[PATCH v3 15/19] x86/sev: Make all code reachable from 1:1 mapping __pitext

Ard Biesheuvel
2024-01-29T18:06:06Z

From: Ard Biesheuvel <ardb@kernel.org>

We cannot safely call any code when still executing from the 1:1 mapping
at early boot. The SEV init code in particular does a fair amount of
work this early, and calls into ordinary APIs, which is not safe, as
these may be instrumented by the sanitizers or by things link
CONFIG_DEBUG_VM or CONFIG_DEBUG_VIRTUAL.

So annotate all SEV code used early as __pitext and along with it, some
of the shared code that it relies on. Also override some definition of
the __pa/__va translation macros to avoid pulling in debug versions.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/x86/boot/compressed/sev.c | 6 +++
arch/x86/include/asm/mem_encrypt.h | 8 ++--
arch/x86/include/asm/pgtable_64.h | 12 +++++-
arch/x86/include/asm/sev.h | 6 +--
arch/x86/kernel/head64.c | 20 ++++++----
arch/x86/kernel/sev-shared.c | 40 +++++++++++---------
arch/x86/kernel/sev.c | 14 +++----
arch/x86/lib/memcpy_64.S | 3 +-
arch/x86/lib/memset_64.S | 3 +-
arch/x86/mm/mem_encrypt_boot.S | 3 +-
arch/x86/mm/mem_encrypt_identity.c | 35 ++++++++---------
11 files changed, 90 insertions(+), 60 deletions(-)

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index 073291832f44..ada6cd8d600b 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -25,6 +25,9 @@
#include "error.h"
#include "../msr.h"

+#undef __pa_nodebug
+#define __pa_nodebug __pa
+
static struct ghcb boot_ghcb_page __aligned(PAGE_SIZE);
struct ghcb *boot_ghcb;

@@ -116,6 +119,9 @@ static bool fault_in_kernel_space(unsigned long address)
#undef __init
#define __init

+#undef __pitext
+#define __pitext
+
#define __BOOT_COMPRESSED

/* Basic instruction decoding support needed */
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h
index 359ada486fa9..48469e22a75e 100644
--- a/arch/x86/include/asm/mem_encrypt.h
+++ b/arch/x86/include/asm/mem_encrypt.h
@@ -46,8 +46,8 @@ void __init sme_unmap_bootdata(char *real_mode_data);

void __init sme_early_init(void);

-void __init sme_encrypt_kernel(struct boot_params *bp);
-void __init sme_enable(struct boot_params *bp);
+void sme_encrypt_kernel(struct boot_params *bp);
+void sme_enable(struct boot_params *bp);

int __init early_set_memory_decrypted(unsigned long vaddr, unsigned long size);
int __init early_set_memory_encrypted(unsigned long vaddr, unsigned long size);
@@ -75,8 +75,8 @@ static inline void __init sme_unmap_bootdata(char *real_mode_data) { }

static inline void __init sme_early_init(void) { }

-static inline void __init sme_encrypt_kernel(struct boot_params *bp) { }
-static inline void __init sme_enable(struct boot_params *bp) { }
+static inline void sme_encrypt_kernel(struct boot_params *bp) { }
+static inline void sme_enable(struct boot_params *bp) { }

static inline void sev_es_init_vc_handling(void) { }

diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 24af25b1551a..3a6d90f47f32 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -139,12 +139,17 @@ static inline pud_t native_pudp_get_and_clear(pud_t *xp)
#endif
}

+static inline void set_p4d_kernel(p4d_t *p4dp, p4d_t p4d)
+{
+ WRITE_ONCE(*p4dp, p4d);
+}
+
static inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d)
{
pgd_t pgd;

if (pgtable_l5_enabled() || !IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION)) {
- WRITE_ONCE(*p4dp, p4d);
+ set_p4d_kernel(p4dp, p4d);
return;
}

@@ -158,6 +163,11 @@ static inline void native_p4d_clear(p4d_t *p4d)
native_set_p4d(p4d, native_make_p4d(0));
}

