On Thu, Sep 05, 2024 at 10:26:52AM -0700, Charlie Jenkins wrote:
> On Thu, Sep 05, 2024 at 09:47:47AM +0300, Kirill A. Shutemov wrote:
> > On Thu, Aug 29, 2024 at 12:15:57AM -0700, Charlie Jenkins wrote:
> > > Some applications rely on placing data in free bits addresses alloc
On Thu, Sep 05, 2024 at 10:26:52AM -0700, Charlie Jenkins wrote:
> On Thu, Sep 05, 2024 at 09:47:47AM +0300, Kirill A. Shutemov wrote:
> > On Thu, Aug 29, 2024 at 12:15:57AM -0700, Charlie Jenkins wrote:
> > > Some applications rely on placing data in free bits addresses alloc
On Thu, Sep 05, 2024 at 10:26:52AM -0700, Charlie Jenkins wrote:
> On Thu, Sep 05, 2024 at 09:47:47AM +0300, Kirill A. Shutemov wrote:
> > On Thu, Aug 29, 2024 at 12:15:57AM -0700, Charlie Jenkins wrote:
> > > Some applications rely on placing data in free bits addresses alloc
e got tested on
x86 with 47bit VA.
We can consider more options to opt-in into wider address space like
personality or prctl() handle. But opt-out is no-go from what I see.
--
Kiryl Shutsemau / Kirill A. Shutemov
e got tested on
x86 with 47bit VA.
We can consider more options to opt-in into wider address space like
personality or prctl() handle. But opt-out is no-go from what I see.
--
Kiryl Shutsemau / Kirill A. Shutemov
___
linux-snps-arc mailing list
linux
e got tested on
x86 with 47bit VA.
We can consider more options to opt-in into wider address space like
personality or prctl() handle. But opt-out is no-go from what I see.
--
Kiryl Shutsemau / Kirill A. Shutemov
On Thu, Aug 15, 2024 at 02:15:40PM +0800, Baoquan He wrote:
> Cc Eric and kexec mailing list.
>
> On 08/14/24 at 03:46pm, Kirill A. Shutemov wrote:
> > The init_transition_pgtable() function sets up transitional page tables.
> > It ensures that the relocate_kernel() funct
On Thu, Aug 08, 2024 at 11:03:30AM -0400, Michael S. Tsirkin wrote:
> On Thu, Aug 08, 2024 at 04:15:25PM +0300, Kirill A. Shutemov wrote:
> > On Thu, Aug 08, 2024 at 08:10:34AM -0400, Michael S. Tsirkin wrote:
> > > On Thu, Aug 08, 2024 at 10:51:41AM +0300, Kirill A. Shutemov wro
On Thu, Aug 08, 2024 at 08:10:34AM -0400, Michael S. Tsirkin wrote:
> On Thu, Aug 08, 2024 at 10:51:41AM +0300, Kirill A. Shutemov wrote:
> > Hongyu reported a hang on kexec in a VM. QEMU reported invalid memory
> > accesses during the hang.
> >
> > Invalid read
e
> >is not in use.
> >
> >Looks like virtio-console continues to write to the MMIO even after
> >underlying virtio-pci device is removed.
> >
> >The problem can be mitigated by removing all virtio devices on virtio
> >bus shutdown.
> >
> >Sig
...
It was traced down to virtio-console. Kexec works fine if virtio-console
is not in use.
Looks like virtio-console continues to write to the MMIO even after
underlying virtio-pci device is removed.
The problem can be mitigated by removing all virtio devices on virtio
bus shutdown.
Signed-off-by
ned long __get_wchan(struct task_struct *p)
> return addr;
> }
>
> +static int get_coco_user_hcall_mode(void)
> +{
> + return !test_bit(MM_CONTEXT_COCO_USER_HCALL,
> + ¤t->mm->context.flags);
Hm. Why "!"?
--
Kiryl Shutsemau / Kirill A. Shutemov
On Mon, Jul 22, 2024 at 10:04:40PM -0700, Tim Merrifield wrote:
>
> Thanks for the review, Kirill.
>
> On Mon, Jul 08, 2024 at 03:19:54PM +0300, Kirill A . Shutemov wrote:
> > Hm. Per-thread flag is odd. I think it should be per-process.
