#include "../../lib/inat.c"
#include "../../lib/insn.c"
-/* Include code for early handlers */
-#include "../../coco/sev/shared.c"
+extern struct svsm_ca *boot_svsm_caa;
+extern u64 boot_svsm_caa_pa;
-static struct svsm_ca *svsm_get_caa(void)
+struct svsm_ca *svsm_get_caa(void)
{
return boot_svsm_caa;
}
-static u64 svsm_get_caa_pa(void)
+u64 svsm_get_caa_pa(void)
{
return boot_svsm_caa_pa;
}
-static int svsm_perform_call_protocol(struct svsm_call *call)
+int svsm_perform_call_protocol(struct svsm_call *call);
+
+/* Include code for early handlers */
+#include "../../coco/sev/shared.c"
+
+int svsm_perform_call_protocol(struct svsm_call *call)
{
struct ghcb *ghcb;
int ret;
#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>
#include <asm/sev.h>
+#include <asm/sev-internal.h>
#include <asm/insn-eval.h>
#include <asm/fpu/xcr.h>
#include <asm/processor.h>
#include <asm/cpuid.h>
#include <asm/cmdline.h>
-#define DR7_RESET_VALUE 0x400
-
/* AP INIT values as documented in the APM2 section "Processor Initialization State" */
#define AP_INIT_CS_LIMIT 0xffff
#define AP_INIT_DS_LIMIT 0xffff
};
/* For early boot hypervisor communication in SEV-ES enabled guests */
-static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE);
+struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE);
/*
* Needs to be in the .data section because we need it NULL before bss is
* cleared
*/
-static struct ghcb *boot_ghcb __section(".data");
+struct ghcb *boot_ghcb __section(".data");
/* Bitmap of SEV features supported by the hypervisor */
-static u64 sev_hv_features __ro_after_init;
+u64 sev_hv_features __ro_after_init;
/* Secrets page physical address from the CC blob */
static u64 secrets_pa __ro_after_init;
static u64 snp_tsc_offset __ro_after_init;
static u64 snp_tsc_freq_khz __ro_after_init;
-/* #VC handler runtime per-CPU data */
-struct sev_es_runtime_data {
- struct ghcb ghcb_page;
-
- /*
- * Reserve one page per CPU as backup storage for the unencrypted GHCB.
- * It is needed when an NMI happens while the #VC handler uses the real
- * GHCB, and the NMI handler itself is causing another #VC exception. In
- * that case the GHCB content of the first handler needs to be backed up
- * and restored.
- */
- struct ghcb backup_ghcb;
-
- /*
- * Mark the per-cpu GHCBs as in-use to detect nested #VC exceptions.
- * There is no need for it to be atomic, because nothing is written to
- * the GHCB between the read and the write of ghcb_active. So it is safe
- * to use it when a nested #VC exception happens before the write.
- *
- * This is necessary for example in the #VC->NMI->#VC case when the NMI
- * happens while the first #VC handler uses the GHCB. When the NMI code
- * raises a second #VC handler it might overwrite the contents of the
- * GHCB written by the first handler. To avoid this the content of the
- * GHCB is saved and restored when the GHCB is detected to be in use
- * already.
- */
- bool ghcb_active;
- bool backup_ghcb_active;
-
- /*
- * Cached DR7 value - write it on DR7 writes and return it on reads.
- * That value will never make it to the real hardware DR7 as debugging
- * is currently unsupported in SEV-ES guests.
- */
- unsigned long dr7;
-};
-
-struct ghcb_state {
- struct ghcb *ghcb;
-};
/* For early boot SVSM communication */
-static struct svsm_ca boot_svsm_ca_page __aligned(PAGE_SIZE);
+struct svsm_ca boot_svsm_ca_page __aligned(PAGE_SIZE);
-static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
-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);
+DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
+DEFINE_PER_CPU(struct sev_es_save_area *, sev_vmsa);
+DEFINE_PER_CPU(struct svsm_ca *, svsm_caa);
+DEFINE_PER_CPU(u64, svsm_caa_pa);
static __always_inline bool on_vc_stack(struct pt_regs *regs)
{
*
* Callers must disable local interrupts around it.
