From: Pierre Morel <pmorel@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com,
david@redhat.com, thuth@redhat.com, cohuck@redhat.com
Subject: [kvm-unit-tests PATCH v8 07/12] s390x: define function to wait for interrupt
Date: Mon, 8 Jun 2020 10:12:56 +0200 [thread overview]
Message-ID: <1591603981-16879-8-git-send-email-pmorel@linux.ibm.com> (raw)
In-Reply-To: <1591603981-16879-1-git-send-email-pmorel@linux.ibm.com>
Allow the program to wait for an interrupt.
The interrupt handler is in charge to remove the WAIT bit
when it finished handling the interrupt.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
---
lib/s390x/asm/arch_def.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h
index 12045ff..e0ced12 100644
--- a/lib/s390x/asm/arch_def.h
+++ b/lib/s390x/asm/arch_def.h
@@ -10,9 +10,11 @@
#ifndef _ASM_S390X_ARCH_DEF_H_
#define _ASM_S390X_ARCH_DEF_H_
+#define PSW_MASK_IO 0x0200000000000000UL
#define PSW_MASK_EXT 0x0100000000000000UL
#define PSW_MASK_DAT 0x0400000000000000UL
#define PSW_MASK_SHORT_PSW 0x0008000000000000UL
+#define PSW_MASK_WAIT 0x0002000000000000UL
#define PSW_MASK_PSTATE 0x0001000000000000UL
#define PSW_MASK_BA 0x0000000080000000UL
#define PSW_MASK_EA 0x0000000100000000UL
@@ -253,6 +255,18 @@ static inline void load_psw_mask(uint64_t mask)
: "+r" (tmp) : "a" (&psw) : "memory", "cc" );
}
+static inline void wait_for_interrupt(uint64_t irq_mask)
+{
+ uint64_t psw_mask = extract_psw_mask();
+
+ load_psw_mask(psw_mask | irq_mask | PSW_MASK_WAIT);
+ /*
+ * After being woken and having processed the interrupt, let's restore
+ * the PSW mask.
+ */
+ load_psw_mask(psw_mask);
+}
+
static inline void enter_pstate(void)
{
uint64_t mask;
--
2.25.1
next prev parent reply other threads:[~2020-06-08 8:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-08 8:12 [kvm-unit-tests PATCH v8 00/12] s390x: Testing the Channel Subsystem I/O Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 01/12] s390x: Use PSW bits definitions in cstart Pierre Morel
2020-06-08 8:43 ` Thomas Huth
2020-06-08 14:33 ` Pierre Morel
2020-06-08 14:52 ` Thomas Huth
2020-06-08 15:28 ` Pierre Morel
2020-06-08 15:30 ` Thomas Huth
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 02/12] s390x: Move control register bit definitions and add AFP to them Pierre Morel
2020-06-08 8:45 ` Thomas Huth
2020-06-08 14:25 ` Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 03/12] s390x: saving regs for interrupts Pierre Morel
2020-06-08 9:05 ` Thomas Huth
2020-06-08 14:24 ` Pierre Morel
2020-06-08 15:29 ` Thomas Huth
2020-06-08 16:03 ` Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 04/12] s390x: interrupt registration Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 05/12] s390x: export the clock get_clock_ms() utility Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 06/12] s390x: clock and delays caluculations Pierre Morel
2020-06-08 15:55 ` Thomas Huth
2020-06-08 16:16 ` Pierre Morel
2020-06-08 8:12 ` Pierre Morel [this message]
2020-06-09 5:07 ` [kvm-unit-tests PATCH v8 07/12] s390x: define function to wait for interrupt Thomas Huth
2020-06-09 7:54 ` Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 08/12] s390x: retrieve decimal and hexadecimal kernel parameters Pierre Morel
2020-06-09 5:21 ` Thomas Huth
2020-06-09 7:53 ` Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 09/12] s390x: Library resources for CSS tests Pierre Morel
2020-06-09 7:09 ` Thomas Huth
2020-06-09 15:01 ` Pierre Morel
2020-06-10 14:51 ` Thomas Huth
2020-06-10 15:10 ` Pierre Morel
2020-06-08 8:12 ` [kvm-unit-tests PATCH v8 10/12] s390x: css: stsch, enumeration test Pierre Morel
2020-06-09 7:39 ` Thomas Huth
2020-06-09 12:20 ` Pierre Morel
2020-06-10 15:54 ` Cornelia Huck
2020-06-08 8:13 ` [kvm-unit-tests PATCH v8 11/12] s390x: css: msch, enable test Pierre Morel
2020-06-09 7:47 ` Thomas Huth
2020-06-09 7:56 ` Pierre Morel
2020-06-08 8:13 ` [kvm-unit-tests PATCH v8 12/12] s390x: css: ssch/tsch with sense and interrupt Pierre Morel
2020-06-09 8:15 ` Thomas Huth
2020-06-09 12:02 ` Pierre Morel
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