[PATCH v7 02/45] x86/sev: detect/setup SEV/SME features earlier in boot
From: Brijesh Singh <hidden>
Date: 2021-11-10 22:08:09
Also in:
kvm, linux-efi, linux-mm, lkml, platform-driver-x86
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Michael Roth <redacted> sme_enable() handles feature detection for both SEV and SME. Future patches will also use it for SEV-SNP feature detection/setup, which will need to be done immediately after the first #VC handler is set up. Move it now in preparation. Signed-off-by: Michael Roth <redacted> Signed-off-by: Brijesh Singh <redacted> --- arch/x86/include/asm/setup.h | 2 +- arch/x86/kernel/head64.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index a12458a7a8d4..cee1e816fdcd 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h@@ -50,7 +50,7 @@ extern void reserve_standard_io_resources(void); extern void i386_reserve_resources(void); extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); extern unsigned long __startup_secondary_64(void); -extern void startup_64_setup_env(unsigned long physbase); +extern void startup_64_setup_env(unsigned long physbase, struct boot_params *bp); extern void early_setup_idt(void); extern void __init do_early_exception(struct pt_regs *regs, int trapnr);
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index fc5371a7e9d1..4eb83ae7ceb8 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c@@ -163,9 +163,6 @@ unsigned long __head __startup_64(unsigned long physaddr, if (load_delta & ~PMD_PAGE_MASK) for (;;); - /* Activate Secure Memory Encryption (SME) if supported and enabled */ - sme_enable(bp); - /* Include the SME encryption mask in the fixup value */ load_delta += sme_get_me_mask();
@@ -594,7 +591,7 @@ void early_setup_idt(void) /* * Setup boot CPU state needed before kernel switches to virtual addresses. */ -void __head startup_64_setup_env(unsigned long physbase) +void __head startup_64_setup_env(unsigned long physbase, struct boot_params *bp) { /* Load GDT */ startup_gdt_descr.address = (unsigned long)fixup_pointer(startup_gdt, physbase);
@@ -606,4 +603,7 @@ void __head startup_64_setup_env(unsigned long physbase) "movl %%eax, %%es\n" : : "a"(__KERNEL_DS) : "memory"); startup_64_load_idt(physbase); + + /* Activate SEV/SME memory encryption if supported/enabled. */ + sme_enable(bp); }
--
2.25.1