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| author | Cédric Le Goater <clg@kaod.org> | 2017-08-30 21:46:15 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-09-02 21:02:37 +1000 |
| commit | bed81ee181dd6b21171cffbb80472cc5b774c24d (patch) | |
| tree | 9f157198f03b7afa7ace7aa3066439055b23d79d /arch/powerpc/include/asm/xive.h | |
| parent | c58a14a9ccf0a79bbdafc106a95c080340c00f49 (diff) | |
| download | linux-bed81ee181dd6b21171cffbb80472cc5b774c24d.tar.gz linux-bed81ee181dd6b21171cffbb80472cc5b774c24d.tar.bz2 linux-bed81ee181dd6b21171cffbb80472cc5b774c24d.zip | |
powerpc/xive: introduce H_INT_ESB hcall
The H_INT_ESB hcall() is used to issue a load or store to the ESB page
instead of using the MMIO pages. This can be used as a workaround on
some HW issues. The OS knows that this hcall should be used on an
interrupt source when the ESB hcall flag is set to 1 in the hcall
H_INT_GET_SOURCE_INFO.
To maintain the frontier between the xive frontend and backend, we
introduce a new xive operation 'esb_rw' to be used in the routines
doing memory accesses on the ESBs.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/xive.h')
| -rw-r--r-- | arch/powerpc/include/asm/xive.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h index 64ec9bbcf03e..371fbebf1ec9 100644 --- a/arch/powerpc/include/asm/xive.h +++ b/arch/powerpc/include/asm/xive.h @@ -56,6 +56,7 @@ struct xive_irq_data { #define XIVE_IRQ_FLAG_SHIFT_BUG 0x04 #define XIVE_IRQ_FLAG_MASK_FW 0x08 #define XIVE_IRQ_FLAG_EOI_FW 0x10 +#define XIVE_IRQ_FLAG_H_INT_ESB 0x20 #define XIVE_INVALID_CHIP_ID -1 |