>
> This is the only
ifdef CONFIG_INTEL_TDX_GUEST
> + .runtime.tdx_hcall = vmware_tdx_user_hcall,
> +#endif
> };
> --
> 2.40.1
>
--
Kiryl Shutsemau / Kirill A. Shutemov
long do_arch_prctl_common(int option, unsigned long arg2)
> {
> switch (option) {
> @@ -1052,6 +1067,11 @@ long do_arch_prctl_common(int option, unsigned long
> arg2)
> case ARCH_GET_XCOMP_GUEST_PERM:
> case ARCH_REQ_XCOMP_GUEST_PERM:
> return fpu_xstate_prctl(option, arg2);
> + case ARCH_GET_COCO_USER_HCALL:
> + return get_coco_user_hcall_mode();
> + case ARCH_SET_COCO_USER_HCALL:
> + return set_coco_user_hcall_mode(arg2);
> +
> }
>
> return -EINVAL;
> --
> 2.40.1
>
--
Kiryl Shutsemau / Kirill A. Shutemov
us_changed_phys(start_pa, end_pa, enc))
return false;
--
Kiryl Shutsemau / Kirill A. Shutemov
On Fri, Jun 14, 2024 at 09:06:30AM -0500, Tom Lendacky wrote:
> On 6/13/24 09:56, Borislav Petkov wrote:
> > On Thu, Jun 13, 2024 at 04:41:00PM +0300, Kirill A. Shutemov wrote:
> > > It is easy enough to do. See the patch below.
> >
> > Thanks, will have a look.
>
single CPU.
The change conforms to the approved ACPI spec change proposal. See the
Link.
Signed-off-by: Kirill A. Shutemov
Link: https://lore.kernel.org/all/13356251.uLZWGnKmhe@kreacher
Acked-by: Kai Huang
Acked-by: Rafael J. Wysocki
Reviewed-by: Kuppuswamy Sathyanarayanan
Reviewed-by: Thomas
When MADT is parsed, print MULTIPROC_WAKEUP information:
ACPI: MP Wakeup (version[1], mailbox[0x7fffd000], reset[0x7fffe068])
This debug information will be very helpful during bring up.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
Acked-by: Rafael J. Wysocki
Reviewed-by: Baoquan He
()
callback hooked up and the pgd_t to free.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/include/asm/init.h | 3 ++
arch/x86/mm/ident_map.c | 73 +
2 files changed, 76 insertions(+)
diff --git a/arch/x86/include/asm
If the helper is defined, it is called instead of halt() to stop the CPU
at the end of stop_this_cpu() and on crash CPU shutdown.
ACPI MADT will use it to hand over the CPU to BIOS in order to be able
to wake it up again after kexec.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
nel to use it.
This is safe as the booting kernel has the mailbox address cached
already and acpi_wakeup_cpu() uses the cached value to bring up the
secondary CPUs.
Note: This is a Linux specific convention and not covered by the
ACPI specification.
Signed-off-by: Kirill A. Shutemov
Acked-
conflicts with code that may
access shared memory.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Rick Edgecombe
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/coco/tdx/tdx.c | 94 +++
arch/x86/include/asm/pgtable.h| 5 ++
arch/x86/include/asm
s field has not been utilized in the code thus far.
Rename 'base_address' to 'mailbox_address' to clarify the kind of
address it represents. In version 1, the structure includes the reset
vector address. Clear and distinct naming helps to prevent any
confusion.
Signed-off-by
stored with E820_TYPE_ACPI and passed between
the kernels on kdump was getting zapped as the PMD entry mapping this
is above the E820_TYPE_RAM range for the reserved crashkernel memory.
Signed-off-by: Ashish Kalra
Signed-off-by: Kirill A. Shutemov
---
arch/x86/mm/init_64.c | 16
1
r TDX guest. TDX
guest uses E820_TYPE_ACPI to store the unaccepted memory bitmap and pass
it between the kernels on kexec.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Dave Hansen
Tested-by: Tao Liu
---
arch/x86/kernel/e820.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --
.
Keep track of the number of shared pages. This will allow for
cross-checking against the shared information in the direct mapping and
reporting if the shared bit is lost.
Memory conversion is slow and does not happen often. Global atomic is
not going to be a bottleneck.
