linux-toradex.git/arch/x86/kernel/kvm.c, branch v6.16

x86/cpuid: Rename hypervisor_cpuid_base()/for_each_possible_hypervisor_cpuid_base() to cpuid_base_hypervisor()/for_each_possible_cpuid_base_hypervisor()

2025-05-16T08:54:47+00:00

In order to let all the APIs under  have a shared "cpuid_"
namespace, rename hypervisor_cpuid_base() to cpuid_base_hypervisor().

To align with the new style, also rename:

    for_each_possible_hypervisor_cpuid_base(function)

to:

    for_each_possible_cpuid_base_hypervisor(function)

Adjust call-sites accordingly.

Suggested-by: Ingo Molnar 
Signed-off-by: Ahmed S. Darwish 
Signed-off-by: Ingo Molnar 
Cc: Andrew Cooper 
Cc: Dave Hansen 
Cc: David Woodhouse 
Cc: H. Peter Anvin 
Cc: John Ogness 
Cc: Paolo Bonzini 
Cc: Sean Christopherson 
Cc: Vitaly Kuznetsov 
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/aCZOi0Oohc7DpgTo@lx-t490

x86/msr: Replace wrmsr(msr, low, 0) with wrmsrq(msr, low)

2025-05-02T08:36:36+00:00

The third argument in wrmsr(msr, low, 0) is unnecessary.  Instead, use
wrmsrq(msr, low), which automatically sets the higher 32 bits of the
MSR value to 0.

Signed-off-by: Xin Li (Intel) 
Signed-off-by: Ingo Molnar 
Acked-by: Peter Zijlstra (Intel) 
Cc: Andy Lutomirski 
Cc: Brian Gerst 
Cc: David Woodhouse 
Cc: H. Peter Anvin 
Cc: Josh Poimboeuf 
Cc: Juergen Gross 
Cc: Kees Cook 
Cc: Linus Torvalds 
Cc: Paolo Bonzini 
Cc: Sean Christopherson 
Cc: Stefano Stabellini 
Cc: Uros Bizjak 
Cc: Vitaly Kuznetsov 
Link: https://lore.kernel.org/r/20250427092027.1598740-15-xin@zytor.com

x86/msr: Add explicit includes of

2025-05-02T08:23:47+00:00

For historic reasons there are some TSC-related functions in the
 header, even though there's an  header.

To facilitate the relocation of rdtsc{,_ordered}() from 
to  and to eventually eliminate the inclusion of
 in , add an explicit  dependency
to the source files that reference definitions from .

[ mingo: Clarified the changelog. ]

Signed-off-by: Xin Li (Intel) 
Signed-off-by: Ingo Molnar 
Acked-by: Dave Hansen 
Acked-by: Peter Zijlstra (Intel) 
Acked-by: Ilpo Järvinen 
Cc: Andy Lutomirski 
Cc: Brian Gerst 
Cc: Juergen Gross 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Kees Cook 
Cc: Peter Zijlstra 
Cc: Borislav Petkov 
Cc: Thomas Gleixner 
Cc: Josh Poimboeuf 
Cc: Uros Bizjak 
Link: https://lore.kernel.org/r/20250501054241.1245648-1-xin@zytor.com

x86/msr: Rename 'wrmsrl()' to 'wrmsrq()'

2025-04-10T09:58:33+00:00

Suggested-by: "H. Peter Anvin" 
Signed-off-by: Ingo Molnar 
Acked-by: Peter Zijlstra (Intel) 
Cc: Juergen Gross 
Cc: Dave Hansen 
Cc: Xin Li 
Cc: Linus Torvalds

x86/msr: Rename 'rdmsrl()' to 'rdmsrq()'

2025-04-10T09:58:27+00:00

Suggested-by: "H. Peter Anvin" 
Signed-off-by: Ingo Molnar 
Acked-by: Peter Zijlstra (Intel) 
Cc: Juergen Gross 
Cc: Dave Hansen 
Cc: Xin Li 
Cc: Linus Torvalds

x86/mm: Remove pv_ops.mmu.tlb_remove_table call

2025-02-21T15:20:12+00:00

Every pv_ops.mmu.tlb_remove_table call ends up calling tlb_remove_table.

Get rid of the indirection by simply calling tlb_remove_table directly,
and not going through the paravirt function pointers.

Suggested-by: Qi Zheng 
Signed-off-by: Rik van Riel 
Signed-off-by: Ingo Molnar 
Tested-by: Manali Shukla 
Tested-by: Brendan Jackman 
Tested-by: Michael Kelley 
Link: https://lore.kernel.org/r/20250213161423.449435-3-riel@surriel.com

x86/mtrr: Rename mtrr_overwrite_state() to guest_force_mtrr_state()

2024-12-04T18:46:19+00:00

Rename the helper to better reflect its function.

Suggested-by: Dave Hansen 
Signed-off-by: Kirill A. Shutemov 
Signed-off-by: Dave Hansen 
Acked-by: Dave Hansen 
Link: https://lore.kernel.org/all/20241202073139.448208-1-kirill.shutemov%40linux.intel.com

x86/kvm: Override default caching mode for SEV-SNP and TDX

2024-10-20T11:07:02+00:00

AMD SEV-SNP and Intel TDX have limited access to MTRR: either it is not
advertised in CPUID or it cannot be programmed (on TDX, due to #VE on
CR0.CD clear).

This results in guests using uncached mappings where it shouldn't and
pmd/pud_set_huge() failures due to non-uniform memory type reported by
mtrr_type_lookup().

Override MTRR state, making it WB by default as the kernel does for
Hyper-V guests.

Signed-off-by: Kirill A. Shutemov 
Suggested-by: Binbin Wu 
Cc: Juergen Gross 
Cc: Tom Lendacky 
Reviewed-by: Juergen Gross 
Message-ID: <20241015095818.357915-1-kirill.shutemov@linux.intel.com>
Signed-off-by: Paolo Bonzini

Merge tag 'v6.9-rc3' into locking/core, to pick up fixes

2024-04-09T07:48:09+00:00

Signed-off-by: Ingo Molnar

x86/kvm: Make kvm_async_pf_enabled __ro_after_init

2024-03-22T10:18:19+00:00

kvm_async_pf_enabled is only ever enabled in __init kvm_guest_init(), so
mark it as __ro_after_init.

Signed-off-by: Valentin Schneider 
Signed-off-by: Ingo Molnar 
Reviewed-by: Sean Christopherson 
Acked-by: Josh Poimboeuf 
Link: https://lore.kernel.org/r/20240313180106.2917308-4-vschneid@redhat.com