*/
-static noinstr struct ghcb *__sev_get_ghcb(struct ghcb_state *state)
+noinstr struct ghcb *__sev_get_ghcb(struct ghcb_state *state)
{
struct sev_es_runtime_data *data;
struct ghcb *ghcb;
return ghcb;
}
-static inline u64 sev_es_rd_ghcb_msr(void)
-{
- return __rdmsr(MSR_AMD64_SEV_ES_GHCB);
-}
-
-static __always_inline void sev_es_wr_ghcb_msr(u64 val)
-{
- u32 low, high;
-
- low = (u32)(val);
- high = (u32)(val >> 32);
-
- native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high);
-}
-
static int vc_fetch_insn_kernel(struct es_em_ctxt *ctxt,
unsigned char *buffer)
{
/* Include code shared with pre-decompression boot stage */
#include "shared.c"
-static inline struct svsm_ca *svsm_get_caa(void)
-{
- /*
- * Use rIP-relative references when called early in the boot. If
- * ->use_cas is set, then it is late in the boot and no need
- * to worry about rIP-relative references.
- */
- if (RIP_REL_REF(sev_cfg).use_cas)
- return this_cpu_read(svsm_caa);
- else
- return RIP_REL_REF(boot_svsm_caa);
-}
-
-static u64 svsm_get_caa_pa(void)
-{
- /*
- * Use rIP-relative references when called early in the boot. If
- * ->use_cas is set, then it is late in the boot and no need
- * to worry about rIP-relative references.
- */
- if (RIP_REL_REF(sev_cfg).use_cas)
- return this_cpu_read(svsm_caa_pa);
- else
- return RIP_REL_REF(boot_svsm_caa_pa);
-}
-
-static noinstr void __sev_put_ghcb(struct ghcb_state *state)
+noinstr void __sev_put_ghcb(struct ghcb_state *state)
{
struct sev_es_runtime_data *data;
struct ghcb *ghcb;
}
}
-static int svsm_perform_call_protocol(struct svsm_call *call)
+int svsm_perform_call_protocol(struct svsm_call *call)
{
struct ghcb_state state;
unsigned long flags;
return ret;
}
-static void __head
+void __head
early_set_pages_state(unsigned long vaddr, unsigned long paddr,
unsigned long npages, enum psc_op op)
{
*/
u8 snp_vmpl __ro_after_init;
EXPORT_SYMBOL_GPL(snp_vmpl);
-static struct svsm_ca *boot_svsm_caa __ro_after_init;
-static u64 boot_svsm_caa_pa __ro_after_init;
-
-static struct svsm_ca *svsm_get_caa(void);
-static u64 svsm_get_caa_pa(void);
-static int svsm_perform_call_protocol(struct svsm_call *call);
+struct svsm_ca *boot_svsm_caa __ro_after_init;
+u64 boot_svsm_caa_pa __ro_after_init;
/* I/O parameters for CPUID-related helpers */
struct cpuid_leaf {
u32 edx;
};
-/*
- * Individual entries of the SNP CPUID table, as defined by the SNP
- * Firmware ABI, Revision 0.9, Section 7.1, Table 14.
- */
-struct snp_cpuid_fn {
- u32 eax_in;
- u32 ecx_in;
- u64 xcr0_in;
- u64 xss_in;
- u32 eax;
- u32 ebx;
- u32 ecx;
- u32 edx;
- u64 __reserved;
-} __packed;
-
-/*
- * SNP CPUID table, as defined by the SNP Firmware ABI, Revision 0.9,
- * Section 8.14.2.6. Also noted there is the SNP firmware-enforced limit
- * of 64 entries per CPUID table.
