kvm.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Raghavendra Rao Ananta <rananta@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Peter Shier <pshier@google.com>,
	Ricardo Koller <ricarkol@google.com>,
	Oliver Upton <oupton@google.com>,
	Reiji Watanabe <reijiw@google.com>,
	Jing Zhang <jingzhangos@google.com>,
	Raghavendra Rao Anata <rananta@google.com>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org
Subject: [PATCH v3 05/12] KVM: arm64: selftests: Add basic support to generate delays
Date: Wed,  1 Sep 2021 21:14:05 +0000	[thread overview]
Message-ID: <20210901211412.4171835-6-rananta@google.com> (raw)
In-Reply-To: <20210901211412.4171835-1-rananta@google.com>

Add udelay() support to generate a delay in the guest.

The routines are derived and simplified from kernel's
arch/arm64/lib/delay.c.

Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
---
 .../selftests/kvm/include/aarch64/delay.h     | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/delay.h

diff --git a/tools/testing/selftests/kvm/include/aarch64/delay.h b/tools/testing/selftests/kvm/include/aarch64/delay.h
new file mode 100644
index 000000000000..329e4f5079ea
--- /dev/null
+++ b/tools/testing/selftests/kvm/include/aarch64/delay.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ARM simple delay routines
+ */
+
+#ifndef SELFTEST_KVM_ARM_DELAY_H
+#define SELFTEST_KVM_ARM_DELAY_H
+
+#include "arch_timer.h"
+
+static inline void __delay(uint64_t cycles)
+{
+	enum arch_timer timer = VIRTUAL;
+	uint64_t start = timer_get_cntct(timer);
+
+	while ((timer_get_cntct(timer) - start) < cycles)
+		cpu_relax();
+}
+
+static inline void udelay(unsigned long usec)
+{
+	__delay(usec_to_cycles(usec));
+}
+
+#endif /* SELFTEST_KVM_ARM_DELAY_H */
-- 
2.33.0.153.gba50c8fa24-goog


  parent reply	other threads:[~2021-09-01 21:14 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-01 21:14 [PATCH v3 00/12] KVM: arm64: selftests: Introduce arch_timer selftest Raghavendra Rao Ananta
2021-09-01 21:14 ` [PATCH v3 01/12] KVM: arm64: selftests: Add MMIO readl/writel support Raghavendra Rao Ananta
2021-09-01 21:23   ` Oliver Upton
2021-09-01 22:43     ` Raghavendra Rao Ananta
2021-09-02 20:17       ` Oliver Upton
2021-09-02 13:21   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 02/12] KVM: arm64: selftests: Add write_sysreg_s and read_sysreg_s Raghavendra Rao Ananta
2021-09-01 21:28   ` Oliver Upton
2021-09-01 22:08     ` Oliver Upton
2021-09-01 22:48       ` Raghavendra Rao Ananta
2021-09-01 23:06         ` Oliver Upton
2021-09-02 12:31           ` Andrew Jones
2021-09-02 17:55             ` Raghavendra Rao Ananta
2021-09-02 13:44   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 03/12] KVM: arm64: selftests: Add support for cpu_relax Raghavendra Rao Ananta
2021-09-01 21:29   ` Oliver Upton
2021-09-01 22:10   ` Oliver Upton
2021-09-02 13:46   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 04/12] KVM: arm64: selftests: Add basic support for arch_timers Raghavendra Rao Ananta
2021-09-02 14:12   ` Andrew Jones
2021-09-01 21:14 ` Raghavendra Rao Ananta [this message]
2021-09-02 14:35   ` [PATCH v3 05/12] KVM: arm64: selftests: Add basic support to generate delays Andrew Jones
2021-09-02 20:20   ` Oliver Upton
2021-09-01 21:14 ` [PATCH v3 06/12] KVM: arm64: selftests: Add support to disable and enable local IRQs Raghavendra Rao Ananta
2021-09-01 23:26   ` Oliver Upton
2021-09-02 14:43   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 07/12] KVM: arm64: selftests: Add support to get the vcpuid from MPIDR_EL1 Raghavendra Rao Ananta
2021-09-01 23:48   ` Oliver Upton
2021-09-02 12:36     ` Andrew Jones
2021-09-02 17:52       ` Raghavendra Rao Ananta
2021-09-01 21:14 ` [PATCH v3 08/12] KVM: arm64: selftests: Add light-weight spinlock support Raghavendra Rao Ananta
2021-09-02 21:06   ` Oliver Upton
2021-09-03  8:25   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 09/12] KVM: arm64: selftests: Add basic GICv3 support Raghavendra Rao Ananta
2021-09-03  9:37   ` Andrew Jones
2021-09-01 21:14 ` [PATCH v3 10/12] KVM: arm64: selftests: Add host support for vGIC Raghavendra Rao Ananta
2021-09-02 17:28   ` Ricardo Koller
2021-09-02 17:59     ` Raghavendra Rao Ananta
2021-09-03 10:00   ` Andrew Jones
2021-09-03 20:45     ` Raghavendra Rao Ananta
2021-09-03 10:51   ` Andrew Jones
2021-09-03 20:48     ` Raghavendra Rao Ananta
2021-09-01 21:14 ` [PATCH v3 11/12] KVM: arm64: selftests: Add arch_timer test Raghavendra Rao Ananta
2021-09-03 10:48   ` Andrew Jones
2021-09-03 20:42     ` Raghavendra Rao Ananta
2021-09-01 21:14 ` [PATCH v3 12/12] KVM: arm64: selftests: arch_timer: Support vCPU migration Raghavendra Rao Ananta
2021-09-03 11:05   ` Andrew Jones
2021-09-03 20:53     ` Raghavendra Rao Ananta
2021-09-06  6:39       ` Andrew Jones
2021-09-07 16:14         ` Raghavendra Rao Ananta
2021-09-07 16:20           ` Andrew Jones
2021-09-01 22:04 ` [PATCH v3 00/12] KVM: arm64: selftests: Introduce arch_timer selftest Oliver Upton
2021-09-01 22:05 ` Oliver Upton

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210901211412.4171835-6-rananta@google.com \
    --to=rananta@google.com \
    --cc=alexandru.elisei@arm.com \
    --cc=catalin.marinas@arm.com \
    --cc=james.morse@arm.com \
    --cc=jingzhangos@google.com \
    --cc=kvm@vger.kernel.org \
    --cc=kvmarm@lists.cs.columbia.edu \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=maz@kernel.org \
    --cc=oupton@google.com \
    --cc=pbonzini@redhat.com \
    --cc=pshier@google.com \
    --cc=reijiw@google.com \
    --cc=ricarkol@google.com \
    --cc=suzuki.poulose@arm.com \
    --cc=will@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).