From patchwork Wed Nov 23 16:54:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Jones X-Patchwork-Id: 698430 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3tP84k5nXgz9t0G for ; Thu, 24 Nov 2016 04:11:18 +1100 (AEDT) Received: from localhost ([::1]:35072 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c9b4m-0006in-CA for incoming@patchwork.ozlabs.org; Wed, 23 Nov 2016 12:11:16 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33678) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c9aot-0001tn-Jq for qemu-devel@nongnu.org; Wed, 23 Nov 2016 11:54:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c9aoo-0000t3-9W for qemu-devel@nongnu.org; Wed, 23 Nov 2016 11:54:51 -0500 Received: from mx1.redhat.com ([209.132.183.28]:45624) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c9aog-0000hd-AY; Wed, 23 Nov 2016 11:54:38 -0500 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 58AAC3B3E7; Wed, 23 Nov 2016 16:54:37 +0000 (UTC) Received: from kamzik.brq.redhat.com (kamzik.brq.redhat.com [10.34.1.143]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uANGs8Re001736; Wed, 23 Nov 2016 11:54:34 -0500 From: Andrew Jones To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, qemu-devel@nongnu.org, qemu-arm@nongnu.org Date: Wed, 23 Nov 2016 17:54:05 +0100 Message-Id: <20161123165406.32661-11-drjones@redhat.com> In-Reply-To: <20161123165406.32661-1-drjones@redhat.com> References: <20161123165406.32661-1-drjones@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Wed, 23 Nov 2016 16:54:37 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [kvm-unit-tests PATCH v7 10/11] arm/arm64: gicv3: add an IPI test X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, marc.zyngier@arm.com, andre.przywara@arm.com, eric.auger@redhat.com, pbonzini@redhat.com, alex.bennee@linaro.org, christoffer.dall@linaro.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Andrew Jones --- v7: - add common ipi_send_single/mask (replacing ipi_send). Note, the arg order irq,cpu got swapped. [Eric] - comment rewording [Eric] - make enable_defaults a common op [Eric] - gic_enable_defaults() will now invoke gic_init if necessary [drew] - split lib/arm/gic.c into gic-v2/3.c [Eric] v6: move most gicv2/gicv3 wrappers to common code [Alex] v5: - fix copy+paste error in gicv3_write_eoir [drew] - use modern register names [Andre] v4: - heavily comment gicv3_ipi_send_tlist() [Eric] - changes needed for gicv2 iar/irqstat fix to other patch v2: - use IRM for gicv3 broadcast --- arm/gic.c | 83 ++++++++++++++++++++++++++++++++-------- arm/unittests.cfg | 6 +++ lib/arm/asm/arch_gicv3.h | 23 ++++++++++++ lib/arm/asm/gic-v2.h | 2 + lib/arm/asm/gic-v3.h | 12 +++++- lib/arm/asm/gic.h | 63 +++++++++++++++++++++++++++++++ lib/arm/gic-v2.c | 40 ++++++++++++++++++++ lib/arm/gic-v3.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++ lib/arm/gic.c | 9 ++++- lib/arm64/asm/arch_gicv3.h | 22 +++++++++++ 10 files changed, 336 insertions(+), 18 deletions(-) diff --git a/arm/gic.c b/arm/gic.c index b42c2b1ca1e1..23c1860a49d9 100644 --- a/arm/gic.c +++ b/arm/gic.c @@ -3,6 +3,8 @@ * * GICv2 * + test sending/receiving IPIs + * GICv3 + * + test sending/receiving IPIs * * Copyright (C) 2016, Red Hat Inc, Andrew Jones * @@ -16,7 +18,14 @@ #include #include -static int gic_version; +struct gic { + struct { + void (*send_self)(void); + void (*send_broadcast)(void); + } ipi; +}; + +static struct gic *gic; static int acked[NR_CPUS], spurious[NR_CPUS]; static cpumask_t ready; @@ -83,11 +92,11 @@ static void check_spurious(void) static void ipi_handler(struct pt_regs *regs __unused) { - u32 irqstat = readl(gicv2_cpu_base() + GICC_IAR); - u32 irqnr = irqstat & GICC_IAR_INT_ID_MASK; + u32 irqstat = gic_read_iar(); + u32 irqnr = gic_iar_irqnr(irqstat); if (irqnr != GICC_INT_SPURIOUS) { - writel(irqstat, gicv2_cpu_base() + GICC_EOIR); + gic_write_eoir(irqstat); smp_rmb(); /* pairs with wmb in ipi_test functions */ ++acked[smp_processor_id()]; smp_wmb(); /* pairs with rmb in check_acked */ @@ -97,6 +106,27 @@ static void ipi_handler(struct pt_regs *regs __unused) } } +static void gicv2_ipi_send_self(void) +{ + writel(2 << 24, gicv2_dist_base() + GICD_SGIR); +} + +static void gicv2_ipi_send_broadcast(void) +{ + writel(1 << 24, gicv2_dist_base() + GICD_SGIR); +} + +static void gicv3_ipi_send_self(void) +{ + gic_ipi_send_single(0, smp_processor_id()); +} + +static void gicv3_ipi_send_broadcast(void) +{ + gicv3_write_sgi1r(1ULL << 40); + isb(); +} + static void ipi_test_self(void) { cpumask_t mask; @@ -106,7 +136,7 @@ static void ipi_test_self(void) smp_wmb(); cpumask_clear(&mask); cpumask_set_cpu(0, &mask); - writel(2 << 24, gicv2_dist_base() + GICD_SGIR); + gic->ipi.send_self(); check_acked(&mask); report_prefix_pop(); } @@ -114,14 +144,15 @@ static void ipi_test_self(void) static void ipi_test_smp(void) { cpumask_t mask; - unsigned long tlist; + int i; report_prefix_push("target-list"); memset(acked, 0, sizeof(acked)); smp_wmb(); - tlist = cpumask_bits(&cpu_present_mask)[0] & 0xaa; - cpumask_bits(&mask)[0] = tlist; - writel((u8)tlist << 16, gicv2_dist_base() + GICD_SGIR); + cpumask_copy(&mask, &cpu_present_mask); + for (i = 0; i < nr_cpus; i += 2) + cpumask_clear_cpu(i, &mask); + gic_ipi_send_mask(0, &mask); check_acked(&mask); report_prefix_pop(); @@ -130,14 +161,14 @@ static void ipi_test_smp(void) smp_wmb(); cpumask_copy(&mask, &cpu_present_mask); cpumask_clear_cpu(0, &mask); - writel(1 << 24, gicv2_dist_base() + GICD_SGIR); + gic->ipi.send_broadcast(); check_acked(&mask); report_prefix_pop(); } static void ipi_enable(void) { - gicv2_enable_defaults(); + gic_enable_defaults(); #ifdef __arm__ install_exception_handler(EXCPTN_IRQ, ipi_handler); #else @@ -154,18 +185,40 @@ static void ipi_recv(void) wfi(); } +static struct gic gicv2 = { + .ipi = { + .send_self = gicv2_ipi_send_self, + .send_broadcast = gicv2_ipi_send_broadcast, + }, +}; + +static struct gic gicv3 = { + .ipi = { + .send_self = gicv3_ipi_send_self, + .send_broadcast = gicv3_ipi_send_broadcast, + }, +}; + int main(int argc, char **argv) { char pfx[8]; int cpu; - gic_version = gic_init(); - if (!gic_version) - report_abort("No gic present!"); + if (!gic_init()) + report_abort("No supported gic present!"); - snprintf(pfx, sizeof(pfx), "gicv%d", gic_version); + snprintf(pfx, sizeof(pfx), "gicv%d", gic_version()); report_prefix_push(pfx); + switch (gic_version()) { + case 2: + gic = &gicv2; + break; + case 3: + gic = &gicv3; + break; + } + if (argc < 2) { report_prefix_push("ipi"); diff --git a/arm/unittests.cfg b/arm/unittests.cfg index e631c35e2bbb..c7392c747f98 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -66,3 +66,9 @@ file = gic.flat smp = $((($MAX_SMP < 8)?$MAX_SMP:8)) extra_params = -machine gic-version=2 -append 'ipi' groups = gic + +[gicv3-ipi] +file = gic.flat +smp = $MAX_SMP +extra_params = -machine gic-version=3 -append 'ipi' +groups = gic diff --git a/lib/arm/asm/arch_gicv3.h b/lib/arm/asm/arch_gicv3.h index 276577452a14..b47cd2e0090b 100644 --- a/lib/arm/asm/arch_gicv3.h +++ b/lib/arm/asm/arch_gicv3.h @@ -16,10 +16,28 @@ #define __stringify xstr #define __ACCESS_CP15(CRn, Op1, CRm, Op2) p15, Op1, %0, CRn, CRm, Op2 +#define __ACCESS_CP15_64(Op1, CRm) p15, Op1, %Q0, %R0, CRm +#define ICC_EOIR1 __ACCESS_CP15(c12, 0, c12, 1) +#define ICC_IAR1 __ACCESS_CP15(c12, 0, c12, 0) +#define ICC_SGI1R __ACCESS_CP15_64(0, c12) #define ICC_PMR __ACCESS_CP15(c4, 0, c6, 0) #define ICC_IGRPEN1 __ACCESS_CP15(c12, 0, c12, 7) +static inline void gicv3_write_eoir(u32 irq) +{ + asm volatile("mcr " __stringify(ICC_EOIR1) : : "r" (irq)); + isb(); +} + +static inline u32 gicv3_read_iar(void) +{ + u32 irqstat; + asm volatile("mrc " __stringify(ICC_IAR1) : "=r" (irqstat)); + dsb(sy); + return irqstat; +} + static inline void gicv3_write_pmr(u32 val) { asm volatile("mcr " __stringify(ICC_PMR) : : "r" (val)); @@ -31,6 +49,11 @@ static inline void gicv3_write_grpen1(u32 val) isb(); } +static inline void gicv3_write_sgi1r(u64 val) +{ + asm volatile("mcrr " __stringify(ICC_SGI1R) : : "r" (val)); +} + /* * We may access GICR_TYPER and GITS_TYPER by reading both the TYPER * offset and the following offset (+ 4) and then combining them to diff --git a/lib/arm/asm/gic-v2.h b/lib/arm/asm/gic-v2.h index 8b3f7ed6790c..9debd77b1d94 100644 --- a/lib/arm/asm/gic-v2.h +++ b/lib/arm/asm/gic-v2.h @@ -32,5 +32,7 @@ extern struct gicv2_data gicv2_data; extern int gicv2_init(void); extern void gicv2_enable_defaults(void); +extern struct gic_common_ops gicv2_common_ops; + #endif /* !__ASSEMBLY__ */ #endif /* _ASMARM_GIC_V2_H_ */ diff --git a/lib/arm/asm/gic-v3.h b/lib/arm/asm/gic-v3.h index 73ade4681d21..22deb4b521d6 100644 --- a/lib/arm/asm/gic-v3.h +++ b/lib/arm/asm/gic-v3.h @@ -33,12 +33,19 @@ #define GICR_ISENABLER0 GICD_ISENABLER #define GICR_IPRIORITYR0 GICD_IPRIORITYR +#define ICC_SGI1R_AFFINITY_1_SHIFT 16 +#define ICC_SGI1R_AFFINITY_2_SHIFT 32 +#define ICC_SGI1R_AFFINITY_3_SHIFT 48 +#define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \ + (MPIDR_AFFINITY_LEVEL(cluster_id, level) << ICC_SGI1R_AFFINITY_## level ## _SHIFT) + #include #ifndef __ASSEMBLY__ #include -#include #include +#include +#include #include struct gicv3_data { @@ -55,6 +62,9 @@ extern struct gicv3_data gicv3_data; extern int gicv3_init(void); extern void gicv3_enable_defaults(void); extern void gicv3_set_redist_base(size_t stride); +extern void gicv3_ipi_send_mask(int irq, const cpumask_t *dest); + +extern struct gic_common_ops gicv3_common_ops; static inline void gicv3_do_wait_for_rwp(void *base) { diff --git a/lib/arm/asm/gic.h b/lib/arm/asm/gic.h index 21511997f2a9..ea5fde91a97f 100644 --- a/lib/arm/asm/gic.h +++ b/lib/arm/asm/gic.h @@ -32,6 +32,7 @@ #include #ifndef __ASSEMBLY__ +#include /* * gic_init will try to find all known gics, and then @@ -42,5 +43,67 @@ */ extern int gic_init(void); +/* + * gic_common_ops collects useful functions for unit tests which + * aren't concerned with the gic version they're using. + */ +struct gic_common_ops { + int gic_version; + void (*enable_defaults)(void); + u32 (*read_iar)(void); + u32 (*iar_irqnr)(u32 iar); + void (*write_eoir)(u32 irqstat); + void (*ipi_send_single)(int irq, int cpu); + void (*ipi_send_mask)(int irq, const cpumask_t *dest); +}; + +extern struct gic_common_ops *gic_common_ops; + +static inline int gic_version(void) +{ + assert(gic_common_ops); + return gic_common_ops->gic_version; +} + +static inline void gic_enable_defaults(void) +{ + if (!gic_common_ops) { + int ret = gic_init(); + assert(ret != 0); + } else + assert(gic_common_ops->enable_defaults); + gic_common_ops->enable_defaults(); +} + +static inline u32 gic_read_iar(void) +{ + assert(gic_common_ops && gic_common_ops->read_iar); + return gic_common_ops->read_iar(); +} + +static inline u32 gic_iar_irqnr(u32 iar) +{ + assert(gic_common_ops && gic_common_ops->iar_irqnr); + return gic_common_ops->iar_irqnr(iar); +} + +static inline void gic_write_eoir(u32 irqstat) +{ + assert(gic_common_ops && gic_common_ops->write_eoir); + gic_common_ops->write_eoir(irqstat); +} + +static inline void gic_ipi_send_single(int irq, int cpu) +{ + assert(gic_common_ops && gic_common_ops->ipi_send_single); + gic_common_ops->ipi_send_single(irq, cpu); +} + +static inline void gic_ipi_send_mask(int irq, const cpumask_t *dest) +{ + assert(gic_common_ops && gic_common_ops->ipi_send_mask); + gic_common_ops->ipi_send_mask(irq, dest); +} + #endif /* !__ASSEMBLY__ */ #endif /* _ASMARM_GIC_H_ */ diff --git a/lib/arm/gic-v2.c b/lib/arm/gic-v2.c index e80eb8f29488..f78ac523547d 100644 --- a/lib/arm/gic-v2.c +++ b/lib/arm/gic-v2.c @@ -25,3 +25,43 @@ void gicv2_enable_defaults(void) writel(GICC_INT_PRI_THRESHOLD, cpu_base + GICC_PMR); writel(GICC_ENABLE, cpu_base + GICC_CTLR); } + +static u32 gicv2_read_iar(void) +{ + return readl(gicv2_cpu_base() + GICC_IAR); +} + +static u32 gicv2_iar_irqnr(u32 iar) +{ + return iar & GICC_IAR_INT_ID_MASK; +} + +static void gicv2_write_eoir(u32 irqstat) +{ + writel(irqstat, gicv2_cpu_base() + GICC_EOIR); +} + +static void gicv2_ipi_send_single(int irq, int cpu) +{ + assert(cpu < 8); + assert(irq < 16); + writel(1 << (cpu + 16) | irq, gicv2_dist_base() + GICD_SGIR); +} + +static void gicv2_ipi_send_mask(int irq, const cpumask_t *dest) +{ + u8 tlist = (u8)cpumask_bits(dest)[0]; + + assert(irq < 16); + writel(tlist << 16 | irq, gicv2_dist_base() + GICD_SGIR); +} + +struct gic_common_ops gicv2_common_ops = { + .gic_version = 2, + .enable_defaults = gicv2_enable_defaults, + .read_iar = gicv2_read_iar, + .iar_irqnr = gicv2_iar_irqnr, + .write_eoir = gicv2_write_eoir, + .ipi_send_single = gicv2_ipi_send_single, + .ipi_send_mask = gicv2_ipi_send_mask, +}; diff --git a/lib/arm/gic-v3.c b/lib/arm/gic-v3.c index c46d16e11782..6246221cba8f 100644 --- a/lib/arm/gic-v3.c +++ b/lib/arm/gic-v3.c @@ -59,3 +59,97 @@ void gicv3_enable_defaults(void) gicv3_write_pmr(GICC_INT_PRI_THRESHOLD); gicv3_write_grpen1(1); } + +static u32 gicv3_iar_irqnr(u32 iar) +{ + return iar; +} + +void gicv3_ipi_send_mask(int irq, const cpumask_t *dest) +{ + u16 tlist; + int cpu; + + assert(irq < 16); + + /* + * For each cpu in the mask collect its peers, which are also in + * the mask, in order to form target lists. + */ + for_each_cpu(cpu, dest) { + u64 mpidr = cpus[cpu], sgi1r; + u64 cluster_id; + + /* + * GICv3 can send IPIs to up 16 peer cpus with a single + * write to ICC_SGI1R_EL1 (using the target list). Peers + * are cpus that have nearly identical MPIDRs, the only + * difference being Aff0. The matching upper affinity + * levels form the cluster ID. + */ + cluster_id = mpidr & ~0xffUL; + tlist = 0; + + /* + * Sort of open code for_each_cpu in order to have a + * nested for_each_cpu loop. + */ + while (cpu < nr_cpus) { + if ((mpidr & 0xff) >= 16) { + printf("cpu%d MPIDR:aff0 is %d (>= 16)!