+static inline void set_pgd_kernel(pgd_t *pgdp, pgd_t pgd)
+{
+ WRITE_ONCE(*pgdp, pgd);
+}
+
static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
{
WRITE_ONCE(*pgdp, pti_set_user_pgtbl(pgdp, pgd));
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
index 5b4a1ce3d368..e3b55bd15ce1 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -201,14 +201,14 @@ struct snp_guest_request_ioctl;
void setup_ghcb(void);
void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr,
unsigned long npages);
-void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
- unsigned long npages);
+void early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
+ unsigned long npages);
void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op);
void snp_set_memory_shared(unsigned long vaddr, unsigned long npages);
void snp_set_memory_private(unsigned long vaddr, unsigned long npages);
void snp_set_wakeup_secondary_cpu(void);
bool snp_init(struct boot_params *bp);
-void __init __noreturn snp_abort(void);
+void __noreturn snp_abort(void);
int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio);
void snp_accept_memory(phys_addr_t start, phys_addr_t end);
u64 snp_get_unsupported_features(u64 status);
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 0ecd36f5326a..b014f81e0eac 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -91,16 +91,20 @@ static unsigned long __pitext sme_postprocess_startup(struct boot_params *bp,

for (; vaddr < vaddr_end; vaddr += PMD_SIZE) {
/*
- * On SNP, transition the page to shared in the RMP table so that
- * it is consistent with the page table attribute change.
+ * On SNP, transition the page to shared in the RMP
+ * table so that it is consistent with the page table
+ * attribute change.
*
- * __start_bss_decrypted has a virtual address in the high range
- * mapping (kernel .text). PVALIDATE, by way of
- * early_snp_set_memory_shared(), requires a valid virtual
- * address but the kernel is currently running off of the identity
- * mapping so use __pa() to get a *currently* valid virtual address.
+ * __start_bss_decrypted has a virtual address in the
+ * high range mapping (kernel .text). PVALIDATE, by way
+ * of early_snp_set_memory_shared(), requires a valid
+ * virtual address but the kernel is currently running
+ * off of the identity mapping so use __pa() to get a
+ * *currently* valid virtual address.
*/
- early_snp_set_memory_shared(__pa(vaddr), __pa(vaddr), PTRS_PER_PMD);
+ early_snp_set_memory_shared(__pa_nodebug(vaddr),
+ __pa_nodebug(vaddr),
+ PTRS_PER_PMD);

i = pmd_index(vaddr);
pmd[i] -= sme_get_me_mask();
diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c
index 5db24d0fc557..481dbd009ce9 100644
--- a/arch/x86/kernel/sev-shared.c
+++ b/arch/x86/kernel/sev-shared.c
@@ -93,7 +93,8 @@ static bool __init sev_es_check_cpu_features(void)
return true;
}

-static void __noreturn sev_es_terminate(unsigned int set, unsigned int reason)
+static __always_inline void __noreturn sev_es_terminate(unsigned int set,
+ unsigned int reason)
{
u64 val = GHCB_MSR_TERM_REQ;

@@ -226,10 +227,9 @@ static enum es_result verify_exception_info(struct ghcb *ghcb, struct es_em_ctxt
return ES_VMM_ERROR;
}

-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)
+static enum es_result __pitext
+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;
@@ -239,13 +239,13 @@ static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
ghcb_set_sw_exit_info_1(ghcb, exit_info_1);
ghcb_set_sw_exit_info_2(ghcb, exit_info_2);

- sev_es_wr_ghcb_msr(__pa(ghcb));
+ sev_es_wr_ghcb_msr(__pa_nodebug(ghcb));
VMGEXIT();

return verify_exception_info(ghcb, ctxt);
}

-static int __sev_cpuid_hv(u32 fn, int reg_idx, u32 *reg)
+static int __pitext __sev_cpuid_hv(u32 fn, int reg_idx, u32 *reg)
{
u64 val;

@@ -260,7 +260,7 @@ static int __sev_cpuid_hv(u32 fn, int reg_idx, u32 *reg)
return 0;
}

-static int __sev_cpuid_hv_msr(struct cpuid_leaf *leaf)
+static int __pitext __sev_cpuid_hv_msr(struct cpuid_leaf *leaf)
{
int ret;

@@ -283,7 +283,9 @@ static int __sev_cpuid_hv_msr(struct cpuid_leaf *leaf)
return ret;
}

-static int __sev_cpuid_hv_ghcb(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
+static int __pitext __sev_cpuid_hv_ghcb(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ struct cpuid_leaf *leaf)
{
u32 cr4 = native_read_cr4();
int ret;
@@ -316,7 +318,8 @@ static int __sev_cpuid_hv_ghcb(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struc
return ES_OK;
}

