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x86/tdx: Tidy reset_pamt functions

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tdx_quirk_reset_paddr() was renamed to reflect that, in fact, the clearing
is necessary only for hardware with a certain quirk.  That is dealt with in
a subsequent patch.

Rename reset_pamt functions to contain "quirk" to reflect the new
functionality, and remove the now misleading comment.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Acked-by: Kai Huang <kai.huang@intel.com>
Acked-by: Vishal Annapurve <vannapurve@google.com>
Link: https://lore.kernel.org/all/20250819155811.136099-3-adrian.hunter%40intel.com
This commit is contained in:
Adrian Hunter 2025-08-19 18:58:10 +03:00 committed by Dave Hansen
parent 94272b084a
commit a27b008a5d
1 changed files with 4 additions and 12 deletions
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16
arch/x86/virt/vmx/tdx/tdx.c
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@ -660,17 +660,17 @@ void tdx_quirk_reset_page(struct page *page)
}
EXPORT_SYMBOL_GPL(tdx_quirk_reset_page);
static void tdmr_reset_pamt(struct tdmr_info *tdmr)
static void tdmr_quirk_reset_pamt(struct tdmr_info *tdmr)
{
tdmr_do_pamt_func(tdmr, tdx_quirk_reset_paddr);
}
static void tdmrs_reset_pamt_all(struct tdmr_info_list *tdmr_list)
static void tdmrs_quirk_reset_pamt_all(struct tdmr_info_list *tdmr_list)
{
int i;
for (i = 0; i < tdmr_list->nr_consumed_tdmrs; i++)
tdmr_reset_pamt(tdmr_entry(tdmr_list, i));
tdmr_quirk_reset_pamt(tdmr_entry(tdmr_list, i));
}
static unsigned long tdmrs_count_pamt_kb(struct tdmr_info_list *tdmr_list)
@ -1142,15 +1142,7 @@ static int init_tdx_module(void)
* to the kernel.
*/
wbinvd_on_all_cpus();
/*
* According to the TDX hardware spec, if the platform
* doesn't have the "partial write machine check"
* erratum, any kernel read/write will never cause #MC
* in kernel space, thus it's OK to not convert PAMTs
* back to normal. But do the conversion anyway here
* as suggested by the TDX spec.
*/
tdmrs_reset_pamt_all(&tdx_tdmr_list);
tdmrs_quirk_reset_pamt_all(&tdx_tdmr_list);
err_free_pamts:
tdmrs_free_pamt_all(&tdx_tdmr_list);
err_free_tdmrs: