1 files changed, 0 insertions, 78 deletions
diff --git a/sys/arch/amd64/spectre.c b/sys/arch/amd64/spectre.c
deleted file mode 100644
index a0be8fc..0000000
--- a/sys/arch/amd64/spectre.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (c) 2023 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <machine/spectre.h>
-#include <machine/cpuid.h>
-#include <machine/msr.h>
-#include <sys/syslog.h>
-#include <sys/types.h>
-
-__MODULE_NAME("spectre");
-__KERNEL_META("$Hyra$: spectre.c, Ian Marco Moffett, "
-              "Spectre mitigation support");
-
-#if __SPECTRE_MITIGATION == 1
-
-/*
- * Returns true if Indirect Branch Restricted Speculation (IBRS)
- * is supported.
- */
-__naked bool
-__can_mitigate_spectre(void);
-
-/*
- * Returns EXIT_FAILURE if not supported, returns
- * EXIT_SUCCESS if mitigation is now active.
- *
- * This function will be NULL if spectre mitigation isn't enabled;
- * therefore it is wise to verify to prevent access violations and
- * undefined behaviour.
- *
- * This behaviour is governed by the __SPECTRE_MITIGATION define
- *
- * TODO: Try to enable others, not just IBRS
- */
-__weak int
-try_spectre_mitigate(void)
-{
-    uint64_t tmp;
-
-    if (!__can_mitigate_spectre()) {
-        KINFO("IBRS not supported; spectre mitigation NOT enabled\n");
-        return EXIT_FAILURE;
-    }
-
-    KINFO("IBRS supported; spectre mitigation enabled\n");
-    tmp = rdmsr(IA32_SPEC_CTL);
-    tmp |= __BIT(0);                /* IBRS */
-    wrmsr(IA32_SPEC_CTL, tmp);
-    return EXIT_SUCCESS;
-}
-
-#endif      /* __SPECTRE_MITIGATION == 1 */