Date: Wed, 5 Feb 2025 09:34:42 GMT From: Ruslan Bukin <br@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 6492ef7b832c - main - bhyve: Sleep for a short period after VM_EXITCODE_DEBUG exits Message-ID: <202502050934.5159Yg7M025643@gitrepo.freebsd.org>
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The branch main has been updated by br: URL: https://cgit.FreeBSD.org/src/commit/?id=6492ef7b832c9dcb07784aaf752cb71682bd0444 commit 6492ef7b832c9dcb07784aaf752cb71682bd0444 Author: Ruslan Bukin <br@FreeBSD.org> AuthorDate: 2025-02-05 09:30:50 +0000 Commit: Ruslan Bukin <br@FreeBSD.org> CommitDate: 2025-02-05 09:30:58 +0000 bhyve: Sleep for a short period after VM_EXITCODE_DEBUG exits Apply 2e2b8afa52da6 for RISC-V: As on amd64 and aarch64 APs will repeatedly exit until they are brought online, so this hack helps avoid burning CPU time during guest bootup. Reviewed by: corvink, markj Differential Revision: https://reviews.freebsd.org/D48811 --- usr.sbin/bhyve/riscv/vmexit.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/usr.sbin/bhyve/riscv/vmexit.c b/usr.sbin/bhyve/riscv/vmexit.c index e2efd53bdede..233dba9f3c7f 100644 --- a/usr.sbin/bhyve/riscv/vmexit.c +++ b/usr.sbin/bhyve/riscv/vmexit.c @@ -47,6 +47,7 @@ #include <stdbool.h> #include <stdio.h> #include <stdlib.h> +#include <unistd.h> #include <vmmapi.h> @@ -135,6 +136,12 @@ vmexit_debug(struct vmctx *ctx __unused, struct vcpu *vcpu __unused, struct vm_run *vmrun __unused) { + /* + * XXX-MJ sleep for a short period to avoid chewing up the CPU in the + * window between activation of the vCPU thread and the + * SBI_HSM_HART_START request. + */ + usleep(1000); return (VMEXIT_CONTINUE); }
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