- */
-#define SNP_CPUID_COUNT_MAX 64
-
-struct snp_cpuid_table {
- u32 count;
- u32 __reserved1;
- u64 __reserved2;
- struct snp_cpuid_fn fn[SNP_CPUID_COUNT_MAX];
-} __packed;
-
/*
* Since feature negotiation related variables are set early in the boot
* process they must reside in the .data section so as not to be zeroed
static u32 cpuid_hyp_range_max __ro_after_init;
static u32 cpuid_ext_range_max __ro_after_init;
-static bool __init sev_es_check_cpu_features(void)
+bool __init sev_es_check_cpu_features(void)
{
if (!has_cpuflag(X86_FEATURE_RDRAND)) {
error("RDRAND instruction not supported - no trusted source of randomness available\n");
return true;
}
-static void __head __noreturn
+void __head __noreturn
sev_es_terminate(unsigned int set, unsigned int reason)
{
u64 val = GHCB_MSR_TERM_REQ;
/*
* The hypervisor features are available from GHCB version 2 onward.
*/
-static u64 get_hv_features(void)
+u64 get_hv_features(void)
{
u64 val;
return GHCB_MSR_HV_FT_RESP_VAL(val);
}
-static void snp_register_ghcb_early(unsigned long paddr)
+void snp_register_ghcb_early(unsigned long paddr)
{
unsigned long pfn = paddr >> PAGE_SHIFT;
u64 val;
sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_REGISTER);
}
-static bool sev_es_negotiate_protocol(void)
+bool sev_es_negotiate_protocol(void)
{
u64 val;
return true;
}
-static __always_inline void vc_ghcb_invalidate(struct ghcb *ghcb)
-{
- ghcb->save.sw_exit_code = 0;
- __builtin_memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
-}
-
static bool vc_decoding_needed(unsigned long exit_code)
{
/* Exceptions don't require to decode the instruction */
return svsm_process_result_codes(call);
}
-static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
- struct es_em_ctxt *ctxt,
- u64 exit_code, u64 exit_info_1,
- u64 exit_info_2)
+enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ u64 exit_code, u64 exit_info_1,
+ u64 exit_info_2)
{
/* Fill in protocol and format specifiers */
ghcb->protocol_version = ghcb_version;
* while running with the initial identity mapping as well as the
* switch-over to kernel virtual addresses later.
*/
-static const struct snp_cpuid_table *snp_cpuid_get_table(void)
+const struct snp_cpuid_table *snp_cpuid_get_table(void)
{
return rip_rel_ptr(&cpuid_table_copy);
}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#define DR7_RESET_VALUE 0x400
+
+extern struct ghcb boot_ghcb_page;
+extern struct ghcb *boot_ghcb;
+extern u64 sev_hv_features;
+
+/* #VC handler runtime per-CPU data */
+struct sev_es_runtime_data {
+ struct ghcb ghcb_page;
+
+ /*
+ * Reserve one page per CPU as backup storage for the unencrypted GHCB.
+ * It is needed when an NMI happens while the #VC handler uses the real
+ * GHCB, and the NMI handler itself is causing another #VC exception. In
+ * that case the GHCB content of the first handler needs to be backed up
+ * and restored.
+ */
+ struct ghcb backup_ghcb;
+
+ /*
+ * Mark the per-cpu GHCBs as in-use to detect nested #VC exceptions.
+ * There is no need for it to be atomic, because nothing is written to
+ * the GHCB between the read and the write of ghcb_active. So it is safe
+ * to use it when a nested #VC exception happens before the write.
+ *
+ * This is necessary for example in the #VC->NMI->#VC case when the NMI
+ * happens while the first #VC handler uses the GHCB. When the NMI code
+ * raises a second #VC handler it might overwrite the contents of the
+ * GHCB written by the first handler. To avoid this the content of the
+ * GHCB is saved and restored when the GHCB is detected to be in use
+ * already.
+ */
+ bool ghcb_active;
+ bool backup_ghcb_active;
+
+ /*
+ * Cached DR7 value - write it on DR7 writes and return it on reads.
+ * That value will never make it to the real hardware DR7 as debugging
+ * is currently unsupported in SEV-ES guests.
