From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 22/59] irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessors Date: Mon, 31 Jul 2017 18:26:00 +0100 Message-ID: <20170731172637.29355-23-marc.zyngier@arm.com> References: <20170731172637.29355-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jason Cooper , Thomas Gleixner To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: In-Reply-To: <20170731172637.29355-1-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org V{PEND,PROP}BASER being 64bit registers, they need some ad-hoc accessors on 32bit, specially given that VPENDBASER contains a Valid bit, making the access a bit convoluted. Reviewed-by: Thomas Gleixner Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- arch/arm/include/asm/arch_gicv3.h | 28 ++++++++++++++++++++++++++++ arch/arm64/include/asm/arch_gicv3.h | 5 +++++ include/linux/irqchip/arm-gic-v3.h | 5 +++++ 3 files changed, 38 insertions(+) diff --git a/arch/arm/include/asm/arch_gicv3.h b/arch/arm/include/asm/arch_gicv3.h index 27475904e096..8d45e88feac9 100644 --- a/arch/arm/include/asm/arch_gicv3.h +++ b/arch/arm/include/asm/arch_gicv3.h @@ -291,5 +291,33 @@ static inline u64 __gic_readq_nonatomic(const volatile void __iomem *addr) */ #define gits_write_cwriter(v, c) __gic_writeq_nonatomic(v, c) +/* + * GITS_VPROPBASER - hi and lo bits may be accessed independently. + */ +#define gits_write_vpropbaser(v, c) __gic_writeq_nonatomic(v, c) + +/* + * GITS_VPENDBASER - the Valid bit must be cleared before changing + * anything else. + */ +static inline void gits_write_vpendbaser(u64 val, void * __iomem addr) +{ + u32 tmp; + + tmp = readl_relaxed(addr + 4); + if (tmp & (GICR_VPENDBASER_Valid >> 32)) { + tmp &= ~(GICR_VPENDBASER_Valid >> 32); + writel_relaxed(tmp, addr + 4); + } + + /* + * Use the fact that __gic_writeq_nonatomic writes the second + * half of the 64bit quantity after the first. + */ + __gic_writeq_nonatomic(val, addr); +} + +#define gits_read_vpendbaser(c) __gic_readq_nonatomic(c) + #endif /* !__ASSEMBLY__ */ #endif /* !__ASM_ARCH_GICV3_H */ diff --git a/arch/arm64/include/asm/arch_gicv3.h b/arch/arm64/include/asm/arch_gicv3.h index 8cef47fa2218..0d2a53457c30 100644 --- a/arch/arm64/include/asm/arch_gicv3.h +++ b/arch/arm64/include/asm/arch_gicv3.h @@ -133,5 +133,10 @@ static inline void gic_write_bpr1(u32 val) #define gicr_write_pendbaser(v, c) writeq_relaxed(v, c) #define gicr_read_pendbaser(c) readq_relaxed(c) +#define gits_write_vpropbaser(v, c) writeq_relaxed(v, c) + +#define gits_write_vpendbaser(v, c) writeq_relaxed(v, c) +#define gits_read_vpendbaser(c) readq_relaxed(c) + #endif /* __ASSEMBLY__ */ #endif /* __ASM_ARCH_GICV3_H */ diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 7c6fd8f3e36c..17ba0d732f12 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -212,6 +212,11 @@ #define LPI_PROP_GROUP1 (1 << 1) #define LPI_PROP_ENABLED (1 << 0) +#define GICR_VPENDBASER_Dirty (1ULL << 60) +#define GICR_VPENDBASER_PendingLast (1ULL << 61) +#define GICR_VPENDBASER_IDAI (1ULL << 62) +#define GICR_VPENDBASER_Valid (1ULL << 63) + /* * ITS registers, offsets from ITS_base */ -- 2.11.0