-static int sev_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
+static int __pitext sev_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
+ struct cpuid_leaf *leaf)
{
return ghcb ? __sev_cpuid_hv_ghcb(ghcb, ctxt, leaf)
: __sev_cpuid_hv_msr(leaf);
@@ -395,7 +398,7 @@ static u32 snp_cpuid_calc_xsave_size(u64 xfeatures_en, bool compacted)
return xsave_size;
}

-static bool
+static bool __pitext
snp_cpuid_get_validated_func(struct cpuid_leaf *leaf)
{
const struct snp_cpuid_table *cpuid_table = snp_cpuid_get_table();
@@ -431,14 +434,16 @@ snp_cpuid_get_validated_func(struct cpuid_leaf *leaf)
return false;
}

-static void snp_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
+static void __pitext snp_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
+ struct cpuid_leaf *leaf)
{
if (sev_cpuid_hv(ghcb, ctxt, leaf))
sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_CPUID_HV);
}

-static int snp_cpuid_postprocess(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
- struct cpuid_leaf *leaf)
+static int __pitext snp_cpuid_postprocess(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ struct cpuid_leaf *leaf)
{
struct cpuid_leaf leaf_hv = *leaf;

@@ -532,7 +537,8 @@ static int snp_cpuid_postprocess(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
* Returns -EOPNOTSUPP if feature not enabled. Any other non-zero return value
* should be treated as fatal by caller.
*/
-static int snp_cpuid(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
+static int __pitext snp_cpuid(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
+ struct cpuid_leaf *leaf)
{
const struct snp_cpuid_table *cpuid_table = snp_cpuid_get_table();

@@ -574,7 +580,7 @@ static int snp_cpuid(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_le
* page yet, so it only supports the MSR based communication with the
* hypervisor and only the CPUID exit-code.
*/
-void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
+void __pitext do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
{
unsigned int subfn = lower_bits(regs->cx, 32);
unsigned int fn = lower_bits(regs->ax, 32);
@@ -1052,7 +1058,7 @@ static struct cc_blob_sev_info *find_cc_blob_setup_data(struct boot_params *bp)
* mapping needs to be updated in sync with all the changes to virtual memory
* layout and related mapping facilities throughout the boot process.
*/
-static void __init setup_cpuid_table(const struct cc_blob_sev_info *cc_info)
+static void __pitext setup_cpuid_table(const struct cc_blob_sev_info *cc_info)
{
const struct snp_cpuid_table *cpuid_table_fw, *cpuid_table;
int i;
diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
index 1ec753331524..62981b463b76 100644
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -682,8 +682,8 @@ static u64 __init get_jump_table_addr(void)
return ret;
}

-static void early_set_pages_state(unsigned long vaddr, unsigned long paddr,
- unsigned long npages, enum psc_op op)
+static void __pitext early_set_pages_state(unsigned long vaddr, unsigned long paddr,
+ unsigned long npages, enum psc_op op)
{
unsigned long paddr_end;
u64 val;
@@ -758,8 +758,8 @@ void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long padd
early_set_pages_state(vaddr, paddr, npages, SNP_PAGE_STATE_PRIVATE);
}

-void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
- unsigned long npages)
+void __pitext early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
+ unsigned long npages)
{
/*
* This can be invoked in early boot while running identity mapped, so
@@ -2062,7 +2062,7 @@ bool __init handle_vc_boot_ghcb(struct pt_regs *regs)
*
* Scan for the blob in that order.
*/
-static __init struct cc_blob_sev_info *find_cc_blob(struct boot_params *bp)
+static __pitext struct cc_blob_sev_info *find_cc_blob(struct boot_params *bp)
{
struct cc_blob_sev_info *cc_info;

@@ -2088,7 +2088,7 @@ static __init struct cc_blob_sev_info *find_cc_blob(struct boot_params *bp)
return cc_info;
}

-bool __init snp_init(struct boot_params *bp)
+bool __pitext snp_init(struct boot_params *bp)
{
struct cc_blob_sev_info *cc_info;

@@ -2110,7 +2110,7 @@ bool __init snp_init(struct boot_params *bp)
return true;
}

-void __init __noreturn snp_abort(void)
+void __pitext __noreturn snp_abort(void)
{
sev_es_terminate(SEV_TERM_SET_GEN, GHCB_SNP_UNSUPPORTED);
}
diff --git a/arch/x86/lib/memcpy_64.S b/arch/x86/lib/memcpy_64.S
index 0ae2e1712e2e..f56cb062d874 100644
--- a/arch/x86/lib/memcpy_64.S
+++ b/arch/x86/lib/memcpy_64.S
@@ -2,13 +2,14 @@
/* Copyright 2002 Andi Kleen */