+ */
+ unsigned long dr7;
+};
+
+struct ghcb_state {
+ struct ghcb *ghcb;
+};
+
+extern struct svsm_ca boot_svsm_ca_page;
+
+struct ghcb *__sev_get_ghcb(struct ghcb_state *state);
+void __sev_put_ghcb(struct ghcb_state *state);
+
+DECLARE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
+DECLARE_PER_CPU(struct sev_es_save_area *, sev_vmsa);
+
+void early_set_pages_state(unsigned long vaddr, unsigned long paddr,
+ unsigned long npages, enum psc_op op);
+
+void __noreturn sev_es_terminate(unsigned int set, unsigned int reason);
+
+DECLARE_PER_CPU(struct svsm_ca *, svsm_caa);
+DECLARE_PER_CPU(u64, svsm_caa_pa);
+
+extern struct svsm_ca *boot_svsm_caa;
+extern u64 boot_svsm_caa_pa;
+
+static __always_inline struct svsm_ca *svsm_get_caa(void)
+{
+ /*
+ * Use rIP-relative references when called early in the boot. If
+ * ->use_cas is set, then it is late in the boot and no need
+ * to worry about rIP-relative references.
+ */
+ if (RIP_REL_REF(sev_cfg).use_cas)
+ return this_cpu_read(svsm_caa);
+ else
+ return RIP_REL_REF(boot_svsm_caa);
+}
+
+static __always_inline u64 svsm_get_caa_pa(void)
+{
+ /*
+ * Use rIP-relative references when called early in the boot. If
+ * ->use_cas is set, then it is late in the boot and no need
+ * to worry about rIP-relative references.
+ */
+ if (RIP_REL_REF(sev_cfg).use_cas)
+ return this_cpu_read(svsm_caa_pa);
+ else
+ return RIP_REL_REF(boot_svsm_caa_pa);
+}
+
+int svsm_perform_call_protocol(struct svsm_call *call);
+
+static inline u64 sev_es_rd_ghcb_msr(void)
+{
+ return __rdmsr(MSR_AMD64_SEV_ES_GHCB);
+}
+
+static __always_inline void sev_es_wr_ghcb_msr(u64 val)
+{
+ u32 low, high;
+
+ low = (u32)(val);
+ high = (u32)(val >> 32);
+
+ native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high);
+}
+
+enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ u64 exit_code, u64 exit_info_1,
+ u64 exit_info_2);
+
+void snp_register_ghcb_early(unsigned long paddr);
+bool sev_es_negotiate_protocol(void);
+bool sev_es_check_cpu_features(void);
+u64 get_hv_features(void);
+
+const struct snp_cpuid_table *snp_cpuid_get_table(void);
#include <asm/sev-common.h>
#include <asm/coco.h>
#include <asm/set_memory.h>
+#include <asm/svm.h>
#define GHCB_PROTOCOL_MIN 1ULL
#define GHCB_PROTOCOL_MAX 2ULL
extern void vc_boot_ghcb(void);
extern bool handle_vc_boot_ghcb(struct pt_regs *regs);
+/*
+ * Individual entries of the SNP CPUID table, as defined by the SNP
+ * Firmware ABI, Revision 0.9, Section 7.1, Table 14.
+ */
+struct snp_cpuid_fn {
+ u32 eax_in;
+ u32 ecx_in;
+ u64 xcr0_in;
+ u64 xss_in;
+ u32 eax;
+ u32 ebx;
+ u32 ecx;
+ u32 edx;
+ u64 __reserved;
+} __packed;
+
+/*
+ * SNP CPUID table, as defined by the SNP Firmware ABI, Revision 0.9,
+ * Section 8.14.2.6. Also noted there is the SNP firmware-enforced limit
+ * of 64 entries per CPUID table.
+ */
+#define SNP_CPUID_COUNT_MAX 64
+
+struct snp_cpuid_table {
+ u32 count;
+ u32 __reserved1;
+ u64 __reserved2;
+ struct snp_cpuid_fn fn[SNP_CPUID_COUNT_MAX];
+} __packed;
+
/* PVALIDATE return codes */
#define PVALIDATE_FAIL_SIZEMISMATCH 6
void __init snp_secure_tsc_prepare(void);
void __init snp_secure_tsc_init(void);
+static __always_inline void vc_ghcb_invalidate(struct ghcb *ghcb)
+{
+ ghcb->save.sw_exit_code = 0;
+ __builtin_memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
+}
+
#else /* !CONFIG_AMD_MEM_ENCRYPT */
#define snp_vmpl 0
projects / thirdparty / kernel / linux.git / commitdiff
