diff options
Diffstat (limited to 'drivers/irqchip/irq-gic-v3.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index d6218012097b..ffcb018395ed 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -858,8 +858,21 @@ static int __gic_update_rdist_properties(struct redist_region *region, void __iomem *ptr) { u64 typer = gic_read_typer(ptr + GICR_TYPER); + gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS); - gic_data.rdists.has_direct_lpi &= !!(typer & GICR_TYPER_DirectLPIS); + + /* RVPEID implies some form of DirectLPI, no matter what the doc says... :-/ */ + gic_data.rdists.has_rvpeid &= !!(typer & GICR_TYPER_RVPEID); + gic_data.rdists.has_direct_lpi &= (!!(typer & GICR_TYPER_DirectLPIS) | + gic_data.rdists.has_rvpeid); + + /* Detect non-sensical configurations */ + if (WARN_ON_ONCE(gic_data.rdists.has_rvpeid && !gic_data.rdists.has_vlpis)) { + gic_data.rdists.has_direct_lpi = false; + gic_data.rdists.has_vlpis = false; + gic_data.rdists.has_rvpeid = false; + } + gic_data.ppi_nr = min(GICR_TYPER_NR_PPIS(typer), gic_data.ppi_nr); return 1; @@ -872,9 +885,10 @@ static void gic_update_rdist_properties(void) if (WARN_ON(gic_data.ppi_nr == UINT_MAX)) gic_data.ppi_nr = 0; pr_info("%d PPIs implemented\n", gic_data.ppi_nr); - pr_info("%sVLPI support, %sdirect LPI support\n", + pr_info("%sVLPI support, %sdirect LPI support, %sRVPEID support\n", !gic_data.rdists.has_vlpis ? "no " : "", - !gic_data.rdists.has_direct_lpi ? "no " : ""); + !gic_data.rdists.has_direct_lpi ? "no " : "", + !gic_data.rdists.has_rvpeid ? "no " : ""); } /* Check whether it's single security state view */ @@ -1566,6 +1580,7 @@ static int __init gic_init_bases(void __iomem *dist_base, &gic_data); irq_domain_update_bus_token(gic_data.domain, DOMAIN_BUS_WIRED); gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist)); + gic_data.rdists.has_rvpeid = true; gic_data.rdists.has_vlpis = true; gic_data.rdists.has_direct_lpi = true; |