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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-01 23:54:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-01 23:54:56 -0700
commitd3b5d35290d729a2518af00feca867385a1b08fa (patch)
tree7b56c0863d59bc57f7c7dcf5d5665c56b05f1d1b /arch/x86/kvm
parentaa2a4b6569d5b10491b606a86e574dff3852597a (diff)
parent71389703839ebe9cb426c72d5f0bd549592e583c (diff)
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar: "The main x86 MM changes in this cycle were: - continued native kernel PCID support preparation patches to the TLB flushing code (Andy Lutomirski) - various fixes related to 32-bit compat syscall returning address over 4Gb in applications, launched from 64-bit binaries - motivated by C/R frameworks such as Virtuozzo. (Dmitry Safonov) - continued Intel 5-level paging enablement: in particular the conversion of x86 GUP to the generic GUP code. (Kirill A. Shutemov) - x86/mpx ABI corner case fixes/enhancements (Joerg Roedel) - ... plus misc updates, fixes and cleanups" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (62 commits) mm, zone_device: Replace {get, put}_zone_device_page() with a single reference to fix pmem crash x86/mm: Fix flush_tlb_page() on Xen x86/mm: Make flush_tlb_mm_range() more predictable x86/mm: Remove flush_tlb() and flush_tlb_current_task() x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly() x86/mm/64: Fix crash in remove_pagetable() Revert "x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation" x86/boot/e820: Remove a redundant self assignment x86/mm: Fix dump pagetables for 4 levels of page tables x86/mpx, selftests: Only check bounds-vs-shadow when we keep shadow x86/mpx: Correctly report do_mpx_bt_fault() failures to user-space Revert "x86/mm/numa: Remove numa_nodemask_from_meminfo()" x86/espfix: Add support for 5-level paging x86/kasan: Extend KASAN to support 5-level paging x86/mm: Add basic defines/helpers for CONFIG_X86_5LEVEL=y x86/paravirt: Add 5-level support to the paravirt code x86/mm: Define virtual memory map for 5-level paging x86/asm: Remove __VIRTUAL_MASK_SHIFT==47 assert x86/boot: Detect 5-level paging support x86/mm/numa: Remove numa_nodemask_from_meminfo() ...
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/svm.c4
-rw-r--r--arch/x86/kvm/vmx.c12
2 files changed, 5 insertions, 11 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 5fba70646c32..5f48f62b8dc2 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -741,7 +741,6 @@ static int svm_hardware_enable(void)
struct svm_cpu_data *sd;
uint64_t efer;
- struct desc_ptr gdt_descr;
struct desc_struct *gdt;
int me = raw_smp_processor_id();
@@ -763,8 +762,7 @@ static int svm_hardware_enable(void)
sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
sd->next_asid = sd->max_asid + 1;
- native_store_gdt(&gdt_descr);
- gdt = (struct desc_struct *)gdt_descr.address;
+ gdt = get_current_gdt_rw();
sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
wrmsrl(MSR_EFER, efer | EFER_SVME);
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 259e9b28ccf8..1a471e5f963f 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -935,7 +935,6 @@ static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
* when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it.
*/
static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
-static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
/*
* We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we
@@ -2057,14 +2056,13 @@ static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
*/
static unsigned long segment_base(u16 selector)
{
- struct desc_ptr *gdt = this_cpu_ptr(&host_gdt);
struct desc_struct *table;
unsigned long v;
if (!(selector & ~SEGMENT_RPL_MASK))
return 0;
- table = (struct desc_struct *)gdt->address;
+ table = get_current_gdt_ro();
if ((selector & SEGMENT_TI_MASK) == SEGMENT_LDT) {
u16 ldt_selector = kvm_read_ldt();
@@ -2169,7 +2167,7 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx)
#endif
if (vmx->host_state.msr_host_bndcfgs)
wrmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs);
- load_gdt(this_cpu_ptr(&host_gdt));
+ load_fixmap_gdt(raw_smp_processor_id());
}
static void vmx_load_host_state(struct vcpu_vmx *vmx)
@@ -2271,7 +2269,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
}
if (!already_loaded) {
- struct desc_ptr *gdt = this_cpu_ptr(&host_gdt);
+ void *gdt = get_current_gdt_ro();
unsigned long sysenter_esp;
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
@@ -2282,7 +2280,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
*/
vmcs_writel(HOST_TR_BASE,
(unsigned long)this_cpu_ptr(&cpu_tss));
- vmcs_writel(HOST_GDTR_BASE, gdt->address);
+ vmcs_writel(HOST_GDTR_BASE, (unsigned long)gdt); /* 22.2.4 */
/*
* VM exits change the host TR limit to 0x67 after a VM
@@ -3471,8 +3469,6 @@ static int hardware_enable(void)
ept_sync_global();
}
- native_store_gdt(this_cpu_ptr(&host_gdt));
-
return 0;
}