Signed-off-by: Kirill A
.
- enc_kexec_finish() unshares all existing shared memory, reverting it
back to private.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Nikolay Borisov
Reviewed-by: Kai Huang
Tested-by: Tao Liu
Signed-off-by: Kirill A. Shutemov
---
arch/x86/include/asm/x86_init.h | 10 ++
arch/x86
TDX is going to have more than one reason to fail
enc_status_change_prepare().
Change the callback to return errno instead of assuming -EIO;
enc_status_change_finish() changed too to keep the interface symmetric.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Dave Hansen
Reviewed-by: Kai Huang
to indicate the size of the VA
covered by one PGD entry in 5-level paging mode.
Update comments for lookup_address() and lookup_address_in_pgd() to
reflect changes in the interface.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Rick Edgecombe
Reviewed-by: Baoquan He
Reviewed-by: Dave Hansen
T
From: Borislav Petkov
That identity_mapped() functions was loving that "1" label to the point
of completely confusing its readers.
Use named labels in each place for clarity.
No functional changes.
Signed-off-by: Borislav Petkov (AMD)
Signed-off-by: Kirill A. Shutemov
---
arch/
avoid raising any #VEs.
The change doesn't affect non-TDX-guest environments.
Signed-off-by: Kirill A. Shutemov
---
arch/x86/kernel/relocate_kernel_64.S | 17 ++---
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/relocate_kernel_64.S
b/arch/x86/k
In order to prepare for the expansion of support for the ACPI MADT
wakeup method, move the relevant code into a separate file.
Introduce a new configuration option to clearly indicate dependencies
without the use of ifdefs.
There have been no functional changes.
Signed-off-by: Kirill A
acpi_mp_wake_mailbox_paddr and acpi_mp_wake_mailbox initialized once
during ACPI MADT init and never changed.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
Acked-by: Rafael J. Wysocki
Reviewed-by: Baoquan He
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
---
arch/x86/kernel/acpi
e CPU.
Disable CPU offlining on ACPI MADT wakeup enumeration.
The change has no visible effects for users: currently, TDX guest is the
only platform that uses the ACPI MADT wakeup method.
Signed-off-by: Kirill A. Shutemov
Acked-by: Rafael J. Wysocki
Reviewed-by: Thomas Gleixner
Tested-by: Ta
place CC_ATTR_HOTPLUG_DISABLED for ACPI
MADT wakeup method.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
---
include/linux/cpuhplock.h | 2 ++
kernel/cpu.c | 13 -
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/linux/cpuhploc
ries mapping unaccepted memory table
during kdump.
Borislav Petkov (1):
x86/relocate_kernel: Use named labels for less confusion
Kirill A. Shutemov (17):
x86/acpi: Extract ACPI MADT wakeup code into a separate file
x86/apic: Mark acpi_mp_wake_* variables as __ro_after_init
cpu/h
PKE|DISABLE_LA57|DISABLE_UMIP| \
-DISABLE_ENQCMD)
+#define DISABLED_MASK16
(DISABLE_PKU|DISABLE_OSPKE|DISABLE_UMIP|DISABLE_ENQCMD)
#define DISABLED_MASK170
#define DISABLED_MASK18(DISABLE_IBT)
#define DISABLED_MASK19(DISABLE_SEV_SNP)
--
Kiryl Shutsemau / Kirill A. Shutemov
On Tue, Jun 11, 2024 at 09:46:53PM +0200, Borislav Petkov wrote:
> On Tue, Jun 11, 2024 at 06:47:05PM +0300, Kirill A. Shutemov wrote:
> > Borislav, given this code deduplication effort is not trivial, maybe we
> > can do it as a separate patchset on top of this one?
>
> Sur
On Tue, Jun 11, 2024 at 11:26:17AM -0700, H. Peter Anvin wrote:
> On 6/4/24 08:21, Kirill A. Shutemov wrote:
> >
> > From b45fe48092abad2612c2bafbb199e4de80c99545 Mon Sep 17 00:00:00 2001
> > From: "Kirill A. Shutemov"
> > Date: Fri, 10 Feb 2023 12:53:11
On Mon, Jun 10, 2024 at 05:01:55PM +0300, Kirill A. Shutemov wrote:
> On Mon, Jun 10, 2024 at 03:40:20PM +0200, Borislav Petkov wrote:
> > On Fri, Jun 07, 2024 at 06:14:28PM +0300, Kirill A. Shutemov wrote:
> > > I was able to address this issue by switching cpa_lock to a mute
ation (and rename the jump to using the expected ".L" prefix).