#include <linux/export.h>
+#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/errno.h>
#include <asm/cpufeatures.h>
#include <asm/alternative.h>

-.section .noinstr.text, "ax"
+ __PITEXT

/*
* memcpy - Copy a memory block.
diff --git a/arch/x86/lib/memset_64.S b/arch/x86/lib/memset_64.S
index 0199d56cb479..455424dcadc0 100644
--- a/arch/x86/lib/memset_64.S
+++ b/arch/x86/lib/memset_64.S
@@ -2,11 +2,12 @@
/* Copyright 2002 Andi Kleen, SuSE Labs */

#include <linux/export.h>
+#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/cpufeatures.h>
#include <asm/alternative.h>

-.section .noinstr.text, "ax"
+ __PITEXT

/*
* ISO C memset - set a memory block to a byte value. This function uses fast
diff --git a/arch/x86/mm/mem_encrypt_boot.S b/arch/x86/mm/mem_encrypt_boot.S
index e25288ee33c2..f951f4f86e5c 100644
--- a/arch/x86/mm/mem_encrypt_boot.S
+++ b/arch/x86/mm/mem_encrypt_boot.S
@@ -7,6 +7,7 @@
* Author: Tom Lendacky <thomas.lendacky@amd.com>
*/

+#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/pgtable.h>
#include <asm/page.h>
@@ -14,7 +15,7 @@
#include <asm/msr-index.h>
#include <asm/nospec-branch.h>

- .text
+ __PITEXT
.code64
SYM_FUNC_START(sme_encrypt_execute)

diff --git a/arch/x86/mm/mem_encrypt_identity.c b/arch/x86/mm/mem_encrypt_identity.c
index 2e195866a7fe..bc39e04de980 100644
--- a/arch/x86/mm/mem_encrypt_identity.c
+++ b/arch/x86/mm/mem_encrypt_identity.c
@@ -85,7 +85,8 @@ struct sme_populate_pgd_data {
*/
static char sme_workarea[2 * PMD_SIZE] __section(".init.scratch");

-static void __init sme_clear_pgd(struct sme_populate_pgd_data *ppd)
+
+static void __pitext sme_clear_pgd(struct sme_populate_pgd_data *ppd)
{
unsigned long pgd_start, pgd_end, pgd_size;
pgd_t *pgd_p;
@@ -100,7 +101,7 @@ static void __init sme_clear_pgd(struct sme_populate_pgd_data *ppd)
memset(pgd_p, 0, pgd_size);
}

-static pud_t __init *sme_prepare_pgd(struct sme_populate_pgd_data *ppd)
+static pud_t __pitext *sme_prepare_pgd(struct sme_populate_pgd_data *ppd)
{
pgd_t *pgd;
p4d_t *p4d;
@@ -112,7 +113,7 @@ static pud_t __init *sme_prepare_pgd(struct sme_populate_pgd_data *ppd)
p4d = ppd->pgtable_area;
memset(p4d, 0, sizeof(*p4d) * PTRS_PER_P4D);
ppd->pgtable_area += sizeof(*p4d) * PTRS_PER_P4D;
- set_pgd(pgd, __pgd(PGD_FLAGS | __pa(p4d)));
+ set_pgd_kernel(pgd, __pgd(PGD_FLAGS | __pa(p4d)));
}

p4d = p4d_offset(pgd, ppd->vaddr);
@@ -120,7 +121,7 @@ static pud_t __init *sme_prepare_pgd(struct sme_populate_pgd_data *ppd)
pud = ppd->pgtable_area;
memset(pud, 0, sizeof(*pud) * PTRS_PER_PUD);
ppd->pgtable_area += sizeof(*pud) * PTRS_PER_PUD;
- set_p4d(p4d, __p4d(P4D_FLAGS | __pa(pud)));
+ set_p4d_kernel(p4d, __p4d(P4D_FLAGS | __pa(pud)));
}

pud = pud_offset(p4d, ppd->vaddr);
@@ -137,7 +138,7 @@ static pud_t __init *sme_prepare_pgd(struct sme_populate_pgd_data *ppd)
return pud;
}

