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pnv/xive2: Don't overwrite PC registers when writing TCTXT registers

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When writing a register from the TCTXT memory region (4th page within
the IC BAR), we were overwriting the Presentation Controller (PC)
register at the same offset. It looks like a silly cut and paste
error.

We were somehow lucky: the TCTXT registers being touched are
TCTXT_ENx/_SET/_RESET to enable physical threads and the PC registers
at the same offset are either not used by our model or the update was
harmless.

Found through code inspection.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220523151859.72283-1-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Frederic Barrat 2022-05-23 17:18:59 +02:00 committed by Daniel Henrique Barboza
parent dd657a35b4
commit d5aa9e7904
1 changed files with 0 additions and 3 deletions
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3
hw/intc/pnv_xive2.c
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@ -1295,7 +1295,6 @@ static void pnv_xive2_ic_tctxt_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size) uint64_t val, unsigned size)
{ {
PnvXive2 *xive = PNV_XIVE2(opaque); PnvXive2 *xive = PNV_XIVE2(opaque);
uint32_t reg = offset >> 3;
switch (offset) { switch (offset) {
/* /*
@ -1322,8 +1321,6 @@ static void pnv_xive2_ic_tctxt_write(void *opaque, hwaddr offset,
xive2_error(xive, "TCTXT: invalid write @%"HWADDR_PRIx, offset); xive2_error(xive, "TCTXT: invalid write @%"HWADDR_PRIx, offset);
return; return;
} }
xive->pc_regs[reg] = val;
} }
static const MemoryRegionOps pnv_xive2_ic_tctxt_ops = { static const MemoryRegionOps pnv_xive2_ic_tctxt_ops = {