Oh. My bad.
Reviewed-by: Kirill A. Shutemov
--
Kiryl Shutsemau / Kirill A. Shutemov
On Mon, Jun 10, 2024 at 03:40:20PM +0200, Borislav Petkov wrote:
> On Fri, Jun 07, 2024 at 06:14:28PM +0300, Kirill A. Shutemov wrote:
> > I was able to address this issue by switching cpa_lock to a mutex.
> > However, this solution will only work if the callers for set_memory
&
nsigned
long address,
WARN_ONCE(num_online_cpus() > 1, "Don't call after initializing SMP");
retval = __change_page_attr_set_clr(&cpa, 1);
+ preempt_disable();
__flush_tlb_all();
+ preempt_enable();
return retval;
}
--
Kiryl Shutsemau / Kirill A. Shutemov
On Wed, Jun 05, 2024 at 06:24:19PM +0200, Borislav Petkov wrote:
> On Wed, Jun 05, 2024 at 03:21:42PM +0300, Kirill A. Shutemov wrote:
> > If a page can be accessed via private mapping is determined by the
> > presence in Secure EPT. This state persist across kexec.
>
>
On Tue, Jun 04, 2024 at 09:27:59AM -0700, Dave Hansen wrote:
> On 5/28/24 02:55, Kirill A. Shutemov wrote:
> > +/* Stop new private<->shared conversions */
> > +static void tdx_kexec_begin(bool crash)
> > +{
> > + /*
> > +* Crash kernel reaches here w
On Tue, Jun 04, 2024 at 08:05:54PM +0200, Borislav Petkov wrote:
> On Tue, Jun 04, 2024 at 07:14:00PM +0300, Kirill A. Shutemov wrote:
> > /*
> > * If tdx_enc_status_changed() fails, it leaves memory
> > * in an
On Tue, Jun 04, 2024 at 09:08:25AM -0700, Dave Hansen wrote:
> On 5/28/24 02:55, Kirill A. Shutemov wrote:
> > Keep track of the number of shared pages. This will allow for
> > cross-checking against the shared information in the direct mapping
> > and reporting if t
On Tue, Jun 04, 2024 at 08:47:22AM -0700, Dave Hansen wrote:
> On 6/4/24 08:32, Kirill A. Shutemov wrote:
> > What about the comment below?
> >
> > /*
> > * One possible reason for the failure is if kexec raced
> >
On Mon, Jun 03, 2024 at 10:37:54AM +0200, Borislav Petkov wrote:
> On Sun, Jun 02, 2024 at 05:23:03PM +0300, Kirill A. Shutemov wrote:
> > + /*
> > +* The only thing one can do at this point on failure
> > +* is panic
ove can simply be:
> >
> > andl $(X86_CR4_PAE | X86_CR4_LA54), %r13
> > movq %r13, %cr4
> >
> > %r13 is dead afterwards, and the PAE bit *will* be set in %r13 anyway.
>
> Yeah, with a proper comment. The testing of bits is not really needed.
I think
On Mon, Jun 03, 2024 at 06:37:45AM -0700, Dave Hansen wrote:
> On 6/2/24 04:54, Kirill A. Shutemov wrote:
> > Sean observed that the compiler is generating inefficient code to clear
> > the tdx_module_args struct for TDCALL and SEAMCALL wrappers. The
> > compiler i
conflicts with code that may
access shared memory.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Rick Edgecombe
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/coco/tdx/tdx.c | 90 +++
arch/x86/include/asm/pgtable.h| 5 ++
arch/x86/include/asm
On Fri, May 31, 2024 at 05:14:42PM +0200, Borislav Petkov wrote:
> On Tue, May 28, 2024 at 12:55:14PM +0300, Kirill A. Shutemov wrote:
> > +static void tdx_kexec_finish(void)
> > +{
> > + unsigned long addr, end;
> > + long found = 0, shared;
> > +
>
.
