Displaying 5 results from an estimated 5 matches for "__wrmsr".
2020 Jul 24
0
[PATCH v5 30/75] x86/head/64: Setup MSR_GS_BASE before calling into C code
...m volatile("movl %%eax, %%ds\n"
"movl %%eax, %%ss\n"
"movl %%eax, %%es\n" : : "a"(__KERNEL_DS) : "memory");
+
+ /* Setup GS_BASE - needed for stack protector */
+ gsbase = (unsigned long)fixup_pointer((void *)initial_gs, physbase);
+ __wrmsr(MSR_GS_BASE, (u32)gsbase, (u32)(gsbase >> 32));
}
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 2b2e91627221..800053219054 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -78,6 +78,14 @@ SYM_CODE_START_NOALIGN(startup_64)
call startup_64...
2020 Aug 24
0
[PATCH v6 31/76] x86/head/64: Setup MSR_GS_BASE before calling into C code
...m volatile("movl %%eax, %%ds\n"
"movl %%eax, %%ss\n"
"movl %%eax, %%es\n" : : "a"(__KERNEL_DS) : "memory");
+
+ /* Setup GS_BASE - needed for stack protector */
+ gsbase = (unsigned long)fixup_pointer((void *)initial_gs, physbase);
+ __wrmsr(MSR_GS_BASE, (u32)gsbase, (u32)(gsbase >> 32));
}
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 2b2e91627221..800053219054 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -78,6 +78,14 @@ SYM_CODE_START_NOALIGN(startup_64)
call startup_64...
2020 Aug 24
0
[PATCH v6 70/76] x86/smpboot: Setup TSS for starting AP
...x86/kernel/head64.c b/arch/x86/kernel/head64.c
index ce2d8284edb9..b26a7f1bd6fe 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -545,3 +545,14 @@ void __head startup_64_setup_env(unsigned long physbase)
gsbase = (unsigned long)fixup_pointer((void *)initial_gs, physbase);
__wrmsr(MSR_GS_BASE, (u32)gsbase, (u32)(gsbase >> 32));
}
+
+void __head early_load_tss(void)
+{
+ struct desc_struct *gdt = (struct desc_struct *)early_gdt_descr.address;
+ tss_desc tss;
+
+ /* Load TSS only if entry in GDT is marked present */
+ memcpy(&tss, &gdt[GDT_ENTRY_TSS], sizeof(tss...
2020 Jul 24
86
[PATCH v5 00/75] x86: SEV-ES Guest Support
From: Joerg Roedel <jroedel at suse.de>
Hi,
here is a rebased version of the latest SEV-ES patches. They are now
based on latest tip/master instead of upstream Linux and include the
necessary changes.
Changes to v4 are in particular:
- Moved early IDT setup code to idt.c, because the idt_descr
and the idt_table are now static
- This required to make stack protector work early (or
2020 Aug 24
96
[PATCH v6 00/76] x86: SEV-ES Guest Support
From: Joerg Roedel <jroedel at suse.de>
Hi,
here is the new version of the SEV-ES client enabling patch-set. It is
based on the latest tip/master branch and contains the necessary
changes. In particular those ar:
- Enabling CR4.FSGSBASE early on supported processors so that
early #VC exceptions on APs can be handled.
- Add another patch (patch 1) to fix a KVM frame-size build