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ppc/xive2: Allow 1-byte write of Target field in TIMA

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When running PowerVM, the console is littered with XIVE traces regarding
invalid writes to TIMA address 0x100b6 due to a lack of support for writes
to the "TARGET" field which was added for XIVE GEN2.  To fix this, we add
special op support for 1-byte writes to this field.

Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Michael Kowal <kowal@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Glenn Miles 2024-09-13 11:16:52 -05:00 • committed by Nicholas Piggin
parent 76798e12df
commit cfe9a7f286
4 changed files with 18 additions and 0 deletions
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2
hw/intc/xive.c
View file

@ -546,6 +546,8 @@ static const XiveTmOp xive2_tm_operations[] = {
NULL },
{ XIVE_TM_HV_PAGE, TM_QW3_HV_PHYS + TM_WORD2, 1, NULL,
xive_tm_vt_poll },
{ XIVE_TM_HV_PAGE, TM_QW3_HV_PHYS + TM_T, 1, xive2_tm_set_hv_target,
NULL },
/* MMIOs above 2K : special operations with side effects */
{ XIVE_TM_OS_PAGE, TM_SPC_ACK_OS_REG, 2, NULL,

13
hw/intc/xive2.c
View file

@ -585,6 +585,19 @@ void xive2_tm_push_os_ctx(XivePresenter *xptr, XiveTCTX *tctx,
}
}
static void xive2_tctx_set_target(XiveTCTX *tctx, uint8_t ring, uint8_t target)
{
uint8_t *regs = &tctx->regs[ring];
regs[TM_T] = target;
}
void xive2_tm_set_hv_target(XivePresenter *xptr, XiveTCTX *tctx,
hwaddr offset, uint64_t value, unsigned size)
{
xive2_tctx_set_target(tctx, TM_QW3_HV_PHYS, value & 0xff);
}
/*
* XIVE Router (aka. Virtualization Controller or IVRE)
*/