-static void __init sme_populate_pgd_large(struct sme_populate_pgd_data *ppd)
+static void __pitext sme_populate_pgd_large(struct sme_populate_pgd_data *ppd)
{
pud_t *pud;
pmd_t *pmd;
@@ -153,7 +154,7 @@ static void __init sme_populate_pgd_large(struct sme_populate_pgd_data *ppd)
set_pmd(pmd, __pmd(ppd->paddr | ppd->pmd_flags));
}

-static void __init sme_populate_pgd(struct sme_populate_pgd_data *ppd)
+static void __pitext sme_populate_pgd(struct sme_populate_pgd_data *ppd)
{
pud_t *pud;
pmd_t *pmd;
@@ -179,7 +180,7 @@ static void __init sme_populate_pgd(struct sme_populate_pgd_data *ppd)
set_pte(pte, __pte(ppd->paddr | ppd->pte_flags));
}

-static void __init __sme_map_range_pmd(struct sme_populate_pgd_data *ppd)
+static void __pitext __sme_map_range_pmd(struct sme_populate_pgd_data *ppd)
{
while (ppd->vaddr < ppd->vaddr_end) {
sme_populate_pgd_large(ppd);
@@ -189,7 +190,7 @@ static void __init __sme_map_range_pmd(struct sme_populate_pgd_data *ppd)
}
}

-static void __init __sme_map_range_pte(struct sme_populate_pgd_data *ppd)
+static void __pitext __sme_map_range_pte(struct sme_populate_pgd_data *ppd)
{
while (ppd->vaddr < ppd->vaddr_end) {
sme_populate_pgd(ppd);
@@ -199,7 +200,7 @@ static void __init __sme_map_range_pte(struct sme_populate_pgd_data *ppd)
}
}

-static void __init __sme_map_range(struct sme_populate_pgd_data *ppd,
+static void __pitext __sme_map_range(struct sme_populate_pgd_data *ppd,
pmdval_t pmd_flags, pteval_t pte_flags)
{
unsigned long vaddr_end;
@@ -223,22 +224,22 @@ static void __init __sme_map_range(struct sme_populate_pgd_data *ppd,
__sme_map_range_pte(ppd);
}

-static void __init sme_map_range_encrypted(struct sme_populate_pgd_data *ppd)
+static void __pitext sme_map_range_encrypted(struct sme_populate_pgd_data *ppd)
{
__sme_map_range(ppd, PMD_FLAGS_ENC, PTE_FLAGS_ENC);
}

-static void __init sme_map_range_decrypted(struct sme_populate_pgd_data *ppd)
+static void __pitext sme_map_range_decrypted(struct sme_populate_pgd_data *ppd)
{
__sme_map_range(ppd, PMD_FLAGS_DEC, PTE_FLAGS_DEC);
}

-static void __init sme_map_range_decrypted_wp(struct sme_populate_pgd_data *ppd)
+static void __pitext sme_map_range_decrypted_wp(struct sme_populate_pgd_data *ppd)
{
__sme_map_range(ppd, PMD_FLAGS_DEC_WP, PTE_FLAGS_DEC_WP);
}

-static unsigned long __init sme_pgtable_calc(unsigned long len)
+static unsigned long __pitext sme_pgtable_calc(unsigned long len)
{
unsigned long entries = 0, tables = 0;

@@ -275,7 +276,7 @@ static unsigned long __init sme_pgtable_calc(unsigned long len)
return entries + tables;
}

-void __init sme_encrypt_kernel(struct boot_params *bp)
+void __pitext sme_encrypt_kernel(struct boot_params *bp)
{
unsigned long workarea_start, workarea_end, workarea_len;
unsigned long execute_start, execute_end, execute_len;
@@ -310,8 +311,8 @@ void __init sme_encrypt_kernel(struct boot_params *bp)
*/

/* Physical addresses gives us the identity mapped virtual addresses */
- kernel_start = __pa_symbol(_text);
- kernel_end = ALIGN(__pa_symbol(_end), PMD_SIZE);
+ kernel_start = __pa(_text);
+ kernel_end = ALIGN(__pa(_end), PMD_SIZE);
kernel_len = kernel_end - kernel_start;

initrd_start = 0;
@@ -488,7 +489,7 @@ void __init sme_encrypt_kernel(struct boot_params *bp)
native_write_cr3(__native_read_cr3());
}

-void __init sme_enable(struct boot_params *bp)
+void __pitext sme_enable(struct boot_params *bp)
{
unsigned int eax, ebx, ecx, edx;
unsigned long feature_mask;
--
2.43.0.429.g432eaa2c6b-goog