\n", + cpu, (int)(mpidr & 0xff)); + break; + } + + tlist |= 1 << (mpidr & 0xf); + + cpu = cpumask_next(cpu, dest); + if (cpu >= nr_cpus) + break; + + mpidr = cpus[cpu]; + + if (cluster_id != (mpidr & ~0xffUL)) { + /* + * The next cpu isn't in our cluster. Roll + * back the cpu index allowing the outer + * for_each_cpu to find it again with + * cpumask_next + */ + --cpu; + break; + } + } + + /* Send the IPIs for the target list of this cluster */ + sgi1r = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3) | + MPIDR_TO_SGI_AFFINITY(cluster_id, 2) | + irq << 24 | + MPIDR_TO_SGI_AFFINITY(cluster_id, 1) | + tlist); + + gicv3_write_sgi1r(sgi1r); + } + + /* Force the above writes to ICC_SGI1R_EL1 to be executed */ + isb(); +} + +static void gicv3_ipi_send_single(int irq, int cpu) +{ + cpumask_t dest; + + cpumask_clear(&dest); + cpumask_set_cpu(cpu, &dest); + gicv3_ipi_send_mask(irq, &dest); +} + +struct gic_common_ops gicv3_common_ops = { + .gic_version = 3, + .enable_defaults = gicv3_enable_defaults, + .read_iar = gicv3_read_iar, + .iar_irqnr = gicv3_iar_irqnr, + .write_eoir = gicv3_write_eoir, + .ipi_send_single = gicv3_ipi_send_single, + .ipi_send_mask = gicv3_ipi_send_mask, +}; diff --git a/lib/arm/gic.c b/lib/arm/gic.c index 4d3ddd9722b1..957a1467fbdd 100644 --- a/lib/arm/gic.c +++ b/lib/arm/gic.c @@ -7,6 +7,8 @@ #include #include +struct gic_common_ops *gic_common_ops; + struct gicv2_data gicv2_data; struct gicv3_data gicv3_data; @@ -58,9 +60,12 @@ int gicv3_init(void) int gic_init(void) { - if (gicv2_init()) + if (gicv2_init()) { + gic_common_ops = &gicv2_common_ops; return 2; - else if (gicv3_init()) + } else if (gicv3_init()) { + gic_common_ops = &gicv3_common_ops; return 3; + } return 0; } diff --git a/lib/arm64/asm/arch_gicv3.h b/lib/arm64/asm/arch_gicv3.h index 6d353567f56a..874775828016 100644 --- a/lib/arm64/asm/arch_gicv3.h +++ b/lib/arm64/asm/arch_gicv3.h @@ -10,6 +10,9 @@ #include +#define ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1) +#define ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0) +#define ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5) #define ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0) #define ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7) @@ -27,6 +30,20 @@ * sets the GP register's most significant bits to 0 with an explicit cast. */ +static inline void gicv3_write_eoir(u32 irq) +{ + asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" ((u64)irq)); + isb(); +} + +static inline u32 gicv3_read_iar(void) +{ + u64 irqstat; + asm volatile("mrs_s %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat)); + dsb(sy); + return (u64)irqstat; +} + static inline void gicv3_write_pmr(u32 val) { asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" ((u64)val)); @@ -38,6 +55,11 @@ static inline void gicv3_write_grpen1(u32 val) isb(); } +static inline void gicv3_write_sgi1r(u64 val) +{ + asm volatile("msr_s " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val)); +} + #define gicv3_read_typer(c) readq(c) #endif /* __ASSEMBLY__ */