- enc_kexec_finish() unshares all existing shared memory, reverting it
back to private.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Nikolay Borisov
Reviewed-by: Kai Huang
Tested-by: Tao Liu
Signed-off-by: Kirill A. Shutemov
---
arch/x86/include/asm/x86_init.h | 12
arch
Please disregard this. I failed to fold changes :/
--
Kiryl Shutsemau / Kirill A. Shutemov
.
- enc_kexec_finish() unshares all existing shared memory, reverting it
back to private.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Nikolay Borisov
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/include/asm/x86_init.h | 9 +
arch/x86/kernel/crash.c | 12
grow/shrink: 3/22 up/down: 17/-313 (-296)
GCC tends to generate string instructions more frequently to clear the
struct.
Signed-off-by: Kirill A. Shutemov
Suggested-by: Dave Hansen
Cc: Sean Christopherson
---
arch/x86/boot/compressed/tdx.c| 32 ---
arch/x86/coco/tdx/tdx-shared.c
On Wed, May 29, 2024 at 01:47:50PM +0300, Nikolay Borisov wrote:
>
>
> On 28.05.24 г. 12:55 ч., Kirill A. Shutemov wrote:
> > From: Borislav Petkov
> >
> > That identity_mapped() functions was loving that "1" label to the point
> > of completely confu
TDX is going to have more than one reason to fail
enc_status_change_prepare().
Change the callback to return errno instead of assuming -EIO;
enc_status_change_finish() changed too to keep the interface symmetric.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Dave Hansen
Reviewed-by: Kai Huang
s field has not been utilized in the code thus far.
Rename 'base_address' to 'mailbox_address' to clarify the kind of
address it represents. In version 1, the structure includes the reset
vector address. Clear and distinct naming helps to prevent any
confusion.
Signed-off-by: Ki
r TDX guest. TDX
guest uses E820_TYPE_ACPI to store the unaccepted memory bitmap and pass
it between the kernels on kexec.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Dave Hansen
Tested-by: Tao Liu
---
arch/x86/kernel/e820.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --
()
callback hooked up and the pgd_t to free.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/include/asm/init.h | 3 ++
arch/x86/mm/ident_map.c | 73 +
2 files changed, 76 insertions(+)
diff --git a/arch/x86/include/asm
.
- enc_kexec_finish() unshares all existing shared memory, reverting it
back to private.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Nikolay Borisov
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/include/asm/x86_init.h | 9 +
arch/x86/kernel/crash.c | 12
.
Keep track of the number of shared pages. This will allow for
cross-checking against the shared information in the direct mapping and
reporting if the shared bit is lost.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/coco/tdx/tdx.c | 7 +++
1 file
When MADT is parsed, print MULTIPROC_WAKEUP information:
ACPI: MP Wakeup (version[1], mailbox[0x7fffd000], reset[0x7fffe068])
This debug information will be very helpful during bring up.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Baoquan He
Reviewed-by: Kuppuswamy Sathyanarayanan
Acked
CPU.
The change conforms to the approved ACPI spec change proposal. See the
Link.
Signed-off-by: Kirill A. Shutemov
Link: https://lore.kernel.org/all/13356251.uLZWGnKmhe@kreacher
Acked-by: Kai Huang
Reviewed-by: Kuppuswamy Sathyanarayanan
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
If the helper is defined, it is called instead of halt() to stop the CPU
at the end of stop_this_cpu() and on crash CPU shutdown.
ACPI MADT will use it to hand over the CPU to BIOS in order to be able
to wake it up again after kexec.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
nel to use it.
This is safe as the booting kernel has the mailbox address cached
already and acpi_wakeup_cpu() uses the cached value to bring up the
secondary CPUs.
Note: This is a Linux specific convention and not covered by the
ACPI specification.
Signed-off-by: Kirill A. Shutemov
Review
e CPU.
Disable CPU offlining on ACPI MADT wakeup enumeration.
The change has no visible effects for users: currently, TDX guest is the
only platform that uses the ACPI MADT wakeup method.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
---
arch/x86/coco/c
acpi_mp_wake_mailbox_paddr and acpi_mp_wake_mailbox initialized once
during ACPI MADT init and never changed.
