motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/intc/arm_gicv3_its: Implement VMOVP

Browse source 
Implement the GICv4 VMOVP command, which updates an entry in the vPE
table to change its rdbase field. This command is unique in the ITS
command set because its effects must be propagated to all the other
ITSes connected to the same GIC as the ITS which executes the VMOVP
command.

The GICv4 spec allows two implementation choices for handling the
propagation to other ITSes:
 * If GITS_TYPER.VMOVP is 1, the guest only needs to issue the command
   on one ITS, and the implementation handles the propagation to
   all ITSes
 * If GITS_TYPER.VMOVP is 0, the guest must issue the command on
   every ITS, and arrange for the ITSes to synchronize the updates
   with each other by setting ITSList and Sequence Number fields
   in the command packets

We choose the GITS_TYPER.VMOVP = 1 approach, and synchronously
execute the update on every ITS.

For GICv4.1 this command has extra fields in the command packet and
additional behaviour.  We define the 4.1-only fields with the FIELD
macro, but only implement the GICv4.0 version of the command.

Note that we don't update the reported GITS_TYPER value here;
we'll do that later in a commit which updates all the reported
feature bit and ID register values for GICv4.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-17-peter.maydell@linaro.org
[PMM: Moved gicv3_foreach_its() to arm_gicv3_its_common.h,
 for consistency with gicv3_add_its()]
This commit is contained in:
Peter Maydell 2022-04-08 15:15:25 +01:00
parent 7c087bd330
commit 3851af4585
4 changed files with 94 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/hw/intc/arm_gicv3_its_common.h
View file

@ -98,6 +98,15 @@ static inline void gicv3_add_its(GICv3State *s, DeviceState *its)
g_ptr_array_add(s->itslist, its);
}
/*
* The ITS can use this for operations that must be performed on
* every ITS connected to the same GIC that it is
*/
static inline void gicv3_foreach_its(GICv3State *s, GFunc func, void *opaque)
{
g_ptr_array_foreach(s->itslist, func, opaque);
}
#define TYPE_ARM_GICV3_ITS_COMMON "arm-gicv3-its-common"
typedef struct GICv3ITSCommonClass GICv3ITSCommonClass;
DECLARE_OBJ_CHECKERS(GICv3ITSState, GICv3ITSCommonClass,