On Fri, Jan 26, 2024 at 02:21:30PM +, Huang, Kai wrote:
> > +static int __init acpi_mp_setup_reset(u64 reset_vector)
> > +{
> > + pgd_t *pgd;
> > + struct x86_mapping_info info = {
> > + .alloc_pgt_page = alloc_pgt_page,
> > + .free_pgt_page = free_pgt_page,
> > +
On Mon, Jan 08, 2024 at 01:13:18PM +, Huang, Kai wrote:
> On Mon, 2024-01-08 at 13:17 +0300, kirill.shute...@linux.intel.com wrote:
> > On Mon, Jan 08, 2024 at 03:30:21AM +, Huang, Kai wrote:
> > > On Mon, 2024-01-08 at 03:13 +, Huang, Kai wrote:
> > > &g
On Mon, Jan 08, 2024 at 03:30:21AM +, Huang, Kai wrote:
> On Mon, 2024-01-08 at 03:13 +, Huang, Kai wrote:
> > On Sat, 2023-12-23 at 02:52 +0300, Kirill A. Shutemov wrote:
> > > The helper complements kernel_ident_mapping_init(): it frees the
> > > identity mapping that was previously
On Mon, Jan 08, 2024 at 03:04:31AM +, Huang, Kai wrote:
> On Mon, 2023-12-25 at 11:05 +0300, Kirill A. Shutemov wrote:
> > 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
On Fri, Jan 05, 2024 at 07:38:48PM +, Edgecombe, Rick P wrote:
> The break apart looks good.
>
> On Sat, 2023-12-23 at 02:52 +0300, Kirill A. Shutemov wrote:
> > + while (addr < end) {
> > + unsigned long size;
> > + unsigned int level;
> > +
On Tue, Dec 05, 2023 at 11:36:55PM +, Huang, Kai wrote:
>
> > +
> > +static void acpi_mp_stop_other_cpus(int wait)
> > +{
> > + smp_shutdown_nonboot_cpus(smp_processor_id());
> > +}
>
> Is this and ...
>
> + smp_ops.stop_other_cpus = acpi_mp_stop_other_cpus;
>
> ... this below still
On Wed, Dec 06, 2023 at 01:28:08AM +, Edgecombe, Rick P wrote:
> On Tue, 2023-12-05 at 03:45 +0300, Kirill A. Shutemov wrote:
> > +static void tdx_kexec_unshare_mem(bool crash)
> > +{
> > + unsigned long addr, end;
> > + long found = 0, shared;
> > +
> > + /* Stop new
On Tue, Dec 05, 2023 at 11:58:45PM +, Huang, Kai wrote:
> On Tue, 2023-12-05 at 03:45 +0300, Kirill A. Shutemov wrote:
> > TDX guests are not allowed to clear CR4.MCE. Attempt to clear it leads
> > to #VE.
> >
> > Use alternatives to keep the flag during kexec for TDX guests.
> >
> > The
On Thu, Nov 23, 2023 at 09:38:13AM +, Huang, Kai wrote:
>
> > diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
> > index 171d86fe71ef..602b5d3982ff 100644
> > --- a/arch/x86/kernel/acpi/boot.c
> > +++ b/arch/x86/kernel/acpi/boot.c
> > @@ -22,6 +22,7 @@
> > #include
> >
On Wed, Nov 22, 2023 at 10:07:44AM +, Huang, Kai wrote:
> On Tue, 2023-11-21 at 12:58 +0300, kirill.shute...@linux.intel.com wrote:
> > On Tue, Nov 21, 2023 at 03:46:41AM +, Huang, Kai wrote:
> > >
> > > >
> > > > +static atomic_t con
On Tue, Nov 21, 2023 at 03:46:41AM +, Huang, Kai wrote:
>
> >
> > +static atomic_t conversions_in_progress;
> > +static bool conversion_allowed = true;
> >
>
> [...]
>
> > /* Used while preparing memory map entries for second kernel */
> > struct crash_memmap_data {
> > @@ -107,6
On Tue, Nov 21, 2023 at 12:42:20PM +0300, kirill.shute...@linux.intel.com wrote:
> > That being said, I think perhaps you can separate the /sysfs part as a
> > separate
> > patch because it's not a mandatory part of this series but a nice to have.