Signed-off-by: Kirill A. Shutemov
Acked-by: Kai Huang
Reviewed-by: Baoquan He
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
---
arch/x86/kernel/acpi/madt_wakeup.c | 4 ++--
1 file
stored with E820_TYPE_ACPI and passed between
the kernels on kdump was getting zapped as the PMD entry mapping this
is above the E820_TYPE_RAM range for the reserved crashkernel memory.
Signed-off-by: Ashish Kalra
Signed-off-by: Kirill A. Shutemov
---
arch/x86/mm/init_64.c | 16
1
conflicts with code that may
access shared memory.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Rick Edgecombe
Reviewed-by: Kai Huang
Tested-by: Tao Liu
---
arch/x86/coco/tdx/tdx.c | 69 +++
arch/x86/include/asm/pgtable.h| 5 +++
arch/x86/include/asm
From: Borislav Petkov
That identity_mapped() functions was loving that "1" label to the point
of completely confusing its readers.
Use named labels in each place for clarity.
No functional changes.
Signed-off-by: Borislav Petkov (AMD)
Signed-off-by: Kirill A. Shutemov
---
arch/
to indicate the size of the VA
covered by one PGD entry in 5-level paging mode.
Update comments for lookup_address() and lookup_address_in_pgd() to
reflect changes in the interface.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Rick Edgecombe
Reviewed-by: Baoquan He
Reviewed-by: Dave Hansen
T
avoid raising any #VEs.
The change doesn't affect non-TDX-guest environments.
Signed-off-by: Kirill A. Shutemov
---
arch/x86/kernel/relocate_kernel_64.S | 16 ++--
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/relocate_kernel_64.S
b/arch/x86/k
place CC_ATTR_HOTPLUG_DISABLED for ACPI
MADT wakeup method.
Signed-off-by: Kirill A. Shutemov
Reviewed-by: Thomas Gleixner
Tested-by: Tao Liu
---
include/linux/cpu.h | 2 ++
kernel/cpu.c| 13 -
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/linux/cpu.h b/include/linux/
In order to prepare for the expansion of support for the ACPI MADT
wakeup method, move the relevant code into a separate file.
Introduce a new configuration option to clearly indicate dependencies
without the use of ifdefs.
There have been no functional changes.
Signed-off-by: Kirill A
target kernel/second kernel/;
- Update commit messages and comments;
Ashish Kalra (1):
x86/mm: Do not zap page table entries mapping unaccepted memory table
during kdump.
Borislav Petkov (1):
x86/relocate_kernel: Use named labels for less confusion
Kirill A. Shutemov (17):
x86/acpi: Extr
lock_tsc(); when
> Hyper-V TSC page is not enabled, hv_read_reference_counter defaults to
> be drivers/hv/hv_common.c: __hv_read_ref_counter(), which is suboptimal
> as it uses the slow MSR interface to get the time info.
Why can't the guest just read the TSC directly? Why do we need the page?
I am confused.
--
Kiryl Shutsemau / Kirill A. Shutemov
On Fri, May 17, 2024 at 08:57:10AM -0700, Dave Hansen wrote:
> On 5/17/24 07:19, Kirill A. Shutemov wrote:
> > - /*
> > -* TDINFO TDX module call is used to get the TD execution environment
> > -* information like GPA width, number of available vcpus, debug mode
&
On Fri, May 17, 2024 at 06:54:15PM +0200, Paolo Bonzini wrote:
> On 5/17/24 16:19, Kirill A. Shutemov wrote:
> > Introduce a set of macros that allow to generate wrappers for TDVMCALL
> > leafs. The macros uses tdvmcall_trmapoline() and provides SYSV-complaint
> > ABI on top o
On Fri, May 17, 2024 at 07:02:25PM +0200, Paolo Bonzini wrote:
> On 5/17/24 16:19, Kirill A. Shutemov wrote:
> > The function will be used from inline assembly to handle most TDVMCALL
> > cases.
>
> Perhaps add that the calling convention is designed to allow using the asm
&g
On Fri, May 17, 2024 at 08:21:37AM -0700, Dave Hansen wrote:
> On 5/17/24 07:19, Kirill A. Shutemov wrote:
> > TDCALL calls are centralized into a few megawrappers that take the
> > struct tdx_module_args as input. Most of the call sites only use a few
> > arguments, but
All code has been converted to new TDCALL wrappers.
