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[PULL 3/9] qemu/timer: Add host ticks function for RISC-V
From: |
Paolo Bonzini |
Subject: |
[PULL 3/9] qemu/timer: Add host ticks function for RISC-V |
Date: |
Fri, 22 Sep 2023 17:42:22 +0200 |
From: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Signed-off-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Message-ID: <20230911063223.742-1-zhiwei_liu@linux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
include/qemu/timer.h | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/include/qemu/timer.h b/include/qemu/timer.h
index 9a91cb1248a..9a366e551fb 100644
--- a/include/qemu/timer.h
+++ b/include/qemu/timer.h
@@ -979,6 +979,28 @@ static inline int64_t cpu_get_host_ticks(void)
return cur - ofs;
}
+#elif defined(__riscv) && __riscv_xlen == 32
+static inline int64_t cpu_get_host_ticks(void)
+{
+ uint32_t lo, hi, tmph;
+ do {
+ asm volatile("RDTIMEH %0\n\t"
+ "RDTIME %1\n\t"
+ "RDTIMEH %2"
+ : "=r"(hi), "=r"(lo), "=r"(tmph));
+ } while (unlikely(tmph != hi));
+ return lo | (uint64_t)hi << 32;
+}
+
+#elif defined(__riscv) && __riscv_xlen > 32
+static inline int64_t cpu_get_host_ticks(void)
+{
+ int64_t val;
+
+ asm volatile("RDTIME %0" : "=r"(val));
+ return val;
+}
+
#else
/* The host CPU doesn't have an easily accessible cycle counter.
Just return a monotonically increasing value. This will be
--
2.41.0
- [PULL v2 0/9] i386, audio changes for 2023-09-22, Paolo Bonzini, 2023/09/22
- [PULL 1/9] target/i386: enumerate bit 56 of MSR_IA32_VMX_BASIC, Paolo Bonzini, 2023/09/22
- [PULL 2/9] target/i386: Export GDS_NO bit to guests, Paolo Bonzini, 2023/09/22
- [PULL 3/9] qemu/timer: Add host ticks function for RISC-V,
Paolo Bonzini <=
- [PULL 4/9] hw/input/tsc210x: Extract common init code into new function, Paolo Bonzini, 2023/09/22
- [PULL 5/9] hw/audio: Simplify hda audio init, Paolo Bonzini, 2023/09/22
- [PULL 6/9] hw/audio/lm4549: Add errp error reporting to init function, Paolo Bonzini, 2023/09/22
- [PULL 7/9] hw/display/xlnx_dp.c: Add audiodev property, Paolo Bonzini, 2023/09/22
- [PULL 8/9] tests/qtest: Specify audiodev= and -audiodev, Paolo Bonzini, 2023/09/22
- [PULL 9/9] vl: recognize audiodev groups in configuration files, Paolo Bonzini, 2023/09/22
- Re: [PULL v2 0/9] i386, audio changes for 2023-09-22, Stefan Hajnoczi, 2023/09/25