The following commit has been merged into the x86/sev branch of tip:
Commit-ID: 4ae47fa7e8f95be17d4ff9c317a1193bbb4a3998
Gitweb: https://git.kernel.org/tip/4ae47fa7e8f95be17d4ff9c317a1193bbb4a3998
Author: Pavan Kumar Paluri <papaluri@xxxxxxx>
AuthorDate: Mon, 14 Oct 2024 08:09:47 -05:00
Committer: Borislav Petkov (AMD) <bp@xxxxxxxxx>
CommitterDate: Tue, 15 Oct 2024 19:54:42 +02:00
x86/virt: Move SEV-specific parsing into arch/x86/virt/svm
Move SEV-specific kernel command line option parsing support from
arch/x86/coco/sev/core.c to arch/x86/virt/svm/cmdline.c so that both
host and guest related SEV command line options can be supported.
No functional changes intended.
Signed-off-by: Pavan Kumar Paluri <papaluri@xxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
Link: https://lore.kernel.org/r/20241014130948.1476946-2-papaluri@xxxxxxx
---
arch/x86/coco/sev/core.c | 44 +------------------------------
arch/x86/include/asm/sev-common.h | 27 ++++++++++++++++++-
arch/x86/virt/svm/Makefile | 1 +-
arch/x86/virt/svm/cmdline.c | 33 +++++++++++++++++++++++-
4 files changed, 61 insertions(+), 44 deletions(-)
create mode 100644 arch/x86/virt/svm/cmdline.c
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index de1df0c..ff19e80 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -141,33 +141,6 @@ static DEFINE_PER_CPU(struct sev_es_save_area *, sev_vmsa);
static DEFINE_PER_CPU(struct svsm_ca *, svsm_caa);
static DEFINE_PER_CPU(u64, svsm_caa_pa);
-struct sev_config {
- __u64 debug : 1,
-
- /*
- * Indicates when the per-CPU GHCB has been created and registered
- * and thus can be used by the BSP instead of the early boot GHCB.
- *
- * For APs, the per-CPU GHCB is created before they are started
- * and registered upon startup, so this flag can be used globally
- * for the BSP and APs.
- */
- ghcbs_initialized : 1,
-
- /*
- * Indicates when the per-CPU SVSM CA is to be used instead of the
- * boot SVSM CA.
- *
- * For APs, the per-CPU SVSM CA is created as part of the AP
- * bringup, so this flag can be used globally for the BSP and APs.
- */
- use_cas : 1,
-
- __reserved : 61;
-};
-
-static struct sev_config sev_cfg __read_mostly;
-
static __always_inline bool on_vc_stack(struct pt_regs *regs)
{
unsigned long sp = regs->sp;
@@ -2374,23 +2347,6 @@ static int __init report_snp_info(void)
}
arch_initcall(report_snp_info);
-static int __init init_sev_config(char *str)
-{
- char *s;
-
- while ((s = strsep(&str, ","))) {
- if (!strcmp(s, "debug")) {
- sev_cfg.debug = true;
- continue;
- }
-
- pr_info("SEV command-line option '%s' was not recognized\n", s);
- }
-
- return 1;
-}
-__setup("sev=", init_sev_config);
-
static void update_attest_input(struct svsm_call *call, struct svsm_attest_call *input)
{
/* If (new) lengths have been returned, propagate them up */
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index 98726c2..50f5666 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -220,4 +220,31 @@ struct snp_psc_desc {
#define GHCB_ERR_INVALID_INPUT 5
#define GHCB_ERR_INVALID_EVENT 6
+struct sev_config {
+ __u64 debug : 1,
+
+ /*
+ * Indicates when the per-CPU GHCB has been created and registered
+ * and thus can be used by the BSP instead of the early boot GHCB.
+ *
+ * For APs, the per-CPU GHCB is created before they are started
+ * and registered upon startup, so this flag can be used globally
+ * for the BSP and APs.
+ */
+ ghcbs_initialized : 1,
+
+ /*
+ * Indicates when the per-CPU SVSM CA is to be used instead of the
+ * boot SVSM CA.
+ *
+ * For APs, the per-CPU SVSM CA is created as part of the AP
+ * bringup, so this flag can be used globally for the BSP and APs.
+ */
+ use_cas : 1,
+
+ __reserved : 61;
+};
+
+extern struct sev_config sev_cfg;
+
#endif
diff --git a/arch/x86/virt/svm/Makefile b/arch/x86/virt/svm/Makefile
index ef2a31b..eca6d71 100644
--- a/arch/x86/virt/svm/Makefile
+++ b/arch/x86/virt/svm/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_KVM_AMD_SEV) += sev.o
+obj-$(CONFIG_CPU_SUP_AMD) += cmdline.o
diff --git a/arch/x86/virt/svm/cmdline.c b/arch/x86/virt/svm/cmdline.c
new file mode 100644
index 0000000..add4bae
--- /dev/null
+++ b/arch/x86/virt/svm/cmdline.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AMD SVM-SEV command line parsing support
+ *
+ * Copyright (C) 2023 - 2024 Advanced Micro Devices, Inc.
+ *
+ * Author: Michael Roth <michael.roth@xxxxxxx>
+ */
+
+#include <linux/string.h>
+#include <linux/printk.h>
+#include <linux/cache.h>
+
+#include <asm/sev-common.h>
+
+struct sev_config sev_cfg __read_mostly;
+
+static int __init init_sev_config(char *str)
+{
+ char *s;
+
+ while ((s = strsep(&str, ","))) {
+ if (!strcmp(s, "debug")) {
+ sev_cfg.debug = true;
+ continue;
+ }
+
+ pr_info("SEV command-line option '%s' was not recognized\n", s);
+ }
+
+ return 1;
+}
+__setup("sev=", init_sev_config);
|