Drop the old wrappers.
Signed-off-by: Kirill A. Shutemov
---
arch/x86/boot/compressed/tdx.c| 6
arch/x86/coco/tdx/tdcall.S| 60 ++-
arch/x86/coco/tdx/tdx-shared.c| 20 ---
arch/x86
tdx_early_init()
is code reduction.
Signed-off-by: Kirill A. Shutemov
---
arch/x86/coco/tdx/tdx.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index e1849878f3bc..6559f3842f67 100644
--- a/arch/x86/coco/tdx
Use newly introduced TDCALL_0() instead of tdcall() to issue
MR_REPORT tdcall.
It cuts code bloat substantially:
Function old new delta
tdx_mcall_get_report0229 111-118
Signed-off-by: Kirill A. Shutemov
---
arch/x86
Use newly introduced TDCALL_5() instead of tdcall() to issue
VP_VEINFO_GET tdcall.
It cuts code bloat substantially:
Function old new delta
tdx_get_ve_info 253 116-137
Signed-off-by: Kirill A. Shutemov
---
arch/x86
Use newly introduced TDCALL_5() instead of tdcall() to issue VP_INFO
tdcall.
It cuts code bloat slightly:
Function old new delta
tdx_early_init 780 744 -36
Signed-off-by: Kirill A. Shutemov
---
arch/x86/coco/tdx
Use newly introduced TDCALL_0() instead of __tdcall() to issue
PAGE_ACCEPT tdcall.
It cuts code bloat substantially:
Function old new delta
tdx_accept_memory592 233-359
Signed-off-by: Kirill A. Shutemov
---
arch/x86
Use newly introduced TDVMCALL_0() and TDVMCALL_1() instead of
__tdx_hypercall() to handle MMIO emulation.
It cuts code bloat substantially:
Function old new delta
tdx_handle_virt_exception 17471383-364
Signed-off-by: Kirill A
-by: Kirill A. Shutemov
---
arch/x86/coco/tdx/tdx.c | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index b7299e668564..e7ffe1cd6d32 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -49,15
hypercall directly in assembly.
It cuts code bloat substantially:
Function old new delta
tdx_panic222 59-163
Signed-off-by: Kirill A. Shutemov
---
arch/x86/coco/tdx/tdcall.S | 28
Introduce a set of macros that allow to generate wrappers for TDCALL
leafs.
There are three macros differentiated by number of return parameters.
Signed-off-by: Kirill A. Shutemov
---
arch/x86/include/asm/shared/tdx.h | 58 +++
1 file changed, 58 insertions(+)
diff
645 530-115
tdx_enc_status_change_prepare326 181-145
Total: Before=5553, After=5183, chg -6.66%
Signed-off-by: Kirill A. Shutemov
---
arch/x86/coco/tdx/tdx.c | 12 +++-
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/arch/x86/coco/tdx
Use newly introduced TDVMCALL_4() instead of __tdx_hypercall() to handle
CPUID instruction emulation.
It cuts code bloat substantially:
Function old new delta
tdx_handle_virt_exception 18191747 -72
Signed-off-by: Kirill A
old new delta
hv_tdx_hypercall 171 42-129
Signed-off-by: Kirill A. Shutemov
---
arch/x86/coco/tdx/tdcall.S | 30 ++
arch/x86/hyperv/ivm.c | 14 --
2 files changed, 30 insertions(+), 14
Use newly introduced TDVMCALL_0() instead of __tdx_hypercall() to issue
GET_QUOTE hypercall.
It cuts code bloat substantially:
Function old new delta
tdx_hcall_get_quote 188 76-112
Signed-off-by: Kirill A. Shutemov
Use newly introduced TDVMCALL_1() instead of __tdx_hypercall() to handle
MSR read emulation.
It cuts code bloat substantially:
Function old new delta
tdx_handle_virt_exception 20521947-105
Signed-off-by: Kirill A. Shutemov
: dozens of instructions per call site to clear unused
fields of the structure.
This issue can be avoided by using more targeted wrappers.
tdvmcall_trampoline() provides a common base for them.
The function will be used from inline assembly to handle most TDVMCALL
cases.
Signed-off-by: Kirill A
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