> > Then
> > t
On Tue, Nov 21, 2023 at 02:47:29AM +, Huang, Kai wrote:
>
> > +static atomic_long_t nr_shared;
> > +
> > +static inline bool pte_decrypted(pte_t pte)
> > +{
> > + return cc_mkdec(pte_val(pte)) == pte_val(pte);
> > +}
> > +
> > /* Called from __tdx_hypercall() for unrecoverable failure */
>
On Tue, Nov 21, 2023 at 02:15:59AM +, Huang, Kai wrote:
> On Wed, 2023-11-15 at 15:00 +0300, Kirill A. Shutemov wrote:
> > The ACPI MADT mailbox wakeup method doesn't allow to offline CPU after
> > it got woke up.
> >
> > Currently offlining hotplug is prevented based on the confidential
> >
On Tue, Oct 24, 2023 at 10:11:58AM +, Huang, Kai wrote:
>
> > --- /dev/null
> > +++ b/arch/x86/kernel/acpi/madt.S
>
> I think the name 'madt.S' is too generic. How about something be more
> specific
> such as madt_reset.S, or madt_playdead.S, etc?
Okay, madt_playdead.S sounds good.
> >
On Mon, Oct 23, 2023 at 09:30:59AM +, Huang, Kai wrote:
> IMHO it's a little bit odd to have two mechanisms in place, even in this
> middle
> state patch. Is it better to completely replace CC_ATTR_HOTPLUG_DISABLED with
> the new cpu_hotplug_offline_disabled in this patch? You can explicitly
On Fri, Oct 20, 2023 at 11:58:58AM +, Huang, Kai wrote:
> On Tue, 2023-10-10 at 10:24 +, Huang, Kai wrote:
> > > /* Physical address of the Multiprocessor Wakeup Structure mailbox */
> > > @@ -74,6 +75,9 @@ int __init acpi_parse_mp_wake(union
> > > acpi_subtable_headers *header,
> > >
On Fri, Oct 20, 2023 at 11:21:34AM +, Huang, Kai wrote:
>
> > --- /dev/null
> > +++ b/arch/x86/kernel/acpi/madt.S
> > @@ -0,0 +1,28 @@
> > +#include
> > +#include
> > +#include
> > +#include
> > +
> > + .text
> > + .align PAGE_SIZE
> > +SYM_FUNC_START(asm_acpi_mp_play_dead)
> > + /*
On Fri, Oct 20, 2023 at 09:49:59AM +, Huang, Kai wrote:
> On Thu, 2023-10-05 at 16:14 +0300, Kirill A. Shutemov wrote:
> > struct acpi_madt_multiproc_wakeup {
> > struct acpi_subtable_header header;
> > - u16 mailbox_version;
> > + u16 version;
> > u32 reserved; /*
On Fri, Oct 20, 2023 at 03:29:24AM +, Huang, Kai wrote:
> On Thu, 2023-10-05 at 16:14 +0300, Kirill A. Shutemov wrote:
> > ACPI MADT doesn't allow to offline CPU after it got woke up. It limits
> > kexec: target kernel won't be able to use more than one CPU.
> >
> > Zero out mailbox address
On Tue, Oct 10, 2023 at 10:05:21AM +, Huang, Kai wrote:
>
> > +#ifdef CONFIG_DEBUG_FS
> > +static int tdx_shared_memory_show(struct seq_file *m, void *p)
> > +{
> > + unsigned long addr, end;
> > + unsigned long found = 0;
> > +
> > + addr = PAGE_OFFSET;
> > + end = PAGE_OFFSET +
On Mon, Oct 09, 2023 at 12:30:55PM +, Huang, Kai wrote:
> On Thu, 2023-10-05 at 16:13 +0300, Kirill A. Shutemov wrote:
> > TDX guests are not allowed to clear CR4.MCE. Attempt to clear it leads
> > to #VE.
> >
> > Use alternatives to keep the flag during kexec for TDX guests.
> >
> > The
On Fri, Oct 06, 2023 at 10:22:54AM +, Huang, Kai wrote:
> On Thu, 2023-10-05 at 16:13 +0300, Kirill A. Shutemov wrote:
> > In order to prepare for the expansion of support for the ACPI MADT
> > wakeup method, the relevant code has been moved into a separate file.
> > A new configuration option
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