diff options
| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2025-01-30 19:48:55 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-19 11:18:05 +0100 |
| commit | 8a3dc0f7c4ccf13098dba804be06799b4bd46c7a (patch) | |
| tree | 77c1abcc07c499ccc3da13f9be42378a1ab27d1e /arch/x86/kernel/amd_node.c | |
| parent | ad5a3a8f41aaa511b2150859ef5b1d76fff34fc9 (diff) | |
x86/amd_node, platform/x86/amd/hsmp: Have HSMP use SMN through AMD_NODE
The HSMP interface is just an SMN interface with different offsets.
Define an HSMP wrapper in the SMN code and have the HSMP platform driver
use that rather than a local solution.
Also, remove the "root" member from AMD_NB, since there are no more
users of it.
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Carlos Bilbao <carlos.bilbao@kernel.org>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20250130-wip-x86-amd-nb-cleanup-v4-1-b5cc997e471b@amd.com
Diffstat (limited to 'arch/x86/kernel/amd_node.c')
| -rw-r--r-- | arch/x86/kernel/amd_node.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_node.c b/arch/x86/kernel/amd_node.c index d2ec7fd555c5..65045f223c10 100644 --- a/arch/x86/kernel/amd_node.c +++ b/arch/x86/kernel/amd_node.c @@ -97,6 +97,9 @@ static DEFINE_MUTEX(smn_mutex); #define SMN_INDEX_OFFSET 0x60 #define SMN_DATA_OFFSET 0x64 +#define HSMP_INDEX_OFFSET 0xc4 +#define HSMP_DATA_OFFSET 0xc8 + /* * SMN accesses may fail in ways that are difficult to detect here in the called * functions amd_smn_read() and amd_smn_write(). Therefore, callers must do @@ -179,6 +182,12 @@ int __must_check amd_smn_write(u16 node, u32 address, u32 value) } EXPORT_SYMBOL_GPL(amd_smn_write); +int __must_check amd_smn_hsmp_rdwr(u16 node, u32 address, u32 *value, bool write) +{ + return __amd_smn_rw(HSMP_INDEX_OFFSET, HSMP_DATA_OFFSET, node, address, value, write); +} +EXPORT_SYMBOL_GPL(amd_smn_hsmp_rdwr); + static int amd_cache_roots(void) { u16 node, num_nodes = amd_num_nodes(); |