATCH 3/4] hw/intc: set GICD_TYPER.DVIS for GICv4 Leif Lindholm
2021-02-02 10:34   ` Peter Maydell
2021-01-24  2:53 ` [RFC PATCH 4/4] hw/intc: make gicv3_idreg() distinguish between gicv3/gicv4 Leif Lindholm
2021-02-02 10:31   ` Peter Maydell
2021-02-03 11:36     ` Leif Lindholm
2021-01-24  3:00 ` [RFC PATCH 0/4] hw/intc: enable GICv4 memory layout for GICv3 driver no-reply
2021-02-02 10:39 ` Peter Maydell
2021-02-03 12:26   ` Leif Lindholm

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