From 10e2fc7e3c6a924923664cf2919393b7f7b37326 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 13 Mar 2024 21:20:25 -0400 Subject: kernel/amd64: spectre: Log only once Signed-off-by: Ian Moffett --- sys/arch/amd64/amd64/spectre.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'sys/arch/amd64') diff --git a/sys/arch/amd64/amd64/spectre.c b/sys/arch/amd64/amd64/spectre.c index 1247607..05aa557 100644 --- a/sys/arch/amd64/amd64/spectre.c +++ b/sys/arch/amd64/amd64/spectre.c @@ -62,13 +62,18 @@ __weak int try_spectre_mitigate(void) { uint64_t tmp; + static bool should_log = true; if (!__can_mitigate_spectre()) { KINFO("IBRS not supported; spectre mitigation NOT enabled\n"); return EXIT_FAILURE; } - KINFO("IBRS supported; spectre mitigation enabled\n"); + /* This is called per processor, only log once */ + if (should_log) { + KINFO("IBRS supported; spectre mitigation enabled\n"); + should_log = false; + } tmp = rdmsr(IA32_SPEC_CTL); tmp |= __BIT(0); /* IBRS */ -- cgit v1.2.3