From a0675c25d6392c2197b796a60c4a2a0138c86355 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Sat, 7 Jun 2014 00:54:51 +0200 Subject: arm/arm64: KVM: add virtual GICv3 distributor emulation With everything separated and prepared, we implement a model of a GICv3 distributor and redistributors by using the existing framework to provide handler functions for each register group. Currently we limit the emulation to a model enforcing a single security state, with SRE==1 (forcing system register access) and ARE==1 (allowing more than 8 VCPUs). We share some of the functions provided for GICv2 emulation, but take the different ways of addressing (v)CPUs into account. Save and restore is currently not implemented. Similar to the split-off of the GICv2 specific code, the new emulation code goes into a new file (vgic-v3-emul.c). Signed-off-by: Andre Przywara Signed-off-by: Christoffer Dall --- include/linux/irqchip/arm-gic-v3.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'include/linux/irqchip') diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 1e8b0cf30792..3fb4d8588a26 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -33,6 +33,7 @@ #define GICD_SETSPI_SR 0x0050 #define GICD_CLRSPI_SR 0x0058 #define GICD_SEIR 0x0068 +#define GICD_IGROUPR 0x0080 #define GICD_ISENABLER 0x0100 #define GICD_ICENABLER 0x0180 #define GICD_ISPENDR 0x0200 @@ -41,14 +42,37 @@ #define GICD_ICACTIVER 0x0380 #define GICD_IPRIORITYR 0x0400 #define GICD_ICFGR 0x0C00 +#define GICD_IGRPMODR 0x0D00 +#define GICD_NSACR 0x0E00 #define GICD_IROUTER 0x6000 +#define GICD_IDREGS 0xFFD0 #define GICD_PIDR2 0xFFE8 +/* + * Those registers are actually from GICv2, but the spec demands that they + * are implemented as RES0 if ARE is 1 (which we do in KVM's emulated GICv3). + */ +#define GICD_ITARGETSR 0x0800 +#define GICD_SGIR 0x0F00 +#define GICD_CPENDSGIR 0x0F10 +#define GICD_SPENDSGIR 0x0F20 + #define GICD_CTLR_RWP (1U << 31) +#define GICD_CTLR_DS (1U << 6) #define GICD_CTLR_ARE_NS (1U << 4) #define GICD_CTLR_ENABLE_G1A (1U << 1) #define GICD_CTLR_ENABLE_G1 (1U << 0) +/* + * In systems with a single security state (what we emulate in KVM) + * the meaning of the interrupt group enable bits is slightly different + */ +#define GICD_CTLR_ENABLE_SS_G1 (1U << 1) +#define GICD_CTLR_ENABLE_SS_G0 (1U << 0) + +#define GICD_TYPER_LPIS (1U << 17) +#define GICD_TYPER_MBIS (1U << 16) + #define GICD_TYPER_ID_BITS(typer) ((((typer) >> 19) & 0x1f) + 1) #define GICD_TYPER_IRQS(typer) ((((typer) & 0x1f) + 1) * 32) #define GICD_TYPER_LPIS (1U << 17) @@ -60,6 +84,8 @@ #define GIC_PIDR2_ARCH_GICv3 0x30 #define GIC_PIDR2_ARCH_GICv4 0x40 +#define GIC_V3_DIST_SIZE 0x10000 + /* * Re-Distributor registers, offsets from RD_base */ @@ -78,6 +104,7 @@ #define GICR_SYNCR 0x00C0 #define GICR_MOVLPIR 0x0100 #define GICR_MOVALLR 0x0110 +#define GICR_IDREGS GICD_IDREGS #define GICR_PIDR2 GICD_PIDR2 #define GICR_CTLR_ENABLE_LPIS (1UL << 0) @@ -104,6 +131,7 @@ /* * Re-Distributor registers, offsets from SGI_base */ +#define GICR_IGROUPR0 GICD_IGROUPR #define GICR_ISENABLER0 GICD_ISENABLER #define GICR_ICENABLER0 GICD_ICENABLER #define GICR_ISPENDR0 GICD_ISPENDR @@ -112,11 +140,15 @@ #define GICR_ICACTIVER0 GICD_ICACTIVER #define GICR_IPRIORITYR0 GICD_IPRIORITYR #define GICR_ICFGR0 GICD_ICFGR +#define GICR_IGRPMODR0 GICD_IGRPMODR +#define GICR_NSACR GICD_NSACR #define GICR_TYPER_PLPIS (1U << 0) #define GICR_TYPER_VLPIS (1U << 1) #define GICR_TYPER_LAST (1U << 4) +#define GIC_V3_REDIST_SIZE 0x20000 + #define LPI_PROP_GROUP1 (1 << 1) #define LPI_PROP_ENABLED (1 << 0) -- cgit v1.2.3