From: Kunkun Jiang jiangkunkun@huawei.com
virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8K89F CVE: NA
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In HiSilicon implementation, we reuse the *VSGI* command to set the configuration of a specified vPPI and optionally clear its pending state. A bit odd, but keeping the smallest change in HW level is safe.
The vINTID field has been therefore extended to [36:32], carefully encode it to respect the new requirement. Note that _only_ vtimer interrupt is supported at the moment!
Signed-off-by: wanghaibin wanghaibin.wang@huawei.com Signed-off-by: Zenghui Yu yuzenghui@huawei.com Signed-off-by: Kunkun Jiang jiangkunkun@huawei.com Signed-off-by: Dongxu Sun sundongxu3@huawei.com --- drivers/irqchip/irq-gic-v3-its.c | 38 ++++++++++++++++++++++++++++-- drivers/irqchip/irq-gic-v3.c | 30 ----------------------- include/linux/irqchip/arm-gic-v3.h | 30 +++++++++++++++++++++++ 3 files changed, 66 insertions(+), 32 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 2d0605a38be2..22054d1c7aac 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -129,6 +129,21 @@ struct its_node {
#define is_vtimer_irqbypass(its) (!!((its)->version & GITS_VERSION_VTIMER))
+/* Fetch it from gtdt->virtual_timer_interrupt. */ +#define is_vtimer_irq(irq) ((irq) == 27) + +static inline bool is_its_vsgi_cmd_valid(struct its_node *its, u8 hwirq) +{ + if (__get_intid_range(hwirq) == SGI_RANGE) + return true; + + /* For PPI range, only vtimer interrupt is supported atm. */ + if (is_vtimer_irq(hwirq) && is_vtimer_irqbypass(its)) + return true; + + return false; +} + #define ITS_ITT_ALIGN SZ_256
/* The maximum number of VPEID bits supported by VLPI commands */ @@ -574,6 +589,16 @@ static void its_encode_sgi_intid(struct its_cmd_block *cmd, u8 sgi) its_mask_encode(&cmd->raw_cmd[0], sgi, 35, 32); }
+static void its_encode_sgi_intid_extension(struct its_cmd_block *cmd, u8 sgi) +{ + /* + * We reuse the VSGI command in this implementation to configure + * the vPPI or clear its pending state. The vINTID field has been + * therefore extended to [36:32]. + */ + its_mask_encode(&cmd->raw_cmd[0], sgi, 36, 32); +} + static void its_encode_sgi_priority(struct its_cmd_block *cmd, u8 prio) { its_mask_encode(&cmd->raw_cmd[0], prio >> 4, 23, 20); @@ -973,7 +998,10 @@ static struct its_vpe *its_build_vsgi_cmd(struct its_node *its,
its_encode_cmd(cmd, GITS_CMD_VSGI); its_encode_vpeid(cmd, desc->its_vsgi_cmd.vpe->vpe_id); - its_encode_sgi_intid(cmd, desc->its_vsgi_cmd.sgi); + if (!is_vtimer_irqbypass(its)) + its_encode_sgi_intid(cmd, desc->its_vsgi_cmd.sgi); + else + its_encode_sgi_intid_extension(cmd, desc->its_vsgi_cmd.sgi); its_encode_sgi_priority(cmd, desc->its_vsgi_cmd.priority); its_encode_sgi_group(cmd, desc->its_vsgi_cmd.group); its_encode_sgi_clear(cmd, desc->its_vsgi_cmd.clear); @@ -4439,8 +4467,14 @@ static struct irq_chip its_vpe_4_1_irq_chip = { static void its_configure_sgi(struct irq_data *d, bool clear) { struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its = find_4_1_its(); struct its_cmd_desc desc;
+ if (!its || !is_its_vsgi_cmd_valid(its, d->hwirq)) { + pr_err("ITS: its_configure_sgi failed\n"); + return; + } + desc.its_vsgi_cmd.vpe = vpe; desc.its_vsgi_cmd.sgi = d->hwirq; desc.its_vsgi_cmd.priority = vpe->sgi_config[d->hwirq].priority; @@ -4453,7 +4487,7 @@ static void its_configure_sgi(struct irq_data *d, bool clear) * destination VPE is mapped there. Since we map them eagerly at * activation time, we're pretty sure the first GICv4.1 ITS will do. */ - its_send_single_vcommand(find_4_1_its(), its_build_vsgi_cmd, &desc); + its_send_single_vcommand(its, its_build_vsgi_cmd, &desc); }
static void its_sgi_mask_irq(struct irq_data *d) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index e1faf99d0c1a..81ed7546f44e 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -135,36 +135,6 @@ static DEFINE_PER_CPU(bool, has_rss); /* Our default, arbitrary priority value. Linux only uses one anyway. */ #define DEFAULT_PMR_VALUE 0xf0
-enum gic_intid_range { - SGI_RANGE, - PPI_RANGE, - SPI_RANGE, - EPPI_RANGE, - ESPI_RANGE, - LPI_RANGE, - __INVALID_RANGE__ -}; - -static enum gic_intid_range __get_intid_range(irq_hw_number_t hwirq) -{ - switch (hwirq) { - case 0 ... 15: - return SGI_RANGE; - case 16 ... 31: - return PPI_RANGE; - case 32 ... 1019: - return SPI_RANGE; - case EPPI_BASE_INTID ... (EPPI_BASE_INTID + 63): - return EPPI_RANGE; - case ESPI_BASE_INTID ... (ESPI_BASE_INTID + 1023): - return ESPI_RANGE; - case 8192 ... GENMASK(23, 0): - return LPI_RANGE; - default: - return __INVALID_RANGE__; - } -} - phys_addr_t get_gicr_paddr(int cpu) { return (per_cpu_ptr(gic_data.rdists.rdist, cpu))->phys_base; diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 8900fe6563f9..871667fe6651 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -726,6 +726,36 @@ static inline bool gic_enable_sre(void) return !!(val & ICC_SRE_EL1_SRE); }
+enum gic_intid_range { + SGI_RANGE, + PPI_RANGE, + SPI_RANGE, + EPPI_RANGE, + ESPI_RANGE, + LPI_RANGE, + __INVALID_RANGE__ +}; + +static inline enum gic_intid_range __get_intid_range(irq_hw_number_t hwirq) +{ + switch (hwirq) { + case 0 ... 15: + return SGI_RANGE; + case 16 ... 31: + return PPI_RANGE; + case 32 ... 1019: + return SPI_RANGE; + case EPPI_BASE_INTID ... (EPPI_BASE_INTID + 63): + return EPPI_RANGE; + case ESPI_BASE_INTID ... (ESPI_BASE_INTID + 1023): + return ESPI_RANGE; + case 8192 ... GENMASK(23, 0): + return LPI_RANGE; + default: + return __INVALID_RANGE__; + } +} + #endif
#endif